Surgical instrument

Abstract

A surgical instrument, comprising a jaw assembly (100), a sleeve assembly (400), an angle steering member (200), and a steering driving structure (300). One end of the angle steering member (200) is connected to the jaw assembly (100), and the other end is rotatably connected to the sleeve assembly (400). The angle steering member (200) comprises a body (210) and a protruding portion (220) arranged on the body (210). The protruding portion (220) comprises a first end away from the jaw assembly (100). The distance between the first end and the jaw assembly (100) is greater than the distance between a rotation axis (K) of the body (210) and the jaw assembly (100). The steering driving structure (300) comprises a push rod (310). When the jaw assembly (100) is in a straight state, the push rod (310) abuts against the first end of the protruding portion (220), and in response to the push rod (310) pushing the protruding portion, the angle steering member (200) rotates around the rotation axis (K), thereby driving the jaw assembly (100) to rotate relative to the sleeve assembly (400). In the process that the jaw assembly (100) rotates to an extreme position, an included angle between a driving force (O) and a tangential force (Q) is first decreased and then increased, and is always smaller, so that the tangential force (Q) is always at a larger level, thereby making the rotation smooth and increasing the rotation angle of the jaw assembly (100) relative to the sleeve assembly (400).

Description

surgical instruments

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] For all purposes, this patent application claims priority to Chinese Patent Application No. 202311454215.6 filed on November 2, 2023, and the contents of the above-mentioned Chinese patent application disclosure are hereby incorporated by reference in their entirety as part of the embodiments of the present disclosure. Technical Field

[0003] The present disclosure relates to the technical field of medical instruments, and in particular to a surgical instrument. Background Art

[0004] A surgical stapler is a commonly used medical device that replaces manual suturing. Its primary working principle is to separate tissue using a cutting blade and staple it together using titanium staples, similar to a stapler. Staplers are categorized into various types based on their suitability for different body parts. A surgical stapler operates by inserting a cannula precisely positioned at the surgical site into the patient's body, creating a longitudinal incision in the tissue and applying staples on opposite sides of the incision, thereby separating and stapled the tissue.

[0005] Summary of the Invention

[0006] The embodiments of the present disclosure are intended to provide a surgical instrument in which the jaw assembly has a larger rotation angle relative to the sleeve assembly, which can meet the needs of more surgeries.

[0007] An embodiment of the present disclosure provides a surgical instrument: comprising a jaw assembly, a sleeve assembly, an angle steering member and a steering drive structure, wherein one end of the angle steering member is connected to the jaw assembly and the other end is rotatably connected to the sleeve assembly; the angle steering member comprises a main body and a protrusion provided on the main body, the protrusion comprising a first end away from the jaw assembly, and when the jaw assembly is in a straight-hitting state, the first end is located on the lower side of a first straight line, and the first straight line passes through the rotation axis of the main body and is perpendicular to the axis of the sleeve assembly; the steering drive structure comprises a push rod that can move distally and proximally in a direction parallel to the axis of the sleeve assembly, and when the jaw assembly is in a straight-hitting state, the push rod abuts against the first end of the protrusion, and in response to the distal movement of the push rod, the push rod pushes the protrusion to make the angle steering member rotate around the rotation axis to drive the jaw assembly to rotate relative to the sleeve assembly.

[0008] For example, the raised portion includes a first surface and a rest surface, the first surface is formed at the first end, the rest surface is arranged on the side of the raised portion close to the rotation axis of the main body, and is connected to the first surface, when the jaw assembly is in the straight hitting state, the push rod rests on the first surface; when the jaw assembly is in the maximum rotation state, the push rod rests on the rest surface; the line connecting the point of action of the push rod and the raised portion and the rotation axis on the horizontal plane is the driving radius, when the jaw assembly is in the straight hitting state, the driving radius and the first straight line form a first angle with each other; when the jaw assembly is in the maximum rotation state, the driving radius and the first straight line form a second angle with each other; when the jaw assembly switches from the straight hitting state to the maximum rotation state, the rotation angle of the jaw assembly relative to the sleeve assembly is equal to the sum of the first angle and the second angle.

[0009] For example, the first angle is less than or equal to 40°, and the sum of the first angle and the second angle is greater than or equal to 60° and less than or equal to 70°.

[0010] For example, when the jaw assembly is in the maximum rotation state, the distal end surface of the push rod is in contact with the abutment surface, thereby maintaining the jaw assembly in the maximum rotation state.

[0011] For example, the surgical instrument further includes a locking member, wherein the body is provided with a groove, and the locking member cooperates with the groove to lock the angle deflection member; the angle deflection member further includes a reinforcing portion provided on the body, wherein in the thickness direction of the body, the reinforcing portion at least partially opposes the groove. For example, the reinforcing portion is located on a side of the protrusion close to the jaw assembly and is connected to the protrusion.

[0012] For example, the surgical instrument also includes an angle connection assembly, which is connected between the jaw assembly and the sleeve assembly. When the jaw assembly rotates relative to the sleeve assembly from the straight hitting state, the angle connection assembly rotates with the jaw assembly. The reinforcement portion is provided with an avoidance slope on the side facing the rotation axis of the main body, and the reinforcement portion avoids the rotating angle connection assembly through the avoidance slope.

[0013] For example, the angle steering member includes two protrusions, and the two protrusions are respectively arranged on one side and the other side of the rotation axis along the transverse direction. The steering drive structure includes two push rods. When the jaw assembly is in the straight hitting state, the two push rods respectively resist the first ends of the two protrusions; one push rod moves distally to push the protrusion to rotate the body, and the other push rod moves proximally.

[0014] For example, the steering drive structure further includes a drive assembly, and the push rod is connected to the drive assembly; in response to the drive of the drive assembly, the push rod moves distally to push the protrusion. For example, the drive assembly includes an operating handle, a transmission member, and a gear member, and the operating handle is connected to the gear member through the transmission member; the angle steering member includes two protrusions, and the two protrusions are respectively arranged on one side and the other side of the rotation axis along the transverse direction; the steering drive structure includes two push rods, and the two push rods are provided with matching teeth. The two push rods are respectively located on both sides of the gear member and are engaged with the gear member through the matching teeth; when the jaw assembly is in a straight hitting state, the two push rods respectively abut the first ends of the two protrusions; in response to the operating handle being operated, the gear member rotates, driving the two push rods to move, and the movement directions of the two push rods are opposite.

[0015] For example, the operating handle includes a locking portion, and the steering drive structure also includes a locking assembly. When the operating handle is in a locked position, the locking portion cooperates with the locking assembly; when the operating handle is in an unlocked position, the locking portion is separated from the locking assembly; in response to the operating handle being operated, the operating handle switches from the locked position to the unlocked position.

