End effectors and surgical instruments

Abstract

The present invention relates to an end effector and a surgical instrument, comprising an anvil assembly, and a nail magazine assembly bracket that moves relative to the anvil assembly to complete the closing or opening of the end effector, the end effector also comprising a cutting guide assembly that is fired by a firing rod, the cutting guide assembly being arranged on one of the anvil assembly and the nail magazine assembly bracket, the other being provided with a guide groove, and the cutting guide assembly comprising a roller that is slidably connected to the guide groove. The present invention arranges the cutting guide assembly on one of the anvil assembly and the nail magazine assembly bracket, the other being provided with a guide groove, the cutting guide assembly is slidably connected to the guide groove through a roller, so that the cutting guide assembly moves along the direction of the guide groove while driving the end effector to stably close or open, thereby ensuring that the closing gap and the height of the nails are consistent.

Description

Technical Field

[0001] This invention relates to an end effector and a surgical instrument, belonging to the field of medical device technology. Background Technology

[0002] In general surgery, surgical instruments are the tools used in medical procedures. Anastomosing devices are a type of surgical instrument commonly used to perform tissue cutting and anastomosis. They are medical devices used to replace manual sutures, and their main working principle is to use titanium staples (suture staples) to cut or anastomose tissue, similar to a stapler. However, existing anastomosing devices have the following drawbacks: When closing the target tissue during surgery, the cantilevered design of the anastomosing device results in poor rigidity. When closing a large target tissue, the anastomosing device is subjected to pressure from other parts of the target tissue, causing deformation and inconsistent closure gaps. This affects the consistency of staple height, thus impacting surgical quality and safety. Summary of the Invention

[0003] The purpose of this invention is to provide an end effector and surgical instrument that can ensure consistent closing gap and nail height.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an end effector, comprising an anvil assembly and a staple cartridge assembly bracket that moves relative to the anvil assembly to close or open the end effector, the end effector further comprising a cutting guide assembly fired by a firing rod, the cutting guide assembly being disposed on one of the anvil assembly and the staple cartridge assembly bracket, the other of the anvil assembly and the staple cartridge assembly bracket being provided with a guide groove, the cutting guide assembly comprising a roller slidably connected to the guide groove, the roller moving along the direction of the guide groove to cause the end effector to close or open.

[0005] Furthermore, the guide groove is arranged in a sloping manner from low to high.

[0006] Furthermore, the guide groove includes a first guide groove, a second guide groove, and a transition section for connecting the first guide groove and the second guide groove.

[0007] Furthermore, there are two guide grooves, which are symmetrically arranged on the anvil assembly or nail cartridge assembly bracket; the cutting guide assembly includes two rollers, each roller being slidably connected to each guide groove.

[0008] Furthermore, guide grooves are provided on both side walls of one of the anvil assembly and the nail cartridge assembly bracket, and a receiving cavity for accommodating the firing rod is provided on the other of the anvil assembly and the nail cartridge assembly bracket, and the cutting guide assembly is disposed on the firing rod.

[0009] Furthermore, the cutting guide assembly also includes a guide seat disposed on the firing rod and threadedly connected to the firing rod, and a connecting rod connected to the guide seat, wherein the roller is connected to the connecting rod.

[0010] Furthermore, a sliding groove is provided on one of the nail anvil assembly and the nail cartridge assembly bracket, and the guide groove is provided on the sliding groove sidewalls on both sides of the sliding groove.

[0011] Furthermore, a cutting guide assembly is provided on another part of the anvil assembly and the nail cartridge assembly bracket. The cutting guide assembly includes a guide base connected to the firing rod, a blade disposed on the guide base, and an extension section connected to the blade. The rollers are disposed on both sides of the extension section.

[0012] Furthermore, the blade has a cutting edge that is positioned opposite to the firing lever.

[0013] The present invention also provides a surgical instrument, including a handle and a working head, characterized in that the working head includes an end effector as described above.

[0014] The beneficial effects of the present invention are as follows: The present invention sets the cutting guide component on one of the anvil component and the staple cartridge component bracket, and the other of the anvil component and the staple cartridge component bracket is provided with a guide groove. The cutting guide component is slidably connected to the guide groove through a roller, so that the cutting guide component moves along the direction of the guide groove while driving the end actuator to close or open stably, thereby ensuring the consistency of the closing gap and the staple height.

[0015] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the surgical instrument shown in Embodiment 1 of the present invention.

