Surgical instruments

Abstract

The present invention discloses a surgical instrument, comprising: a jaw assembly, a steering structure, a sleeve assembly, a motion conversion structure and a locking member, wherein the steering structure comprises an angle steering member, the angle steering member has an outer peripheral surface, the angle steering member comprises a wall portion and a matching portion, the outer peripheral surface is arranged on the outer side of the wall portion, and the matching portion is arranged on the inner side of the wall portion; the sleeve assembly comprises an outer sleeve, and the outer sleeve is connected to the locking member through a motion conversion structure; when the outer sleeve is located at a proximal position, the jaw assembly is in an open state, and the locking member is in an unlocked state; when the outer sleeve moves to a distal position, the jaw assembly is driven to switch to a closed state, and the locking member is driven to move proximally to switch to a locked state through the motion conversion structure. The jaw assembly is closed to complete locking. The matching portion is arranged on the inner side of the angle steering member, so that the matching portion is extended along the radial direction of the angle steering member, and the extension direction of the matching portion is colinear with the matching direction of the locking member, so that the jaw assembly is stably locked.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a surgical instrument. Background Art

[0002] Surgical cutting staplers are commonly used medical instruments to replace manual suturing. Their main working principle is to use a cutting knife to separate tissues and titanium staples to staple them, similar to a stapler. There are many types of staplers according to their suitability for different parts of the body. For surgical cutting staplers, their working principle is to enter the patient's body through the cannula of the puncture device that is precisely positioned at the surgical site, and then make a longitudinal incision in the tissue and apply staples on the opposite side of the incision, thereby separating and staple the tissues.

[0003] The surgical instrument includes a jaw assembly, a cutting knife assembly and an operating assembly. The operating assembly is connected to the jaw assembly and the cutting knife assembly. When performing an operation, the medical staff operates the operating assembly to turn the jaw assembly to correspond to the tissue to be clamped. After the jaw assembly is rotated to a suitable position, the medical staff controls the jaw assembly to close and clamp the human tissue. During the operation, the jaw assembly needs to be rotated and locked after the jaws are closed to prevent the jaw assembly from moving and pulling the tissue when clamping the tissue. In the prior art, after the jaws are closed, the medical staff needs to operate to lock the jaw assembly, which is cumbersome, and if the locking is forgotten, the problem of pulling the tissue may occur.

[0004] In the prior art, locking teeth are provided on the outer circumference of the angle steering member, and the locking teeth are arranged along the radial direction of the angle steering member. The surgical instrument is also provided with a locking member. When the angle steering member rotates, the locking member corresponds to the locking teeth, and the jaw assembly is locked when the two cooperate. Limited by the width of the sleeve assembly, the two side surfaces of the angle steering member are generally linear, and the outer circumference includes linear walls on both sides and an arc-shaped wall in the middle. In surgical instruments with a large rotation angle of the jaw assembly, the locking teeth will inevitably be partially arranged on the linear walls, and the locking teeth located on the linear walls are not arranged along the radial direction of the angle steering member. When the angle steering member rotates to the point where the locking teeth located on the first side surface correspond to the locking member, the extension direction of the locking teeth is staggered with the cooperation direction of the locking member, and the cooperation is unstable, resulting in the jaw assembly being unable to be effectively locked. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a surgical instrument which can stably lock the jaw assembly when the jaws are closed to prevent the jaw assembly from rotating.

[0006] The present invention is implemented through the following technical solutions: A surgical instrument comprises: a jaw assembly, a steering structure, a sleeve assembly, a motion conversion structure and a locking member, wherein the jaw assembly is rotatably connected to the sleeve assembly through the steering structure;

[0007] The steering structure comprises an angle steering member, the angle steering member has an outer peripheral surface, the angle steering member comprises a wall portion and a matching portion, the outer peripheral surface is arranged on the outer side of the wall portion, and the matching portion is arranged on the inner side of the wall portion; the sleeve assembly comprises an outer sleeve, the outer sleeve is connected to the jaw assembly, and is connected to the locking member through the motion conversion structure; the locking member has a locked state and an unlocked state; in the locked state, the locking member is locked with the matching portion to prevent the jaw assembly from rotating relative to the sleeve assembly, and in the unlocked state, the locking member is unlocked with the matching portion, and the jaw assembly rotates relative to the sleeve assembly in response to being operated;

[0008] When the outer sleeve is located at the proximal position, the jaw assembly is in the open state and the locking element is in the unlocked state; when the outer sleeve moves from the proximal position to the distal position, the jaw assembly is driven to switch from the open state to the closed state, and the locking element is driven to move proximally through the motion conversion structure to switch the locking element to the locked state.

[0009] Furthermore, one of the mating part and the locking piece is provided with a locking tooth, and the other one is provided with a mating groove, the locking tooth mating with the mating groove to lock the mating part and the locking piece; the locking tooth is separated from the mating groove to unlock the mating part and the locking piece.

[0010] Furthermore, the matching parts are formed in plurality and arranged around the rotation axis of the angle steering member. When the locking member is in a locked state, the locking member matches with at least one of the matching parts.

[0011] Furthermore, the mating portion includes a first mating portion located at the head end and a second mating portion located at the tail end, and when the first mating portion is mated with the locking piece, the angle between the jaw assembly and the sleeve assembly is greater than or equal to 70°; when the second mating portion is mated with the locking piece, the angle between the jaw assembly and the sleeve assembly is greater than or equal to 70°.

[0012] Further, the surgical instrument includes a frame; the motion conversion structure includes a lever member, a rotating part, a first connecting part and a second connecting part, the lever member is connected to the rotating part and is rotatably connected to the frame through the rotating part, the first connecting part and the second connecting part are both connected to the lever member and are respectively located on both sides of the rotating part;

[0013] The outer sleeve is connected to the first connecting part, and the locking member is connected to the second connecting part; when the outer sleeve drives the first connecting part to move along a first direction, the lever member rotates around the rotating part, so that the second connecting part drives the locking member to move along a second direction, and the first direction is opposite to the second direction.

[0014] Furthermore, a distance between the second connecting portion and the rotating portion is smaller than a distance between the first connecting portion and the rotating portion.

[0015] Furthermore, the motion conversion structure includes two lever members, the rotating parts of the two lever members are coaxially arranged, the first connecting parts of the two lever members are connected by a first end rod, and the second connecting parts of the two lever members are connected by a second end rod, so that the two lever members move synchronously.

[0016] Furthermore, the first connecting part is movably connected to the outer sleeve via a guide structure. When the outer sleeve drives the first connecting part to move along the first direction, the first connecting part moves along with the outer sleeve along the first direction and moves relative to the outer sleeve to rotate around the rotating part.

[0017] Furthermore, the second connecting part is movably connected to the locking member via a guide structure, and when the second connecting part rotates around the rotating part, the locking member moves relative to the second connecting part, so that the second connecting part can only drive the locking member to move along the axial direction of the sleeve assembly.

[0018] Furthermore, the guide structure includes a movement rod and a movement slot, and the movement rod is movably disposed in the movement slot.

[0019] Furthermore, the motion conversion structure includes a gear, a first rack and a second rack, the first rack and the second rack are located on both sides of the gear and are meshed with the gear, the first rack is connected to the outer sleeve, and the second rack is connected to the locking piece, and when the outer sleeve drives the first rack to move in a first direction, the gear rotates to drive the second rack and the locking piece to move in a second direction, and the first direction is opposite to the second direction.

[0020] Furthermore, the surgical instrument also includes a steering drive assembly, which drives the steering structure to rotate when operated, thereby driving the jaw assembly to rotate.

