A surgical instrument

Abstract

This application discloses a surgical instrument comprising a handle assembly, a barrel assembly, and an actuator assembly. The proximal end of the barrel assembly is connected to the handle assembly. The barrel assembly includes a transmission mechanism, a first pusher, a second pusher, and a contact member. The contact member is disposed on the first pusher, and the transmission mechanism is connected to the first pusher. The distal end of the barrel assembly is connected to the actuator assembly. The actuator assembly includes a first jaw and a second jaw. The proximal end of the first jaw has a fixed rotating shaft, and the proximal end of the second jaw is rotatably connected to the fixed rotating shaft. The first pusher has a first mating surface, and the second jaw has a second mating surface. The transmission mechanism can drive the first pusher to move toward the distal end of the actuator assembly, thereby causing the first mating surface to press against the second mating surface. The second jaw has a mating portion, and the contact member is movably engaged with the mating portion. The transmission mechanism can also drive the first pusher away from the actuator assembly, thereby causing the contact member to press against the mating portion.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a surgical instrument. Background Technology

[0002] Currently, minimally invasive surgery occupies an important position in surgical procedures, and surgical instruments are commonly used in minimally invasive surgery. The working principle of surgical instruments is to clamp the distal actuator at a specific position near the lesion, remove the tissue using the distal actuator's cutting blade, and simultaneously suture using the distal actuator's staple cartridge assembly.

[0003] The distal actuators of surgical instruments typically include a first jaw and a second jaw that can move relative to each other. In existing surgical instruments, the first and second jaws often employ a combination of a pusher closure and a sliding groove alignment. Specifically, the pusher drives the second jaw to slide within a groove in the first jaw. When it reaches its termination position, the pusher firmly holds the movable jaw in that position, achieving alignment between the second and first jaws. However, the sliding groove alignment method is significantly affected by tissue thickness. The thicker the tissue between the first and second jaws, the greater the reaction force exerted by the tissue on the second jaw. Since the two jaws can move axially relative to each other, a greater reaction force leads to a larger alignment error. This frequently results in inaccurate alignment of the staple grooves and staples in the two jaws when anastomosing thick tissue, leading to poor staple formation, inadequate anastomosis closure, and clinical problems such as bleeding and leakage during surgery. Summary of the Invention

[0004] The main technical problem solved by this invention is that existing surgical instruments cannot guarantee alignment accuracy while exerting a large clamping force on the tissue.

[0005] In a first aspect, one embodiment provides a surgical instrument, comprising:

[0006] Handle assembly;

[0007] A barrel assembly, the proximal end of which is connected to the handle assembly, the barrel assembly including a transmission mechanism, a first pusher, a second pusher, and a contact member, the contact member being disposed on the first pusher, the transmission mechanism being connected to the first pusher; the second pusher is used to push the pusher of the staple cartridge assembly to move;

[0008] The barrel assembly is connected to the actuator assembly at its distal end. The actuator assembly includes a first jaw and a second jaw. The proximal end of the first jaw is provided with a fixed rotating shaft, and the proximal end of the second jaw is rotatably connected to the fixed rotating shaft. The first pusher has a first mating surface, and the second jaw has a second mating surface. The transmission mechanism can drive the first pusher to move toward the distal end of the actuator assembly, so as to drive the first mating surface to press the second mating surface, thereby driving the second jaw to rotate only around the fixed rotating shaft in a first direction, so that the distal end of the second jaw closes with the distal end of the first jaw.

[0009] The second jaw has a mating portion, and the contact member is movably engaged with the mating portion; the transmission mechanism can drive the first push member to move away from the actuator assembly, so as to drive the contact member to squeeze the mating portion, thereby driving the second jaw to rotate relative to the first jaw in a second direction, so that the distal end of the second jaw opens with the distal end of the first jaw.

[0010] In one embodiment, the proximal end of the first jaw has a base, the base having a raised support sidewall, and at least one end of the fixed pivot is connected to the support sidewall.

[0011] In one embodiment, the base is provided with a support seat, the support seat is disposed opposite to the support sidewall, one end of the fixed rotating shaft is connected to the support sidewall, and the other end is connected to the support seat.

[0012] In one embodiment, the fixed rotating shaft has a first end and a second end. The first end of the fixed rotating shaft is an optical axis, and the second end of the fixed rotating shaft has a plurality of protruding mating teeth, which are arranged at intervals along the circumference of the fixed rotating shaft. The first end of the fixed rotating shaft is connected to the supporting sidewall, and the second end of the fixed rotating shaft is connected to the supporting base.

[0013] In one embodiment, the fixed rotating shaft includes a first stepped portion, a second stepped portion, and a third stepped portion with successively decreasing diameters. The first stepped portion has a clearance fit or transition fit with the support sidewall, the second stepped portion has a clearance fit with the second jaw, and the third stepped portion has an interference fit with the support seat.

[0014] In one embodiment, the base has two opposing support sidewalls, and two support seats and two fixed rotating shafts are provided between the two support sidewalls. The two support seats are respectively disposed opposite to the two support sidewalls to form an installation gap between each support seat and the opposing support sidewall. The two fixed rotating shafts are respectively located within the two installation gaps and are coaxially disposed. One end of each fixed rotating shaft is connected to the support seat, and the other end is connected to the opposing support sidewall of the support seat.

[0015] In one embodiment, a movement gap is formed between the two support seats.

[0016] In one embodiment, the second mating surface forms an inclined angle with the axis of the first pusher, and the distance between the second mating surface and the axis of the first pusher gradually increases along the direction from the proximal end of the second mating surface to the distal end of the second mating surface.

[0017] In one embodiment, the second jaw has at least two second mating surfaces arranged sequentially from the proximal end of the second jaw to the distal end of the second jaw, and the angle between the second mating surfaces and the axis of the first pusher gradually increases along the direction from the proximal end of the second jaw to the distal end of the second jaw.

[0018] In one embodiment, the first mating surface is located on the inner wall of the first pusher, and the second mating surface is located on the outer wall of the second jaw, with the first mating surface and the second mating surface being disposed opposite to each other.