[0016] For example, the operating handle is slidably connected to the transmission member, and the steering drive structure also includes an elastic member, one end of the elastic member is connected to the transmission member, and the other end is connected to the operating handle. The elastic member is arranged along the sliding direction of the operating handle. When the operating handle switches from the locked position to the unlocked position, the operating handle slides to separate from the locking assembly, and the elastic member is compressed; when the operating handle switches from the unlocked position to the locked position, the elastic member is released, driving the operating handle to slide to cooperate with the locking assembly.

[0017] For example, the surgical instrument also includes a limit member provided on the angle steering member, the limit member is located on the side of the protrusion close to the rotation axis of the main body and is separated from the protrusion; the push rod has a first side away from the axis of the sleeve assembly and a second side close to the axis of the sleeve assembly. In response to the rotation of the angle steering member relative to the sleeve assembly, the first side of the push rod abuts against the protrusion, and the limit member is located on the second side of the push rod and is stopped by the push rod.

[0018] For example, the push rod is provided with a mating groove, and when the jaw assembly is in a straight-hitting state, the limit member is separated from the mating groove; the limit member includes a first part and a second part, and in response to the rotation of the angle steering member relative to the sleeve assembly, the limit member rotates with the angle steering member, the first part enters the mating groove, and the second part is located on the second side of the push rod and is limited and stopped by the push rod.

[0019] For example, the limiting member also includes a main body portion of the angle turning member, the first part and the second part are both connected to the main body portion and protrude outward from the main body portion, and the protruding direction of the first part and the protruding direction of the second part form a certain angle with each other.

[0020] The beneficial effect of the present disclosure is that when the jaw assembly is in a straight-hitting state, the abutment point between the push rod and the raised portion is located below the first straight line. During the process of the jaw assembly rotating to the extreme position, the angle between the driving force and the tangential force first decreases and then increases, and is always less than 40°. The tangential force is always at a relatively large level, and the rotation can be carried out smoothly, thereby improving the rotation angle of the jaw assembly relative to the sleeve assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure.

[0022] FIG1 is a schematic structural diagram of a surgical instrument provided in an embodiment of the present disclosure;

[0023] FIG2 is a schematic structural diagram of a jaw assembly in a straight-hitting state provided by an embodiment of the present disclosure;

[0024] FIG3 is a schematic structural diagram of an angle connection assembly provided by an embodiment of the present disclosure;

[0025] FIG4 is a schematic structural diagram of a jaw assembly provided by an embodiment of the present disclosure in a maximum rotation state;

[0026] FIG5 is a schematic structural diagram of the angle steering member and the angle connection assembly when the jaw assembly provided by an embodiment of the present disclosure is in a maximum rotation state;

[0027] FIG6 is an exploded view of a jaw assembly and a cannula assembly according to an embodiment of the present disclosure;

[0028] 7 to 10 are schematic structural diagrams of the jaw assembly according to an embodiment of the present disclosure, which is provided when the jaw assembly rotates from a straight-hitting state to a maximum rotation state;

[0029] 11 and 12 are schematic structural diagrams of an angle steering member and a push rod in conventional technology;

[0030] FIG13 is a schematic structural diagram of an angle steering member and a locking member provided in an embodiment of the present disclosure;

[0031] FIG14 is a schematic structural diagram of an angle steering member provided in an embodiment of the present disclosure;

[0032] FIG15 is a cross-sectional view of an angle steering member provided in accordance with an embodiment of the present disclosure;

[0033] FIG16 is a schematic structural diagram of an angle connection assembly and an angle steering member provided in an embodiment of the present disclosure;

[0034] FIG17 is a schematic diagram of a steering drive structure provided by an embodiment of the present disclosure;

[0035] FIG18 is an exploded view of a steering drive structure provided by an embodiment of the present disclosure;

[0036] FIG19 is a schematic structural diagram of a driving portion and an end piece provided in an embodiment of the present disclosure;

[0037] FIG20 is a schematic structural diagram of a position limiting member and a push rod when the jaw assembly provided by an embodiment of the present disclosure is in a straight-hitting state;

[0038] 21 to 23 are schematic structural diagrams of a limit member and a push rod when the jaw assembly rotates relative to the sleeve assembly according to an embodiment of the present disclosure.

[0039] Reference numerals:

[0040] 100, jaw assembly;

[0041] 200, angle turning member; 210, body; 220, raised portion; 221, first end; 222, first surface; 223, abutting surface; 230, connecting hole; 240, outer peripheral surface; 250, mating portion; 251, groove; 260, wall portion; 270, reinforcement portion; 280, avoidance slope; 290, stopper; 291, block body; 292, first portion; 293, second portion; O, driving force; Q, tangential force; P, driving radius; U, first straight line; K, rotation axis;

[0042] 300, steering drive structure; 310, push rod; 311, left push rod; 312, right push rod; 313, mating groove; 314, arc-shaped protrusion; 320, drive assembly; 321, operating handle; 3211, operating portion; 3212, drive portion; 3213, slider; 322, transmission member; 3221, end member; 3222, slide groove; 3223, sliding space; 3224, tooth structure; 3225, elastic member; 323, gear member; 3231, left gear member; 3232, right gear member; 330, locking assembly; 331, locking groove;

[0043] 400, sleeve assembly; 410, outer sleeve; 420, inner sleeve; 421, rotating shaft;

[0044] 500, locking piece;

[0045] 600, cutting knife assembly; 610, knife bar;

[0046] 700, angle connection assembly; 710, first angle connection member; 711, first receiving slot; 720, second angle connection member; 721, second receiving slot;

[0047] 800, rack. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure 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 disclosure and are not intended to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0049] 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 refers to the end relatively close to the handle, and the distal end refers to 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.

[0050] In the present disclosure, unless otherwise clearly stipulated 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, or it can be internal communication between two elements or an interactive relationship between two elements such as abutment. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure 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 movably connected, etc. are not excluded.

[0051] The surgical instrument includes a jaw assembly, a cannula assembly, an angled steering member, and a steering drive mechanism. The jaw assembly is rotatably connected to the cannula assembly via the angled steering member. When operated, the steering drive mechanism drives the jaw assembly to rotate relative to the cannula assembly, thereby achieving jaw steering. During surgery, medical personnel can operate the steering drive mechanism to rotate the jaw assembly to a suitable angle to clamp human tissue. In conventional existing techniques, the maximum rotation angle of the jaw assembly relative to the cannula assembly is approximately 40°, which in many cases cannot meet surgical requirements. There is an urgent need for a stapler that allows the jaw assembly to rotate at a greater angle relative to the cannula assembly.