[0021] Furthermore, the steering drive assembly includes an operating handle, a gear assembly and a push rod, the operating handle is connected to the gear assembly, the proximal end of the push rod is provided with connecting teeth, the connecting teeth are meshed with the gear assembly, and the distal end of the push rod is connected to the steering structure; in response to the rotation of the operating handle, the gear assembly drives the push rod to move through the connecting teeth, thereby driving the steering structure to rotate.

[0022] Furthermore, the steering drive assembly also includes a driving part, an elastic locking piece and a fixing part, the handle drives the gear assembly through the driving part, the fixing part has a locking tooth, the driving part has a matching tooth, the driving part is connected to the elastic locking part, when the driving part is in a locked position, the elastic locking piece is in an initial state, the matching tooth is engaged with the locking tooth to prevent the rotation of the driving part; when the driving part is in an unlocked position, the elastic locking piece is in a compressed state, the matching tooth is separated from the locking tooth, so that in response to the rotation of the driving part, the gear assembly drives the push rod to move.

[0023] Compared with the prior art, the beneficial effect of the present invention is that the locking of the jaw assembly can be completed while the jaw assembly is closed, so as to prevent the jaw assembly from rotating and pulling the tissue when clamping the tissue. The matching portion is arranged on the inner side of the angle turning member, so that the matching portion is extended along the radial direction of the angle turning member, and the extending direction of the matching portion is basically consistent with the matching direction of the locking member, so that the locking member and the matching portion are stably locked, and thus the jaw assembly is stably locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the structure of the surgical instrument of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the jaw assembly and the locking member of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the jaw assembly and the steering structure of the present invention;

[0027] Figure 4 is a schematic structural diagram of the angle steering member of the present invention;

[0028] Figure 5 is a top view of the angle turning member of the present invention;

[0029] Figure 6 is a schematic structural diagram of the locking member of the present invention when it is in an unlocked state;

[0030] Figure 7 is a schematic structural diagram of the locking member of the present invention when it is in a locked state;

[0031] Figure 8 It is a schematic structural diagram of the jaw assembly, the sleeve assembly and the lever assembly of the present invention;

[0032] Figures 9 to 13 2 is a schematic structural diagram of a motion changing mechanism of an outer sleeve driving jaw according to a first embodiment of the present invention;

[0033] Fig.14 is a structural schematic diagram of the lever assembly when the outer sleeve of the present invention is in the proximal position;

[0034] Fig.15 is an exploded schematic diagram of the lever assembly of the present invention;

[0035] Fig.16 It is a structural schematic diagram of the lever assembly rotating when the outer sleeve of the present invention is at the distal end position;

[0036] Fig.17 is a cross-sectional view of a lever assembly of the present invention;

[0037] Fig.18 It is a structural schematic diagram of the sleeve assembly, the first driving member and the second driving member of the present invention;

[0038] Fig.19 It is a schematic diagram of the connection structure between the second end rod and the locking member of the lever assembly of the present invention;

[0039] Fig. 20 It is an exploded schematic diagram of the locking member, the ejector seat and the angle turning member of the present invention;

[0040] Fig.21 The present invention Figure 2 The local schematic diagram of the A in the middle;

[0041] Fig. 22 It is a structural schematic diagram of the ejector seat of the present invention;

[0042] Fig.23 is a structural schematic diagram of the connecting rod assembly of the present invention in a first position;

[0043] Fig.24 is a structural schematic diagram of the connecting rod assembly of the present invention being located at a second position;

[0044] Fig.25 is an exploded view of the steering drive assembly of the present invention;

[0045] Fig.26 It is a schematic structural diagram of the driving part, the end piece and the elastic piece of the present invention;

[0046] Fig. 27 It is a structural schematic diagram of the driving part of the present invention;

[0047] Fig.28It is a schematic structural diagram of the driving part and the fixing part of the present invention;

[0048] Fig.29 is a cross-sectional view of a first transmission member of the present invention;

[0049] Fig.30 is a schematic diagram of the structure of the unlocking assembly of the present invention, wherein the connecting rod assembly is located in the second position;

[0050] Fig.31 It is a schematic structural diagram of the unlocking assembly of the present invention, and the connecting rod assembly is located in the first position.

[0051] in:

[0052] 100. Jaw assembly;

[0053] 200, steering structure; 210, angle steering member; 211, wall portion; 2111, groove; 212, matching portion; 213, steering hole; 214, outer peripheral surface; 215, middle arc surface; 216, first side surface; 217, second side surface;

[0054] 300, locking member; 310, pull rod; 320, locking portion; 321, protruding portion; 330, locking head; 340, bending portion;

[0055] 400, sleeve assembly; 410, inner sleeve; 411, ejector seat; 4111, first receiving groove; 4112, second receiving groove; 4113, third receiving groove; 4114, limiting area; 41141, distal wall; 41142, proximal wall; 4115, fixed axis; 412, sliding groove; 420, outer sleeve; 421, first driving part; 422, second driving part; 423, first moving groove; 430, spring; 440, slider;

[0056] 500, motion conversion structure; 511, lever member; 512, rotating part; 513, first connecting part; 5131, first end rod; 514, second connecting part; 5141, second end rod; 5142, waist-shaped groove;

[0057] 600, frame; 610, connecting rod assembly; 611, first connecting rod; 612, second connecting rod;

[0058] 700, steering drive assembly; 710, operating handle; 720, driving part; 721, matching teeth; 722, sliding block; 730, fixing part; 731, locking teeth; 740, gear assembly; 741, left gear part; 742, right gear part; 750, push rod assembly; 751, left push rod; 752, right push rod; 760, first transmission member; 761, end member; 762, elastic member; 7611, slide groove;

[0059] 800, handle; 810, support member;

[0060] 910, release button; 920, unlocking lever. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0062] It should be understood that the terms "proximal" and "distal" used herein are relative to the clinician who manipulates the handle of the stapler. The term "proximal" refers to the part close to the clinician, and the term "distal" refers to the part away from the clinician. That is, the handle is the proximal side, and the jaw assembly is the distal side. For example, the proximal end of a component represents the end relatively close to the handle, and the distal end represents the end relatively close to the jaw assembly. The terms "upper" and "lower" are based on the relative positions of the anvil and the staple magazine seat of the jaw assembly. Specifically, the anvil is at the "upper" and the staple magazine seat is at the "lower". However, the stapler can be used in many directions and positions, so these terms expressing relative positional relationships are not restrictive and absolute.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms such as "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a movably connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements such as abutment. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. It should be noted that when there are qualifiers before "connected" and "connection", they have the meaning defined by the corresponding qualifiers, and only exclude situations that obviously need to be excluded, and do not exclude other possible situations. For example, "detachably connected" refers to a detachable connection, and does not include integration, but movable connection, etc. are not excluded. Example

[0064] The first embodiment of the present invention discloses a surgical instrument, specifically a stapler, such as Figure 1 and Figure 2As shown, the medical instrument includes a jaw assembly 100, a sleeve assembly 400, a steering structure 200 and an operating assembly. The sleeve assembly 400 is connected between the operating assembly and the jaw assembly 100, and the jaw assembly 100 is rotatably connected to the sleeve assembly 400 through the steering structure 200, so that the jaw assembly 100 can rotate relative to the sleeve assembly 400. During surgery, when the jaw assembly 100 is in an open state, the medical staff controls the jaw assembly 100 to rotate a certain angle through the operating assembly. After rotating to a suitable position, the jaw assembly 100 is closed by operating the operating assembly to clamp and squeeze the human tissue to facilitate subsequent cutting.

