Separating element for a surgical instrument and surgical instrument

Abstract

The application provides a separating piece for a surgical instrument, which comprises a connecting part and a working part, the connecting part is detachably connected with the surgical instrument through a matching mechanism, and the working part is used for stripping tissues, the matching mechanism comprises a clamping mechanism, the clamping mechanism elastically connects or disconnects the separating piece with the surgical instrument, so that the connecting part is detachably connected with the surgical instrument. After the separating piece is connected with the surgical instrument, a doctor firstly uses the separating piece to strip target tissues from other tissues, then the doctor moves the surgical instrument forward, so that the target tissues are arranged between a staple cartridge seat and a butt seat, and the doctor operates the surgical instrument to cut and suture the target tissues. The doctor can operate more easily by using the separating piece to strip the target tissues, and the separating piece is elastically connected with the surgical instrument, so that the connection is reliable and the separating piece is convenient to disassemble and assemble.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a separating element for a surgical instrument, which is used to separate tissue. The present application also relates to a surgical instrument to which the separating element can be mounted. BACKGROUND

[0002] An anastomat, which is a surgical instrument capable of cutting off excess tissue while suturing a wound of a patient, is widely used in minimally invasive surgeries such as abdominal surgery, gynecological surgery, pediatric surgery, and thoracic surgery to cut off and anastomat tissue. The anastomat enters the human body through a cannula of a puncture device precisely positioned at a surgical site, and then makes a longitudinal incision in the tissue and applies a staple on the opposite side of the incision, thereby cutting off and anastomatizing the tissue, similar to a stapler. The anastomat includes an end effector, which includes a staple cartridge seat for receiving a staple cartridge and a staple anvil seat. The anastomat also includes a cutting member operably supported relative to the staple cartridge seat. Once the surgeon determines that the end effector properly grasps the tissue and is in a closed position, the surgeon can fire the anastomat to cut and suture the tissue.

[0003] During a surgery, the surgeon sometimes needs to cut and suture a specific target tissue, which is attached to other tissues. For example, the surgeon sometimes needs to cut and suture a blood vessel, but the blood vessel is usually attached to other tissues. In order to cut and suture the blood vessel, the surgeon needs to peel the blood vessel from the other tissues, then make the blood vessel enter between the staple anvil seat and the staple cartridge seat, and finally use the anastomat to cut and suture the blood vessel.

[0004] When the surgeon operates the existing surgical instrument, if the surgeon needs to cut and suture a specific target tissue, the surgeon usually needs to repeatedly adjust the angle of the surgical instrument, so that the distal end of the end effector is aligned with the target tissue, and then the surgeon exerts a force on the surgical instrument in a direction towards the distal end, so that the distal end of the end effector first separates the target tissue, and then the target tissue is located between the staple anvil seat and the staple cartridge seat, thereby cutting and suturing the target tissue.

[0005] However, the design of the distal end of the existing end effector is not suitable for peeling the target tissue, and the operation of the surgeon using the end effector of the surgical instrument to separate the target tissue is time-consuming and laborious. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application aims to provide a separating element for a surgical instrument, which is convenient for the surgeon to separate the target tissue after being mounted to the surgical instrument.

[0007] The application realizes the technical scheme as follows: a separate part for a surgical instrument, the separate part comprising a mounting part and a working part connected together, the mounting part being detachably mounted with the surgical instrument through a matching mechanism, the working part being used for stripping tissue, the matching mechanism comprising a clamping mechanism, the clamping mechanism enabling the separate part to be elastically matched with or separated from the surgical instrument, so that the mounting part is detachably mounted with the surgical instrument.

[0008] Further, the clamping mechanism comprises a clamping part arranged on the separate part and a clamping interface arranged on the surgical instrument, in a first state, the clamping part is clamped into the clamping interface under the action of elastic force to realize the elastic matching, in a second state, the clamping part is separated from the clamping interface by overcoming the action of elastic force.

[0009] Further, the clamping part has a first end and a second end, the first end is connected with the mounting part, and the second end is elastically matched with or separated from the clamping interface.

[0010] Further, the second end rotates around the first end.

[0011] Further, the first end comprises a rotating shaft, the mounting part is provided with a shaft hole, and the rotating shaft is accommodated in the shaft hole.

[0012] Further, the shaft hole is partially open, and part of the rotating shaft is accommodated in the shaft hole.

[0013] Further, the separate part further comprises a supporting part, the supporting part has a first part and a second part, the first part is connected with the mounting part and covers the shaft hole, and the second part abuts against the clamping part to elastically support the clamping part.

[0014] Further, the axis of rotation is perpendicular to the central symmetry plane of the longitudinal direction of the separate part.

[0015] Further, in the first state, the second end protrudes from the surface of the mounting part.

[0016] Further, the second end comprises a clamping surface and an inclined surface arranged at an angle with the clamping surface, and the clamping surface extends vertically.

[0017] Further, the second end further comprises a top surface arranged between the clamping surface and the inclined surface.

[0018] Further, the mounting part is provided with a containing space, and part of the clamping part is accommodated in the containing space.

[0019] Further, the containing space comprises an opening penetrating through the mounting part, and in the first state, the second end of the clamping part protrudes from the opening.

[0020] Further, the separating piece further comprises an elastic body abutting against the clamping portion, at least part of the elastic body being accommodated in the accommodating space.

[0021] Further, the separating piece further comprises an elastic body abutting against the clamping portion, the elastic body abutting against the clamping portion to elastically support the clamping portion.

[0022] Further, the elastic body is a supporting portion, at least part of the supporting portion being made of an elastic material, the supporting portion having a first portion connected to the mounting portion and a second portion abutting against the clamping portion.

[0023] Further, the separating piece further comprises another elastic body arranged between the supporting portion and the clamping portion.

[0024] Further, at least part of the clamping portion is made of an elastic material.

[0025] Further, the matching mechanism further comprises a plug-in mechanism, the plug-in mechanism comprising a plug-in portion arranged on the separating piece and a plug-in channel arranged on the surgical instrument, the plug-in portion and the clamping portion being inserted into the surgical instrument along the plug-in channel.

[0026] Further, the plug-in channel extends from a distal end of the surgical instrument in a direction towards a proximal end, the clamping port being in communication with a distal end of the plug-in channel and penetrating a side wall of the plug-in channel.

[0027] Further, the side wall is provided with a first hollowed portion and a second hollowed portion in sequence in communication with the distal end of the clamping port, the width of the second hollowed portion being greater than the width of the first hollowed portion, and the width of the clamping port being greater than the width of the first hollowed portion.

[0028] Further, the clamping port, the first hollowed portion and the second hollowed portion are coaxially arranged.

[0029] Further, the surgical instrument is a stapler, and the separating piece is detachably mounted with an end effector of the stapler.

[0030] Further, the separating piece is detachably mounted with a staple seating portion of the end effector.

[0031] Further, the clamping mechanism comprises a clamping portion arranged on the separating piece and a clamping port arranged on the staple seating portion, the clamping portion and the clamping port being elastically matched, and the clamping port being arranged on a staple seating surface or a back surface of the staple seating portion.

[0032] Further, the distal end of the nail abutting seat is provided with a first wedge-shaped part having a first inclined surface, and the proximal end of the working part is provided with a second wedge-shaped part having a second inclined surface; after the separating piece is installed on the nail abutting seat, the first inclined surface abuts against the second inclined surface.

[0033] Further, the combined thickness of the first wedge-shaped part and the second wedge-shaped part is substantially equal to the thickness of the nail abutting seat at the proximal end adjacent to the first inclined surface, and / or substantially equal to the thickness of the separating piece at the distal end adjacent to the second inclined surface.

[0034] Further, the mounting part extends from the second inclined surface in a direction towards the proximal end.

[0035] Further, the working part comprises a proximal end and a distal end, and the width of the working part gradually decreases in a direction from the proximal end towards the distal end.

[0036] Compared with the prior art, the separating piece is installed on the surgical instrument, and then the doctor uses the separating piece to separate the target tissue from other tissues, and then the doctor moves the surgical instrument forward to make the target tissue enter between the nail cartridge seat and the nail abutting seat, and then operates the surgical instrument to cut and suture the target tissue. The doctor's operation is more convenient by using the separating piece to separate the target tissue, and the separating piece is elastically connected with the surgical instrument, and the connection is reliable and convenient to disassemble.

[0037] The application also provides a surgical instrument for installing the separating piece.

[0038] The application achieves the above technical effects by the following technical scheme: a surgical instrument comprising an end effector, wherein the end effector is provided with the separating piece.

