CN111466979A - End effectors and surgical instruments - Google Patents

Abstract

The invention relates to an end effector and a surgical instrument, comprising a staple anvil assembly, a staple cartridge assembly bracket that moves relative to the staple anvil assembly to complete the closing or opening of the end effector, and drives the staple cartridge assembly bracket to the direction of the staple anvil assembly A closing drive assembly that moves to close or open the end effector, the nail anvil assembly is provided with a first chute, the staple cartridge assembly bracket is provided with a second chute, and the end effector also includes a firing rod that is fired and used to For the rigid connection assembly connecting the nail anvil assembly and the nail cartridge assembly bracket, the rigid connection assembly includes a first sliding block arranged in the first chute, a second sliding block arranged in the second chute, and a second sliding block for connecting the first A connecting rod of a sliding block and a second sliding block. A rigid connection assembly is arranged between the nail anvil assembly and the nail cartridge assembly bracket, and the rigid connection assembly is triggered and moved by the firing rod, which effectively ensures that the end effector will not be deformed when squeezed by external force, thereby ensuring the closed gap and the exit Nail height consistency.

Description

End effectors and surgical instruments

technical field

The invention relates to an end effector and a surgical instrument, belonging to the technical field of medical instruments.

Background technique

In general surgical treatment, surgical instruments are surgical tools in medical operations, and staplers are surgical instruments that are often used to complete the function of cutting and anastomotic tissue. They are used in medicine and replace manual suturing A device whose main working principle is to use titanium staples (stapling staples) to sever or staple tissue, similar to a stapler. However, the prior art stapler has the following disadvantages: when the target tissue is closed during surgery, since the front end of the stapler is a cantilever structure, such a design makes the stapler less rigid. When the stapler closes a large target tissue, it will be subjected to pressure from other parts of the target tissue, resulting in deformation of the stapler, making the closing gap inconsistent before and after, affecting the consistency of the height of the staple, thus affecting the quality of the operation and giving the surgical safety belt to influence.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an end effector and a surgical instrument that can ensure the closed gap and the height of the nails are consistent.

In order to achieve the above objects, the present invention provides the following technical solutions: an end effector, comprising a nail anvil assembly, a nail cartridge assembly bracket that moves relative to the nail anvil assembly to complete the closing or opening of the end effector, and a drive The staple cartridge assembly bracket moves toward the staple anvil assembly to make the end effector close or open a closing drive assembly, the staple anvil assembly is provided with a first chute, and the staple cartridge assembly bracket is provided with The second chute, the end effector further includes a rigid connection component fired by the firing rod and used to connect the anvil assembly and the staple cartridge assembly bracket, the rigid connection component includes a rigid connection component disposed in the first chute a first sliding block inside, a second sliding block arranged in the second sliding groove, and a connecting rod for connecting the first sliding block and the second sliding block.

Further, the firing rod is connected with the first sliding block or the second sliding block to drive the rigid connection assembly to move.

Further, the firing rod is connected with the connecting rod to drive the rigid connecting assembly to move.

Further, a cutting assembly for cutting the target tissue is disposed on the first sliding block or the second sliding block, and the cutting assembly is disposed on a side of the first sliding block or the second sliding block away from the firing rod.

Further, the cutting assembly includes a blade, the blade has a cutting edge surface, and the cutting edge surface is disposed opposite to the firing rod.

Further, the first sliding block or the second sliding block is provided with a hollow portion, and the first sliding block or the second sliding block is provided on the firing rod through the hollow portion.

Further, the staple cartridge assembly bracket includes a frame body and a connection portion extending backward from the frame body portion, the closing drive assembly includes a closing shaft, and the connection portion of the staple cartridge assembly bracket is movably installed on the on the closing shaft, and the staple cartridge assembly support moves along the longitudinal direction of the closing shaft on the closing shaft.

Further, the closing drive assembly further includes a closing nut disposed on the closing shaft, the closing nut is threadedly connected with the closing shaft, the connecting end has an installation hole, and the closing nut is inserted into the installation In the hole, there is clearance fit between the closing nut and the mounting hole.

The present invention also provides a surgical instrument comprising a handle portion and a working head, wherein the working head includes the above-mentioned end effector.

Further, the working head further includes a staple cartridge assembly disposed on the staple cartridge assembly bracket and used for suturing the target tissue, the staple cartridge assembly comprising a cartridge body, a plurality of staples disposed in the cartridge body, a drive A staple pusher for the staples to move relative to the cartridge body and an actuation member for driving the staple pusher to move relative to the cartridge body, the rigid connection component is connected to the brake member and drives the brake Piece moves.