[0065] like Figures 3 to 5 As shown, the steering structure 200 includes an angle steering member 210, one end of which is rotatably connected to the sleeve assembly 400, and the other end is connected to the jaw assembly 100. In response to the rotation of the angle steering member 210, the jaw assembly 100 rotates relative to the sleeve assembly 400. The angle steering member 210 has an outer peripheral surface, and the outer peripheral surface 214 is arranged on the outer periphery of the angle steering member 210 around the rotation axis of the angle steering member 210, and specifically includes a middle arc surface 215, a first side surface 216 and a second side surface 217, and the first side surface 216 and the second side surface 217 are respectively located on both sides of the middle arc surface 215. The angle steering member 210 also includes a matching portion 212 and a wall portion 211, and the wall portion 211 has a certain thickness. The matching portion 212 is arranged on the inner side of the wall portion 211, and the outer peripheral surface 214 is located on the outer side of the wall portion 211. The wall portion 211 separates the matching portion 212 from the outer peripheral surface 214.

[0066] Before the jaw assembly 100 is closed to clamp the tissue, the jaw assembly 100 can rotate relative to the sleeve assembly 400. After the jaw assembly 100 is closed to clamp the tissue, the jaw assembly 100 needs to be locked to prevent the jaw assembly 100 from shaking and pulling the tissue during compression. Figure 2 , Figures 6 to 8 As shown, the surgical instrument also includes a motion conversion structure 500 and a locking member 300. The sleeve assembly 400 includes an inner sleeve 410 and an outer sleeve 420. The outer sleeve 420 is sleeved outside the inner sleeve 410 and can move relative to the inner sleeve 410. The outer sleeve 420 is connected to the locking member 300 through the motion conversion structure 500. The outer sleeve 420 has a proximal position and a distal position. Accordingly, the locking member 300 has a locked state and an unlocked state.

[0067] In this embodiment, each matching portion 210 is arranged on the proximal side of the rotation axis of the angle steering member 210, and the locking member 300 switches from the unlocked state to the locked state when it moves toward the proximal end. When the outer sleeve 420 is located at the proximal position, the jaw assembly 100 is in the open state, the locking member 300 is in the unlocked state, and in response to the rotation of the angle steering member, the jaw assembly 100 rotates relative to the sleeve assembly 400. At this time, the medical staff can control the rotation of the jaw assembly 100 through the operating assembly; when the outer sleeve 420 moves from the proximal position to the distal position, the jaw assembly 100 switches to the closed state, and the outer sleeve 420 drives the locking member 300 to move toward the proximal end through the motion conversion structure 500, so that the locking member 300 switches from the unlocked state to the locked state, and the locking member 300 locks the angle steering member, so that the angle steering member cannot rotate, thereby preventing the jaw assembly 100 from rotating relative to the sleeve assembly 400. The rotation of the jaw assembly 100 can be locked while the jaw assembly 100 is closed, thereby preventing the jaw assembly 100 from rotating and pulling the tissue when clamping the tissue.

[0068] The outer sleeve 420 is switched from the proximal position to the distal position, so that the jaw assembly 100 is switched from the open state to the closed state in the following manner:

[0069] like Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.13 As shown, the jaw assembly 100 includes a nail magazine seat 110, an anvil seat 120 rotatably connected to the nail magazine seat 110, and a motion conversion mechanism is provided between the outer sleeve 420 and the anvil seat 120 of the jaw assembly 100. The motion conversion mechanism converts the linear motion of the outer sleeve 420 into the pivoting motion of the anvil seat 120, so that the anvil seat 120 pivots relative to the nail magazine seat 110 to close or open the jaw assembly 100. Specifically, when the outer sleeve 420 moves toward the proximal end, the motion conversion mechanism drives the anvil seat 120 to pivot upward to open the jaw assembly 100, and when the outer sleeve 420 moves toward the distal end, the motion conversion mechanism drives the anvil seat 120 to pivot downward to close the jaw assembly 100.

[0070] Specifically, the outer sleeve 420 includes a body 425 and a drive tube 426 connected to each other, and the drive tube 426 drives the anvil 120 to pivot upward or downward to open or close the jaw assembly 100. The body 425 and the drive tube 426 are connected by a hinge.

[0071] The motion conversion mechanism includes a first driving portion 4261 and a second driving portion 4262 disposed on the driving tube 426 , and a first driven portion 121 and a second driven portion 122 disposed on the anvil 120 .

[0072] The first driving part 4261 drives the anvil 120 to open, and the first driving part 4261 is a protrusion provided on the driving tube 426, and the protrusion extends along the lower right side. The second driving part 4262 drives the anvil 120 to close, and the second driving part 4262 is a driving surface at the far end of the driving tube 426.

[0073] Correspondingly, the first driven part 121 can be matched with the first driving part 4261, and the first driven part 121 is a convex part arranged on the anvil seat 120, and the convex part extends upward. The second driven part 122 can be matched with the second driving part 4262, and the second driven part 122 is the abutting surface of the proximal end of the anvil seat 120.

[0074] A guiding mechanism is also arranged between the anvil seat 120 and the nail magazine seat 110, and the guiding mechanism includes a pin 123 arranged on the anvil seat 120, and an oblique waist-shaped groove 111 arranged on the nail magazine seat 110, and the oblique waist-shaped groove 111 extends upwardly in a direction from the proximal end to the distal end.

[0075] See also Figure 13 to Figure 12 When the state of the jaw assembly 100 changes and it is necessary to close the jaw assembly 100, the main body 425 of the outer sleeve 420 pushes the drive tube 426 to move toward the distal end, the second drive portion 4262 on the drive tube 426 abuts against the second follower portion 122 on the dowel seat 120, the pin 123 moves from the proximal lower end to the distal upper end of the oblique waist-shaped groove 111, the dowel seat 120 pivots downward, and the jaw assembly 100 is closed.

[0076] See also Figure 12 to Figure 13 When the state of the jaw assembly 100 needs to be opened, the main body 425 of the outer sleeve 420 pulls the drive tube 426 to move toward the proximal end, the first drive portion 4261 on the drive tube 426 abuts against the first follower portion 121 on the dowel seat 120, the pin 123 moves from the far upper end to the proximal lower end of the oblique waist-shaped groove 111, the dowel seat 120 pivots upward, and the jaw assembly 100 opens.

[0077] The matching portion 212 is disposed on the inner side of the wall portion 211. When the locking member 300 is in the unlocked state, the locking member 300 is unlocked from the matching portion 212. When the locking member 300 moves toward the proximal end to the locked state, the locking member 300 is locked with the matching portion 212. The matching portion 212 is disposed on the inner side of the angle turning member 210 so as to better match with the locking member 300. If the matching portion 212 is disposed on the outer peripheral surface 214, the locking effect is poor when the jaw assembly 100 rotates at a large angle. The specific reasons are as follows:

[0078] Limited by the width of the sleeve assembly 400, the first side surface 216 and the second side surface 217 are generally flat and arranged along the axial direction of the sleeve assembly 400, so that the angle steering member 210 is narrow and long. The matching portion 212 on the middle arc surface 215 extends along the radial direction of the angle steering member 210. When the angle steering member 210 rotates, the matching portion 212 corresponds to the locking member 300, and the matching direction of the locking member 300 is basically consistent with the extension direction of the matching portion 212. The locking member 300 and the matching portion 212 can be matched smoothly. When the locking member 300 moves toward the proximal end and switches to the locked state, it can be locked with the matching portion 212. When the jaw assembly 100 is rotatable at a larger angle, the number of the mating portions 212 arranged on the outer peripheral surface 214 is increased so that when the angle steering member 210 is rotated at a larger angle, there is a mating portion 212 corresponding to the locking member 300, so that the mating portions 212 are arranged on the first side surface 216 and the second side surface 217, and the mating portions 212 located on the first side surface 216 generally extend in a direction perpendicular to the first side surface 216, rather than being arranged along the radial direction of the angle steering member 210. When the angle steering member 210 is rotated until the mating portion 212 located on the first side surface 216 corresponds to the locking member 300, the extension direction of the mating portion 212 is staggered from the mating direction of the locking member 300, and the mating is unstable. The second side surface 217 is generally parallel to the first side surface 216. Similar to the first side surface 216, the mating portion 212 and the locking member 300 thereon cannot stably cooperate, so that when the jaw assembly 100 rotates at a large angle, the locking member 300 cannot stably cooperate with the mating portion 212 and cannot effectively lock the jaw assembly 100.