[0039] Compared with the prior art, the doctor's operation is more convenient by using the separating piece to separate the target tissue, and the clamping mechanism elastically connects the separating piece with the surgical instrument, and the connection is reliable and convenient to disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a front view of the surgical instrument provided by the application;

[0041] Figure 2 is a front view of the surgical instrument provided by the application; Figure 1 is a front view of the surgical instrument provided by the application;

[0042] Figure 3 is a front view of the surgical instrument provided by the application; Figure 4 is a front view of the surgical instrument provided by the application; Figure 2 is a front view of the surgical instrument provided by the application;

[0043] is a front view of the surgical instrument provided by the application;Figure 5 is Figure 4 is an exploded perspective view of the separate piece shown in Fig. 9;

[0044] Figure 6 is Figure 1 is a partial perspective view of the staple abutment of the surgical instrument shown in Fig. 10;

[0045] Figure 7 and Figure 8 is a perspective view of the combination of the staple abutment, the separate piece, and the package;

[0046] Figure 9 and Figure 10 is Figure 8 is an exploded perspective view of the combination shown in Fig. 11;

[0047] Figure 11 is Figure 10 is a perspective view of the package shown in Fig. 12;

[0048] Figure 12 and Figure 13 is Figure 7 is a longitudinal sectional view, Figures 12 to 13 the state change shows the state change process of detaching the separate piece using the package;

[0049] Figure 14 is Figure 12 is a magnified view of portion A in Fig. 13;

[0050] Figure 15 is Figure 12 is a magnified view of portion B in Fig. 14;

[0051] Figure 16 is a perspective view of the separate piece provided by the second embodiment of the present application; Figure 17 is Figure 16 is an exploded perspective view of the separate piece shown in Fig. 15;

[0052] Figure 18 is an exploded perspective view of the separate piece provided by the third embodiment of the present application;

[0053] Figure 19 is a perspective view of the separate piece provided by the fourth embodiment of the present application;

[0054] Figure 20 is Figure 19 is an exploded perspective view of the separate piece shown in Fig. 16;

[0055] Figure 21 is a perspective view of the separate piece mounted to the staple abutment provided by the fifth embodiment of the present application;

[0056] Figure 22 is Figure 21 is a perspective view of the separate piece shown in Fig. 17;

[0057] Figure 23 is a perspective view of the separate piece mounted to the staple buttress according to the sixth embodiment of the present application;

[0058] Figure 24 and Figure 25 is a perspective view of the separate piece shown in Figure 23 ;

[0059] Figure 26 is a perspective view of the separate piece shown in Figure 23 ;

[0060] Figure 27 is a perspective view of the separate piece mounted to the staple buttress according to the seventh embodiment of the present application;

[0061] Figure 28 is a perspective view of the separate piece shown in Figure 27 ;

[0062] Figure 29 is a perspective exploded view of the separate piece shown in Figure 28 . DETAILED DESCRIPTION

[0063] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

[0064] The terms "proximal", "rear" and "distal", "front" used in the present application are relative to the clinician who manipulates the handle assembly of the surgical instrument. The terms "proximal", "rear" refer to the part close to the clinician, and the terms "distal", "front" refer to the part away from the clinician. For example, the handle assembly is proximal and rear, and the end effector is distal and front; for another example, the proximal end of a certain component indicates the end relatively close to the handle assembly, and the distal end indicates the end relatively close to the end effector. In the present application, the relative position relationship of the components of the separate piece, such as being located at the "proximal" end or the "distal" end, is taken as a reference to the state of the separate piece mounted on the surgical instrument. The terms "upper", "lower" are taken as a reference to the relative positions of the staple buttress and the staple cartridge seat of the end effector, specifically, the staple buttress is "upper" and the staple cartridge seat is "lower".

[0065] The term "longitudinal" is defined as a direction from a proximal end to a distal end, or from a distal end to a proximal end. The "longitudinal" direction of the separating element is defined in the state that the separating element is mounted to the surgical instrument. The "longitudinal" direction of the packaging box is defined in the state that the separating element is mounted to the packaging box, i.e. the longitudinal direction of the packaging box is parallel to the longitudinal direction of the separating element. In addition, a component is longitudinally extended if the length of the component is greater than its width, for example, the component is in the form of a long strip, but it should be understood that the "longitudinally extended" does not limit the specific shape and position of the component.

[0066] The side surface of the separating element close to the target tissue is defined as the "front surface", and the side surface away from the target tissue is defined as the "back surface". Specifically, when the separating element works, the concave surface of the working part is close to the target tissue and can separate the target tissue from other tissues, and the side surface where the concave surface is located is defined as the front surface, and the side surface where the convex surface is located is defined as the back surface.

[0067] It should be understood that the terms "proximal", "distal", "rear", "front", "upper", "lower", "front surface", "back surface" are defined for the convenience of description, however, the surgical instrument can be used in many directions and positions, so these terms expressing relative position relationship are not limited and absolute. The "longitudinal" direction is also defined for the convenience of description. In the present application, the above definitions shall follow the explicit provisions and limitations if there are any.

[0068] In the present application, unless otherwise explicitly provided and limited, the terms such as "connected" shall be understood broadly, for example, it can be fixedly connected, or detachably connected, or movably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. The "connection" does not include integration, and the meaning of "connection" is the same as "connected" except for this. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] Figure 1 The surgical instrument 100 in the present application is shown.

[0070] Please refer to Figure 1 The surgical instrument provided by the present application is a stapler, preferably an electric stapler. The surgical instrument 100 comprises a main machine 10 and a battery pack 12 detachably mounted to the main machine 10. Those skilled in the art can conceive that the surgical instrument can also be a manual stapler, and any scheme similar to or the same as the present embodiment is covered within the protection scope of the present application.

[0071] The host 10 comprises a shaft assembly 14, a housing 16 arranged at one end of the shaft assembly 14, and an end effector 18 arranged at the other end of the shaft assembly 14, wherein the end effector 18 is provided with a cutting member (not shown).

[0072] The shaft assembly 14 comprises a sleeve 20 and a mandrel (not shown) accommodated in the sleeve 20. The housing 16 is provided with a motor and a transmission mechanism, wherein the motor drives the end effector 18 and the cutting member through the transmission mechanism. The end effector 18 comprises a cartridge seat 28 for operably supporting a cartridge assembly (not shown) therein and a butt seat 30 rotatably connected to the cartridge seat 28, wherein the butt seat 30 is selectively movable between an open position and a closed position to clamp or release the tissue. The cutting member is arranged in the end effector 18 for cutting the tissue, and the cartridge assembly is used for suturing the tissue.

[0073] The transmission mechanism comprises an end effector driving device for driving the butt seat 30 of the end effector 18 to rotate relative to the cartridge seat 28 and selectively move between the closed position and the open position. Generally, the end effector driving device comprises a gear, a cam, and the sleeve 20, wherein the gear drives the linear motion of the sleeve 20 through the conversion of the cam, and the linear motion of the sleeve 20 drives the rotation of the butt seat 30 through the conversion mechanism. The specific structure of the end effector driving device is the same as or similar to that of the prior art, and thus will not be described herein.

[0074] The transmission mechanism further comprises a cutting member driving device, which generally comprises a gear, a rack, and a mandrel, wherein the gear rotates to drive the linear motion of the rack, the mandrel, and the cutting member, so that the cutting member can cut the tissue. The specific structure of the cutting member driving device is the same as or similar to that of the prior art, and thus will not be described herein.

[0075] In use, first, the end effector driving device drives the sleeve 20 to drive the butt seat 30 to rotate and cooperate with the cartridge seat 28 to clamp the target tissue; then, the motor is started and rotates forward, the cutting member driving device drives the cutting member to advance through the mandrel, the cutting member moves from an initial position to a terminal position in the end effector 18 of the surgical instrument, and the cutting member synchronously pushes the pusher block in the cartridge to move from the initial position to the terminal position, thereby achieving the effect of cutting the excess tissue while suturing the cut tissue; subsequently, the motor reverses, the cutting member driving device drives the cutting member to retreat to the initial position through the mandrel; then, the end effector driving device drives the sleeve 20 to drive the butt seat 30 to open and release the tissue; finally, the end effector driving device drives the sleeve 20 to drive the butt seat 30 to close. Of course, before and after use, the butt seat 30 needs to be closed relative to the cartridge seat 28, so that the end effector 18 can be inserted into or taken out of the patient's body through the trocar sleeve, and thus will not be described herein.

[0076] Figures 2 to 15 A separate piece of the first embodiment of the present application is shown, which is used in cooperation with the surgical instrument 100.

[0077] Please refer to Figure 1 and Figure 2 , the present embodiment also provides a separate piece 200 used in cooperation with the surgical instrument 100, which is used to separate tissues, specifically, the separate piece 200 is used to separate a target tissue from other tissues, so as to facilitate the surgical instrument 100 to cut and suture the target tissue. For example, the doctor first uses the separate piece 200 to separate a blood vessel from other tissues, and then uses the surgical instrument 100 to cut and suture the separated blood vessel.

[0078] The separate piece 200 is detachably connected with the surgical instrument 100. That is, the separate piece 200 is switched between a first state and a second state, in the first state, the separate piece 200 is connected with the surgical instrument 100; in the second state, the separate piece 200 is disconnected with the surgical instrument 100.