[0019] In one embodiment, the first mating surface is a planar structure, and the load portion when the first mating surface presses against the second mating surface is a load line or a load surface.

[0020] In one embodiment, the first pusher is a hollow sleeve having a thickened portion and a surrounding portion, the thickened portion and the surrounding portion enclosing each other circumferentially around the actuator assembly, the wall thickness of the thickened portion being greater than the wall thickness of the surrounding portion, and the first mating surface being located on the thickened portion.

[0021] In one embodiment, the contact member has a cam-shaped first driving surface on the side facing the mating portion, the mating portion is configured as a driving groove, the driving groove has an arc-shaped second driving surface, and the first driving surface is used to contact and press the second driving surface to drive the second jaw to rotate relative to the first jaw in a second direction.

[0022] In one embodiment, the second driving surface includes a proximal terminating segment, a contact segment, and a distal terminating segment sequentially arranged from the proximal end to the distal end of the second driving surface; when the first jaw and the second jaw are closed, there is a gap between the contact member and the distal terminating segment; when the pusher moves away from the actuator assembly, it drives the contact member to move from the distal end to the proximal end of the second driving surface; when the contact member moves to the contact segment, the contact member contacts the contact segment to drive the second jaw to rotate relative to the first jaw in a second direction; when the contact member moves to the distal terminating segment, the contact member contacts the distal terminating segment to keep the first jaw and the second jaw in a fully open state.

[0023] In one embodiment, the contact element is welded or bonded to the pusher element.

[0024] Secondly, one embodiment provides a surgical instrument, comprising:

[0025] Handle assembly;

[0026] A barrel assembly, the proximal end of which is connected to the handle assembly, the barrel assembly including a transmission mechanism, a first pusher and a second pusher, the transmission mechanism being connected to the first pusher; the second pusher being used to push the pusher of the staple cartridge assembly.

[0027] The actuator assembly includes a first jaw and a second jaw. The proximal end of the first jaw is provided with a fixed pivot, and the proximal end of the second jaw is rotatably connected to the fixed pivot. The transmission mechanism can drive the first pusher to move toward the distal end of the actuator assembly, so as to drive the second jaw to rotate only around the fixed pivot in a first direction, so as to close the distal end of the second jaw with the distal end of the first jaw.

[0028] In one embodiment, the proximal end of the first jaw has a base, the base having a raised support sidewall, and at least one end of the fixed pivot is connected to the support sidewall.

[0029] In one embodiment, the base is provided with a support seat, the support seat is disposed opposite to the support sidewall, one end of the fixed rotating shaft is connected to the support sidewall, and the other end is connected to the support seat.

[0030] In one embodiment, the fixed rotating shaft has a first end and a second end. The first end of the fixed rotating shaft is an optical axis, and the second end of the fixed rotating shaft has a plurality of protruding mating teeth, which are arranged at intervals along the circumference of the fixed rotating shaft. The first end of the fixed rotating shaft is connected to the supporting sidewall, and the second end of the fixed rotating shaft is connected to the supporting base.

[0031] In one embodiment, the fixed rotating shaft includes a first stepped portion, a second stepped portion, and a third stepped portion with successively decreasing diameters. The first stepped portion has a clearance fit or transition fit with the support sidewall, the second stepped portion has a clearance fit with the second jaw, and the third stepped portion has an interference fit with the support seat.

[0032] In one embodiment, the base has two opposing support sidewalls, and two support seats and two fixed rotating shafts are provided between the two support sidewalls. The two support seats are respectively disposed opposite to the two support sidewalls to form an installation gap between each support seat and the opposing support sidewall. The two fixed rotating shafts are respectively located within the two installation gaps and are coaxially disposed. One end of each fixed rotating shaft is connected to the support seat, and the other end is connected to the opposing support sidewall of the support seat.

[0033] In one embodiment, a movement gap is formed between the two support seats.

[0034] In one embodiment, the base has two opposing support sidewalls, the fixed pivot is disposed between the two support sidewalls, and both ends of the fixed pivot are respectively connected to the two support sidewalls.

[0035] In one embodiment, the proximal end of the first jaw has a base, the base is provided with at least two support seats, the fixed rotating shaft is disposed between two adjacent support seats, and the two ends of the fixed rotating shaft are respectively connected to the two adjacent support seats.

[0036] In one embodiment, the support is connected to the base.

[0037] In one embodiment, the support base and the base are an integral structure.

[0038] In one embodiment, the proximal end of the second jaw has a through connection hole, through which the fixed pivot passes and rotatably engages with the connection hole.

[0039] In one embodiment, when the transmission mechanism drives the first pusher to move toward the distal end of the actuator assembly, the proximal ends of the first jaw and the second jaw are at least partially fitted inside the first pusher, so that the first pusher applies a closing force to the first jaw and the second jaw.

[0040] In one embodiment, the first pusher is a hollow sleeve.

[0041] In one embodiment, at least a portion of the second pusher is located at the distal end of the first pusher.

[0042] In one embodiment, the second pusher includes a cutting edge for cutting tissue.

[0043] In one embodiment, the second pusher is used to contact a cutting blade disposed on the staple cartridge assembly to drive the cutting blade toward the distal end of the actuator assembly.

[0044] Thirdly, one embodiment provides a surgical instrument, comprising:

[0045] Handle assembly;

[0046] A barrel assembly, the proximal end of which is connected to the handle assembly, the barrel assembly including a transmission mechanism, a first pusher, and a second pusher, the transmission mechanism being connected to the first pusher; the second pusher being used to move the pusher of the staple cartridge assembly; and

[0047] An actuator assembly is provided, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the proximal ends of the first jaw and the second jaw are rotatably connected; a first pusher has a first mating surface, the second jaw has a second mating surface, and a transmission mechanism is capable of driving the first pusher to move toward the distal end of the actuator assembly, so as to drive the first mating surface to press the second mating surface, thereby driving the second jaw to rotate relative to the first jaw in a first direction, so that the distal end of the second jaw closes with the distal end of the first jaw.

[0048] In one embodiment, the second mating surface forms an inclined angle with the axis of the first pusher, and the distance between the second mating surface and the axis of the first pusher gradually increases along the direction from the proximal end of the second mating surface to the distal end of the second mating surface.