[0079] In the present invention, the matching portion 212 is disposed on the inner side of the angle turning member 210, so that the matching portion 212 is extended along the radial direction of the angle turning member 210. When the angle turning member 210 rotates at a large angle, the extending direction of the matching portion 212 is substantially consistent with the matching direction of the locking member 300, both being the axial direction of the sleeve assembly 400, so that the locking member 300 and the matching portion 212 are stably locked, and thus the jaw assembly 100 is stably locked.

[0080] Among them, there are multiple matching parts 212 arranged around the rotation axis of the angle steering member 210, and each matching part 212 is extended along the radial direction of the angle steering member 210. When the locking member 300 is in the unlocking position, it corresponds to at least one of the matching parts 212. When the locking member 300 moves to the locking position, it cooperates with the corresponding matching part 212 to lock the angle steering member 210.

[0081] Specifically, one of the matching portion 212 and the locking member 300 is provided with a locking tooth 731, and the other is provided with a matching groove. The locking tooth 731 cooperates with the matching groove to lock the matching portion 212 and the locking member 300, and the locking tooth 731 is separated from the matching groove to unlock the matching portion 212 and the locking member 300. The locking tooth 731 and the matching groove are plugged in and matched, which can effectively limit the rotation of the angle steering member 210. Preferably, the matching portion 212 includes a plurality of locking teeth 731, each of which is arranged to form an inner tooth structure, and each of which points to the rotation axis of the angle steering member 210. The locking member 300 is provided with a matching groove, and the cross-section of the matching groove is generally V-shaped, which matches the locking tooth 731.

[0082] Further, the mating portion 212 includes a first mating portion located at the head end and a second mating portion located at the tail end. When the first mating portion is mated with the locking member 300, the angle between the jaw assembly 100 and the sleeve assembly 400 is greater than or equal to 70°; when the second mating portion is mated with the locking member 300, the angle between the jaw assembly 100 and the sleeve assembly 400 is greater than or equal to 70°. When the first mating portion is mated with the locking member 300, the jaw assembly 100 rotates to the left to the limit angle; when the second mating portion 212 is mated with the mating portion, the jaw assembly 100 rotates to the right to the limit angle. The maximum angle of the surgical instrument jaw assembly 100 to rotate to one side in the present invention is greater than or equal to 70°, which can better clamp the target tissue during surgery.

[0083] The surgical instrument includes a frame 600, a motion conversion structure 500 is disposed on the frame 600, and an outer sleeve 420 is connected to the locking member 300 through the motion conversion structure 500. In one embodiment, Figures 14 to 18 As shown, the motion conversion structure 500 includes a lever member 510, a rotating part 512, a first connecting part 513 and a second connecting part 514. The lever member 511 is connected to the rotating part 512 and is rotatably connected to the frame through the rotating part 512. The first connecting part 513 and the second connecting part 514 are respectively located on both sides of the rotating part 512. The first connecting part 513 is connected to the outer sleeve 420, and the second connecting part 514 is connected to the locking member 300. The outer sleeve 420 moves to drive the first connecting part 513 to move, thereby driving the lever member 511 to rotate. When the lever member 511 rotates, the movement of the second connecting part 514 drives the locking member 300 to move. The movement direction of the first connecting part 513 is opposite to the movement direction of the second connecting part 514. In response to the movement of the outer sleeve 420 along the first direction, the locking member 300 moves along the second direction. The first direction is opposite to the second direction. The first direction and the second direction are both parallel or colinear with the axial direction of the sleeve assembly 400. As shown in FIG. Fig.16As shown, when the outer sleeve 420 moves toward the proximal end, the first connecting portion 513 rotates clockwise and the second connecting portion 514 rotates counterclockwise, driving the locking member 300 to move toward the distal end. When the outer sleeve 420 moves toward the distal end, the first connecting portion 513 rotates counterclockwise and the second connecting portion 514 rotates clockwise, driving the locking member 300 to move toward the proximal end.

[0084] Preferably, the distance between the second connection part 514 and the rotating part 512 is smaller than the distance between the first connection part 513 and the rotating part 512. In the lever structure, the distance between the first connection part 513 and the rotating part 512 is the power arm, and the distance between the second connection part 514 and the rotating part 512 is the resistance arm. In the process that the outer sleeve 420 drives the lever member 511 to rotate and drives the locking member 300 to move, the power arm is longer and the resistance arm is shorter. The lever structure is a labor-saving lever, which makes it easier for the outer sleeve 420 to drive the locking member 300 to move. At the same time, when the locking member 300 is in the locked position, the outer sleeve 420 is locked at the distal position by the operating assembly, and the locking force applied to the outer sleeve 420 provides a greater locking force to the locking member 300 through the lever member 511, so that the locking member 300 is better maintained in the locked position.

[0085] In this embodiment, two lever members 511 are formed, and the rotation shafts 512 of the two lever members 511 are coaxially arranged. The first connection parts 513 of the two lever members 511 are connected by the first end rod 5131, and the second connection parts 514 of the two lever members 511 are connected by the second end rod 5141, so that the two lever members 511 move synchronously. The two lever members 511 are connected by the first end rod 5131 and the second end rod 5141, and the whole is a frame. When the lever members 511 rotate, the two lever members 511 rotate synchronously, which improves the stability of the rotation of the lever members 511. The first end rod 5131 is connected to the outer sleeve 420, so that the first connection parts 513 of the two lever members 511 are connected to the outer sleeve 420; the second end rod 5141 is connected to the locking member 300, so that the second connection parts 514 of the two lever members 511 are connected to the locking member 300. Of course, in other embodiments, the lever member 511 may be provided with only one, the first connection portion 513 of the lever member 511 is provided with a connection structure connected to the outer sleeve 420, which may be a rod body or a hole, and the second connection portion 514 of the lever member 511 is provided with a connection structure connected to the locking member 300, which may be a rod body or a hole, etc., which is not specifically limited in this embodiment.

[0086] The outer sleeve 420 moves along the axis direction of the sleeve assembly 400, and the motion path is a straight line. When the lever member 511 rotates, its first connection part 513 rotates around the rotating part 512, and the motion path is an arc. The outer sleeve 420 that moves in a straight line is connected to the first connection part 513 that moves along the arc. Since the motion path of the outer sleeve 420 is different from the motion path of the first connection part 513 of the lever member 511, the first connection part 513 is prone to get stuck during the movement. In order to solve this problem, in this embodiment, the outer sleeve 420 and the first connection part 513 are movably connected through a guide structure. When the outer sleeve 420 moves along the first direction, the first connection part 513 is driven to rotate around the rotating part 512 of the lever member 511 through the guide structure. The first direction is parallel or colinear with the axis direction of the sleeve assembly 400.

[0087] The direction of the axis of the sleeve assembly 400 is the X direction, and the Y direction is perpendicular to the X direction. The outer sleeve 420 can only move along the X direction, pushing the lever member 511 to rotate, so that the first connection part 513 can rotate. The rotation of the first connection part 513 produces displacement in both the X direction and the Y direction. In the X direction, the first connection part 513 moves with the outer sleeve 420. In the Y direction, the first connection part 513 moves relative to the outer sleeve 420 through the guide structure and is always connected to the outer sleeve 420, so that the first connection part 513 can rotate smoothly while maintaining the connection with the outer sleeve 420, thereby avoiding the occurrence of rotation jamming.