[0079] Therefore, when the separate piece 200 is needed to be used, the doctor connects the separate piece 200 with the surgical instrument 100, the doctor first separates the target tissue from other tissues by using the separate piece 200, and then the doctor moves the surgical instrument 100 forward to make the target tissue enter between the cartridge seat 28 and the anvil seat 30, and operates the surgical instrument 100 to cut and suture the target tissue. When the separate piece 200 is not needed to be used, the doctor switches the separate piece 200 from the first state to the second state, so that the separate piece 200 is disconnected with the surgical instrument 100, thereby avoiding the separate piece 200 occupying the operation space and affecting the convenience of the surgical instrument 100 to cut and suture other tissues.

[0080] Specifically, the separate piece 200 is detachably connected with the end effector 18 of the surgical instrument 100. The end effector 18 is a working part of the surgical instrument 100 which directly contacts and cuts and sutures tissues, and the separate piece 200 is detachably connected with the end effector 18, which conforms to the operation habit of the doctor and facilitates the operation of the doctor.

[0081] More specifically, the separate piece 200 is detachably connected with the anvil seat 30 of the end effector 18. Since the anvil seat 30 of the existing surgical instrument 100 is not installed with other components such as a cartridge, the separate piece 200 is detachably connected with the anvil seat 30, which rationally utilizes the anvil seat 30 without affecting the installation and disconnection of other components (such as the cartridge), and the design is more reasonable. More specifically, the separate piece 200 is detachably connected with the distal end of the anvil seat 30, which is more in line with the operation habit of the doctor and facilitates the operation of the doctor.

[0082] Please refer to Figures 3 to 5The separating piece 200 comprises a mounting portion 220 and a working portion 230. The mounting portion 220 is detachably connected with the surgical instrument 100, specifically, detachably connected with the distal end of the anvil 30 of the end effector 18. The working portion 230 is used for stripping tissue.

[0083] The mounting portion 220 is detachably connected with the surgical instrument 100 through a cooperation mechanism. The cooperation mechanism comprises a plug-in mechanism and a clamping mechanism. The plug-in mechanism comprises a plug-in portion 222 arranged on the separating piece 200 and a plug-in channel 50 arranged on the surgical instrument 100. The clamping mechanism comprises a clamping portion 240 arranged on the separating piece 200 and a clamping port 60 arranged on the surgical instrument 100. The plug-in channel 50 and the clamping port 60 are in communication, specifically, the clamping port 60 is in communication with the proximal end of the plug-in channel 50 and penetrates the sidewall of the plug-in channel. When the separating piece 200 is mounted, the plug-in portion 222 and the clamping portion 240 are inserted into the surgical instrument 100 along the plug-in channel 50, after a certain stroke, the clamping portion 240 is clamped into the clamping port 60, and the separating piece 200 is fixed to the surgical instrument 100. In this way, the mounting portion 220 of the separating piece 200 and the surgical instrument 100 are detachably connected through plug-in and clamping, the mounting is reliable, and the dismounting is convenient.

[0084] The mounting portion 220 comprises the plug-in portion 222 and the clamping portion 240 connected with each other. The clamping portion 240 is elastically matched with the surgical instrument 100. That is, the clamping portion 240 is connected with the surgical instrument 100 under the action of the elasticity, and is separated from the surgical instrument 100 by overcoming the action of the elasticity, the connection is reliable and the dismounting is convenient. The source of the elasticity can be the elasticity of the clamping portion 240 itself; or the other elastic body abuts against the clamping portion 240, and the other elastic body provides the elastic force for the clamping portion 240.

[0085] Specifically, the clamping portion 240 is elastically matched with the clamping port 60. That is, the clamping portion 240 is clamped into the clamping port 60 under the action of the elasticity, so that the separating piece 200 is fixed to the surgical instrument 100. By overcoming the action of the elasticity, the clamping portion 240 can be separated from the clamping port 60, so that the separating piece 200 is separated from the surgical instrument 100.

[0086] The clamping portion 240 has a first end 241 and a second end 242, the first end 241 is connected with the plug-in portion 222, and the second end 242 is elastically matched with the surgical instrument 100. Specifically, the second end 242 rotates around the first end 241, so that the separating piece 200 is fixed to the surgical instrument 100 or separated therefrom, thereby realizing detachable connection. The second end 242 rotates around the first end 241, that is, the rotation axis is located at the position of the first end 241. In the embodiment, the rotation axis of the second end 242 is perpendicular to the central symmetry plane of the longitudinal direction of the separating piece 200. In the embodiment, the first end 241 is located at the distal end relative to the second end 242, and those skilled in the art can conceive that the first end 241 can also be located at the proximal end relative to the second end 242.

[0087] Specifically, the first end 241 comprises a rotating shaft 243, the insertion part 222 is provided with a shaft hole 224, the rotating shaft 243 is installed in the shaft hole 224, the rotating shaft 243 rotates in the shaft hole 224 to make the clamping part 240 rotate, and finally make the detachable part 200 and the surgical instrument 100 detachably connected. The rotating axis is the central axis of the rotating shaft 243.

[0088] The shaft hole 224 is partially open, and the rotating shaft 243 is partially accommodated in the shaft hole 224. That is, the circumferential extension angle of the shaft hole 224 is less than 360 degrees, for example, the circumferential extension angle of the shaft hole 224 is 180 degrees. The shaft hole 224 is partially open, which is very convenient for the operation of installing the rotating shaft 243 into the shaft hole 224, and can also reduce the size of the detachable part 200, so that the structure of the detachable part 200 is more compact.

[0089] The first end 241 of the clamping part 240 is installed on the first side surface 229 of the insertion part 222. It should be noted that the first side surface 229 refers to the surface on the back side of the insertion part 222, and this surface is not limited to the planar area indicated by the reference numeral 229. The second end 242 of the clamping part 240 protrudes from the second side surface 227 of the insertion part 222. It should be noted that the second side surface 227 refers to the surface on the front side of the insertion part 222, and this surface is not limited to the planar area indicated by the reference numeral 227. The insertion part 222 is provided with an opening 228 penetrating the first side surface 229 and the second side surface 227, and the second end 242 protrudes from the second side surface 227 through the opening 228 from the first side surface 229.

[0090] Therefore, the opening 228 provides space for the movement stroke of the second end 242 of the clamping part 240, that is, the thickness of the insertion part 222 itself provides space for the movement stroke of the second end 242 of the clamping part 240, which is not only structurally reliable, but also can reduce the size of the detachable part 200, and the structural design is very reasonable.

[0091] The second end 242 of the clamping part 240 is elastically connected with the clamping interface 60 on the surgical instrument 100. In this embodiment, the clamping part 240 itself does not have elasticity, and the detachable part 200 further comprises a supporting part 250 abutting against the clamping part 240, and the supporting part 250 elastically supports the clamping part 240. The supporting part 250 is at least partially made of elastic material, and the supporting part 250 provides elastic force for the clamping part 240. That is, the clamping part 240 only needs to realize the function of connecting or disconnecting with the surgical instrument 100, and the supporting part 250 only needs to realize the function of providing elastic force, and the clamping part 240 and the supporting part 250 perform their respective functions, which can reduce the process requirements of the clamping part 240 and the supporting part 250, and is more in line with the mass production demand.

[0092] To apply a force to the clamping portion 240 toward the second side surface 227, so that the clamping portion 240 is kept in the clamping port 60 without external force, thereby keeping in the first state connected with the surgical instrument 100, the support portion 250 is arranged on the first side surface 229 of the clamping portion 240 and away from the second side surface 227 relative to the clamping portion 240.

[0093] Specifically, the support portion 250 has a first portion 251 connected with the first side surface 229 and a second portion 252 abutting the clamping portion 240, which provides a spring force to the clamping portion 240 to make the clamping portion 240 have a tendency to be clamped into the clamping port 60.

[0094] To reliably fix the support portion 250 on the separation piece 200, the mounting portion 220 is provided with a connecting portion 260, and the support portion 250 is welded and fixed with the mounting portion 220 at the connecting portion 260. Those skilled in the art can conceive that other suitable fixing methods can also be used according to the materials of the support portion 250 and the mounting portion 220.

[0095] As described above, the shaft hole 224 in which the rotating shaft 243 is mounted is partially open. To avoid the rotating shaft 243 from falling off the open shaft hole 224, the support portion 250 covers the open part of the shaft hole 224. Specifically, the connecting portion 260 is arranged adjacent to the shaft hole 224, and the connecting portion 260 is away from the second end 242 of the clamping portion 240 relative to the shaft hole 224. The distal end of the first portion 251 of the support portion 250 is fixed on the connecting portion 260. Thus, the support portion 250 extending from the distal end toward the proximal end can naturally cover the shaft hole 224, and the structural design is very reasonable.