[0017] Figure 2 for Figure 1 Exploded view of the mid-end actuator.

[0018] Figure 3 for Figure 1 Exploded view of the anvil assembly.

[0019] Figure 4 for Figure 1 Partial cross-sectional view of the anvil assembly.

[0020] Figure 5 for Figure 1 A schematic diagram of the structure of the staple cartridge component bracket and the staple cartridge component.

[0021] Figure 6 for Figure 1 A schematic diagram of the assembled structure of the firing lever, anvil assembly, staple cartridge assembly bracket, and cutting guide assembly.

[0022] Figure 7 for Figure 6 A sectional view.

[0023] Figure 8 for Figure 6 A cross-sectional view of the central guide component.

[0024] Figure 9 for Figure 1 A schematic diagram of the structure of the guide component.

[0025] Figure 10 for Figure 1 A schematic diagram of the cutting component. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention. The above, below, left, right, front, and rear positional relationships described below are... Figure 1 As a reference point, in Figure 1 The middle arrow 'aa' points in the up-down direction, and the arrow 'bb' points in the forward-backward direction.

[0027] Please see Figure 1 The surgical instrument shown in one embodiment of the present invention is an electrically driven stapler (hereinafter referred to as the stapler), which is used for suturing and cutting tissue. The stapler includes a gun body and a staple cartridge assembly 100 mounted on the gun body. The gun body includes a handle (not shown) and a working head 10. In this embodiment, the handle is a reusable and sterilizable electric handle, which is provided with a quick connector and a signal transmission port. The handle also contains a replaceable battery pack for providing power and a power input device (not shown) for inputting power, which includes a motor. The connection method between the motor and the battery is a conventional design in the prior art, and therefore will not be described in detail here. The working head 10 is driven by the handle to perform actions such as closing, opening, and firing.

[0028] The working head 10 includes a housing 1, a central support (not shown), a transmission assembly (not shown), a switching component (not shown), and an end effector 2. The central support is fixed inside the housing 1, and the transmission assembly is enclosed within the housing 1. One end of the transmission assembly is connected to a motor via a power transmission assembly (not shown), and the other end is connected to the end effector 2 and supported by the central support. The transmission assembly is connected to a handle to transmit power from the handle to the end effector 2, thereby driving the end effector 2 to perform closing, firing, firing reset, and opening. The transmission assembly, switching component, and central support are conventional designs in the art and will not be described in detail here.

[0029] Please see Figures 2 to 4 The end effector 2 includes an anvil assembly 21 and a staple cartridge assembly bracket 22 that moves relative to the anvil assembly 21 to close or open the end effector 2. The opening or closing of the end effector 2 is accomplished by the anvil assembly 21 and the staple cartridge assembly bracket 22, which form a jaw. Closing the jaw is equivalent to closing the end effector 2, and opening the jaw is equivalent to opening the end effector 2.

[0030] The anvil assembly 21 includes an anvil support 211 and an anvil head 212 disposed at the end of the anvil support 211. The anvil support 211 includes a first top wall 2112 facing the staple cartridge assembly support 22, first side walls 2114 extending downward from the left and right sides of the first top wall 2112, and a first bottom wall 2115 connected to the side walls. The anvil head 212 and the anvil support 211 are snap-fitted together by a sleeve 24. The anvil support 211 has a snap-fit ​​groove 2111 that mates with the sleeve 24, and the snap-fit ​​groove 2111 is disposed on one side of the anvil support 211. The anvil head 212 includes a head 2121 and a connecting portion 2122 extending rearward from the head 2121. The connecting portion 2122 has a slot. The sleeve 24 includes a sleeve body 242, an insertion portion 243 disposed on one side of the sleeve body 242 for connection with the slot, and a hook portion 241 disposed opposite to the insertion portion 243 for snap-fit ​​connection with the snap-fit ​​groove 2111. The hook portion 241 includes a cantilever extending rearward from the sleeve body 242 and a square locking block protruding upward from the cantilever along the height direction of the end actuator 2. In this embodiment, two hook portions 241 are provided, and the two hook portions 241 are disposed opposite to each other along the central axis of the end actuator 2. Correspondingly, the first top wall 2112 and the first bottom wall 2115 are recessed to form snap-fit ​​grooves 2111 that cooperate with the square locking block. The anvil assembly 21 also includes an anvil piece 213 connected to the anvil bracket 211, and the anvil piece 213 is disposed away from the anvil head 212.