[0052] One embodiment of the present disclosure provides a surgical instrument, which can be a stapler. As shown in Figures 1 to 5, the surgical instrument includes a jaw assembly 100, a sleeve assembly 400, an angle steering member 200, a steering drive structure 300, and a cutting knife assembly 600. The jaw assembly 100 is rotatably connected to the sleeve assembly 400 through the angle steering member 200. When the surgical instrument is working, the jaw assembly 100 and part of the sleeve assembly 400 are extended into the human body. The medical staff manipulates the steering drive structure 300 to control the rotation of the jaw assembly 100 until the jaw assembly Part 100 rotates to a suitable position. During this process, the angle steering part 200 drives the jaw assembly 100 to rotate. While the jaw assembly 100 rotates, it drives the knife rod 610 of the cutting knife assembly 600 to bend. Then the medical staff controls the jaw assembly 100 to close to clamp the human tissue, and then controls the cutting knife assembly 600 to fire, cutting and suturing the human tissue. After cutting and suturing are completed, the jaw assembly 100 is opened to release the tissue, and the jaw assembly 100 is rotated to the straight hitting state to remove the surgical instrument from the human body to complete the surgical operation.

[0053] As shown in Figures 1 and 6, the angle steering member 200 is connected to the jaw assembly 100 at one end and rotatably connected to the sleeve assembly 400 at the other end. In response to the medical staff's operation of the steering drive structure 300, the angle steering member 200 rotates relative to the sleeve assembly 400, thereby driving the jaw assembly 100 to rotate relative to the sleeve assembly 400. The angle steering member 200 includes a body 210 and a protrusion 220 provided on the body 210. The steering drive structure 300 includes a drive assembly 320 and a push rod 310 connected to the drive assembly 320. When the jaw assembly 100 is in the straight-hitting state, the push rod 310 abuts against the protrusion 220. The straight-hitting state means that the length direction of the jaw assembly 100 is collinear or parallel to the axial direction of the sleeve assembly 400. When the medical staff operates the drive assembly 320 , in response to the driving of the drive assembly 320 , the push rod 310 moves distally to push the protrusion 220 to rotate the angle steering member 200 , thereby driving the jaw assembly 100 to rotate relative to the sleeve assembly 400 .

[0054] One of the cannula assembly 400 and the angle steering member 200 is provided with a rotational shaft 421, while the other defines a connection hole 230. This embodiment uses the angle steering member 200 having the connection hole 230 and the cannula assembly 400 having the rotational shaft 421 as an example. The rotational shaft 421 is inserted into the connection hole 230, and its axis coincides with the axis of the connection hole 230. The rotational shaft 421 cooperates with the connection hole 230 to rotatably connect the angle steering member 200 to the cannula assembly 400. The axis of the rotational shaft 421 is the rotational axis K of the angle steering member 200. When the steering drive mechanism 300 drives the angle steering member 200 to rotate, the angle steering member 200 rotates about the rotational axis K. Two push rods 310 are provided. In response to a medical professional's operation, the drive assembly 320 drives one of the push rods 310 to move distally in a first direction. The first direction is parallel to the axis of the cannula assembly 400 and points distally of the cannula assembly 400. As shown in FIG7 , the push rod 310 abuts against the protrusion 220 and applies a driving force O in a first direction to the protrusion 220. The force applied by the push rod 310 to the protrusion 220 generates a component force, which includes a tangential force Q and a radial force perpendicular to the tangential force Q. The line connecting the point of abutment between the push rod 310 and the protrusion 220 and the rotation axis K on a horizontal plane is the driving radius P. The driving radius P is set in the radial direction, wherein the horizontal plane is parallel to the upper surface of the body 210. The tangential force Q is perpendicular to the driving radius P and causes the angle steering member 200 to generate a tangential acceleration, thereby causing the angle steering member 200 to rotate. The radial force is the component force generated by the push rod 310 that is perpendicular to the tangential force Q and does not promote or hinder the rotation of the angle steering member 200.

[0055] As shown in Figures 7 to 10 , during the rotation of the angle deflector 200, when the angle between the jaw assembly 100 and the sleeve assembly 400 varies, the position of the point of contact between the push rod 310 and the protrusion 220 varies, resulting in different directions of the driving radius P and, therefore, different directions of the tangential force Q. Since the driving force O (the force applied to the protrusion 220) of the push rod 310 is fixed in the first direction, the tangential force Q is a component of the driving force O. The magnitude of the tangential force Q depends on the angle between the tangential force Q and the first direction. For example, the magnitude of the tangential force Q is equal to the driving force O multiplied by the cosine of the angle between the two. The smaller the angle, the greater the tangential force Q, while the larger the angle, the smaller the tangential force Q.

[0056] In conventional technology, as shown in Figures 11 and 12, when the jaw assembly 100 is in the straight-striking position, the driving radius P coincides with a first straight line U, which is perpendicular to the axis of the sleeve assembly 400 and intersects the rotation axis K of the body 210. It can be seen that when the jaw assembly 100 is in the straight-striking position, the angle between the driving force O and the tangential force Q is zero. As the jaw assembly 100 rotates relative to the sleeve assembly 400, the angle between the jaw assembly 100 and the sleeve assembly 400 increases, and the angle between the tangential force Q and the driving force O also increases, gradually decreasing the tangential force Q. Simultaneously, the greater the bending of the blade shank 610 of the cutting blade assembly 600, the greater the elasticity of the blade shank 610, which exerts a return force on the jaw assembly 100 (returning the jaw assembly 100 to the straight-striking position), hindering further rotation of the jaw assembly 100. Specifically, the greater the angle of rotation of the jaw assembly 100 relative to the sleeve assembly 400, the smaller the tangential force Q driving the rotation, and the greater the resistance to rotation. The maximum rotation angle of the jaw assembly 100 relative to the sleeve assembly 400 is approximately 40°, that is, when the angle steering member 200 rotates to the extreme position, the angle between the driving radius P and the first straight line U is approximately 40°. At this time, the angle between the tangential force Q and the driving force O is approximately 40°, which makes the tangential force Q smaller. At the same time, the knife rod 610 is bent more, which makes the steering resistance larger. The driving force O of the steering drive structure 300 is insufficient to continue to drive the jaw assembly 100 to turn.

[0057] In the surgical instrument of this embodiment, the maximum rotation angle of the jaw assembly 100 relative to the cannula assembly 400 exceeds the maximum turning angle of the jaw assembly 100 in conventional techniques, making it applicable to a wider range of surgical scenarios and better meeting the medical staff's needs for turning the jaw assembly 100. As shown in Figure 7, the raised portion 220 includes a first end 221 that is distal to the jaw assembly 100. When the jaw assembly 100 is in the straight position, the first end 221 is located below the first straight line U, where the lower side is, for example, the side distal to the jaw assembly 100.