[0049] In one embodiment, the second jaw has at least two second mating surfaces arranged sequentially from the proximal end of the second jaw to the distal end of the second jaw, and the angle between the second mating surfaces and the axis of the first pusher gradually increases along the direction from the proximal end of the second jaw to the distal end of the second jaw.

[0050] In one embodiment, the first mating surface is located on the inner wall of the first pusher, and the second mating surface is located on the outer wall of the second jaw, with the first mating surface and the second mating surface being disposed opposite to each other.

[0051] In one embodiment, the first mating surface is a planar structure, and the load portion when the first mating surface presses against the second mating surface is a load line or a load surface.

[0052] In one embodiment, the first pusher is a hollow sleeve having a thickened portion and a surrounding portion, the thickened portion and the surrounding portion enclosing each other circumferentially around the actuator assembly, the wall thickness of the thickened portion being greater than the wall thickness of the surrounding portion, and the first mating surface being located on the thickened portion.

[0053] Fourthly, one embodiment provides a surgical instrument, comprising:

[0054] Handle assembly;

[0055] A barrel assembly, the proximal end of which is connected to the handle assembly, the barrel assembly including a pusher, a transmission mechanism, and a contact member, the contact member being disposed on the pusher, and the transmission mechanism being connected to the pusher; and

[0056] An actuator assembly is provided, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the proximal ends of the first jaw and the second jaw are rotatably connected; the second jaw has a mating portion, and a contact member is movably engaged with the mating portion; a transmission mechanism is capable of driving the pusher member to move away from the actuator assembly, thereby causing the contact member to press the mating portion, thereby driving the second jaw to rotate relative to the first jaw in a second direction, so that the distal end of the second jaw opens with the distal end of the first jaw.

[0057] In one embodiment, the contact member has a cam-shaped first driving surface on the side facing the mating portion, the mating portion is configured as a driving groove, the driving groove has an arc-shaped second driving surface, and the first driving surface is used to contact and press the second driving surface to drive the second jaw to rotate relative to the first jaw in a second direction.

[0058] In one embodiment, the second driving surface includes a proximal terminating segment, a contact segment, and a distal terminating segment sequentially arranged from the proximal end to the distal end of the second driving surface; when the first jaw and the second jaw are closed, there is a gap between the contact member and the distal terminating segment; when the pusher moves away from the actuator assembly, it drives the contact member to move from the distal end to the proximal end of the second driving surface; when the contact member moves to the contact segment, the contact member contacts the contact segment to drive the second jaw to rotate relative to the first jaw in a second direction; when the contact member moves to the distal terminating segment, the contact member contacts the distal terminating segment to keep the first jaw and the second jaw in a fully open state.

[0059] In one embodiment, the contact member includes a support portion and at least one driving portion, the support portion being disposed on the pusher member, the driving portion being connected to the support portion, and the first driving surface being located on the side of the driving portion facing the driving groove.

[0060] In one embodiment, there are two driving units connected to opposite sides of the bearing unit. The second jaw has two opposing driving slots, and the two driving units are respectively in movable engagement with the two driving slots.

[0061] In one embodiment, the contact element is welded or bonded to the pusher element.

[0062] The surgical instruments according to the above embodiments, by employing a first pusher to drive the second jaw to rotate only around the fixed axis in a first direction, so that the distal end of the second jaw closes with the distal end of the first jaw, ensures alignment accuracy while providing a large clamping force on the tissue. This reduces the probability of problems such as poor anastomosis closure, bleeding during surgery, and leakage.

[0063] Since the first mating surface of the first pusher presses the second mating surface of the second jaw, causing the second jaw to rotate only around the fixed axis in the first direction, it is beneficial to increase the area of ​​the load portion between the first pusher and the second jaw, thereby increasing the stability when the first pusher drives the second jaw to rotate, and also improving the service life of the first pusher and the second jaw.

[0064] By adding contact elements and mating parts, when the transmission mechanism drives the first pusher to move away from the actuator assembly, the contact elements can squeeze the mating parts, thereby opening the first and second jaws, providing a convenient and reliable jaw opening method. Attached Figure Description

[0065] Figure 1 This is a schematic diagram of the structure of a surgical instrument in one embodiment of this application;

[0066] Figure 2 This is a schematic diagram of the actuator assembly in a closed state in one embodiment of this application;

[0067] Figure 3 This is a cross-sectional view of the actuator assembly in a closed state in one embodiment of this application;

[0068] Figure 4 This is an exploded view of the actuator component in one embodiment of this application;

[0069] Figure 5 This is a three-dimensional structural diagram of the first jaw in one embodiment of this application;

[0070] Figure 6 This is a schematic diagram of the structure of the fixed rotating shaft in one embodiment of this application;

[0071] Figure 7 This is a schematic diagram of the engagement between a closed actuator assembly and a first pusher in one embodiment of this application;

[0072] Figure 8 This is a schematic diagram showing the engagement of the opened actuator assembly and the first pusher in one embodiment of this application;

[0073] Figure 9 This is a cross-sectional view of the actuator assembly and the first pusher in one embodiment of this application;

[0074] Figure 10 This is a three-dimensional structural schematic diagram of the actuator assembly in one embodiment of this application;

[0075] Figure 11 This is a schematic diagram of the second jaw from a stereoscopic perspective in one embodiment of this application;

[0076] Figure 12 This is a schematic diagram of the structure of the first pusher in one embodiment of this application;

[0077] Figure 13 This is a schematic diagram of the structure in one embodiment of the present application where the contact element drives the second jaw to open;

[0078] Figure 14 This is a schematic diagram of the contact element cooperating with the drive groove in one embodiment of this application;

[0079] Figure 15 This is a schematic diagram of the structure of the second jaw from a side view in one embodiment of this application;

[0080] Figure 16 For this application Figure 15 Enlarged view of point A in the middle;

[0081] Figure 17 This is a schematic diagram of the contact element in one embodiment of this application;