[0031] Please see Figure 1 , Figure 2 and Figure 5 The staple cartridge assembly bracket 22 is a cantilever structure. The staple cartridge assembly bracket 22 includes a frame portion for fixing the staple cartridge assembly 100 and a connecting section extending rearward from the frame portion. The staple cartridge assembly bracket 22 is connected to the transmission assembly via the connecting section. The frame portion includes a second top wall 223 and second side walls 222 extending downward from the left and right sides of the second top wall 223.

[0032] Please see Figure 2 , Figure 6 and Figure 7The end effector 2 further includes a cutting guide assembly fired by a firing rod 3. The cutting guide assembly is disposed on one of the anvil assembly 21 and the staple cartridge assembly bracket 22. The other of the anvil assembly 21 and the staple cartridge assembly bracket 22 is provided with a guide groove 221. The cutting guide assembly includes a roller 231 slidably connected to the guide groove 221. In this embodiment, the cutting guide assembly is disposed on the anvil assembly 21, and the guide groove 221 is disposed on the staple cartridge assembly bracket 22. The following description is based on this embodiment. Admittedly, in other embodiments, the cutting guide assembly may also be disposed on the staple cartridge assembly bracket 22, and the guide groove 221 may be disposed on the anvil assembly 21, depending on the actual situation, and no specific limitation is made here.

[0033] Please see Figures 5 to 7 The guide groove 221 slopes upwards from the side away from the anvil head 212 towards the side closer to the anvil head 212. The guide groove 221 includes a first guide groove 2211, a second guide groove 2213, and a transition section 2212 connecting the first guide groove 2211 and the second guide groove 2213. The first guide groove 2211 is located away from the anvil head 212, and the second guide groove 2213 is located close to the anvil head 212. That is, the first guide groove 2211 is located close to the staple cartridge assembly bracket 22, and the second guide groove 2213 is located away from the staple cartridge assembly bracket 22 to create a height difference. The cutting guide assembly 25 slides along the first guide groove 2211 to cut. When it slides to the transition section 2212, because the guide groove 221 is higher than the staple cartridge assembly bracket 22, and the cutting guide assembly is located inside the anvil assembly 21, the cutting guide assembly pulls down the staple cartridge assembly bracket 22 to achieve closure. There are two guide grooves 221, which are symmetrically arranged on the staple cartridge assembly bracket 22. The cutting guide assembly includes two rollers 231, each roller 231 being slidably connected to each guide groove 221. By providing two guide grooves 221 on the staple cartridge assembly bracket 22 and having two rollers 231 cooperating with them, the staple cartridge assembly 100 is subjected to uniform force to achieve more stable closure, thereby ensuring a consistent staple height and closure gap.

[0034] Please see Figure 3 , Figure 5 , Figure 6 and Figure 7The anvil support 211 has a receiving cavity 2113 on its first top wall 2112. The anvil 213 has a sliding groove for sliding the cutting guide assembly. The sliding groove connects to the receiving cavity 2113, and the cutting guide assembly moves towards the anvil support 211 via the sliding groove. The firing rod 3 is housed within the receiving cavity 2113, and the cutting guide assembly is mounted on the firing rod 3. The firing rod 3 has a threaded section 31 and a smooth rod portion 32 extending longitudinally from the threaded section 31. The extension direction of the firing rod 3 is the same as the longitudinal extension direction of the anvil assembly 21. In this embodiment, the cutting guide assembly includes a cutting component 25 and a guide component 23 mounted on the firing rod 3 and threadedly engaged with the threaded section 31. The guide component 23 is positioned close to the transmission assembly, and the cutting component 25 is positioned away from the transmission assembly. The cutting component 25 can be connected to or separated from the guide component 23, depending on the actual situation, and no specific limitation is made here.

[0035] Please see Figure 8 and Figure 9 The guide assembly 23 includes a guide seat 232 disposed on and threadedly connected to the firing lever 3, and a connecting rod 233 connected to the guide seat 232. The roller 231 is connected to the connecting rod 233. One end of the connecting rod 233 is connected to the guide seat 232, and the other end is connected to the roller 231 via a shaft. The connecting rod 233 can also be connected to the guide seat 232 via a connecting member 234. The connecting member 234 includes a transverse member and a longitudinal member to form a T-shape. The two ends of the transverse member are respectively connected to the connecting rod 233, and the longitudinal member connects the transverse member and the guide seat 232. The firing lever 3 drives the guide seat 232 to move, thereby causing the connecting rod 233 and the roller 231 to slide along the guide seat 232.