[0058] When the jaw assembly 100 is in the straight-action position, the push rod 310 abuts the first end 221 of the protrusion 220. At this point, the driving radius P is located below the first straight line U and forms a first angle with the first straight line U. The angle between the tangential force Q and the driving force O is also the first angle. In some embodiments, the first angle is less than 40°, such as 30° or 35°. At this point, the knife bar 610 does not bend and does not provide steering resistance, allowing the driving force O provided by the steering drive structure 300 to rotate the angular steering member 200, thereby steering the jaw assembly 100. When the jaw assembly 100 is in the maximum rotation position, the driving radius P is located above the first straight line U and forms a second angle with the first straight line U. In some embodiments, the second angle is less than or equal to 40°, such as 30° or 35°. When the jaw assembly switches from the straight-action position to the maximum rotation position, the first straight line U coincides with the driving radius P when the jaw assembly 100 rotates by the first angle. After the jaw assembly 100 rotates by the second angle, it switches to the maximum rotation position. Therefore, the angle at which the jaw assembly 100 rotates relative to the sleeve assembly 400 is equal to the sum of the first angle and the second angle. In the embodiment of the present disclosure, the maximum angle at which the jaw assembly 100 rotates relative to the sleeve assembly 400 is 60-70°.

[0059] As shown in Figures 7 and 8, when the jaw assembly 100 is in the straight-hitting state, in response to the drive of the drive assembly 320, one of the push rods 310 moves distally along the first direction to push the protrusion 220, and the driving force O of the push rod 310 generates a tangential force Q perpendicular to the driving radius P, and the tangential force Q drives the angle steering member 200 to rotate; when the jaw assembly 100 rotates a first angle relative to the sleeve assembly 400, as shown in Figure 9, the driving radius P substantially coincides with the first straight line U. At this time, the tangential force Q and the driving force O are on the same straight line, and the driving force O no longer generates a radial component force (radial force). In the above process, the jaw assembly The angle between the jaw assembly 100 and the sleeve assembly 400 gradually increases, but the angle between the driving force O and the tangential force Q gradually decreases; when the jaw assembly 100 continues to rotate from the position where the driving radius P substantially coincides with the first straight line U, it rotates to a second angle to reach the limit position, as shown in FIG10 . The second angle is less than or equal to 40°. At this time, the angle between the tangential force Q and the driving force O is the second angle. During this process, the angle between the jaw assembly 100 and the sleeve assembly 400 increases, and the angle between the driving force O and the tangential force Q also increases. The tangential force Q decreases, and the bending amplitude of the knife bar 610 increases, resulting in an increase in the steering resistance generated. When the jaw assembly 100 rotates to the limit position, the tangential force Q is small, and the steering resistance generated by the knife bar 610 is large. The driving force O of the steering drive structure 300 is insufficient to continue to drive the jaw assembly 100 to turn.

[0060] As can be seen from the above, during the rotation of the jaw assembly 100 of the surgical instrument in this embodiment to its extreme position, the angle between the driving force O and the tangential force Q first decreases and then increases, with the maximum angle being less than or equal to 40°. The tangential force Q remains at a high level, allowing for smooth rotation. The maximum rotation angle of the jaw assembly is substantially greater than the maximum turning angle of the jaw assembly 100 in conventional techniques by a first angle, which is less than or equal to 40°. In some embodiments, the first angle is greater than or equal to 30° and the second angle is less than or equal to 40°, resulting in a maximum rotation angle of the jaw assembly 100 relative to the cannula assembly 400 of approximately 70°. This allows for application in a wider range of surgical scenarios and better meets the needs of medical personnel for steering the jaw assembly 100. Furthermore, when the jaw assembly 100 is in the straight position, the angle between the driving radius P and the first straight line U is greater than or equal to 30°. At this time, the knife bar 610 is not bent, generating no elastic force that would hinder the rotation of the jaw assembly 100, ensuring that the tangential force Q is sufficient to drive the jaw assembly 100 to rotate.

[0061] For example, as shown in Figures 7 to 10, the raised portion 220 includes a first surface 222 and abutting surface 223. The first surface 222 is formed at the first end 221, and the abutting surface 223 is provided on the side of the raised portion 220 close to the rotation axis K of the body 210 and connected to the first surface 222. The raised portion 220 is arranged in a strip shape. When the jaw assembly 100 is in the straight-hitting state, the first surface 222 of the raised portion 220 corresponds to the push rod 310, and the push rod 310 abuts the first surface 222. Correspondence means that the push rod 310 and the first surface 222 of the raised portion 220 are opposite each other in the longitudinal direction of the push rod 310. When the jaw assembly 100 is in the maximum rotation state, the push rod 310 abuts the abutting surface 223. When the angle steering member 200 rotates, the protrusion 220 rotates accordingly, and the protrusion 220 is laterally offset during the rotation, so that the first surface 222 is staggered with the push rod 310, and the abutting surface 223 of the protrusion 220 corresponds to the push rod 310, and the push rod 310 abuts against the abutting surface 223. When the jaw assembly 100 rotates to the maximum rotation state, when the angle steering member 200 rotates to the maximum angle, the abutting surface 223 abuts against the push rod 310, that is, during the rotation of the angle steering member 200, the push rod 310 always abuts against the protrusion 220 to avoid the protrusion 220 being completely staggered with the push rod 310 due to lateral offset during rotation, and the push rod 310 cannot drive the angle steering member 200 to move.

[0062] As shown in FIG10 , when the jaw assembly 100 is in the maximum rotation state, the distal end surface of the push rod 310 is in contact with the abutment surface 223. When the jaw assembly 100 is in the maximum rotation state, the bending amplitude of the knife bar 610 is the largest, and the elastic force generated by the knife bar 610 to return the jaw assembly 100 to its original position is also the largest. After the jaw assembly 100 is turned, the jaw drive structure is no longer operated, and the locking assembly 330 locks the push rod 310. The push rod 310 abuts against the abutment surface 223 to limit the position of the jaw assembly 100, preventing the jaw assembly 100 from rotating in the direction of the knife bar 610 elastic force. The distal end surface of the push rod 310 is a plane, and the contact area is maximized when it is in contact with the abutment surface 223, so that the steering drive structure 300 has the best positioning effect on the jaw assembly 100, preventing the angle steering member 200 from rotating before being locked by the locking member 500, thereby maintaining the jaw assembly 100 at the maximum angle desired by the medical staff.

[0063] For example, as shown in Figures 1, 13, and 14, the locking member 500 locks the angle steering member 200 when the jaw assembly 100 is closed. The sleeve assembly 400 includes an outer sleeve 410, which is connected to the jaw assembly 100 and is in transmission connection with the locking member 500. After the jaw assembly 100 completes the steering, the medical staff operates the stapler to move the outer sleeve 410 distally. The outer sleeve 410 moving distally drives the jaw assembly 100 to close and simultaneously drives the locking member 500 to move and lock the angle steering member 200. The locked angle steering member 200 cannot rotate, facilitating subsequent surgery.