[0082] Reference numerals: 100, Handle assembly; 110, Fixed handle; 120, Movable handle; 200, Barrel assembly; 210, First pusher; 211, First mating surface; 212, Thickened portion; 213, Surrounding portion; 220, Contact element; 221, Bearing portion; 222, Drive portion; 223, First drive surface; 300, Actuator assembly; 310, First jaws; 311, Base; 3111, Supporting sidewall; 31 2. Support base; 320. Second jaw; 321. Second mating surface; 322. Mating part; 3221. Drive groove; 3222. Second drive surface; 32221. Proximal termination section; 32222. Contact section; 32223. Distal termination section; 323. Transition surface; 324. Connecting hole; 330. Fixed rotating shaft; 331. First stepped part; 332. Second stepped part; 333. Third stepped part; 334. Mating tooth. Detailed Implementation

[0083] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0084] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0085] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0086] Anastomosing devices are commonly used surgical instruments in minimally invasive surgery. Please refer to [link / reference]. Figure 1 The stapler typically includes a handle assembly 100, a barrel assembly 200, and an actuator assembly 300. The barrel assembly 200 includes a closing drive chain and a firing drive chain. The handle assembly 100 includes a fixed handle 110 and at least one movable handle 120.

[0087] When operating the stapler, the operator can hold the fixed handle 110 and insert the actuator assembly 300 into the lesion site inside the body through the slender barrel assembly 200. Then, the movable handle 120 triggers the closing drive chain, causing the jaws of the actuator assembly 300 to close and clamp at a specific position near the lesion site. Next, the movable handle 120 triggers the firing drive chain, causing the cutting blade within the actuator assembly 300 to remove tissue, and simultaneously suturing the tissue using the suture staples within the actuator assembly 300.

[0088] In this embodiment, "distal" refers to the end of the surgical instrument furthest from the operator, and "proximal" refers to the end of the surgical instrument closest to the operator. In this embodiment, "axial" refers to the direction of the line connecting the center of the distal end and the center of the proximal end, and "radial" refers to the direction perpendicular to the axial direction.

[0089] This embodiment provides a surgical instrument.

[0090] Please refer to Figure 1-17 The surgical instrument includes a handle assembly 100, a barrel assembly 200, and an actuator assembly 300.

[0091] The proximal end of the barrel assembly 200 is connected to the handle assembly 100. The barrel assembly 200 includes a transmission mechanism, a first pusher 210, a second pusher, and a contact member 220. The contact member 220 is disposed on the first pusher 210, and the transmission mechanism is connected to the first pusher 210. The second pusher is used to push the pusher of the staple cartridge assembly.

[0092] The distal end of the barrel assembly 200 is connected to the actuator assembly 300, which includes a first jaw 310 and a second jaw 320. The proximal end of the first jaw 310 is provided with a fixed rotating shaft 330, and the proximal end of the second jaw 320 is rotatably connected to the fixed rotating shaft 330. The first pusher 210 has a first mating surface 211, and the second jaw 320 has a second mating surface 321. The transmission mechanism can drive the first pusher 210 to move toward the distal end of the actuator assembly 300, so as to cause the first mating surface 211 to press against the second mating surface 321, thereby driving the second jaw 320 to rotate only around the fixed rotating shaft 330 in a first direction, so that the distal end of the second jaw 320 closes with the distal end of the first jaw 310.

[0093] The second jaw 320 has a mating portion 322, and the contact member 220 is movably engaged with the mating portion 322. The transmission mechanism can drive the first pusher 210 to move away from the actuator assembly 300, so as to drive the contact member 220 to press the mating portion 322, thereby driving the second jaw 320 to rotate relative to the first jaw 310 in a second direction, so that the distal end of the second jaw 320 opens with the distal end of the first jaw 310.

[0094] It should be noted that the transmission mechanism in this embodiment can be the outer tube of the barrel assembly 200, a moving part inside the barrel assembly 200, or other structures capable of driving the first pusher 210 to move between the distal and proximal ends. In this embodiment, the first direction and the second direction are two opposite directions in a plane. For example, when the first direction is clockwise, the second direction is counterclockwise, and vice versa.

[0095] The advantages of the surgical instruments in this embodiment are as follows: First, because the first pusher 210 drives the second jaw 320 to rotate only around the fixed pivot 330 in the first direction, so that the distal end of the second jaw 320 closes with the distal end of the first jaw 310, it ensures alignment accuracy while maintaining a large clamping force on the tissue. This reduces the probability of problems such as poor anastomosis closure, bleeding during surgery, and leakage.

[0096] Secondly, since the first mating surface 211 of the first pusher 210 presses the second mating surface 321 of the second jaw 320 to drive the second jaw 320 to rotate only around the fixed rotating shaft 330 in the first direction, it is beneficial to increase the area of ​​the load portion between the first pusher 210 and the second jaw 320, thereby increasing the stability when the first pusher 210 drives the second jaw 320 to rotate, and also helping to improve the service life of the first pusher 210 and the second jaw 320.

[0097] Thirdly, due to the addition of the contact member 220 and the mating part 322, when the transmission mechanism drives the first push member 210 to move away from the actuator assembly 300, the contact member 220 can squeeze the mating part 322 and drive the first jaw 310 and the second jaw 320 to open, providing a convenient and reliable jaw opening method.

[0098] On the other hand, this embodiment also provides a surgical instrument.

[0099] Please refer to Figure 1-6 The surgical instrument includes a handle assembly 100, a barrel assembly 200, and an actuator assembly 300.

[0100] The proximal end of the barrel assembly 200 is connected to the handle assembly 100. The barrel assembly 200 includes a transmission mechanism, a first pusher 210, and a second pusher. The transmission mechanism is connected to the first pusher 210. The second pusher is used to push the pusher of the staple cartridge assembly.

[0101] The distal end of the barrel assembly 200 is connected to the actuator assembly 300, which includes a first jaw 310 and a second jaw 320. The proximal end of the first jaw 310 is provided with a fixed pivot 330, and the proximal end of the second jaw 320 is rotatably connected to the fixed pivot 330. A transmission mechanism can drive the first pusher 210 to move toward the distal end of the actuator assembly 300, thereby causing the second jaw 320 to rotate only around the fixed pivot 330 in a first direction, so that the distal end of the second jaw 320 closes with the distal end of the first jaw 310.