The beneficial effect of the present invention is that: a rigid connection assembly is arranged between the nail anvil assembly and the nail cartridge assembly bracket, and the rigid connection assembly is triggered and moved by the firing rod, so as to effectively ensure that the end effector will not be deformed when squeezed by external force , so as to ensure the consistency of the closing gap and the height of the nails.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, and implement it according to the content of the description, the preferred embodiments of the present invention are described in detail below with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic structural diagram of the surgical instrument according to the first embodiment of the present invention.

FIG. 2 is an exploded view of the end effector of FIG. 1 .

FIG. 3 is a cross-sectional view of the end effector of FIG. 1 in the transverse direction.

Figure 4 is a perspective view of the rigid connection assembly, the nail anvil plate and the welding plate after assembly.

FIG. 5 is a cross-sectional view in the width direction of the end effector in FIG. 1 .

FIG. 6 is a schematic structural diagram of a rigid connection assembly.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention. The positional relationship of up, down, left, right, front and rear described below is based on FIG. 1 . In FIG. 1 , the direction of arrow a-a is the up-down direction, and the direction of arrow b-b is the front-rear direction.

Referring to FIG. 1 , a surgical instrument according to an embodiment of the present invention is an electrically driven stapler (hereinafter referred to as a stapler), which is used for suturing and cutting tissue. The stapler includes a gun body and a cartridge assembly 100 mounted on the gun body. The gun body includes a handle part (not shown) and a working head 10. In this embodiment, the handle part is a reusable sterilizable electric handle with a quick connection head and a signal transmission port inside. A replaceable battery pack for supplying electric power is also arranged in the part, and a power input device (not shown) for inputting power is arranged in the handle part, and the power input device includes a motor. The connection between the motor and the battery is a conventional design in the prior art, so it will not be described in detail here. Actions such as closing, opening, and firing of the working head 10 are driven by the handle portion.

The working head 10 includes a housing 1 , a center bracket (not shown), a closing transmission assembly (not shown), a firing transmission assembly (not shown), a switching component, and an end effector 2 . The center bracket is fixed in the housing 1, the closed transmission assembly and the firing transmission assembly are enclosed in the housing 1, and one end of the closed transmission assembly and the firing rotating assembly passes through a power transmission assembly (not shown) Connected with the motor, the other ends of the closing transmission assembly and the firing transmission assembly are respectively connected with the end effector 2 and supported by the center bracket. The closing transmission assembly and the firing transmission assembly are connected with the handle portion to transmit the power of the handle portion to the end effector 2, so that the end effector 2 is driven by the closing transmission assembly and the firing transmission assembly to realize closing, firing, and firing reset and open. The closing transmission assembly, the firing transmission assembly, the switching member and the center bracket are conventional designs in the art, so they will not be described in detail here. The switch member includes a switch lever (not shown) and a switch button 11 connected to the switch lever. The switch lever selectively transmits the power of the power input device through the closing transmission assembly to the closing drive assembly 5 or through the firing transmission assembly to transmit the power of the power input device to the firing rod 3, and the switch button 11 is on the housing 1 . The switching rod is driven to move on the closing transmission assembly and the firing transmission assembly by toggling the switching button 11 to realize switching between the two states of closing and firing. The connection between the switching rod and the closing transmission assembly and the firing transmission assembly is in the art conventional design, so it will not be described in detail here.

Referring to FIGS. 1 and 2 , the end effector 2 includes a staple anvil assembly 21 , a staple cartridge assembly bracket 22 that moves relative to the staple anvil assembly 21 to complete the closing or opening of the end effector 2 , and a drive The cartridge assembly holder 22 moves toward the anvil assembly 21 to close or open the closure drive assembly 5 of the end effector 2 . The opening or closing of the end effector 2 is completed by the staple anvil assembly 21 and the staple cartridge assembly bracket 22, the staple anvil assembly 21 and the staple cartridge assembly bracket 22 form a jaw, and the closing of the jaw is the end effector 2 is closed, and the opening of the jaw is the opening of the end effector 2.