[0064] The body 210 of the angle steering member 200 has an outer peripheral surface 240, which is arranged around the rotation axis K of the body 210 and is arranged on the periphery of the angle steering member 200. The body 210 also includes a mating portion 250 and a wall portion 260. The wall portion 260 has a certain thickness. The mating portion 250 is located on the inner side of the wall portion 260, and the outer peripheral surface 240 is located on the outer side of the wall portion 260, separating the mating portion 250 from the outer peripheral surface 240. Before the jaw assembly 100 is closed, the locking member 500 is separated from the mating portion 250, and the angle steering member 200 is not locked by the locking member and can rotate freely. When the outer sleeve 410 moves distally to drive the jaw assembly 100 to close, it simultaneously drives the locking member 500 to move and engage with the mating portion 250, thereby locking the angle steering member 200. The surgical instrument includes a motion conversion structure. The outer sleeve 410 is connected to the locking member 500 via a transmission mechanism to drive the locking member 500. The present disclosure only provides a preliminary introduction to the connection method between the locking member 500 and the outer sleeve 410 . The specific mechanisms of the locking member 500 and the motion conversion structure can refer to the general design.

[0065] The mating portion 250 includes a plurality of grooves 251 formed in the body 210. The grooves 251 are arranged around the rotation center of the body 210. The locking member 500 includes locking teeth. When the locking member 500 engages with the mating portion 250, the locking teeth insert into the grooves 251 to lock the angle steering member 200. The grooves 251 formed in the body 210 may reduce the overall strength of the angle steering member 200. When the jaw assembly 100 switches from a straight-strike position to a steered position, the angle steering member 200 must have sufficient strength to withstand the elastic force generated by the bending of the blade 610 during the movement of the jaw assembly 100 and while the jaw assembly remains in the steered position. The steered position refers to the jaw assembly and the sleeve assembly being at a certain angle relative to each other. As shown in Figure 15, the angle steering member 200 in this embodiment also includes a reinforcement portion 270, which is arranged on the upper surface of the main body 210. In the thickness direction of the main body 210, the reinforcement portion 270 at least partially corresponds to the groove 250. For example, the reinforcement portion 270 and the groove 251 are respectively located on both sides of the upper surface to enhance the strength of the portion of the main body 210 where the groove 250 is opened, thereby avoiding possible damage to the angle steering member 200 during the steering process of the jaw assembly 100 and when the jaw assembly 100 remains in the steering state.

[0066] For example, as shown in Figures 7 and 15 , the reinforcement portion 270 is located on the side of the raised portion 220 that is closer to the jaw assembly 100, avoiding contact with the push rod 310 and thus preventing interference with the rotation of the angle deflection member 200. For example, the reinforcement portion 270 is connected to the raised portion 220. This connection between the reinforcement portion 270 and the raised portion 220 can further enhance the strength of the reinforcement portion 270, thereby enhancing the strength of the angle deflection member 200. For another example, in this embodiment, the reinforcement portion 270 and the raised portion 220 are integrally formed, and the reinforcement portion 270 extends toward the jaw assembly 100.

[0067] As shown in Figures 3 and 5, the surgical instrument further includes an angle connection assembly 700, which is connected between the jaw assembly 100 and the cannula assembly 400. When the jaw assembly 100 rotates relative to the cannula assembly 400 from the straight-on position, the angle connection assembly 700 rotates along with the angle steering member 200. The angle connection assembly 700 is used to accommodate the knife rod 610 of the cutting knife assembly 600. For example, the angle connection assembly 700 includes a first angle connection member 710 and a second angle connection member 720. The distal end of the first angle connection member 710 is rotatably connected to the jaw assembly 100, and the proximal end is rotatably connected to the distal end of the second angle connection member 720. The proximal end of the second angle connection member 720 is rotatably connected to the cannula assembly 400 and can slide along the length of the cannula assembly 400. The first angled connector 710 defines a first receiving slot 711, and the second angled connector 720 defines a second receiving slot 721. The knife bar 610 sequentially passes through the second receiving slot 721 and the first receiving slot 711 to enter the jaw assembly 100. As shown in FIG3 , when the jaw assembly 100 is in the straight-stroke position, the first angled connector 710 and the second angled connector 720 are arranged along the length of the sleeve assembly 400. As shown in FIG5 , when the jaw assembly 100 is in the maximum rotation position, the first angled connector 710 and the second angled connector 720 are driven by the jaw assembly 100 to swing, and the first angled connector 710 and the second angled connector 720 are arranged in a broken line. In this embodiment, the jaw assembly 100 rotates at a larger angle relative to the sleeve assembly 400, so the swing amplitude of the first angle connector 710 and the second angle connector 720 is also larger, and the lateral displacement is larger. The reinforcement portion 270 may block the first angle connector 710 and the second angle connector 720, resulting in the jaw assembly 100 being unable to turn smoothly.

[0068] As shown in FIG16 , the reinforcement portion 270 of this embodiment is provided with an avoidance slope 280 on the side facing the rotation axis K of the body 210. The reinforcement portion 270 avoids the rotating angle connection assembly 700 via the avoidance slope 280. When the jaw assembly 100 is in the maximum rotation state, the angle connection assembly 700 is separated from the reinforcement portion 270. When the jaw assembly 100 is in the straight-engaging state, the reinforcement portion 270 is located on one side of the angle connection assembly 700 in the lateral direction. When the jaw assembly 100 is in the maximum rotation state, the lateral displacement of the angle connection assembly 700 is the largest. The jaw assembly 100 does not contact the reinforcement portion 270. During the process of rotating the jaw assembly 100 from the straight-engaging state to the maximum rotation state, the jaw assembly 100 remains separated from the reinforcement portion 270. That is, during the rotation of the jaw assembly 100, the reinforcement portion 270 does not block the angle connection assembly 700 and does not hinder the rotation of the jaw assembly 100 relative to the sleeve assembly 400.

[0069] As shown in FIG7 , the angle steering member 200 includes two protrusions 220 symmetrically disposed on the body 210. For example, the two protrusions 220 are symmetrical about a first plane that passes through the centerline of the jaw assembly 100 and is perpendicular to the upper surface of the body 210. The steering drive structure 300 includes two push rods 310, both of which are connected to a drive assembly 320. The drive assembly 320 drives the push rods 310 to move, thereby driving the angle steering member 200 to rotate.

[0070] The drive assembly 320 includes an operating handle 321, a transmission member 322, and a gear member 323. The operating handle 321 is connected to the gear member 323 via the transmission member 322. As shown in Figures 17 and 18, the transmission member 322 is connected to the gear member 323, and the gear member 323 is connected to the angle steering member 200 via the push rod 310. In response to the rotation of the operating handle 321, the transmission member 322 is driven by the operating handle 321 to rotate, driving the push rod 310 assembly to move through the gear member 323. The gear member 323 converts the torque applied by the medical staff to the operating handle 321 into a force that drives the push rod 310 assembly to move linearly.