[0102] Because the first pusher 210 drives the second jaw 320 to rotate only around the fixed pivot 330 in the first direction, so that the distal end of the second jaw 320 closes with the distal end of the first jaw 310, it ensures alignment accuracy while providing a large clamping force on the tissue. This reduces the probability of problems such as poor anastomosis closure, bleeding during surgery, and leakage.

[0103] Please refer to Figure 2-5 In one embodiment, the proximal end of the first jaw 310 has a base 311, the base 311 having a protruding support sidewall 3111, and at least one end of the fixed rotating shaft 330 is connected to the support sidewall 3111. By utilizing the protruding support sidewall 3111 on the base 311 to support one end of the fixed rotating shaft 330, the structural features of the base 311 are rationally utilized, the space utilization rate of the base 311 is improved, and the volume of the first jaw 310 is reduced.

[0104] Please refer to Figure 2-5 In one embodiment, the support base 312 is disposed opposite to the support sidewall 3111, one end of the fixed rotating shaft 330 is connected to the support sidewall 3111, and the other end is connected to the support base 312.

[0105] Stable support for both ends of the fixed rotating shaft 330 is achieved by the relatively arranged support sidewalls 3111 and support base 312. Specifically, the support base 312 can be connected to the base 311, or the support base 312 can be an integral structure with the base 311.

[0106] Please refer to Figure 4-6 In one embodiment, the fixed rotating shaft 330 has a first end and a second end. The first end of the fixed rotating shaft 330 is an optical axis, and the second end of the fixed rotating shaft 330 has a plurality of protruding mating teeth 334, which are arranged at intervals along the circumference of the fixed rotating shaft 330. The first end of the fixed rotating shaft 330 is connected to the support sidewall 3111, and the second end of the fixed rotating shaft 330 is connected to the support base 312.

[0107] Because of the addition of the mating teeth 334, when the second end of the fixed rotating shaft 330 is normally in an interference fit with the support 312, on the one hand, the mating teeth 334 are easy to deform, thus facilitating assembly. On the other hand, the mating teeth 334 can ensure the firmness of the assembly and prevent the assembly between the fixed rotating shaft 330 and the support 312 from failing due to fretting wear.

[0108] Please refer to Figure 4-6In one embodiment, the fixed rotating shaft 330 includes a first stepped portion 331, a second stepped portion 332, and a third stepped portion 333 with successively decreasing diameters. The first stepped portion 331 is clearance-fitted or transition-fitted with the support sidewall 3111, the second stepped portion 332 is clearance-fitted with the second jaw 320, and the third stepped portion 333 is interference-fitted with the support seat 312.

[0109] After the first jaw 310 and the second jaw 320 are assembled via the fixed pivot 330, the first stepped portion 331 is clearance-fitted or transition-fitted with the support sidewall 3111 to ensure the fit accuracy as much as possible. The second stepped portion 332 is clearance-fitted with the second jaw 320 to ensure that the second jaw 320 can rotate freely within a certain angle around the fixed pivot 330. The third stepped portion 333 is interference-fitted with the support base 312 to achieve the fixed installation of the fixed pivot 330 on the first jaw 310.

[0110] Please refer to Figure 2-5 In one embodiment, the base 311 has two opposing support sidewalls 3111, with two support seats 312 and two fixed rotating shafts 330 disposed between the two support sidewalls 3111. The two support seats 312 are respectively disposed opposite to the two support sidewalls 3111, forming an installation gap between each support seat 312 and the opposing support sidewall 3111. The two fixed rotating shafts 330 are respectively located within the two installation gaps and are coaxially disposed. One end of the fixed rotating shaft 330 is connected to the support seat 312, and the other end is connected to the opposing support sidewall 3111 of the support seat 312.

[0111] The two sides of the second jaw 320 can be rotatably connected to two coaxial fixed rotating shafts 330, so that the second jaw 320 is less likely to wobble when rotating around the fixed rotating shafts 330, thereby improving the stability of the second jaw 320 when rotating.

[0112] Please refer to Figure 2-5 In one embodiment, a movement gap is formed between the two support seats 312.

[0113] The movement gap allows various moving parts to pass through, ensuring that the support 312 does not block the movement path between the far and near ends of the actuator assembly 300, leaving design space for the installation and movement of moving parts on the actuator assembly 300.

[0114] Please refer to Figure 2-5In another embodiment, the base 311 has two opposing support sidewalls 3111, and the fixing shaft 330 is disposed between the two support sidewalls 3111, with both ends of the fixing shaft 330 connected to the two support sidewalls 3111 respectively. This provides an alternative solution that does not rely on the support base 312, but only on the support sidewalls 3111 to mount the fixing shaft 330 on the base 311.

[0115] In one embodiment, the proximal end of the first jaw 310 has a base 311, on which at least two support seats 312 are provided. A fixing shaft 330 is disposed between two adjacent support seats 312, and both ends of the fixing shaft 330 are respectively connected to the two adjacent support seats 312. This provides an alternative solution that does not rely on the support sidewall 3111, but only on the support seats 312 to install the fixing shaft 330 on the base 311.

[0116] In one embodiment, the proximal end of the second jaw 320 has a through connecting hole 324, through which the fixed rotating shaft 330 passes and rotatably engages. The engagement of the connecting hole 324 with the fixed rotating shaft 330 achieves a rotatable connection between the second jaw 320 and the fixed rotating shaft 330.

[0117] Please refer to Figure 1 and 7 -9. In one embodiment, when the transmission mechanism drives the first pusher 210 to move toward the distal end of the actuator assembly 300, the proximal ends of the first jaw 310 and the second jaw 320 are at least partially fitted inside the first pusher 210, so as to enable the first pusher 210 to apply a closing force to the first jaw 310 and the second jaw 320.

[0118] Since the proximal ends of the first jaw 310 and the second jaw 320 are at least partially fitted within the first pusher 210, it is advantageous for the first pusher 210 to apply a larger closing force to the first jaw 310 and the second jaw 320. Specifically, the first pusher 210 can be a tubular structure with an annular cross-section. It is understood that the cross-sectional shape of the first pusher 210 can also be simply replaced with a C-shape or other suitable shape.