The anvil assembly 21 includes an anvil bracket 211 and an anvil head 212 disposed on an end of the anvil bracket 211 , and the anvil bracket 211 includes a bottom wall 2111 disposed toward the cartridge assembly bracket 22 . , a side wall 2112 extending upward from the left and right sides of the bottom wall 2111 , and a nail anvil 2113 covering the side wall 2112 . The nail anvil head 212 is connected with the nail anvil bracket 211 through a snap connection. The nail anvil bracket 211 is provided with a snap groove 2116 with the nail anvil head 212 , and the snap groove 2116 is arranged in the nail anvil head 211 . One side of the anvil holder 211 . The anvil head 212 includes a head portion 2121 and a hook portion 2122 which is connected to the head portion 2121 and is used for snap connection with the locking groove 2116 . The hook portion 2122 includes a hook portion from the head portion 2121 A cantilever extending backward and a square clamping block protruding upward from the cantilever along the height direction of the end effector 2 are formed. In this embodiment, there are two hook portions 2122 , and the two hook portions 2122 are arranged opposite to each other along the central axis of the end effector 2 . Correspondingly, the side wall 2112 is concavely formed with a locking groove 2116 which is matched with the square locking block.

The staple cartridge assembly bracket 22 is a cantilever structure, and the staple cartridge assembly bracket 22 includes a frame body portion 221 for fixing the staple cartridge assembly 100, extending backward from the frame body portion 221 and used for connecting the frame body portion 221 , the connecting portion 222 of the closing drive assembly 5 , and the welding plate 223 welded with the frame portion 221 . In this embodiment, the connecting portion 222 is the cartridge slide rail 222 . The welding plate 223 is welded on the frame body 221 near the anvil assembly 21 , that is, the welding plate 223 is disposed opposite to the anvil plate 2113 . The closing drive assembly 5 includes a closing shaft 51 installed on the nail cartridge slide rail 222 and a closing nut 52 disposed on the closing shaft 51. The nail cartridge slide rail 222 is provided with a first installation hole 2221, so The frame body 221 is provided with a second installation hole 2211, the closing shaft 51 is inserted into the first installation hole 2221 and the second installation hole 2211, and the nail cartridge slide rail 222 is movably installed on the closing shaft 51 so that the staple cartridge assembly bracket 22 moves along the longitudinal direction of the closing shaft 51 . The closing shaft 51 is threadedly connected with the closing nut 52 provided thereon, and the closing nut 52 converts the rotational movement of the closing shaft 51 into a linear movement so that the closing nut 52 can move along the closing shaft on the closing shaft 51 51 in the longitudinal direction of the linear movement. A conical transmission gear set is arranged between the closing shaft 51 and the closing transmission assembly, and the conical transmission gear set includes a first bevel gear arranged on the closing transmission assembly and a The second bevel gear 53 meshed and provided on the closing shaft 51 .

Referring to FIGS. 2 , 3 to 6 , the nail anvil assembly 21 is provided with a first chute 2114 , the staple cartridge assembly bracket 22 is provided with a second chute 2231 , and the end effector 2 is further It includes a rigid connecting component 4 fired by the firing rod 3 and used to connect the anvil component 21 and the staple cartridge component bracket 22 . The working head 10 further includes a staple cartridge assembly 100 disposed on the staple cartridge assembly bracket 22 and used for suturing the target tissue, the staple cartridge assembly 100 including a cartridge body, a plurality of staples disposed in the cartridge body, A staple pusher that drives the staples to move relative to the cartridge body and an actuator that drives the staple pusher to move relative to the cartridge body, the rigid connection component 4 is connected to the brake member and drives the Brake moves.

In this embodiment, the first chute 2114 is provided on the nail anvil plate 2113 and extends along the longitudinal direction of the nail anvil board 2113 , and the second chute 2231 is provided on the welding plate 223 and extends along the longitudinal direction of the nail anvil board 2113 . It extends along the longitudinal direction of the welding plate 223 . The rigid connection assembly 4 includes a first sliding block 41 disposed in the first sliding groove 2114, a second sliding block 42 disposed in the second sliding groove 2231, and a second sliding block 42 for connecting the first sliding groove 2231. The block 41 and the connecting rod 43 of the second sliding block 42, the first sliding block 41, the second sliding block 42 and the connecting rod 43 form an I-beam structure. The anvil assembly 21 or the cartridge assembly bracket 22 is also provided with a receiving cavity 2115 for receiving the firing rod 3, and the firing rod 3 is connected with the first sliding block 41 or the second sliding block 42 to drive The rigid connection assembly 4 moves. The first sliding block 41 or the second sliding block 42 is provided with a hollow portion 411 , and the first sliding block 41 or the second sliding block 42 is disposed on the firing rod 3 through the hollow portion 411 . Certainly, one end of the firing rod 3 can also abut against the first sliding block 41 or the second sliding block 42 to push it to move. In this embodiment, the anvil assembly 21 is provided with a receiving cavity 2115 , and the firing rod 3 is received in the receiving cavity 2115 and is connected to the first slider 41 through the receiving cavity 2115 .