[0071] For example, as shown in Figures 17 and 18, two gear members 323 are formed, and a tooth structure 3224 is provided on the lower side of the transmission member 322. The two gear members 323 are respectively located on both sides of the transmission member 322 and mesh with the transmission member 322. The two push rods 310 are respectively meshed with the two gear members 323. In response to the rotation of the operating handle 321, the transmission member 322 rotates to drive the gear members 323 on both sides to rotate. The gear members 323 drive the two push rods 310 to move, thereby driving the angle steering member 200 to rotate. In this embodiment, the push rod 310 includes a left push rod 311 and a right push rod 312. The left push rod 311 and the right push rod 312 respectively abut the two protrusions 220 on both sides of the angle steering member 200. The gear member 323 includes a left gear portion and a right gear portion. The left gear portion and the right gear portion are connected to the frame 800 and are respectively located on both sides of the transmission member 322. The left and right gear units each include two coaxially arranged upper and lower gears. The left push rod 311 meshes with the lower gear of the left gear unit, while the right push rod 312 meshes with the lower gear of the right gear unit. The transmission member 322 meshes with both the upper gears of the left and right gear units. When a medical professional rotates the operating handle 321, the transmission member 322 drives the left and right gear units to rotate in opposite directions, causing the left and right push rods 311 and 312 to move in opposite directions. The left push rod 311 and the right push rod 312 both extend along the length of the sleeve assembly 400. The distal ends of the left push rod 311 and the right push rod 312 respectively abut against the two protrusions 220 of the angle steering member 200. When the operating handle 321 rotates to drive the left push rod 311 and the right push rod 312 to move, for example, when the operating handle 321 is rotated clockwise, the left push rod 311 moves distally and the right push rod 312 moves proximally. The left push rod 311 pushes the left protrusion 220 of the angle steering member 200 to move distally, causing the angle steering member 200 to rotate to the right. The right abutment is driven to rotate and separate from the right push rod 312. When the operating handle 321 is rotated counterclockwise, the left push rod 311 moves proximally and the right push rod 312 moves distally. Similarly, the angle steering member 200 rotates to the left, causing the push rod 310 assembly to drive the angle steering member 200 to rotate, thereby driving the jaw assembly 100 to rotate.

[0072] The operating handle 321 has a locked position and an unlocked position. In the locked position, the operating handle 321 is locked by the locking assembly 330, and the medical staff cannot rotate the operating handle 321. In the unlocked position, the operating handle 321 is unlocked from the locking assembly 330, and the medical staff can rotate the operating handle 321. In response to the rotation of the operating handle 321, the transmission assembly drives the angle steering member 200 to move, thereby driving the jaw assembly 100 to rotate. For example, the operating handle 321 can be slidably connected to the transmission member 322. When the operating handle 321 is moved, it slides relative to the transmission member 322 to switch from the locked position to the unlocked position. The operating handle 321 can slide relative to the transmission member 322 and can drive the transmission member 322 to rotate. The following describes how to achieve the operating handle 321 being able to both slide relative to the transmission member 322 and drive the transmission member 322 to rotate.

[0073] As shown in Figures 18 and 19, in some embodiments, the operating handle 321 includes a locking portion, and the locking assembly 330 includes a locking slot 331. When the operating handle 321 is in the unlocked position, the locking portion is separated from the locking slot 331, and the medical staff can rotate the operating handle 321; when the operating handle 321 is in the locked position, the locking portion is plugged into the locking slot 331, and the operating handle 321 is locked and cannot be rotated.

[0074] The transmission member 322 is generally cylindrical in shape, with a sliding space 3223 defined thereon and a tooth structure 3224 at its bottom for engaging with the gear assembly. The sliding space 3223 is located at the top of the transmission member 322. The operating handle 321 includes an operating portion 3211 and a driving portion 3212. A locking portion is provided on the driving portion 3212. The operating portion 3211 and the driving portion 3212 are pluggably connected or integrally formed. When the operating portion 3211 rotates, the driving portion 3212 is driven to rotate synchronously. The lower portion of the driving portion 3212 is located within the sliding space 3223. In this embodiment, when the jaw assembly 100 is in the straight-hitting position, the sliding space 3223 is provided along the axis of the sleeve assembly 400, allowing the operating handle 321 to slide along the axis of the sleeve assembly 400 relative to the transmission member 322. The straight-hitting position refers to the position in which the length direction of the jaw assembly 100 is substantially aligned with the axis direction of the sleeve assembly 400. When rotating the operating handle 321, the operating handle 321 is first moved proximally or distally along the axis of the sleeve assembly 400 to switch from the locked position to the unlocked position. That is, the operating handle 321 is unlocked by pushing the operating handle 321 forward. The operating handle 321 includes a locking portion, and the locking assembly 330 includes a locking groove 331. When the operating handle 321 is in the unlocked position, the locking portion is separated from the locking groove 331. When the operating handle 321 is in the locked position, the locking portion is engaged with the locking groove 331. The locking portion is, for example, a protrusion.

[0075] For example, the transmission member 322 includes a transmission member body and an end member 3221. The end member 3221 is located within the sliding space 3223 and is fixedly connected to the transmission member body. The end member 3221 is fixed to the transmission member body via screws. For example, the end member 3221 is located at the far end of the sliding space 3223. Slide grooves 3222 are defined on both sides of the end member 3221 in the width direction. The length direction of the slide grooves 3222 is the same as the length direction of the sliding space 3223. The driving portion 3212 includes two sliders 3213. The two sliders 3213 are respectively inserted into the two slide grooves 3222 on both sides of the end member 3221 to slideably connect the driving member and the end member 3221. The operating handle 321 is slidably connected to the transmission member 322. When the operating handle 321 is rotated to the left, the right portion of the slider 3213 abuts against the bottom of the right slide groove 3222, driving the transmission member 322 to rotate to the left. The same applies to rightward rotation.