[0096] As can be seen, the position of a part of the rotating shaft 243 is defined by the shaft hole 224, and the position of another part is defined by the support portion 250. Compared with the support portion 250 stacked on the fully closed shaft hole 224, the size of the separation piece 200 can be significantly reduced, and the structure of the separation piece 200 is more compact.

[0097] It should be emphasized that the present application is committed to reducing the size of the separation piece 200 in many aspects. Although these designs may not be visible to the naked eye (e.g., less than 1 mm), they are crucial to the size of the separation piece 200 because: the end effector 18 of the surgical instrument 100 and the separation piece 200 both need to pass through the puncture cannula to operate in the patient's body. In order to achieve the purpose of minimally invasive surgery, the puncture cannula has a standard size (e.g., 5mm\10mm\12mm\15mm), and the width of the end effector 18 and the separation piece 200 must be less than the diameter of the puncture cannula. Therefore, even if the size is reduced by less than 1 mm, the designer needs to repeatedly consider and optimize the structure to achieve the design of the end effector 18 and the separation piece 200.

[0098] As mentioned above, the first end 241 of the clamping portion 240 is mounted on the first side surface 229 of the insertion portion 222, and the first part 251 of the supporting portion 250 is connected with the first side surface 229. In order to better arrange the clamping portion 240 and the supporting portion 250, the first side surface 229 of the insertion portion 222 is inwardly recessed to form a receiving space 226, i.e. the insertion portion 222 of the mounting portion 220 is provided with the receiving space 226, and part of the clamping portion 240 is accommodated in the receiving space 226. The receiving space 226 includes an opening 228 extending through the insertion portion 222, and the second end 240 of the clamping portion 240 protrudes from the opening 228 to clamp the card connector 60 in the first state. When the separating piece 200 is in the first state, part of the clamping portion 240 is accommodated in the receiving space 226. Preferably, when the separating piece 200 is in the first state, part of the supporting portion 250 is also accommodated in the receiving space 226.

[0099] Since the receiving space 226 can accommodate at least part of the clamping portion 240, and even at least part of the supporting portion 250, the clamping portion 240 and the supporting portion 250 are prevented from protruding out of the first side surface 229 of the insertion portion 222, the space of the insertion portion 222 itself is reasonably utilized, the size of the insertion portion 222 can be reduced, and the structure of the insertion portion 222 can be more regular. The receiving space 226 accommodates part of the clamping portion 240, and also limits the clamping portion 240; and the second end 242 of the clamping portion 240 is located in the opening 228, so that the second end 242 can change position under the action of the elastic force to play its function. Preferably, part of the supporting portion 250 is accommodated in the receiving space 226, which can also prevent the supporting portion from interfering with the insertion channel when the insertion portion is inserted into the insertion channel.

[0100] In this embodiment, the insertion portion 222 and the clamping portion 240 themselves do not have elasticity, and the separating piece 200 further includes an elastic body abutting against the clamping portion 240, and the elastic body abuts against the clamping portion 240 to elastically support the clamping portion 240. The elastic body is the supporting portion 250, and the supporting portion 250 is at least partially made of an elastic material, and the supporting portion 250 provides an elastic force for the clamping portion 240. Those skilled in the art can conceive that the clamping portion 240 itself can also have elasticity, and any solution that is the same as or similar to this embodiment is covered within the protection scope of the present application.

[0101] In the embodiment, no other elastic body is arranged between the support portion 250 and the clamping portion 240, and only the support portion 250 provides elastic force for the clamping portion 240, that is, the elastic body abutting against and elastically supporting the clamping portion 240 only includes the support portion 250. Those skilled in the art can conceive that, on the basis of arranging the support portion 250, another elastic body, for example, a second elastic body, is arranged between the support portion 250 and the clamping portion 240, and the second elastic body and the support portion 250 jointly provide elastic force for the clamping portion 240. Alternatively, no support portion 250 is arranged, and only the other elastic body provides elastic force for the clamping portion 240, and any solution identical or similar to the embodiment is included in the protection scope of the present application.

[0102] The second end 242 of the clamping portion 240 includes a clamping surface 244 and an inclined surface 246 arranged at an angle with the clamping surface 244. As shown in Figure 3 , the clamping surface 244 extends vertically, and as shown in Figure 2 , Figure 3 , Figure 6 , the clamping surface 244 abuts against the side wall of the clamping port 60 to prevent the separation piece 200 from falling off the surgical instrument 100. As shown in Figure 3 , the inclined surface 246 extends upward from the proximal end to the distal end, and here, upward refers to the direction toward the opening of the clamping port 60. Under the guidance of the inclined surface 246, the second end 242 changes position due to the rotation of the clamping portion 240 during the insertion into the insertion channel 50, so that the insertion portion 222 and the clamping portion 240 of the separation piece 200 can be more smoothly inserted into the insertion channel 50 from the distal end to the proximal end.

[0103] The second end 242 of the clamping portion 240 further includes a top surface 248 arranged between the clamping surface 244 and the inclined surface 246. The top surface 248 has a certain width, which can make the structure of the second end 242 more reliable. The top surface 248 can be a flat surface or an inclined surface 246. If the top surface 248 is an inclined surface, the inclination angle of the top surface 248 is preferably smaller than that of the inclined surface 246.

[0104] It should be noted that, in the embodiment, the clamping portion 240 is integrally formed, and those skilled in the art can conceive that, the parts of the clamping portion 240 are separately formed and connected by a specific connection method, and any solution identical or similar to the embodiment is included in the protection scope of the present application.

[0105] As described above, the mounting portion 220 of the separation piece 200 includes the insertion portion 222 mounting the clamping portion 240. Please refer to Figures 4 to 6 , the insertion portion 222 extends longitudinally, and correspondingly, the insertion channel 50 extends from the distal end face of the surgical instrument 100 to the proximal end, specifically, the insertion channel 50 extends from the distal end face of the anvil 30 to the proximal end.

[0106] As known to those skilled in the art, the anvil 30 is provided with a longitudinally extending knife slot 33 which receives and guides the movement of a portion of the cutting member of the surgical instrument 100, the knife slot 33 being disposed at the center of the anvil 30 and extending longitudinally. The insertion channel 50, the clamping port 60 and the knife slot 33 are coaxially arranged and communicate with each other, and the structure is regular.

[0107] The clamping port 60 communicates with the proximal end of the insertion channel 50 and penetrates the side wall of the insertion channel 50. Specifically, the clamping port 60 penetrates the side wall of the anvil face 31 of the anvil 30.

[0108] Therefore, when the separate piece 200 needs to be installed to the surgical instrument 100, the insertion portion 222 of the separate piece 200 is aligned with the insertion channel 50, and the separate piece 200 is pushed in the direction from the distal end to the proximal end. During the pushing process, the insertion channel 50 abuts against the inclined surface 246 of the second end 242 of the clamping portion 240, so that the clamping portion 240 is rotated against the elastic force provided by the supporting portion 250 until the second end 242 of the clamping portion 240 and the insertion portion 222 are smoothly inserted into the insertion channel 50. The separate piece 200 is continuously pushed until the second end 242 of the clamping portion 240 is aligned with the clamping port 60. The second end 242 of the clamping portion 240 is reversely rotated under the action of the elastic force provided by the supporting portion 250, the second end 242 protrudes from the second side surface 227 of the insertion portion 222 and is clamped into the clamping port 60, and the separate piece 200 is installed in place.

[0109] The side wall of the insertion channel 50, specifically, the side wall of the insertion channel 50 located at the anvil face 31 of the anvil 30 includes a first hollow portion 51 and a second hollow portion 52 which communicate with the clamping port 60. The second hollow portion 52 is located at the distal end relative to the first hollow portion 51, the width of the second hollow portion 52 is greater than that of the first hollow portion 51, and the width of the clamping port 60 is greater than that of the first hollow portion 51.

[0110] The second hollow part 52 is wider, which makes the insertion of the separating piece 200 easier. When the separating piece 200 moves in the second hollow part 52, the clamping part 240 does not need to rotate against the elasticity of the supporting part 250, and the supporting part 250 does not need to deform, which prolongs the service life of the separating piece 200 and avoids the increase of resistance caused by the contact between the clamping part 240 and the second hollow part. When the inclined surface 246 of the second end 242 of the separating piece 200 contacts the first hollow part 51, the second end 242 of the clamping part 240 will rotate against the elasticity of the supporting part 250 and move inside the first hollow part 51. When the second end 242 of the clamping part 240 aligns with the clamping interface 60, the clamping surface 244 of the clamping part 240 can abut against the side wall of the first hollow part 51 of the clamping interface 60, and the second end 242 of the clamping part 240 reversely rotates and protrudes from the second side surface 227 under the elastic force of the supporting part 250, so that the second end 242 is smoothly clamped into the clamping interface 60, and the separating piece 200 is installed in place.