[0119] Please refer to Figure 12 In one embodiment, the first pusher 210 is a hollow sleeve.

[0120] In one embodiment, at least a portion of the second pusher is located at the distal end of the first pusher 210.

[0121] In one embodiment, the second pusher includes a cutting edge for cutting tissue. That is, the cutting edge and the second pusher are an integral structure.

[0122] In one embodiment, the second pusher contacts a cutting blade disposed on the staple cartridge assembly to drive the cutting blade toward the distal end of the actuator assembly 300. The cutting blade can be replaced simultaneously with the staple cartridge assembly, thereby avoiding the risk of decreased surgical quality due to reduced cutting blade sharpness.

[0123] On the other hand, this embodiment also provides a surgical instrument.

[0124] Please refer to Figure 1 and 7 -12, the surgical instrument includes a handle assembly 100, a barrel assembly 200, and an actuator assembly 300.

[0125] The proximal end of the barrel assembly 200 is connected to the handle assembly 100. The barrel assembly 200 includes a transmission mechanism, a first pusher 210, and a second pusher. The transmission mechanism is connected to the first pusher 210. The second pusher is used to push the pusher of the staple cartridge assembly.

[0126] The distal end of the barrel assembly 200 is connected to the actuator assembly 300, which includes a first jaw 310 and a second jaw 320. The proximal ends of the first jaw 310 and the second jaw 320 are rotatably connected. The first pusher 210 has a first mating surface 211, and the second jaw 320 has a second mating surface 321. A transmission mechanism can drive the first pusher 210 to move toward the distal end of the actuator assembly 300, so as to cause the first mating surface 211 to press against the second mating surface 321, thereby driving the second jaw 320 to rotate relative to the first jaw 310 in a first direction, so that the distal end of the second jaw 320 closes with the distal end of the first jaw 310.

[0127] Since the first mating surface 211 of the first pusher 210 presses the second mating surface 321 of the second jaw 320, thereby driving the second jaw 320 to rotate only around the fixed rotating shaft 330 in the first direction, it is beneficial to increase the area of ​​the load portion between the first pusher 210 and the second jaw 320, which is beneficial to increase the stability when the first pusher 210 drives the second jaw 320 to rotate, and also beneficial to improve the service life of the first pusher 210 and the second jaw 320.

[0128] Please refer to Figure 9-11 In one embodiment, the second mating surface 321 forms an inclined angle with the axis of the first pusher 210, and the distance between the second mating surface 321 and the axis of the first pusher 210 gradually increases in the direction from the proximal end of the second mating surface 321 to the distal end of the second mating surface 321.

[0129] The angle design between the second mating surface 321 and the first pusher 210 allows the first pusher 210 to press against the second mating surface 321, thereby causing the second jaws 320 to gradually close. It should be noted that the axis of the first pusher 210 is the line connecting the center of its distal end and the center of its proximal end.

[0130] Please refer to Figure 9-11 In one embodiment, the second jaw 320 has at least two second mating surfaces 321 arranged sequentially from the proximal end of the second jaw 320 to the distal end of the second jaw 320, and the included angle between the second mating surface 321 and the axis of the first pusher 210 gradually increases in the direction from the proximal end of the second jaw 320 to the distal end of the second jaw 320.

[0131] By providing at least two second mating surfaces 321, the action of the first pusher 210 pushing the second jaw 320 to close is divided into at least two segments. Specifically, the two second mating surfaces 321 can be connected by a transition surface 323 parallel to the axis of the first pusher 210.

[0132] Please refer to Figure 9-12 In one embodiment, the first mating surface 211 is located on the inner wall of the first pusher 210, and the second mating surface 321 is located on the outer wall of the second jaw 320, with the first mating surface 211 and the second mating surface 321 arranged opposite to each other. The relative arrangement of the first mating surface 211 and the second mating surface 321 is achieved through a reasonable positional layout.

[0133] Please refer to Figure 9-12 In one embodiment, the first mating surface 211 is a planar structure, and the load portion when the first mating surface 211 presses against the second mating surface 321 is a load line or a load surface.

[0134] Since the load portion is a load line or load surface, compared with the existing scheme where the load is concentrated on one or more points, it is beneficial to reduce the load intensity per unit area on the load portion, thereby making the load portion of the first pusher 210 and the second jaw 320 less prone to deformation and damage, which is beneficial to improving the service life of the first pusher 210 and the second jaw 320.

[0135] Please refer to Figure 12 In one embodiment, the first pusher 210 is a hollow sleeve having a thickened portion 212 and a surrounding portion 213, which surround the actuator assembly 300 circumferentially. The wall thickness of the thickened portion 212 is greater than the wall thickness of the surrounding portion 213, and the first mating surface 211 is located on the thickened portion 212.

[0136] Since the load portion of the first pusher 210 is located on the first mating surface 211, when the first mating surface 211 is set in the thickened portion 212, the structure of the thickened portion 212 is stronger and less prone to deformation under external load, which helps to ensure the stability of the movement of the first pusher 210 and improve the service life of the first pusher 210.

[0137] On the other hand, this embodiment also provides a surgical instrument.

[0138] Please refer to Figure 1 and 13 -17, the surgical instrument includes a handle assembly 100, a barrel assembly 200, and an actuator assembly 300.

[0139] The proximal end of the barrel assembly 200 is connected to the handle assembly 100. The barrel assembly 200 includes a pusher 210, a transmission mechanism, and a contact 220. The contact 220 is disposed on the pusher 210, and the transmission mechanism is connected to the pusher 210.

[0140] The distal end of the barrel assembly 200 is connected to the actuator assembly 300, which includes a first jaw 310 and a second jaw 320. The proximal ends of the first jaw 310 and the second jaw 320 are rotatably connected. The second jaw 320 has a mating portion 322, and a contact member 220 is movably engaged with the mating portion 322. A transmission mechanism can drive a pusher 210 to move away from the actuator assembly 300, thereby causing the contact member 220 to press against the mating portion 322, which in turn drives the second jaw 320 to rotate relative to the first jaw 310 in a second direction, so that the distal end of the second jaw 320 opens from the distal end of the first jaw 310.