[0076] The steering drive structure 300 also includes an elastic member 3225, one end of the elastic member 3225 is connected to the transmission member 322, and the other end is connected to the operating handle 321. The elastic member 3225 is arranged along the sliding direction of the operating handle 321. When the operating handle 321 is in the unlocked position, the elastic member 3225 is compressed. When the operating handle 321 is in the locked position, the elastic member 3225 is released. The elastic force of the elastic member 3225 keeps the operating handle 321 in the locked position. In this embodiment, the operating handle 321 moves along the axis of the cannula to switch from the locked position to the unlocked position, for example, by moving distally along the axis of the cannula assembly 400 to switch to the unlocked position. Before the medical staff operates the operating handle 321, the operating handle 321 is in the locked position under the action of the elastic member 3225. The medical staff applies a forward pushing force to the operating handle 321 to move the operating handle 321 distally to the unlocked position. The elastic member 3225 is compressed, maintaining the forward pushing force on the handle while rotating the operating handle 321, driving the jaw assembly 100 to rotate. After the rotation is completed, the medical staff releases the operating handle 321, the elastic member 3225 is released, and the operating handle 321 is driven back to the locked position. As can be seen from the above, after controlling the rotation of the jaw assembly 100, the medical staff releases the operating handle 321, and the locking assembly 330 can automatically switch and fix the operating handle 321 in the locked position, automatically locking the two push rods 310 without the medical staff performing additional operations. When the operating handle 321 is not pushed, the operating handle 321 cannot be rotated, so that the medical staff cannot rotate the operating handle 321 by mistake, so that the jaw assembly 100 will not rotate due to the medical staff's mistaken operation. Regarding the structure of the steering drive assembly 320, only a preliminary description is given in this embodiment. The specific structure can refer to the general design.

[0077] The distal ends of the two push rods 310 are respectively located on either side of the inner sleeve 420. When the jaw assembly 100 is in the straight-action state, the distal ends of the two push rods 310 respectively abut the first ends 221 of the two protrusions 220. When the medical staff does not operate the operating handle 321, the operating handle 321, the transmission member 322, and the gear member 323 are all locked, so that the two push rods 310 are also locked. The locked push rods 310 limit the angle steering member 200 by abutting the protrusions 220, preventing the jaw assembly 100 from deviating from the straight-action state. When the medical staff rotates the operating handle 321 to rotate the angle steering member 200 to one side, one push rod 310 moves distally and the other push rod 310 moves proximally. In this embodiment, the angle steering member 200 is rotated to the left as an example. The medical staff first pushes the operating handle 321 forward to unlock the operating handle 321, and rotates the operating handle 321 to the left. The right push rod 310 moves distally and the left push rod 310 moves proximally. The right push rod 310 pushes the raised portion 220 on the right side of the angle steering member 200, causing the angle steering member 200 to rotate to the left around the rotating shaft 421. In the length direction of the sleeve assembly 400, the raised portion 220 on the right side moves upward and the raised portion 220 on the left side moves downward. The right push rod 310 always presses against the right raised portion 220, and the left push rod 310 moves proximally and separates from the left raised portion 220. After the jaw assembly 100 is rotated to a suitable angle, the medical staff stops rotating the operating handle 321 and releases the operating handle 321. After the operating handle 321 is released, it moves proximally under the action of the elastic member 3225, so that the locking portion of the operating handle 321 cooperates with the locking assembly 330, so that the operating handle 321 and the gear member 323 are both locked, and then the left push rod 311 and the right push rod 312 are locked. The locked right push rod 312 presses against the protrusion 220 of the angle steering member 200, and the locked left push rod 311 is separated from the angle steering member 200.

[0078] The drive assembly in the embodiment of the present disclosure can also be in other forms, such as a motor driving a gear to rotate, and utilizing the above-mentioned gear to drive the push rod to move distally and proximally. It is also possible to rely on a power source (motor or operating handle) to drive the push rod to move distally and proximally through a connecting rod mechanism. The connecting rod mechanism may include a rotating rod rotatably arranged on the frame, the proximal end of the left push rod 311 and the proximal end of the right push rod 312 are respectively connected to the two sides of the rotating rod, and the power source (motor or operating handle) is connected to the rotating rod. In response to the drive of the power source, the rotating rod rotates, causing the left push rod 311 and the right push rod 312 to move in opposite directions.

[0079] In an embodiment of the present disclosure, as shown in Figures 20 to 22, the surgical instrument further includes a stopper 290 disposed on the angle steering member 200. The stopper 290 is located on a side of the protrusion 220 close to the rotation axis K of the body 210 and is spaced apart from the protrusion 220. The push rod 310 has a first side away from the axis of the sleeve assembly 400 and a second side close to the axis of the sleeve assembly 400. When the angle steering member 200 rotates, the first side of the push rod 310 abuts against the abutment surface 223 to prevent the angle steering member 200 from deflecting toward the second side. At the same time, the stopper 290 is located on the second side of the push rod 310 and is stopped by the push rod 310 to prevent the angle steering member 200 from deflecting toward the first side. Deflection of the angle steering member 200 toward both the first and second sides is restricted, thereby preventing the angle steering member 200 from deflecting after the push rod 310 is locked. That is, after the two push rods 310 are locked, although one push rod 310 is separated from the angle steering member 200 , the other push rod 310 can stop the angle steering member 200 from rotating toward the first side or the second side, thereby locking the angle steering member 200 .

[0080] For example, the push rod 310 defines a mating groove 313 located at the bottom of the push rod 310, i.e., on the side of the push rod 310 proximate to the upper surface of the angle steering member 200. When the jaw assembly 100 is in the straight-action position, the stopper 290 disengages from the mating groove 313. In response to rotation of the angle steering member 200 relative to the sleeve assembly 400, the stopper 290 rotates with the angle steering member 200, with a portion of the stopper 290 entering the mating groove 313 and the remaining portion abutting against the second side of the push rod 310 to limit and stop the push rod 310. When the angle steering member 200 rotates, the limit member 290 rotates accordingly and moves laterally (perpendicular to the axial direction of the sleeve assembly 400) toward the direction of the push rod 310, and the limit member 290 always partially abuts against the second side of the push rod 310. The setting of the matching groove 313 avoids interference between the push rod 310 and the limit member 290, so that the rotation of the angle steering member 200 can proceed normally.

[0081] For example, the stopper 290 is block-shaped and protrudes from the upper surface of the angle steering member 200. Two stoppers 290 are provided, one corresponding to each of the two push rods 310. The stopper 290 includes a block body 291, a first portion 292, and a second portion 293. The first portion 292 and the second portion 293 both extend outward from the block body 291. The first portion 292 extends toward the push rod 310, and the second portion 293 extends at a predetermined angle relative to the first portion 292. The second portion 293 is located on the side of the stopper 290 proximal to the steering hole, while the first portion 292 is located on the side of the stopper 290 distal to the steering hole. In response to distal movement of the push rod 310, the angle steering member 200 rotates, and the stopper 290 rotates with the angle steering member 200. The first portion 292 is inserted into the mating groove 313, and the second portion 293 is located on the second side of the push rod 310 to limit and stop the push rod 310. For example, an arc-shaped protrusion 314 is also provided in the mating groove 313. When the limiting member 290 rotates with the angle steering member 200, the arc-shaped protrusion 314 guides the first part 292 into the mating groove 313 and approaches the block body 291 of the limiting member 290. When the angle steering member 200 deflects toward the first side, the second part 293 resists the push rod 310. The greater the rotation angle of the angle steering member 200, the closer the end of the second part 293 is to the mating groove 313. When the angle steering member 200 rotates at a larger angle, the second part 293 corresponds to the arc-shaped protrusion in the mating groove 313 and is resisted by the arc-shaped protrusion 314 to limit the push rod 310.