[0088] When the lever member 511 is driven to rotate, the movement path of the second connection part 514 is arc-shaped. The second connection part 514 connects and drives the locking member 300 to move only along the X direction. In order to enable the second connection part 514 to only drive the locking member 300 to move along the X direction, the second connection part 514 is movably connected to the locking member 300 through a guide structure. When the second connection part 514 rotates around the rotating part 512, it is displaced in both the X direction and the Y direction. In the X direction, the locking member 300 moves with the second connection part 514; in the Y direction, the locking member 300 moves relative to the second connection part 514 through the guide structure, so that the second connection part 514 is always connected to the locking member 300, and the second connection part 514 drives the locking member 300 to move through the guide structure.

[0089] The guide structure includes a motion rod and a moving groove 423. One of the outer sleeve 420 and the first connecting part 513 is provided with a motion rod, and the other one has a moving groove 423. The motion rod is located in the first moving groove 423. When the outer sleeve 420 moves in the first direction, the first connecting part 513 is driven to move along the first direction (X direction) through the guide structure, and the motion rod slides along the length direction of the moving groove 423 (i.e., Y direction) to make the first connecting part 513 move relative to the outer sleeve 420, thereby allowing the first connecting part 513 to be displaced in the Y direction.

[0090] In the guide structure where the first connecting portion 513 is connected to the outer sleeve 420, as shown in FIG. Figures 15 to 18 As shown, the moving rod is connected to the first connecting part 513, specifically the first end rod 5131, and the outer sleeve 420 is provided with a first driving part 421 and a second driving part 422. The first driving part 421 and the second driving part 422 are arranged on the lower side of the outer sleeve 420 and extend approximately along the Y direction. A moving groove 423 is formed between the first driving part 421 and the second driving part 422, and the moving groove 423 extends approximately along the Y direction. The first end rod 5131 is located in the moving groove 423 and can move in the moving groove 423 along the length direction of the moving groove 423 (approximately the Y direction).

[0091] like Figures 15 to 19 As shown, in the guide structure where the second connecting portion 514 is connected to the locking member 300, the moving rod is the second end rod 5141, and the second end rod 5141 is connected to the locking member 300. Fig.15 As shown, the proximal end of the locking member 300 is provided with a U-shaped slot, and the locking member 300 is engaged with the second end rod 5141 through the U-shaped slot, so that the second end rod 5141 is engaged in the U-shaped slot, and can drive the locking member 300 to move toward the proximal end or the distal end. The inner sleeve 410 is provided with a sliding slot 412, and the second end rod 5141 is disposed in the sliding slot 412, and the second end rod 5141 can only move along the X direction in the sliding slot 412. The moving groove 423 is formed on the lever member 511, specifically a waist-shaped groove 5142. The two ends of the second end rod 5141 are respectively placed in the waist-shaped grooves 5142 of the two lever members 511, and the waist-shaped grooves 5142 extend along the Y direction. When the lever member 511 rotates, the two ends of the second end rod 5141 are respectively located in the waist-shaped grooves 5142 of the two lever members 511 and slide along the length direction of the waist-shaped grooves 5142 (displacement along the Y direction), so that the second connecting portion 514 can only drive the locking member 300 to move in the X direction. In the embodiment where the transmission structure has only one lever member 510, the lever member 510 is disposed on one side of the sleeve assembly 400, one end of the second end rod 5141 is fixedly connected to the locking member 300, and the other end is located in the moving groove 423.

[0092] In another embodiment, the motion conversion structure 500 includes a gear and two racks (not shown in the figure), the gear is rotatably arranged on the frame 600, the two racks are respectively a first rack and a second rack, the first rack and the second rack are respectively arranged on both sides of the gear and are meshed with the gear, when the gear rotates, the movement directions of the two racks are opposite, wherein the first rack is connected to the outer sleeve 420, and the second rack is connected to the locking member 300, the outer sleeve 420 drives the lever member 511 to move the first rack in a first direction to drive the gear to rotate, and then drive the second rack to move in a second direction, the first direction is opposite to the second direction. The first direction and the second direction are both parallel or colinear with the axis direction of the sleeve assembly 400. When the outer sleeve 420 moves toward the distal end, it drives the first rack to move toward the distal end, so that the gear rotates, thereby driving the second rack and the locking member 300 to move toward the proximal end; when the outer sleeve 420 moves toward the proximal end, it drives the first rack to move toward the proximal end, so that the gear rotates, thereby driving the second rack and the locking member 300 to move toward the distal end.

[0093] Furthermore, if Figure 2 , Figure 20 to Figure 22 As shown, the sleeve assembly 400 is provided with an ejector seat 411, which is fixedly arranged on the inner sleeve 410, and the ejector seat 411 is rotatably connected to the angle steering member 210. In a preferred embodiment, the angle steering member 210 is provided with a steering hole 213, and the ejector seat 411 is provided with a fixed shaft 4115. The angle steering member 210 is fixedly connected to the ejector seat 411 through the cooperation between the steering hole 213 and the fixed shaft 4115. The angle steering member 210 is provided with a groove 2111, and the groove 2111 is located on the inner side of the wall portion. The matching portion 212 is arranged in the groove 2111, and the steering hole 213 is connected to the groove 2111. The locking member 300 includes a pull rod 310 and a locking portion 320. The pull rod 310 is connected to the lever member 511 at the proximal end and the locking portion 320 at the distal end. The locking portion 320 includes a locking head 330 and a body portion 340, and the body portion 340 is connected to the locking head 330. In the unlocked state, the locking head 330 is separated from the matching portion 212. After the jaw assembly 100 turns, the medical staff operates the handle 800 to move the outer sleeve 420 toward the distal end, thereby closing the jaw assembly 100. When the outer sleeve 420 moves toward the distal end, the locking member 300 moves toward the proximal end. The locking member 300 switches from the unlocked state to the locked state. At this time, the locking head 330 moves toward the proximal end in the steering hole 213, moves into the groove 2111 and engages with the corresponding matching portion 212, locking the angle steering member 210, and thereby realizing the rotational locking of the jaw assembly 100.

[0094] The ejector seat 411 is provided with a first receiving groove 4111 and a second receiving groove 4112, the first receiving groove 4111 is connected to the second receiving groove 4112, the pull rod 310 is partially located in the first receiving groove 4111 and can move in the first receiving groove 4111, the main body 340 is located in the second receiving groove 4112 and can move toward the proximal end or the distal end in the second receiving groove 4112, the second receiving groove 4112 has a limiting area 4114, and the main body The locking member 300 has a protruding portion 321 received in the limiting region 4114. When the locking member 300 is in the unlocked state, the protruding portion 321 abuts against the distal wall 41141 of the limiting region 4114. When the locking member 300 is in the locked state, the protruding portion 321 abuts against the proximal wall 41142 of the limiting region 4114. The setting of the limiting region 4114 and the protruding portion 321 limits the locking member 300 to move only between the locked position and the unlocked position. At the same time, the pull rod 310 fits with the inner walls on both sides of the first receiving groove 4111, and the locking portion 320 fits with the inner walls on both sides of the second receiving groove 4112, so as to prevent the locking member 300 from shaking left and right.

[0095] The ejector seat 411 is also provided with a third receiving groove 4113, which is connected to the second receiving groove 4112, and the third receiving groove 4113 passes through the fixed shaft 4115. The third receiving groove 4113 accommodates the locking head 330, and the third receiving groove 4113 corresponds to the groove 2111, so that the locking head 330 can slide out of the third receiving groove 4113 and cooperate with the groove 2111.