[0111] It can be seen that the reasonable design of the first hollow part 51 and the second hollow part 52 not only prolongs the service life of the separating piece 200, but also makes the installation of the separating piece 200 easier.

[0112] The length of the second hollow part 52 is greater than that of the first hollow part 51. That is, during the movement of the clamping part 240 in the longer second hollow part 52, the clamping part 240 does not need to rotate against the elasticity of the supporting part 250, and the supporting part 250 does not deform, thereby prolonging the service life of the separating piece 200.

[0113] The width of the first hollow part 51 is equal to the width of the tool path groove 33. The tool path groove 33, the clamping interface 60, the first hollow part 51, and the second hollow part 52 are coaxially arranged, which can ensure that the position of the separating piece 200 after installation is appropriate and does not deviate from the central axis, thereby facilitating the doctor to operate the separating piece.

[0114] The second hollow part 52, the first hollow part 51, the clamping interface 60, and even the tool path groove 33 form a channel groove extending from the distal end to the proximal end of the side wall of the insertion channel 50.

[0115] The distal end of the nail abutting seat 30 is provided with a first wedge-shaped part 39 having a first inclined surface 38, and the proximal end of the working part 230 is provided with a second wedge-shaped part 239 having a second inclined surface 238. After the separating piece 200 is installed in the nail abutting seat 30, the first inclined surface 38 abuts against the second inclined surface 238.

[0116] The first inclined surface 38 and the second inclined surface 238 abut, so that the first wedge-shaped portion 39 and the second wedge-shaped portion 239 are superimposed, which can make the separating element 200 more reliably mounted on the nail abutment 30. At the same time, the first wedge-shaped portion 39 can make the distal end of the nail abutment 30 thinner than other parts, and the second wedge-shaped portion 239 can make the proximal end of the working portion thinner than other parts. That is, even if the first wedge-shaped portion 39 and the second wedge-shaped portion 239 are superimposed, the size of the joint will not be significantly increased. On the one hand, superimposition makes installation reliable, and on the other hand, superimposition does not significantly increase the size, and the design is very reasonable.

[0117] The second hollowed portion 52 is arranged on the first inclined surface 38. The mounting portion 220 extends from the second inclined surface 238 in the direction towards the proximal end, and the structure is compact and the design is reasonable.

[0118] The combined thickness of the first wedge-shaped portion 39 and the second wedge-shaped portion 239 is equivalent to the thickness of the nail abutment 30 at the proximal end adjacent to the first inclined surface 38, and / or equivalent to the thickness of the separating element at the distal end adjacent to the second inclined surface 238.

[0119] The thickness is equivalent, that is, the thickness is approximately equal, which avoids steps at the junction of the separating element 200 and the nail abutment 30, thereby avoiding scratching the tissue.

[0120] As described above, the separating element 200 includes the mounting portion 220 and the working portion 230, and the working portion 230 is used to separate tissue.

[0121] The working portion 230 includes a proximal end 231 and a distal end 232, and the width of the working portion 230 gradually decreases in the direction from the proximal end 231 towards the distal end 232. When the working portion 230 separates tissue, the narrower distal end 232 is preferentially in contact with the tissue, and the narrower distal end 232 can be conveniently inserted into the tissue and separate the target tissue from other tissues, and the operation is more convenient.

[0122] At least a portion of the working portion 230 extends in an arc from the proximal end 231 towards the distal end 232, and the working portion 230 has an arc-shaped working surface 234. The arc-shaped working surface 234 can make the working portion 230 smoothly pass through the gap between the target tissue and other tissues when separating the tissue, and better guide the end effector 18 to pass through the gap between the target tissue and other tissues, so that the operation of the separating element 200 and the surgical instrument 100 is more convenient.

[0123] The working portion 230 extends in an arc, and the working surface 234 extends in an arc, so that the back surface of the working portion 230 also extends in an arc. The working portion 230 has a regular structure and an aesthetic appearance.

[0124] The outer contour lines of the working portion 230 and the mounting portion 220 of the separating element 200 have no obvious edges, and all the contour lines are rounded, which can prevent the edges from cutting the tissue.

[0125] As described above, the separating piece 200 is mounted at the distal end of the surgical instrument 100. The surgical instrument 100 has a mounting end for mounting the separating piece 200, and the separating piece 200 further comprises a resilient piece 280 which abuts against the end face of the mounting end. Specifically, the resilient piece 280 abuts against the distal end face of the anvil seat 30.

[0126] Since the distal end face of the mounting end is hard and the resilient piece 280 is soft and deformable, when the resilient piece 280 abuts against the distal end face of the mounting end, not only can the distal end face of the mounting end be prevented from scratching the tissue, but also the risk of the tissue being clamped in the gap between the distal end face of the mounting end and the separating piece 200 can be reduced, thus avoiding unnecessary pulling of the tissue and preventing damage to the tissue.

[0127] The outer surface of the resilient piece 280 protrudes from or is flush with the outer surface of the mounting end. Specifically, the anvil seat has an anvil face 31 and a back face 32, and in this embodiment, the outer surface of the resilient piece 280 is preferably flush with or protrudes from the back face 32 of the anvil seat 30. When the target tissue is peeled from other tissues, since the mounting end on the side of the back face 32 of the anvil seat 30 is prone to scratch the other tissues, the outer surface of the resilient piece 280 being flush with or protruding from the back face 32 of the anvil seat 30 can maximize the prevention of the distal end face of the mounting end from scratching the tissue and minimize the risk of the tissue being clamped in the gap between the distal end face of the mounting end and the separating piece 200.

[0128] The separating piece 200 is provided with a slot 290. The mounting end has a first outer surface 91, and the separating piece 200 has a second outer surface 202. When the separating piece 200 is in the first state, the slot 290 is located at the joint of the first outer surface 91 and the second outer surface 202, and the resilient piece 280 is arranged in the slot 290. The slot 290 can better mount the resilient piece 280 without affecting the function of the resilient piece 280.

[0129] The outer surface of the resilient piece 280 protrudes from or is flush with the second outer surface 202. The slot 290 can better mount the resilient piece 280, but there is a risk of scratching the tissue at the proximal end and / or the distal end of the slot 290. By making the outer surface of the resilient piece 280 protrude from or be flush with the second outer surface 202, not only is the mounting of the resilient piece 280 facilitated, but also the tissue can be prevented from being scratched.

[0130] The resilient piece 280 is shaped to match the shape of the slot 290, which can maximize the prevention of scratching the tissue. The resilient piece 280 is in interference fit with the slot 290, which not only makes the mounting of the resilient piece 280 reliable, but also facilitates the resilient piece 280 to protrude from the surface adjacent thereto, thereby maximizing the prevention of scratching the tissue.

[0131] The slot 290 extends in the circumferential direction. This can make the mounting of the elastic member 280 more reliable.

[0132] The bottom surface of the slot 290 is uneven, specifically, the bottom surface of the slot includes recesses and / or protrusions, which can increase the friction between the slot 290 and the elastic member 280, so that the elastic member 280 can be reliably mounted in the slot 290.

[0133] The bottom surface of the slot 290 is symmetrically arranged with respect to the center symmetry plane of the longitudinal direction of the separating member 200. The structure is regular, and the elastic member 280 is uniformly stressed, which better plays a role in preventing tissue from being scratched.

[0134] In the present embodiment, the elastic member 280 is an independently formed component, and the elastic member 280 is arranged in the slot 290 by manual mounting. Those skilled in the art can conceive that the elastic member 280 can also be formed by spraying plastic in the slot 290, and any solution identical or similar to the present embodiment is covered by the protection scope of the present application.

[0135] Please refer to Figures 7 to 13 The present embodiment also provides a packaging box 300 for the separating member 200, and the separating member 200 can be accommodated in the packaging box 300. The packaging box 300 provides an outer package for the separating member 200, which facilitates the transportation and storage of the separating member 200. The separating member 200 and the packaging box 300 form an assembly, which can be sold and purchased separately, or can be sold and purchased together with the surgical instrument 100 to form a surgical kit. Regardless of the way of selling and purchasing, the needs of doctors to strip target tissues can be met. Of course, the separating member 200 of the present embodiment can also be sold and purchased separately.

[0136] The packaging box 300 includes an accommodation portion 320 for accommodating the separating member 200, and the separating member 200 can be accommodated in the packaging box 300 by being inserted into the accommodation portion 320. The packaging box 300 includes a shell 350, and one side surface of the shell 350 is inwardly recessed to form an open accommodation portion 320. The accommodation portion 320 has an open end, which facilitates the loading of the separating member 200 into the packaging box 300 or the removal of the separating member 200 from the packaging box 300.

[0137] The accommodation portion 320 has a closed end 330 arranged at a distance from the open end. The shape of the closed end 330 can match the shape of the distal end 232 of the separating member 200, or the shape of the closed end 330 can not match the shape of the distal end 232 of the separating member 200, as long as the closed end 330 can limit the insertion of the separating member 200. Therefore, during the insertion of the separating member 200 into the accommodation portion 320, when the distal end 232 of the separating member 200 abuts against the closed end 330 of the accommodation portion 320, the operator can perceive that the separating member 200 has been accommodated in place.