[0141] By adding the contact element 220 and the mating part 322, when the transmission mechanism drives the first pusher 210 to move away from the actuator assembly 300, the contact element 220 can squeeze the mating part 322, thereby driving the first jaw 310 and the second jaw 320 to open, providing a convenient and reliable jaw opening method.

[0142] It should be noted that the pusher 210 in this embodiment can be understood as the "first pusher 210" in the above embodiments. Therefore, the pusher 210 in this embodiment and the first pusher 210 mentioned above are referred to by the same reference numerals. Of course, the pusher 210 in this embodiment can also be understood as not limited to the "first pusher 210" and "second pusher" mentioned above.

[0143] Please refer to Figure 14In one embodiment, the contact member 220 has a cam-shaped first driving surface 223 on the side facing the mating part 322, the mating part 322 is configured as a driving groove 3221, the driving groove 3221 has an arc-shaped second driving surface 3222, the first driving surface 223 is used to contact and press the second driving surface 3222 to drive the second jaw 320 to rotate relative to the first jaw 310 in a second direction.

[0144] The opening of the second jaw 320 is achieved through a cam-shaped contact 220 and a drive groove 3221 with an arc-shaped second drive surface 3222, resulting in a simple structure and high stability. In other embodiments, the contact 220 can also be a slider, and the mating part 322 can also be an arc-shaped groove that mates with the slider, allowing the second jaw 320 to open by sliding the slider within the groove.

[0145] Please refer to Figure 14-17 In one embodiment, the second drive surface 3222 includes a proximal termination segment 32221, a contact segment 32222, and a distal termination segment 32223 sequentially disposed from the proximal end to the distal end of the second drive surface 3222. When the first jaw 310 and the second jaw 320 are closed, there is a gap between the contact member 220 and the distal termination segment 32223. When the pusher 210 moves away from the actuator assembly 300, it drives the contact member 220 to move from the distal end to the proximal end of the second drive surface 3222. When the contact member 220 moves to the contact segment 32222, the contact member 220 contacts the contact segment 32222 to drive the second jaw 320 to rotate relative to the first jaw 310 in a second direction. When the contact member 220 moves to the distal termination segment 32223, the contact member 220 contacts the distal termination segment 32223 to keep the first jaw 310 and the second jaw 320 in a fully open state.

[0146] Since the contact element 220 does not contact the proximal termination segment 32221, after the first jaw 310 and the second jaw 320 are closed, only one force point of the pusher element 210 is pressed against the second jaw 320. When the contact element 220 moves to contact the contact segment 32222, it can drive the second jaw 320 to gradually open. When the contact element 220 moves to contact the distal termination segment 32223, the first jaw 310 and the second jaw 320 are fully opened and remain open under the interaction force between the contact element 220 and the distal termination segment 32223.

[0147] Please refer to Figure 14-17 In one embodiment, the contact member 220 includes a support portion 221 and at least one drive portion 222. The support portion 221 is disposed on the pusher 210, and the drive portion 222 is connected to the support portion 221. A first drive surface 223 is located on the side of the drive portion 222 facing the drive groove 3221.

[0148] The drive unit 222 is mounted on the pusher 210 via the support portion 221. The drive unit 222 presses against the drive groove 3221 to drive the second jaw 320 to open. Specifically, the contact member 220 is welded or bonded to the pusher 210. For example, the support portion 221 can be welded or bonded to the pusher 210.

[0149] Please refer to Figure 14-17 In one embodiment, there are two drive units 222, which are connected to opposite sides of the support unit 221. The second jaw 320 has two oppositely arranged drive grooves 3221, and the two drive units 222 are respectively in active engagement with the two drive grooves 3221.

[0150] The second jaw 320 is opened by driving the two corresponding drive units 222 and drive grooves 3221, which helps to improve the motion stability of the second jaw 320 when it rotates open, and also helps to reduce the wear of individual drive units 222 and drive grooves 3221, thereby increasing the service life of individual drive units 222 and drive grooves 3221.

[0151] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A surgical instrument, characterized in that, include: Handle assembly; A barrel assembly, the proximal end of which is connected to the handle assembly, the barrel assembly including a transmission mechanism, a first pusher, a second pusher, and a contact member, the contact member being disposed on the first pusher, the transmission mechanism being connected to the first pusher; the second pusher is used to push the pusher of the staple cartridge assembly to move; The barrel assembly is connected to the actuator assembly at its distal end. The actuator assembly includes a first jaw and a second jaw. The proximal end of the first jaw is provided with a fixed rotating shaft, and the proximal end of the second jaw is rotatably connected to the fixed rotating shaft. The first pusher has a first mating surface, and the second jaw has a second mating surface. The transmission mechanism can drive the first pusher to move toward the distal end of the actuator assembly, so as to drive the first mating surface to press the second mating surface, thereby driving the second jaw to rotate only around the fixed rotating shaft in a first direction, so that the distal end of the second jaw closes with the distal end of the first jaw. The second jaw has a mating portion, and the contact member is movably engaged with the mating portion; the transmission mechanism can drive the first push member to move away from the actuator assembly, so as to drive the contact member to squeeze the mating portion, thereby driving the second jaw to rotate relative to the first jaw in a second direction, so that the distal end of the second jaw opens with the distal end of the first jaw; The contact member has a first driving surface, and the mating part has a second driving surface. The first driving surface is used to contact and press the second driving surface to drive the second jaw to rotate in a second direction relative to the first jaw. Both the first driving surface and the second driving surface are located on the side of the fixed rotating shaft away from the second jaw.

2. The surgical instrument as described in claim 1, characterized in that, The proximal end of the first jaw has a base, the base having a raised support sidewall, and at least one end of the fixed pivot is connected to the support sidewall.

3. The surgical instrument as described in claim 2, characterized in that, The base is provided with a support seat, which is disposed opposite to the support sidewall. One end of the fixed rotating shaft is connected to the support sidewall, and the other end is connected to the support seat.