[0096] In other embodiments, the mating portion 212 is disposed on the upper surface of the angle steering member 210 and is disposed along the thickness direction of the angle steering member 210. A plurality of mating portions 212 are arranged around the rotation axis of the angle steering member 210 and face the rotation axis of the angle steering member 210. When in the locked position, the locking head 330 is mated with at least one mating portion 212; when in the unlocked position, the locking head 330 is located above the upper surface of the angle steering member 210. The surgical instrument in this embodiment controls the jaw assembly 100 to turn, and controls the outer sleeve 420 to move distally to close the jaw assembly 100. The outer sleeve 420 moves distally to drive the locking member 300 to switch from the unlocked position to the locked position to lock the jaw assembly 100, thereby preventing the jaw assembly 100 from rotating relative to the sleeve assembly 400 after the jaw assembly 100 is closed. The surgical instrument has a handle 800. Medical personnel can control the outer sleeve 420 to move toward the distal end by actuating the handle 800. The control of the outer sleeve 420 to move toward the distal end by actuating the handle 800 is achieved by the following structure:

[0097] like Fig.23 and Fig.24As shown, the surgical instrument includes a link assembly 610 disposed on a frame 600, the link assembly 610 includes a first link 611 and a second link 612, the distal end of the first link 611 is connected to the proximal end of the outer sleeve 420, the distal end of the outer sleeve 420 is connected to the jaw assembly 100, the proximal end of the second link 612 is rotatably connected to the frame 600, and the distal end is rotatably connected to the proximal end of the first link 611. The handle 800 can engage with the link assembly 610 and drive the link assembly 610 to move when actuated. The connecting rod assembly 610 has a first position and a second position. When the connecting rod assembly 610 is in the first position, the first connecting rod 611 and the second connecting rod 612 form an angle with each other, and the outer sleeve 420 is in the proximal position. When the connecting rod assembly 610 is in the second position, the first connecting rod 611 and the second connecting rod 612 are colinear or substantially colinear, so that the connecting rod assembly 610 self-locks in the second position, and the outer sleeve 420 is in the distal position. Under the self-locking effect of the connecting rod assembly 610, the outer sleeve 420 remains in the distal position.

[0098] Collinearity means that the first link 611 and the second link 612 are located on the same straight line, and the angle between them is 180°. Substantially collinearity means that the first link 611 and the second link 612 pass the dead point position, and the angle between the first link 611 and the second link 612 is greater than 0° and less than 5°. When the link assembly 610 is located at the dead point (corresponding to collinearity) or substantially at the dead point (corresponding to substantially collinearity), the pressure angle between the first link 611 and the second link 612 is substantially equal to 90°. When the first link 611 or the second link 612 is subjected to external force, the torque on the other link is zero, so that the link assembly 610 cannot move, and the link assembly 610 is self-locked in the second position. Thus, the jaw assembly 100 is locked in the closed position.

[0099] The handle 800 is provided with a supporting portion 810, which is located at the lower side of the connecting rod assembly 610. When the connecting rod assembly 610 switches from the first position to the second position, the handle 800 supports the first connecting rod 611 or the second connecting rod 612 through the supporting portion 810 to be operably engaged with the connecting rod assembly 610. When the connecting rod assembly 610 is in the second position and locked in the second position, the supporting portion 810 is separated from the connecting rod assembly 610 when the handle 800 is reset and rebounded. When the handle 800 is subsequently actuated, the handle 800 switches from the initial position to the pressing position, and the supporting portion 810 moves with the movement of the handle 800. The supporting portion 100 contacts the connecting rod assembly 610 in the second position only when the handle 800 reaches the pressing position (the end point of the movement trajectory of the supporting portion 810), that is, the supporting portion 810 does not contact the connecting rod assembly 610 during the movement, so the handle 800 cannot drive the connecting rod assembly 610 during subsequent actuation. Specifically, the supporting portion 810 is a rod body, and the handle 800 is operably engaged with the connecting rod assembly 610 by abutting the second connecting rod 213 through the supporting portion 810. During the rotation of the second connecting rod 213, the supporting portion 810 can always abut the second connecting rod 213.

[0100] During the process of switching the connecting rod assembly 610 from the first position to the second position, the hinge point gradually moves to the upper side (the side away from the gripping part of the handle 800). Since the proximal end of the second connecting rod 612 is connected to the frame 600, the hinge point located at the distal end of the second connecting rod 612 moves toward the distal end. At the same time, the rotation of the first connecting rod 611 causes the distal end of the first connecting rod 611 to move toward the distal end. As can be seen from the above, the distal end of the first connecting rod 611 is connected to the proximal end of the outer sleeve 420, and the distal end of the outer sleeve 420 is connected to the jaw assembly 100. Therefore, the connecting rod assembly 610 can drive the outer sleeve 420 to move toward the distal end to close the jaw assembly 100.

[0101] After the jaw assembly 100 is closed, the link assembly 610 self-locks in the second position, locking the outer sleeve 420 in the distal position, thereby keeping the locking member 300 in the locked position, thereby maintaining the locking of the jaw assembly 100 .

[0102] Further, such as Figure 3 , Figure 25 to Figure 29As shown, the surgical instrument further includes: a steering drive assembly 700, which is arranged on the frame 600 and is used to control the rotation of the jaw assembly 100. The steering drive assembly 700 includes an operating handle 710, a driving part 720, a first transmission member 760, a fixing part 730, a second transmission member and a push rod assembly 750. The operating handle 710 is used to be operated and rotated by medical staff, the operating handle 710 is connected to the driving part 720, the operating handle 710 and the driving part 720 are integrally arranged and can rotate synchronously, the driving part 720 is connected to the first transmission member 760, drives the first transmission member 760 to rotate, the first transmission member 760 is connected to the push rod assembly 750 through the second transmission member, the first transmission member 760 drives the push rod assembly 750 to move through the second transmission member, and then drives the angle steering member 210 to rotate. The fixing part 730 is arranged on the frame 600, the first transmission member 760 is rotatably arranged in the fixing part 730, a sliding space is provided in the first transmission member 760, and the driving part 720 is located in the sliding space. The push rod assembly 750 includes a left push rod 751 and a right push rod 752, and the second transmission member specifically includes a gear assembly 740, and the gear assembly 740 includes a left gear part 741 and a right gear part 742, and the left gear part 741 and the right gear part 742 are connected to the frame 600 and are respectively arranged on both sides of the first transmission member 760. The left gear part 741 and the right gear part 742 each include two coaxially arranged gears, the left push rod 751 meshes with the lower gear of the left gear part 741, and the right push rod 752 meshes with the lower gear of the right gear part 742, and the first transmission member 760 has a tooth structure on the lower side, which meshes with the upper gear of the left gear part 741 and the upper gear of the right gear part 742. When the medical staff rotates the operating handle 710, the driving part 720 is driven to rotate. The driving part 720 drives the left gear part 741 and the right gear part 742 to rotate through the first transmission member 760. The rotation directions of the left gear part 741 and the right gear part 742 are opposite, so that the movement directions of the left push rod 751 and the right push rod 752 are opposite. The left push rod 751 and the right push rod 752 both extend along the length direction of the sleeve assembly 400. The distal ends of the left push rod 751 and the right push rod 752 are close to the angle steering member 210. When the driving part 720 rotates to drive the left push rod 751 and the right push rod 752 to move, the angle steering member 210 is pushed to rotate, thereby rotating the jaw assembly 100. For example, when the medical staff rotates the operating handle 710 in a counterclockwise direction, the left push rod 751 moves toward the proximal end, the right push rod 752 moves toward the distal end, and the right push rod 752 pushes the angle steering member 210 to rotate to the left. When the medical staff rotates the operating handle 710 in a clockwise direction, the left push rod 751 moves toward the distal end, the right push rod 752 moves toward the proximal end, and the left push rod 751 pushes the angle steering member 210 to rotate rightward. Figure 2As shown, the angle steering member 210 includes a left-side supporting portion 218 and a right-side supporting portion 219, the left push rod 751 is supported on the left-side supporting portion 218, and the right push rod 752 is supported on the right-side supporting portion 219. When the operating handle 710 rotates to drive the left push rod 751 and the right push rod 752 to move, such as rotating the operating handle 710 clockwise, the left push rod 751 moves toward the distal end, and the right push rod 752 moves toward the proximal end. The left push rod 751 pushes the left-side supporting portion 218 of the angle steering member 210 to move toward the distal end, so that the angle steering member 210 rotates to the right, and the right-side supporting portion 219 is driven to move toward the proximal end, always supporting the right push rod 752. Rotate the operating handle 710 counterclockwise to make the left push rod 751 move toward the proximal end, and the right push rod 752 moves toward the distal end in the same way. The angle steering member 210 rotates to the left so that the push rod assembly 750 can drive the angle steering member 210 to rotate, thereby driving the jaw assembly 100 to rotate.