[0138] The accommodation portion 320 is provided with a protruding rib 324, which is provided with a guide surface 326 along which the separation piece 200 slides into the accommodation portion 320. The guide surface 326 can make the separation piece 200 more easily and accurately inserted into the accommodation portion 320.

[0139] The protruding rib 324 is also provided with an abutting surface 328, which intersects with the guide surface 326 and is arranged at an angle, specifically an obtuse angle. The abutting surface 328 is close to the closed end 330 of the accommodation portion 320 relative to the guide surface 326, and limits the separation piece 200. Specifically, when the separation piece 200 is loaded into the accommodation portion 320, the abutting surface 328 abuts with part of the working surface 234 of the separation piece 200, so that the separation piece 200 is more reliably accommodated in the accommodation portion 320.

[0140] As can be seen, the protruding rib 324 not only defines the size of the accommodation portion 320, but also guides the operation of sliding the separation piece 200 into the accommodation portion 320. After the separation piece 200 is slid into the accommodation portion 320, the protruding rib 324 also limits the separation piece 200, and the structure design is very reasonable.

[0141] Please refer to Figure 11 , the surface of the accommodation portion 320 is provided with a protruding portion 322. The protruding portion 322 can support the working portion 230 of the separation piece 200, and also can reduce the contact area between the working portion 230 and the accommodation portion 320, so that the insertion and removal operation of the separation piece 200 is more easily. In the embodiment, the protruding portion 322 is longitudinally extended and substantially strip-shaped, and the protruding portion 322 extends along the longitudinal direction. Those skilled in the art can think of other shapes of the protruding portion 322.

[0142] As described above, the separation piece 200 includes a resilient piece 280 which abuts with the end surface of the mounting end of the surgical instrument 100. Preferably, the outer surface of the resilient piece 280 protrudes from the outer surface of the working portion 230 of the separation piece 200, so that the resilient piece 280 elastically abuts with the inner surface of the accommodation portion 320.

[0143] During the process of inserting the separation piece 200 into the accommodation portion 320 of the packaging box 300, when the resilient piece 280 elastically abuts with the inner surface of the accommodation portion 320, the operator can perceive the damping effect, which provides the operator with operation feedback, and the operator can confirm whether the separation piece 200 is accommodated in place through the feedback. That is, in addition to the closed end 330 enabling the operator to perceive that the separation piece 200 has been inserted in place, the resilient piece 280 elastically abutting with the inner surface of the accommodation portion 320 further provides feedback for the operator, further improving the operation experience. Moreover, the friction between the resilient piece 280 and the inner surface of the accommodation portion 320 can prevent the separation piece 200 from falling off from the accommodation portion 320.

[0144] As mentioned above, the separating piece 200 is detachably connected with the surgical instrument 100 through the cooperation mechanism, and the separating piece 200 is switched between the first state and the second state, in the first state, the separating piece 200 is connected with the surgical instrument 100; in the second state, the separating piece 200 is disconnected with the surgical instrument 100.

[0145] In the embodiment, preferably, the packaging box 300 not only can accommodate the separating piece 200, but also can switch the separating piece 200 between the first state and the second state. That is, the packaging box 300 not only can provide packaging for the separating piece 200, but also can be used as a disassembly tool of the separating piece 200 relative to the surgical instrument 100, and the design is very ingenious.

[0146] Specifically, the packaging box 300 comprises an operating piece 340, the operating piece 340 acts on the cooperation mechanism to switch the separating piece 200 from the first state to the second state. More specifically, the operating part 342 acts on the clamping mechanism to switch the separating piece 200 from the first state to the second state.

[0147] The operating piece 340 comprises the operating part 342 and the driving part 348 connected with each other, the operating part 342 is pressed by the operator, and the driving part 348 acts on the clamping mechanism to switch the separating piece 200 from the first state to the second state.

[0148] The operating part 342 performs a first motion to drive the driving part 348 to perform a second motion, so as to switch the separating piece 200 from the first state to the second state. Wherein, the first motion comprises rotation; the second motion comprises rotation.

[0149] The packaging box 300 comprises a shell 350, the shell 350 is partially inwardly recessed to form the accommodating part 320, the shell 350 comprises a first side wall 351 and a second side wall 352 surrounding the accommodating part 320, and the first side wall 351 and the second side wall 352 have a gap 353 therebetween, and the first side wall 351 forms the operating part 342. The gap 353 extends longitudinally from one end of the shell 350 to the other end in the direction, and the extension length of the gap 353 is less than the extension length of the shell 350. Due to the existence of the gap 353, the first side wall 351 can move relative to the second side wall 352, so as to drive the driving part 348 to move and finally act on the separating piece 200 to switch the separating piece 200 from the first state to the second state. Moreover, the first side wall 351 is a part of the shell 350, and a part of the shell 350 forms the operating part 342, without the need to additionally set other components to form the operating part 342, the structure is simple, and the design is reasonable.

[0150] The operation part 342 rotates to drive the driving part 348 to rotate. Specifically, the first side wall 351 includes a connecting end 344 and a free end 346, and the driving part 348 is connected to the free end 346. The free end 346 rotates around the joint of the connecting end 344 and the second side wall to drive the driving part 348 to rotate. Without additional components, the structure is simple and convenient to operate.

[0151] The rotation axis of the free end 346 is perpendicular to the central symmetry plane of the longitudinal direction of the packaging box 300. The rotation axis of the free end 346 is also parallel to the rotation axis of the clamping part 240. The assembly structure formed by the separating piece 200 and the packaging box 300 is regular.

[0152] The connecting end 344 of the operation part 342 is made of elastic material. Optionally, the operation part 342 is made of elastic material as a whole. Thus, when the free end 346 is pressed, the connecting end 344 deforms to make the free end 346 rotate around the joint of the connecting end 344 and the second side wall. Thus, the doctor can drive the driving part 348 to move by overcoming the elastic force of the operation part 342 itself to switch the separating piece 200 from the first state to the second state. The structure of the packaging box 300 can be made simpler by using the elasticity of the operation part 342 itself. The elasticity of the operation part 342 itself makes the free end 346 remain in the raised state without external force, as shown in Figure 8 、 Figure 11 、 Figure 12

[0153] The operation part 342 and the driving part 348 are both longitudinally extended, and the extension directions of the operation part 342 and the driving part 348 are perpendicular to each other. The operation part 342 and the driving part 348 which are longitudinally extended and have extension directions perpendicular to each other provide sufficient stroke, so that the driving part 348 can effectively drive the clamping part 240, so that the separating piece 200 can be smoothly separated from the surgical instrument 100.

[0154] The operation part 342 and the driving part 348 are connected, and the two cooperate to complete the abutment of the clamping part 240. The operation part 342 and the driving part 348 are two independent components. Specifically, the driving part 348 is a pin, and the pin is tightly fitted with the hole on the operation part 342 to realize the connection between the driving part 348 and the operation part 342. Those skilled in the art can think that the operation part 342 and the driving part 348 can also be integrally formed.

[0155] As shown in Figure 11 、 12 ​As shown, the housing 350 is provided with an opening 354 through which the driving portion 348 passes. The opening 354 is arranged opposite the driving portion 348, so that when the driving portion 348 is installed, the driving portion 348 passes through the opening 354 and is connected to the operating portion 342, and the opening 354 facilitates the installation of a tool to exert force on the driving portion 348, and the structure design is reasonable. The driving portion 348 is connected to the free end 346 of the operating portion 342, and correspondingly, the opening 354 is opposite the free end 346 of the operating portion 342, and the layout is reasonable.

[0156] The width of the driving portion 348 is less than the width of the channel groove (including the second hollow portion 52, the first hollow portion 51, and the clamping port 60) on the nail abutment 30. During the disengagement of the separating piece 200 from the surgical instrument 100, the driving portion 348 can move in the channel groove and maintain the state of pressing the second end 242 of the clamping portion 240.

[0157] Therefore, the operating member 340 acts on the clamping mechanism to switch the separating piece 200 from the first state to the second state.

[0158] The distal end of the accommodating portion 320 is closed to form a closed end 330. When the separating piece 200 is installed to the surgical instrument 100, the packaging box 300 containing the separating piece 200 moves towards the surgical instrument 100, and the closed end 330 pushes the separating piece 200 to insert into the surgical instrument 100. Therefore, the closed end 330 of the accommodating portion 320 of the packaging box 300 pushes the separating piece 200 to switch from the second state to the first state.

[0159] The packaging box 300 is made of transparent material, which not only looks beautiful, but also is very convenient for the operator to observe whether the disassembly operation is in place when disassembling the separating piece 200 by using the packaging box 300.

[0160] The application scenarios of the separating piece 200 of the present embodiment are described below.