[0082] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0083] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A surgical instrument, comprising a jaw assembly, a sleeve assembly, an angle steering member and a steering drive structure, wherein one end of the angle steering member is connected to the jaw assembly, and the other end is rotatably connected to the sleeve assembly; The angle turning member comprises a body and a protrusion provided on the body, the protrusion comprises a first end away from the jaw assembly, when the jaw assembly is in a straight striking state, the first end is located at the lower side of a first straight line, the first straight line passes through the rotation axis of the body and is perpendicular to the axis of the sleeve assembly; The steering drive structure includes a push rod that can move distally and proximally in a direction parallel to the axis of the sleeve assembly. When the jaw assembly is in a straight-hitting state, the push rod abuts against the first end of the protrusion. In response to the distal movement of the push rod, the push rod pushes the protrusion to cause the angle steering member to rotate around the rotation axis, thereby driving the jaw assembly to rotate relative to the sleeve assembly.

2. The surgical instrument according to claim 1, wherein: The protrusion includes a first surface and abutment surface, the first surface is formed at the first end, the buttress surface is arranged on a side of the protrusion close to the rotation axis of the body and connected to the first surface, when the jaw assembly is in a straight striking state, the push rod butts against the first surface; when the jaw assembly is in a maximum rotation state, the push rod butts against the buttress surface; The line connecting the point of action of the push rod and the protrusion abutting against each other on the horizontal plane and the rotation axis is the driving radius. When the jaw assembly is in the direct hitting state, the driving radius and the first straight line form a first angle with each other; when the jaw assembly is in the maximum rotation state, the driving radius and the first straight line form a second angle with each other; when the jaw assembly switches from the direct hitting state to the maximum rotation state, the rotation angle of the jaw assembly relative to the sleeve assembly is equal to the sum of the first angle and the second angle.

3. The surgical instrument according to claim 2, wherein: The first angle is less than or equal to 40°, and the sum of the first angle and the second angle is greater than or equal to 60° and less than or equal to 70°.

4. The surgical instrument according to claim 1 or 2, wherein: When the jaw assembly is in the maximum rotation state, the distal end surface of the push rod is in contact with the abutment surface, so that the jaw assembly is maintained in the maximum rotation state.

5. The surgical instrument according to any one of claims 1 to 4, wherein: The surgical instrument further comprises a locking member, the body is provided with a groove, and the locking member cooperates with the groove to lock the angle turning member; The angle turning member further includes a reinforcing portion disposed on the body, and in the thickness direction of the body, the reinforcing portion is at least partially opposite to the groove.

6. The surgical instrument according to claim 5, wherein: The reinforcing portion is located on a side of the protruding portion close to the jaw assembly and is connected to the protruding portion.

7. The surgical instrument according to claim 5 or 6, wherein: The surgical instrument also includes an angle connection assembly, which is connected between the jaw assembly and the sleeve assembly. When the jaw assembly rotates relative to the sleeve assembly from the straight hitting state, the angle connection assembly rotates with the jaw assembly. The reinforcement portion is provided with an avoidance slope on the side of the rotation axis of the main body, and the reinforcement portion avoids the rotating angle connection assembly through the avoidance slope.

8. The surgical instrument according to any one of claims 1 to 7, wherein: The angle steering member includes two protrusions, and the two protrusions are respectively arranged on one side and the other side of the rotating axis along the transverse direction. The steering drive structure includes two push rods. When the jaw assembly is in a straight hitting state, the two push rods respectively resist the first ends of the two protrusions; one push rod moves distally to push the protrusion to rotate the body, and the other push rod moves proximally.

9. The surgical instrument according to any one of claims 1 to 8, wherein: The steering drive structure further includes a drive assembly, and the push rod is connected to the drive assembly; in response to the driving of the drive assembly, the push rod moves distally to push the protrusion.

10. The surgical instrument according to claim 9, wherein: The driving assembly comprises an operating handle, a transmission member and a gear member, and the operating handle is transmission-connected to the gear member through the transmission member; The angle steering member includes two protrusions, which are laterally arranged on one side and the other side of the rotating axis respectively; the steering drive structure includes two push rods, which are provided with matching teeth, and the two push rods are respectively located on both sides of the gear member and are meshed with the gear member through the matching teeth; when the jaw assembly is in a straight hitting state, the two push rods respectively abut against the first ends of the two protrusions; in response to the operating handle being operated, the gear member rotates to drive the two push rods to move, and the movement directions of the two push rods are opposite.

11. The surgical instrument according to claim 10, wherein: The operating handle includes a locking portion, and the steering drive structure also includes a locking assembly. When the operating handle is in a locked position, the locking portion cooperates with the locking assembly; when the operating handle is in an unlocked position, the locking portion is separated from the locking assembly. In response to the operating handle being operated, the operating handle switches from the locked position to the unlocked position.

12. The surgical instrument according to claim 11, wherein: The operating handle is slidably connected to the transmission member, and the steering drive structure further comprises an elastic member, one end of the elastic member is connected to the transmission member, and the other end is connected to the operating handle, and the elastic member is arranged along the sliding direction of the operating handle. When the operating handle is switched from the locking position to the unlocking position, the operating handle slides to separate from the locking assembly, and the elastic member is compressed; When the operating handle switches from the unlocking position to the locking position, the elastic member is released, driving the operating handle to slide to cooperate with the locking assembly.

13. The surgical instrument according to any one of claims 1 to 12, wherein: The surgical instrument also includes a limit member arranged on the angle steering member, the limit member is located on the side of the protrusion close to the rotation axis of the main body and is separated from the protrusion; the push rod has a first side away from the axis of the sleeve assembly and a second side close to the axis of the sleeve assembly, in response to the rotation of the angle steering member relative to the sleeve assembly, the first side of the push rod abuts against the protrusion, and the limit member is located on the second side of the push rod and is stopped by the push rod.

14. The surgical instrument according to claim 13, wherein: The push rod is provided with a matching groove, and when the jaw assembly is in a straight-hitting state, the limit member is separated from the matching groove; the limit member includes a first part and a second part, and in response to the rotation of the angle steering member relative to the sleeve assembly, the limit member rotates with the angle steering member, the first part enters the matching groove, and the second part is located on the second side of the push rod and is limited and stopped by the push rod.

15. The surgical instrument according to claim 13 or 14, wherein: The limiter also includes a main body portion of the angle turning member, the first part and the second part are both connected to the main body portion and protrude outward from the main body portion, and the protruding direction of the first part and the protruding direction of the second part form a certain angle with each other.

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