[0103] Further, the steering drive assembly 700 can lock the push rod assembly 750, the operating handle 710 includes a locking portion 720, and the fixing portion 730 includes a locking groove 731. When the operating handle 710 is in the unlocked position, the locking portion 720 is separated from the locking groove 731, and when the operating handle 710 is in the locked position, the locking portion 720 is plugged into the locking groove 731. The locking groove 731 has a guide wall 7311. When the operating handle 710 is switched from the unlocked position to the locked position, the locking portion 720 moves toward the locking groove 731 and plugs into the locking groove 731 under the guidance of the guide wall 7311. The setting of the guide wall 7311 allows the locking portion 720 to be plugged into the locking groove 731 when the locking portion 720 is not aligned with the locking groove 731, so that the operating handle 710 can be smoothly returned to its original position.

[0104] The first transmission member 760 includes a transmission member body and an end member 761. The end member 761 is located in the sliding space and is fixedly connected to the transmission member body. Fig.26 and Fig.29As shown, the end piece 761 is fixed to the transmission member body by screws 765. Specifically, the end piece 761 is located at the far end of the sliding space, and both sides of the width direction of the end piece 761 are provided with slide grooves 7612, and the length direction of the slide grooves 7612 is the same as the length direction of the sliding space. The driving part 720 includes two sliders 722, and the two sliders 722 are respectively inserted into the two slide grooves 7612 on both sides of the end piece 761, so that the driving member 720 is slidably connected with the end piece 761. The operating handle 710 is slidably connected with the first transmission member 760. When the operating handle 710 rotates to the left, the right part of the slider 722 abuts against the bottom of the right slide groove 7612, driving the first transmission member 760 to rotate to the left, and the same applies to rotating to the right. The end piece 761 is provided with a receiving groove 7611, which is a circular groove. The elastic piece 762 is connected to the end piece 761 and is partially received in the receiving groove 7611. The receiving groove 7611 limits the axial position of the elastic piece 762 to prevent the elastic piece 762 from being deflected or bent, and always provides elastic force along the length direction of the sliding space.

[0105] When the steering drive assembly 700 is not operated, the elastic member 762 is in an initial state so that the drive part 720 is in a locked position, the mating tooth 721 is meshed with the locking tooth 731, the drive part 720 is locked and cannot rotate, and at the same time, since the drive part 720 is meshed with the gear assembly 740, and the gear assembly 740 is meshed with the push rod assembly 750, the drive part 720 is locked, so that both the gear assembly 740 and the push rod assembly 750 are locked, thereby locking the jaw assembly 100 to prevent it from rotating.

[0106] Manually move the operating handle 710 to make the driving part 720 slide relative to the fixed part 730, so that the driving part 720 switches from the locked position to the unlocked position. At this time, the elastic member 762 is in a compressed state, the matching teeth 721 are separated from the locking teeth 731, and the driving part 720 is unlocked. The medical staff can drive the driving part 720 to rotate by turning the operating handle 710, thereby driving the jaw assembly 100 to rotate. After the jaw assembly 100 rotates to a suitable position, release the operating handle 710, the elastic member 762 is released and rebounds to the initial state, pushing the driving part 720 to slide, and the matching teeth 721 and the locking teeth 731 are meshed again, so that the driving part 720 is locked to the fixed part 730 again, thereby locking the jaw assembly 100. That is, after the control of the turning of the jaw assembly 100 is completed, the jaw assembly 100 can be locked by releasing the operating handle 710.

[0107] In a preferred embodiment, the locking tooth 731 is arranged at the proximal end of the fixing portion 730, and the mating tooth 721 is arranged at the proximal end of the driving portion 720. The medical staff can push the operating handle 710 forward to make the driving portion 720 move distally to switch from the locked position to the unlocked position. In the unlocked position, the operating handle 7100 is rotated to control the direction of the jaw assembly 100.

[0108] When performing surgery, the medical staff extends the jaw assembly 100 and part of the sleeve assembly 400 of the surgical instrument into the human body, and the jaw assembly 100 is in the straight hitting position, and the length direction of the jaw assembly 100 is colinear with the axis of the sleeve assembly 400, so that the jaw assembly 100 can be easily inserted into the human body; the steering drive assembly 700 is unlocked by pushing the operating handle 710 forward, and the operating handle 710 is rotated to turn the jaw assembly 100. After the jaw assembly 100 is rotated to a suitable angle, the medical staff releases the operating handle 710, and the operating handle 710 is retracted, and the driving part 720 moves to the locking position to preliminarily lock the jaw assembly 100. Then the medical staff actuates the handle 800 to close the jaw assembly 100, clamp and squeeze the patient's tissue, and at the same time, the locking member 300 moves to the locking position to further lock the jaw assembly 100. After squeezing for a certain period of time, the medical staff controls the cutting knife assembly to advance the knife to fire. During the firing process, the cutting knife assembly moves distally to cut the patient's tissue; during the firing process, the jaw assembly 100 is locked and will not rotate, ensuring stable cutting. After the firing is completed, the cutting knife assembly retracts toward the proximal end. After the retraction is completed, the medical staff opens the jaw assembly 100, and the outer sleeve 420 moves from the distal position to the proximal position. This process causes the locking member 300 to move to the unlocked state, and then the steering drive assembly 700 controls the jaw assembly 100 to rotate back to the straight hitting position, and finally the jaw assembly 100 is removed from the human body.

[0109] The surgical instrument also includes a motor assembly and a main control module. The main control module is electrically connected to the motor assembly, and the motor assembly is connected to the cutting knife assembly. The main control module controls the operation of the motor assembly according to the position of the handle 800 and the position of the cutting knife assembly to realize the advancement and retraction of the cutting knife assembly. The specific implementation of advancement and retraction can be found in the applicant's prior application 202310399540.0, which will not be repeated in this application.

[0110] The surgical instrument also includes an unlocking component, such as Fig.30 and Fig.31As shown, the unlocking assembly includes a release button 910 disposed outside the shell of the operating assembly 300, and an unlocking rod 920 located in the shell of the operating assembly and abutting against the connecting rod assembly 610 located in the second position. The unlocking rod 920 is linked with the release button 910, and the release button 910 has a driving rod 911. When the medical staff operates the release button 910, specifically when pushing the release button 910, the release button 910 and the driving rod 911 rotate synchronously, and the rotating driving rod 911 acts on the release rod 920 to rotate the unlocking rod 920, and the unlocking rod 920 abuts against one end of the connecting rod assembly 610 and moves downward to push the connecting rod assembly 610, so that the connecting rod assembly 610 returns to the first position, and the jaw assembly 200 opens to release the human tissue. When the release button 910 is not operated, the unlocking lever 920 is located above the connecting rod assembly 610, and the connecting rod assembly 610 is self-locked in the second position; when the medical staff operates the release button 910, the unlocking lever 920 is rotated, and one end of the unlocking lever 920 moves downward to push the connecting rod assembly 610, so that the connecting rod assembly 610 is no longer in the second position, so as to release the self-locking state of the connecting rod assembly 610. The outer sleeve 420 is sleeved with a spring 430, one end of the spring 430 is connected to the frame 210, and the other end is connected to the push block 440, and the push block 440 is connected to the first connecting rod 611. When the connecting rod assembly 610 is in the second position, the spring 430 is in a compressed state, and the outer sleeve 420 is in a distal position; when the connecting rod assembly 610 is in the first position, the spring 430 is in a released state. When the medical staff operates the release button 910 so that the connecting rod assembly 610 is no longer in the second position, the spring 430 is released, pushing the push block 440 to move proximally, and the connecting rod assembly 610 moves to the first position, so that the jaw assembly 200 is opened, and the outer sleeve 420 moves to the proximal position, thereby driving the locking member 300 to move to the unlocked state. After the knife is retracted, the medical staff operates the release button 910 to open the jaw assembly 100, and then operates the operating handle 710 to rotate the jaw assembly 100 to the straight hitting position, and finally removes the jaw assembly 100 from the human body.