[0161] After the separating piece 200 is factory-finished and before it is used, the separating piece 200 is located in the accommodating portion 320 of the packaging box 300, and the elastic member 280 on the separating piece 200 elastically abuts the inner side surface of the accommodating portion 320. The separating piece 200 is kept in the packaging box 300 under the elastic force of the elastic member 280.

[0162] When the physician needs to use the dissection member 200 to dissect tissue during use of the surgical instrument 100, the physician holds the housing 350 of the package 300 so that the mounting portion 220 of the dissection member 200 is aligned with the insertion channel 50 provided on the anvil 30 of the end effector 18 of the surgical instrument 100, and pushes the package 300 in a direction towards the surgical instrument 100. During the pushing, the insertion portion 222 and the clamping portion 240 of the dissection member 200 move along the insertion channel 50 until the second end 242 of the clamping portion 240 is aligned with and clamped into the clamping port 60. At this time, the dissection member 200 has been mounted to the surgical instrument 100.

[0163] Subsequently, the physician overcomes the friction between the elastic member 280 and the inner side surface of the receiving portion 320 due to the elastic force of the elastic member 280, and pulls the package 300 in a direction away from the surgical instrument 100, so that the package 300 is separated from the dissection member 200. The physician can use the dissection member 200 to dissect the target tissue. Specifically, the distal end 232 of the working portion 230 of the dissection member 200, which has a relatively narrow width, is aligned with the interface between the target tissue and other tissue, and the surgical instrument 100 and the dissection member 200 are pushed forward until the dissection member 200 separates the target tissue from the other tissue.

[0164] After the dissection member 200 separates the target tissue from the other tissue, the physician moves the surgical instrument 100 in a direction towards the distal end 232, so that the target tissue enters between the anvil 30 and the cartridge seat. Subsequently, the physician can use the surgical instrument 100 to cut and suture the target tissue.

[0165] When the doctor does not need to separate the tissue during the use of the surgical instrument 100, the doctor can remove the separating piece 200 from the surgical instrument 100, so as to avoid the space occupation of the separating piece 200 and affect the other operations of the surgical instrument 100 in the case that the separating piece 200 is not needed. Specifically, the doctor moves the packaging box 300 to align the separating piece 200, so as to accommodate the separating piece 200 in the accommodating portion 320 of the packaging box 300. Then, the doctor presses the free end 346 of the operation portion 342, and the free end 346 rotates around the connecting end 344 to drive the driving portion 348 to rotate, until the driving portion 348 abuts against the inclined surface 246 or the top surface 248 of the second end 242 of the clamping portion 240. The doctor continues to press the free end 346 of the operation portion 342, and the driving portion 348 drives the second end 242 of the clamping portion 240 to rotate against the force of the supporting portion 250, until the second end 242 of the clamping portion 240 is separated from the clamping interface 60. Then, the doctor pulls the packaging box 300 away from the surgical instrument 100, so that the inserting portion 222 of the separating piece 200 is separated from the inserting channel 50, and the separating piece 200 is separated from the surgical instrument 100. The separating piece 200 after being separated from the surgical instrument 100 is located in the accommodating portion 320 of the packaging box 300, and returns to the state before being used. It should be noted that after the driving portion 348 separates the second end 242 of the clamping portion 240 from the clamping interface, the driving portion 348 keeps pressing the second end 242 of the clamping portion 240. That is, during the process that the separating piece 200 is separated from the surgical instrument 100, the driving portion 348 always presses the second end 242 of the clamping portion 240 and applies force to the second end 242. The driving portion 348 moves in the channel groove, and finally separates the separating piece 200 from the surgical instrument 100 by means of the packaging box 300.

[0166] Figures 16 to 17 The separating piece 200a for cooperating with the surgical instrument provided by the second embodiment of the present application is shown.

[0167] The difference between the separating piece 200a of the present embodiment and the separating piece of the first embodiment will be described below.

[0168] In the first embodiment, the elastic member extends circumferentially in a ring shape, and the ring-shaped elastic member is installed in the slot between the separating piece and the distal end surface of the anvil.

[0169] In the present embodiment, the elastic member 280a is in a bag shape, and at least a part of the working portion 230a is accommodated in the elastic member 280a. The shape of the at least a part of the working portion 230a is the same as that of the elastic member 280a. Specifically, the working portion 230a is accommodated in the elastic member 280a from the distal end to the portion adjacent to the mounting end of the surgical instrument. The end surface of the proximal end opening of the elastic member 280a abuts against the distal end surface of the mounting end, so as to avoid scratching the tissue by the distal end surface of the mounting end.

[0170] Figure 18A separate piece for use with a surgical instrument according to a third embodiment of the present application is shown.

[0171] The difference between the separate piece 200b of the present embodiment and the separate piece of the first embodiment is described below.

[0172] In the first embodiment, the first end of the clamping portion includes a pivot, the pivot is integrally formed with the rest of the clamping portion, the insertion portion is provided with an open shaft hole, the pivot portion is received in the shaft hole, and the support portion covers the open part of the shaft hole, so that the second end of the clamping portion can rotate around the pivot.

[0173] In the present embodiment, the separate piece 200b includes a separate pivot 234b, the first end of the clamping portion 240b is provided with a pin hole 299b through which the pivot 234b passes, and the mounting portion of the separate piece 200b is provided with a circular hole 298b corresponding to the two ends of the pin hole 299b, the pivot 234b passes through the first circular hole 298b, the pin hole 299b, and the second circular hole 298b in sequence, so that the first end of the clamping portion 240b is rotatably mounted on the mounting portion. The pivot 234b is tightly fitted with the first circular hole 298b and / or the second circular hole 298b to prevent it from falling off.

[0174] In addition, in the present embodiment, the shape of the elastic member 280b of the separate piece 200b and the cooperation mechanism between the elastic member 280b and the working portion 230b are the same as those of the second embodiment, and will not be described again.

[0175] Figures 19 to 20 A separate piece for use with a surgical instrument according to a fourth embodiment of the present application is shown.

[0176] The difference between the separate piece 200c of the present embodiment and the separate piece of the third embodiment is described below.

[0177] In the third embodiment, the mounting portion of the separate piece is provided with a connecting portion at the distal side adjacent to the first end of the clamping portion, the first part of the support portion is connected with the connecting portion, the support portion extends from the connecting portion toward the proximal end, and the support portion exerts a force on the clamping portion relative to the second part located at the proximal end, so that the clamping portion has a tendency to be clamped into the clamping port of the surgical instrument.

[0178] In the present embodiment, the support portion 250c is located close to the proximal end of the clamping portion 240c, the proximal end of the support portion 250c is connected with the mounting portion 220c by welding or the like, the support portion 250c is elastic, and the distal end of the support portion 250c exerts a force on the second end of the clamping portion 240c, so that the clamping portion 240c has a tendency to be clamped into the clamping port 60c on the surgical instrument.

[0179] Figures 21 to 22 A separate piece for use with a surgical instrument according to a fifth embodiment of the present application is shown.

[0180] The difference between the separating piece 200d of the present embodiment and the separating piece of the second embodiment will be described below.

[0181] In the second embodiment, the clamping portion itself is not elastic, and the supporting portion provides elastic force to the clamping portion so that the clamping portion has a tendency to be clamped into the clamping port of the surgical instrument.

[0182] In the present embodiment, the clamping portion 240d itself is at least partially made of elastic material, and the clamping portion 240d itself has a tendency to be clamped into the clamping port of the surgical instrument. That is, no additional elastic body is arranged to provide elastic force to the clamping portion 240d, and the structure is simpler.

[0183] In the present embodiment, the proximal end of the clamping portion 240d is connected to the mounting portion 220d of the separating piece 200d, the clamping portion 240d is deformed, the distal end of the clamping portion 240d rotates around the proximal end, so that the clamping portion 240d is clamped into or separated from the clamping port, and finally the separating piece 200d is switched between the first state and the second state. It should be noted that no additional rotating shaft is arranged at the proximal end, and the distal end rotates around the connection between the proximal end and the mounting portion 220d.

[0184] As can be seen, the structure of the separating piece 200d of the present embodiment is simpler, and the cost is lower.

[0185] Figures 23 to 26 A separating piece for use with a surgical instrument provided by the sixth embodiment of the present application is shown.

[0186] The difference between the separating piece 200e of the present embodiment and the separating piece of the fifth embodiment will be described below.

[0187] In the fifth embodiment, the clamping portion is arranged on the front surface (the second side surface) of the mounting portion of the separating piece, and the clamping portion cooperates with the clamping port arranged on the surgical instrument.

[0188] In the present embodiment, the clamping portion 240e is arranged on the back surface of the mounting portion 220e of the separating piece 200e, the clamping port 60e is arranged on the back surface 32e of the anvil seat 30e, and the clamping portion 240e arranged on the back surface of the mounting portion 220e cooperates with the clamping port 60e arranged on the back surface 32e of the anvil seat 30e, so as to achieve detachable connection between the separating piece 200e and the surgical instrument.