[0036] Please see Figure 7 and Figure 10 The cutting assembly 25 includes a firing nut 251 threadedly connected to the firing lever 3 and a blade 252 disposed on the firing nut 251. The blade 252 has a cutting edge 2521 and a back edge 2522 opposite to the cutting edge 2521, the cutting edge 2521 being opposite to the firing lever 3. The blade 252 can be integrally formed with the firing nut 251. In this embodiment, the blade 252 and the firing nut 251 are separate components, with the blade 252 fixed to the firing nut 251. The blade 252 and the firing nut 251 can be connected by welding, riveting, or pins.

[0037] Admittedly, in other embodiments, the cutting guide assembly may also be a long blade assembly, which includes a guide seat 232 disposed within the receiving cavity 2113 and connected to the firing lever 3, a blade 252 disposed on the guide seat 232, and an extension section connected to the blade 252, with rollers 231 disposed on both sides of the extension section. Correspondingly, the position of the guide groove 221 changes accordingly. The staple cartridge assembly bracket 22 is provided with a sliding groove extending along the longitudinal direction of the staple cartridge assembly bracket 22, and the guide groove 221 is disposed on the sidewalls of the sliding groove on both sides of the sliding groove. The extension section is slidably connected to the guide groove 221 via rollers 231.

[0038] In summary, the present invention provides a cutting guide component on one of the anvil assembly 21 and the staple cartridge assembly bracket 22, and a guide groove 221 on the other of the anvil assembly 21 and the staple cartridge assembly bracket 22. The cutting guide component is slidably connected to the guide groove 221 via a roller 231, so that the cutting guide component moves along the direction of the guide groove 221 while driving the end actuator 2 to close or open stably, thereby ensuring the consistency of the closing gap and the staple height.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An end effector, comprising an anvil assembly, and a nail magazine assembly support that moves relative to the anvil assembly to complete the closing or opening of the end effector, characterized in that: The end actuator further comprises a cutting guide assembly fired by a firing rod, wherein the cutting guide assembly is arranged on one of the anvil assembly and the nail magazine assembly bracket, and a guide groove is arranged on the other of the anvil assembly and the nail magazine assembly bracket, and the cutting guide assembly comprises a roller slidably connected to the guide groove, and the roller moves along the direction of the guide groove to cause the end actuator to close or open; The guide groove is arranged in a climbing shape from low to high; the cutting guide assembly includes a cutting assembly and a guide assembly which are arranged on the firing rod and threadedly matched with the threaded section of the firing rod; the roller is connected to the guide assembly.

2. The end effector according to claim 1, characterized in that: The guide groove includes a first guide groove, a second guide groove and a transition section for connecting the first guide groove and the second guide groove.

3. The end effector according to claim 1, characterized in that: The number of the guide grooves is two, and the two guide grooves are symmetrically arranged on the anvil assembly or the nail magazine assembly bracket; the cutting guide assembly includes two rollers, and each roller is slidably connected to each guide groove.

4. The end effector according to claim 3, characterized in that: Guide grooves are arranged on both side walls of one of the anvil assembly and the nail magazine assembly bracket, and a receiving cavity for receiving the firing rod is arranged on the other of the anvil assembly and the nail magazine assembly bracket, and the cutting guide assembly is arranged on the firing rod.

5. The end effector according to claim 4, characterized in that: The cutting guide assembly also includes a guide seat disposed on the firing rod and threadedly connected to the firing rod, and a connecting rod connected to the guide seat, and the roller is connected to the connecting rod.

6. The end effector according to claim 3, characterized in that: A slide groove is arranged on one of the nail anvil assembly and the nail magazine assembly bracket, and the guide groove is arranged on the slide groove side walls on both sides of the slide groove.

7. The end effector according to claim 6, characterized in that: A cutting guide assembly is arranged on the other of the anvil assembly and the nail magazine assembly bracket, and the cutting guide assembly includes a guide base connected to the firing rod, a blade arranged on the guide base and an extension section connected to the blade, and the rollers are arranged on both sides of the extension section.

8. The end effector according to claim 7, characterized in that: The blade has a cutting edge surface, and the cutting edge surface is arranged opposite to the firing rod.

9. A surgical instrument, comprising a handle and a working head, characterized in that: The working head comprises an end effector as claimed in any one of claims 1 to 8.

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