[0111] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0112] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A surgical instrument, characterized in that: include: A jaw assembly, an angle steering member, a sleeve assembly, a motion conversion structure and a locking member, wherein the jaw assembly is rotatably connected to the sleeve assembly through the angle steering member; The rotatable angle steering member comprises a wall portion and a matching portion, wherein the matching portion is arranged on the inner side of the wall portion; the sleeve assembly comprises an outer sleeve, wherein the outer sleeve is connected to the jaw assembly, and the outer sleeve is connected to the locking member through the motion conversion structure; the locking member has a locked state and an unlocked state; in the locked state, the locking member is locked with the matching portion to prevent the jaw assembly from rotating relative to the sleeve assembly, and the matching direction of the locking member and the extending direction of the matching portion locked by the locking member and arranged on the inner side of the wall portion are both the axial direction of the sleeve assembly, and in the unlocked state, the locking member is unlocked with the matching portion, and the jaw assembly rotates relative to the sleeve assembly in response to being operated; When the outer sleeve is located at the proximal position, the jaw assembly is in the open state, and the locking element is in the unlocked state; when the outer sleeve moves from the proximal position to the distal position, the outer sleeve drives the jaw assembly to switch from the open state to the closed state, and the outer sleeve drives the locking element to move proximally through the motion conversion structure to switch the locking element from the unlocked state to the locked state; The rotation axis of the angle steering member is located on the inner side of the wall portion, and the matching portion is arranged on the proximal side of the rotation axis.

2. The surgical instrument according to claim 1, characterized in that One of the matching part and the locking piece is provided with a locking tooth, and the other one is provided with a matching groove, the locking tooth matches with the matching groove to lock the matching part and the locking piece; the locking tooth is separated from the matching groove to unlock the matching part and the locking piece.

3. The surgical instrument according to claim 1, characterized in that The rotation axis of the angle steering member is located on the inner side of the wall portion; there are multiple matching parts, and the multiple matching parts are arranged around the rotation axis. When the locking member is in a locked state, the locking member matches with at least one of the matching parts.

4. The surgical instrument according to claim 3, characterized in that The mating portion includes a first mating portion located at the head end and a second mating portion located at the tail end. When the first mating portion is mated with the locking piece, the angle between the jaw assembly and the sleeve assembly is greater than or equal to 70°; when the second mating portion is mated with the locking piece, the angle between the jaw assembly and the sleeve assembly is greater than or equal to 70°.

5. The surgical instrument according to claim 1, characterized in that The surgical instrument further comprises a frame; the motion conversion structure comprises a lever member, a rotating part, a first connecting part and a second connecting part, the lever member is connected to the rotating part and is rotatably connected to the frame through the rotating part, the first connecting part and the second connecting part are both connected to the lever member and are respectively located on both sides of the rotating part; The outer sleeve is connected to the first connecting part, and the locking member is connected to the second connecting part; when the outer sleeve moves along the first direction to drive the first connecting part to move, the lever member rotates around the rotating part, so that the second connecting part drives the locking member to move along the second direction, and the first direction is opposite to the second direction.

6. The surgical instrument according to claim 5, characterized in that A distance between the second connecting portion and the rotating portion is smaller than a distance between the first connecting portion and the rotating portion.

7. The surgical instrument according to claim 5, characterized in that The motion conversion structure includes two lever members, the rotating parts of the two lever members are coaxially arranged, the first connecting parts of the two lever members are connected by a first end rod, and the second connecting parts of the two lever members are connected by a second end rod, so that the two lever members move synchronously.

8. The surgical instrument according to claim 5, characterized in that The first connecting portion is movably connected to the outer sleeve via a guide structure. When the outer sleeve moves along the first direction, the first connecting portion is driven to rotate around the rotating portion via the guide structure.

9. The surgical instrument according to claim 5, characterized in that The second connecting portion is movably connected to the locking member via a guide structure. When the second connecting portion rotates around the rotating portion, the locking member is driven to move along the first direction via the guide structure.

10. The surgical instrument according to claim 8 or 9, characterized in that: The guide structure includes a moving rod and a moving groove. The moving rod is movably disposed in the moving groove. The length direction of the moving groove is perpendicular or substantially perpendicular to the first direction.

11. The surgical instrument according to claim 5, characterized in that The first direction and the second direction are both axial directions of the sleeve assembly.

12. The surgical instrument according to claim 1, characterized in that The motion conversion structure includes a gear, a first rack and a second rack. The first rack and the second rack are located on both sides of the gear and are meshed with the gear. The first rack is connected to the outer sleeve, and the second rack is connected to the locking member. When the outer sleeve drives the first rack to move in a first direction, the gear rotates to drive the second rack and the locking member to move in a second direction. The first direction is opposite to the second direction.

13. The surgical instrument according to claim 1, characterized in that The jaw assembly includes a nail magazine seat and a nail anvil seat rotatably connected to the nail magazine seat. The surgical instrument also includes a motion conversion mechanism. The outer sleeve is connected to the nail anvil seat through the motion conversion mechanism. The motion conversion mechanism includes a first driving part and a second driving part provided on the outer sleeve, and a first driven part and a second driven part provided on the nail anvil seat. When the outer sleeve is located at the proximal position, the first driving part is matched with the first driven part to make the jaw assembly in an open state; when the outer sleeve moves from the proximal position to the distal position, the first driving part is separated from the first driven part, and the second driving part is matched with the second driven part to make the nail anvil seat pivot, thereby making the jaw assembly in a closed state.

14. The surgical instrument according to claim 1, characterized in that The surgical instrument further comprises a steering drive assembly, which drives the angle steering member to rotate when operated, thereby driving the jaw assembly to rotate.

15. The surgical instrument according to claim 14, characterized in that The steering drive assembly includes an operating handle, a gear assembly and a push rod, the operating handle is connected to the gear assembly, the proximal end of the push rod is provided with connecting teeth, the connecting teeth are meshed with the gear assembly, and the distal end of the push rod is connected to the angle steering member; in response to the rotation of the operating handle, the gear assembly drives the push rod to move through the connecting teeth, thereby driving the angle steering member to rotate.

16. The surgical instrument according to claim 15, characterized in that The steering drive assembly also includes a driving part, an elastic locking piece and a fixing part, the operating handle drives the gear assembly through the driving part, the fixing part has a locking tooth, the driving part has a matching tooth, and the driving part is connected to the elastic locking piece; when the driving part is located in a locking position, the elastic locking piece is in an initial state, and the matching tooth is engaged with the locking tooth to prevent the driving part from rotating; when the driving part is located in an unlocking position, the elastic locking piece is in a compressed state, and the matching tooth is separated from the locking tooth, so that in response to the rotation of the driving part, the gear assembly drives the push rod to move.

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