[0189] Since the clamping port 60e is arranged on the back surface 32e of the anvil seat 30e and is not affected by the cartridge seat, the operating member of the packaging box can be operated on the back surface 32e of the anvil seat 30e to achieve mounting and dismounting of the separating piece 200e. The operation space is larger, and the operation is more convenient.

[0190] The distal end of the clamping portion 240e is connected to the separation piece 200e by welding or the like, and the clamping portion 240e itself has elasticity, thereby realizing switching between the first state and the second state, which will not be described again.

[0191] Figures 27 to 29 The separation piece used in cooperation with the surgical instrument according to the seventh embodiment of the present application is shown.

[0192] The difference between the separation piece 200f of the present embodiment and the separation piece of the fifth embodiment will be mainly described below.

[0193] In the fifth embodiment, the proximal end of the clamping portion is fixed to the mounting portion of the separation piece, and the distal end of the clamping portion is fitted to the clamping interface of the surgical instrument.

[0194] In the present embodiment, the distal end of the clamping portion 240f is fixed to the part of the separation piece 200f other than the clamping portion 240f, and the proximal end of the clamping portion 240f is fitted to the clamping interface of the surgical instrument.

[0195] In the present embodiment, the separation piece 200f is provided with a receiving cavity 297f extending from the proximal end of the mounting portion toward the working portion, and the receiving cavity 297f is partially located in the working portion. The distal end of the receiving cavity 297f is provided with a mounting shaft 296f extending vertically, and the clamping portion 240f is provided with a mounting hole capable of being sleeved on the mounting shaft 296f. The mounting hole and the mounting shaft 296f cooperate to realize the fitting of the distal end of the clamping portion 240f to the separation piece 200f. The proximal end of the clamping portion 240f can rotate relative to the distal end to realize the clamping and disengagement of the clamping interface.

[0196] It should be noted that, in the present embodiment, although the mounting shaft 296f is a cylindrical shaft and the mounting hole is a circular hole, the clamping portion 240f does not rotate around the axis of the mounting shaft 296f. The rotation axis of the clamping portion 240f is parallel to the working surface of the separation piece 200f, like the previous embodiments.

[0197] In summary, in the present application, the doctor first uses the separation piece to separate the target tissue from other tissues, and then moves the surgical instrument forward to make the target tissue enter between the staple cartridge seat and the anvil seat, and operates the surgical instrument to cut and suture the target tissue. The doctor's operation is more convenient by using the separation piece to separate the target tissue. Moreover, the clamping mechanism enables the separation piece to be elastically fitted to the surgical instrument, and the connection is reliable and convenient to disassemble and assemble.

[0198] In the present application, the elastic body abuts against the end face of the mounting end, which can maximize the risk of scratching the tissue by the distal end face of the mounting end and minimizing the risk of the tissue being clamped in the gap between the distal end face of the mounting end and the separation piece.

[0199] The packaging box can not only provide packaging for the separated parts, but also can be used as a dismounting tool for the separated parts relative to the surgical instrument, and the design is very ingenious. In the application, the elastic body can not only avoid scratching the tissue, but also prevent the separated parts from accidentally falling off when the separated parts are stored in the packaging box.

[0200] It should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0201] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not used to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A separator for a surgical instrument, characterized in that: The separator includes a connected mounting portion and a working portion, the mounting portion and the surgical instrument are detachably mounted via a mating mechanism, the working portion is used to peel off tissue, the mating mechanism includes a snap-fit ​​mechanism, the snap-fit ​​mechanism includes a snap-fit ​​portion provided on the mounting portion, the snap-fit ​​portion is elastically coupled to or disengaged from the surgical instrument, and thus the snap-fit ​​mechanism enables the separator to be elastically coupled to or disengaged from the surgical instrument, so that the mounting portion and the surgical instrument can be detachably mounted.

2. The separator according to claim 1, wherein: The clamping mechanism also includes a clamping interface provided on the surgical instrument. In a first state, the clamping portion is clamped into the clamping interface under the action of elastic force to achieve the elastic matching; in a second state, the clamping portion overcomes the elastic force and disengages from the clamping interface.

3. The separator according to claim 2, wherein: The clamping portion has a first end and a second end, the first end is connected to the mounting portion, and the second end is elastically coupled to or detached from the clamping interface.

4. The separator according to claim 3, wherein: The second end rotates around the first end.

5. The separator according to claim 4, characterized in that: The first end includes a rotating shaft, the mounting portion is provided with a shaft hole, and the rotating shaft is received in the shaft hole.

6. The separator according to claim 5, characterized in that: The shaft hole is partially open, and a portion of the rotating shaft is received in the shaft hole.

7. The separator according to claim 6, characterized in that: The separating member further includes a supporting portion having a first portion and a second portion, wherein the first portion is connected to the mounting portion and covers the shaft hole, and the second portion abuts against the clamping portion to elastically support the clamping portion.

8. The separator according to claim 4, wherein: The axis of rotation is perpendicular to the central symmetry plane in the longitudinal direction of the separator.

9. The separator according to claim 3, wherein: In the first state, the second end protrudes from the surface of the mounting portion.

10. The separator according to claim 3, wherein: The second end includes a clamping surface and an inclined surface arranged at an angle to the clamping surface, and the clamping surface extends vertically.

11. The separator according to claim 10, wherein: The second end further includes a top surface arranged between the clamping surface and the inclined surface.

12. The separator according to claim 2, wherein: The mounting portion is provided with an accommodating space, and part of the clamping portion is accommodated in the accommodating space.

13. The separator according to claim 12, wherein: The accommodating space includes an opening penetrating the mounting portion, and in the first state, the second end of the clamping portion protrudes from the opening.

14. The separator according to claim 12, wherein: The separating member further includes an elastic body abutting against the clamping portion, and at least a portion of the elastic body is accommodated in the accommodating space.

15. The separator according to claim 2, wherein: The separating member further includes an elastic body abutting against the clamping portion, and the elastic body abuts against the clamping portion to elastically support the clamping portion.

16. The separator according to claim 15, wherein: The elastic body is a supporting portion, at least a portion of which is made of elastic material. The supporting portion has a first portion and a second portion. The first portion is connected to the mounting portion, and the second portion abuts against the clamping portion.

17. The separator according to claim 16, wherein: The separating member further includes another elastic body arranged between the supporting portion and the clamping portion.

18. The separator according to claim 2, wherein: At least a portion of the clamping portion is made of elastic material.

19. The separator according to claim 2, wherein: The matching mechanism further includes a plug-in mechanism, which includes a plug-in portion provided on the separating piece and a plug-in channel provided on the surgical instrument. The plug-in portion and the clamping portion are inserted into the surgical instrument along the plug-in channel.

20. The separator according to claim 19, wherein: The insertion channel extends from the distal end of the surgical instrument in a direction toward the proximal end. The card interface is communicated with the distal end of the insertion channel and passes through a side wall of the insertion channel.

21. The separator according to claim 20, wherein: The side wall is provided with a first hollow portion and a second hollow portion which are sequentially connected to the distal end of the card interface. The width of the second hollow portion is greater than that of the first hollow portion. The width of the card interface is greater than that of the first hollow portion.

22. The separator according to claim 21, wherein: The card interface, the first hollow portion, and the second hollow portion are coaxially arranged.

23. The separator according to claim 1, wherein: The surgical instrument is a stapler, and the separating piece is detachably mounted on an end effector of the stapler.

24. The separator according to claim 23, wherein: The separating piece is detachably mounted to the anvil of the end actuator.

25. The separator according to claim 24, characterized in that: The clamping mechanism includes a clamping portion arranged on the separating piece and a clamping interface arranged on the pin support; the clamping portion is elastically matched with the clamping interface, and the clamping interface is arranged on the pin support surface or back surface of the pin support.

26. The separator according to claim 24, wherein: The distal end of the anvil is provided with a first wedge-shaped portion, which has a first inclined surface; the proximal end of the working portion is provided with a second wedge-shaped portion, which has a second inclined surface; after the separator is installed on the anvil, the first inclined surface abuts against the second inclined surface.

27. The separator according to claim 26, wherein: The combined thickness of the first wedge-shaped portion and the second wedge-shaped portion is approximately equal to the thickness of the pin seat at the proximal end adjacent the first bevel, and / or is approximately equal to the thickness of the separator at the distal end adjacent the second bevel.

28. The separator according to claim 26, wherein: The mounting portion extends from the second inclined surface in a direction toward the proximal end.

29. The separator according to claim 1, wherein: The working portion includes a proximal end and a distal end, and a width of the working portion gradually decreases in a direction from the proximal end toward the distal end.

30. A surgical instrument comprising an end effector, characterized in that :The end actuator is equipped with a separation piece as described in any one of claims 1 to 29.

Images