4. The surgical instrument as described in claim 3, characterized in that, The fixed rotating shaft has a first end and a second end. The first end of the fixed rotating shaft is an optical axis, and the second end of the fixed rotating shaft has a plurality of protruding mating teeth. The plurality of mating teeth are arranged at intervals along the circumference of the fixed rotating shaft. The first end of the fixed rotating shaft is connected to the support sidewall, and the second end of the fixed rotating shaft is connected to the support base.

5. The surgical instrument as described in claim 3, characterized in that, The fixed rotating shaft includes a first stepped portion, a second stepped portion, and a third stepped portion with successively decreasing diameters. The first stepped portion has a clearance fit or transition fit with the support sidewall, the second stepped portion has a clearance fit with the second jaw, and the third stepped portion has an interference fit with the support seat.

6. The surgical instrument as described in claim 3, characterized in that, The base has two opposing support sidewalls, and two support seats and two fixed rotating shafts are provided between the two support sidewalls. The two support seats are respectively arranged opposite to the two support sidewalls to form an installation gap between each support seat and the opposing support sidewall. The two fixed rotating shafts are respectively located within the two installation gaps and are coaxially arranged. One end of each fixed rotating shaft is connected to the support seat, and the other end is connected to the opposing support sidewall of the support seat.

7. The surgical instrument as described in claim 6, characterized in that, A movement gap is formed between the two support seats.

8. The surgical instrument as described in claim 1, characterized in that, The second mating surface forms an inclined angle with the axis of the first pusher, and the distance between the second mating surface and the axis of the first pusher gradually increases along the direction from the proximal end of the second mating surface to the distal end of the second mating surface.

9. The surgical instrument as described in claim 8, characterized in that, The second mating surface has at least two second mating surfaces arranged sequentially from the proximal end of the second jaw to the distal end of the second jaw, and the included angle between the second mating surface and the axis of the first pusher gradually increases in the direction from the proximal end of the second jaw to the distal end of the second jaw.

10. The surgical instrument as claimed in claim 1, characterized in that, The first mating surface is located on the inner wall of the first pusher, and the second mating surface is located on the outer wall of the second jaw, with the first mating surface and the second mating surface being disposed opposite to each other.

11. The surgical instrument as claimed in claim 1, characterized in that, The first mating surface is a planar structure, and the load portion when the first mating surface presses against the second mating surface is a load line or a load surface.

12. The surgical instrument as claimed in claim 1, characterized in that, The first pusher is a hollow sleeve with a thickened portion and a surrounding portion. The thickened portion and the surrounding portion enclose each other circumferentially around the actuator assembly. The wall thickness of the thickened portion is greater than the wall thickness of the surrounding portion. The first mating surface is located on the thickened portion.

13. The surgical instrument as claimed in claim 1, characterized in that, The contact member has a cam-shaped first driving surface on the side facing the mating portion, the mating portion is configured as a driving groove, and the driving groove has an arc-shaped second driving surface.

14. The surgical instrument as described in claim 13, characterized in that, The second driving surface includes a proximal terminating segment, a contact segment, and a distal terminating segment arranged sequentially from the proximal end to the distal end of the second driving surface; when the first jaw and the second jaw are closed, there is a gap between the contact member and the distal terminating segment; when the first pushing member moves away from the actuator assembly, it drives the contact member to move from the distal end to the proximal end of the second driving surface; when the contact member moves to the contact segment, the contact member contacts the contact segment to drive the second jaw to rotate relative to the first jaw in a second direction; when the contact member moves to the distal terminating segment, the contact member contacts the distal terminating segment to keep the first jaw and the second jaw in a fully open state.

15. The surgical instrument as claimed in claim 1, characterized in that, The contact element is welded or bonded to the first pusher element.

16. A surgical instrument, characterized in that, include: Handle assembly; A barrel assembly, the proximal end of which is connected to the handle assembly, the barrel assembly including a pusher, a transmission mechanism, and a contact member, the contact member being disposed on the pusher, and the transmission mechanism being connected to the pusher; and An actuator assembly is provided, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the proximal ends of the first jaw and the second jaw are rotatably connected; the second jaw has a mating portion, and a contact member is movably engaged with the mating portion; a transmission mechanism is capable of driving the pusher member to move away from the actuator assembly, thereby driving the contact member to press the mating portion, thereby driving the second jaw to rotate relative to the first jaw in a second direction, so that the distal end of the second jaw opens from the distal end of the first jaw; The proximal end of the first jaw is provided with a fixed pivot, and the proximal end of the second jaw is rotatably connected to the fixed pivot; The contact member has a first driving surface, and the mating part has a second driving surface. The first driving surface is used to contact and press the second driving surface to drive the second jaw to rotate in a second direction relative to the first jaw. Both the first driving surface and the second driving surface are located on the side of the fixed rotating shaft away from the second jaw.

17. The surgical instrument as claimed in claim 16, characterized in that, The contact member has a cam-shaped first driving surface on the side facing the mating portion, the mating portion is configured as a driving groove, and the driving groove has an arc-shaped second driving surface.

18. The surgical instrument as claimed in claim 17, characterized in that, The second driving surface includes a proximal terminating segment, a contact segment, and a distal terminating segment arranged sequentially from the proximal end to the distal end of the second driving surface; when the first jaw and the second jaw are closed, there is a gap between the contact member and the distal terminating segment; when the pusher moves away from the actuator assembly, it drives the contact member to move from the distal end to the proximal end of the second driving surface; when the contact member moves to the contact segment, the contact member contacts the contact segment to drive the second jaw to rotate relative to the first jaw in a second direction; when the contact member moves to the distal terminating segment, the contact member contacts the distal terminating segment to keep the first jaw and the second jaw in a fully open state.

19. The surgical instrument as claimed in claim 17, characterized in that, The contact member includes a support portion and at least one driving portion. The support portion is disposed on the pusher member, and the driving portion is connected to the support portion. The first driving surface is located on the side of the driving portion facing the driving groove.

20. The surgical instrument as claimed in claim 19, characterized in that, There are two drive units, which are connected to opposite sides of the bearing unit. The second jaw has two oppositely arranged drive slots, and the two drive units are respectively movably engaged with the two drive slots.

21. The surgical instrument as claimed in claim 16, characterized in that, The contact element is welded or bonded to the pusher element.

Images