The firing rod 3 includes a threaded segment 31 and a polished rod portion 32 extending from the threaded segment 31 in the longitudinal direction. The hollow portion 411 is provided with a thread matched with the threaded segment 31 . The first sliding block 41 is provided with a cutting assembly for cutting the target tissue, and the cutting assembly is disposed on the side of the first sliding block 41 away from the firing rod 3 . The cutting assembly includes a blade 7 connected with the connecting rod 43 , and the blade 7 has a cutting edge surface 71 and a blade back disposed opposite to the cutting edge surface 71 . In this embodiment, the blade surface 71 is disposed opposite to the firing rod 3 .

Indeed, in other embodiments, the firing rod 3 is connected with the connecting rod 43 to drive the rigid connection assembly 4 to move, and the same effect can also be achieved. The implementation method is the same as the above, and will not be repeated here.

The gun body is provided with an electric control part, and the electric control part includes a tool retraction in-position identification device, and the retraction in-position identification device is connected with the first sliding block 41 . The retraction positioning identification device includes a positioning needle 61, an elastic member 62 disposed on the positioning needle 61, and a pressing ring 63 for pressing the elastic member 62. The retraction positioning identification device further includes a trigger. switch. When pressure is applied to the positioning needle 61, the positioning needle 61 is inserted into the trigger switch to trigger the trigger switch, then the electronic control part of the surgical instrument obtains the information that the first slider 41 returns to the original position, The electronic control part can inform the operator of the information by means of voice control or photoelectricity. By arranging the retraction position identification device, the surgical instrument can know whether the first sliding block 41 is retracted in position through electronic control.

To sum up, the rigid connection assembly 4 is arranged between the nail anvil assembly 21 and the nail cartridge assembly bracket 22, and the rigid connection assembly 4 is fired and moved by the firing rod 3, which effectively ensures that the end effector 2 is squeezed by external force. It will not be deformed during the time, so as to ensure the consistency of the closing gap and the height of the nail.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides an end effector, includes the nail anvil subassembly, relatively the nail anvil subassembly removes in order to accomplish the closed or open nail storehouse subassembly support of end effector and drive nail storehouse subassembly support moves so that the closed drive assembly that the end effector was closed or opened nail anvil subassembly orientation, a serial communication port, be provided with first spout on the nail anvil subassembly, be provided with the second spout on the nail storehouse subassembly support, the end effector still includes by the percussion pole percussion and is used for connecting the rigid coupling assembling of nail anvil subassembly and nail storehouse subassembly support, rigid coupling assembling is including setting up first slider in the first spout, setting are in second slider in the second spout and be used for connecting the connecting rod of first slider and second slider.

2. The end effector as set forth in claim 1 wherein said firing bar is coupled to said first sled or said second sled for driving movement of said rigid link assembly.

3. The end effector as set forth in claim 1 wherein said firing bar is connected to said connecting bar for driving movement of said rigid link assembly.

4. The end effector as claimed in claim 2 or 3, wherein said first or second sled has a cutting assembly disposed thereon for cutting target tissue, said cutting assembly being disposed on a side of said first or second sled remote from said firing bar.

5. The end effector as set forth in claim 4 wherein said cutting assembly includes a blade having a knife-edge face disposed opposite said firing bar.

6. The end effector as claimed in claim 2, wherein said first or second sled is provided with a hollow through which said first or second sled is disposed on said firing bar.

7. The end effector as claimed in claim 1, wherein said cartridge assembly support includes a frame portion and a coupling portion extending rearwardly from said frame portion, said closure drive assembly includes a closure shaft, said coupling portion of said cartridge assembly support is movably mounted on said closure shaft, and said cartridge assembly support moves on said closure shaft along a longitudinal direction of said closure shaft.

8. The end effector as set forth in claim 7 wherein said closure drive assembly further includes a closure nut disposed on said closure shaft, said closure nut being threadably coupled to said closure shaft, said coupling end having a mounting aperture into which said closure nut is inserted, said closure nut and mounting aperture being a clearance fit.

9. A surgical instrument comprising a handle portion and a working head, wherein the working head comprises an end effector as claimed in any one of claims 1 to 8.

10. The surgical instrument of claim 9, wherein the working head further comprises a cartridge assembly disposed on the cartridge assembly support for stapling the target tissue, the cartridge assembly comprising a cartridge body, a plurality of staples disposed in the cartridge body, a staple pusher for driving the staples to move relative to the cartridge body, and an actuating member for driving the staple pusher to move relative to the cartridge body, the rigid connection assembly being connected to the actuating member and driving the actuating member to move.

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