Surgical instrument

Abstract

Provided in the present disclosure is a surgical instrument. The surgical instrument comprises a jaw assembly, a sleeve assembly, an angle steering member, an angle connecting assembly and a cutter assembly, wherein the jaw assembly is rotatably connected to the sleeve assembly by means of the angle steering member; and the angle connecting assembly comprises a first angle connecting member and a second angle connecting member. The surgical instrument further comprises a sliding member, the sliding member being slidably connected to the sleeve assembly, and a proximal end of the second angle connecting member is rotatably connected to the sliding member; and in response to rotation of the angle steering member, the angle connecting assembly rotates to push the sliding member to slide in an axal direction of the sleeve assembly. When the jaw assembly rotates relative to the sleeve assembly, the proximal end of the second angle connecting member slides towards a proximal end in the axal direction of the sleeve assembly, such that a proximal end of a second storage groove corresponds to a distal end of a straight storage groove, and a part of a cutter rod that is located between the straight storage groove and the second storage groove extends along a straight line, so that the cutter rod can enter the second storage groove without being bent, thereby ensuring normal feeding of a cutter and the cutter feeding efficiency.

Description

surgical instruments

[0001] This application claims priority to Chinese Patent Application No. 202310805415.5 filed on June 30, 2023, and the contents of the above-mentioned Chinese patent application disclosure are hereby incorporated by reference in their entirety as a part of this application. Technical Field

[0002] Embodiments of the present disclosure relate to a surgical instrument. Background Art

[0003] 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 staplerizing the tissue.

[0004] Summary of the Invention

[0005] The present disclosure provides a surgical instrument, which prevents the receiving groove of the angle connector from being misaligned with the receiving groove of the straight portion when the jaw assembly is turned, thereby preventing the knife rod from being significantly bent.

[0006] The embodiments of the present disclosure include: a surgical instrument, comprising a jaw assembly, a cannula assembly, an angle steering member, an angle connecting assembly, and a cutting knife assembly, wherein the jaw assembly is rotatably connected to the cannula assembly via the angle steering member; the cutting knife assembly comprises a knife rod and a knife head connected to the distal end of the knife rod;

[0007] The angle connection assembly includes a first angle connection member and a second angle connection member, wherein the distal end of the first angle connection member is rotatably connected to the angle steering member, and the proximal end of the first angle connection member is rotatably connected to the distal end of the second angle connection member;

[0008] The sleeve assembly is provided with a straight portion receiving groove along the axial direction, the first angle connecting member is provided with a first receiving groove, the second angle connecting member is provided with a second receiving groove, and the knife bar is accommodated in the straight portion receiving groove, the second receiving groove and the first receiving groove from proximal to distal; when the jaw assembly is configured to be in a straight striking state, the length direction of the jaw assembly is collinear with the axis of the sleeve assembly, and the proximal opening of the second receiving groove is aligned with the distal opening of the straight portion receiving groove;

[0009] The surgical instrument also includes a sliding member, which is slidably connected to the sleeve assembly along the axial direction of the sleeve assembly, and the proximal end of the second angle connecting member is rotatably connected to the sliding member; in response to the rotation of the angle steering member, the jaw assembly is configured to rotate relative to the sleeve assembly so that the jaw assembly is in a bent state, and the angle connecting assembly is configured to rotate to push the sliding member to slide toward the proximal end along the axial direction of the sleeve assembly, so that the proximal opening of the second receiving groove remains aligned with the distal opening of the straight portion receiving groove.

[0010] Furthermore, the sleeve assembly includes a tool holder and a thimble seat connected to the tool holder, the straight portion receiving groove includes a tool holder receiving groove opened in the tool holder, and the angle turning member is rotatably connected to the thimble seat.

[0011] Furthermore, the sliding member is arranged between the second angle connecting member and the tool holder, and the straight portion receiving groove also includes a third receiving groove opened on the sliding member, and the tool rod is accommodated in the tool holder receiving groove, the third receiving groove, the second receiving groove and the first receiving groove from near to far; when the jaw assembly is in a straight hitting state, the proximal opening of the second receiving groove is aligned with the distal opening of the third receiving groove; when the jaw assembly is in a bent hitting state, the proximal opening of the second receiving groove remains aligned with the distal opening of the third receiving groove.

[0012] Further, the tool rod includes an exposed section located between the tool holder receiving slot and the third receiving slot;

[0013] The surgical instrument also includes a limit assembly, which is arranged on the sleeve assembly and the sliding member. When the jaw assembly is in a straight hitting state or a bent hitting state, the limit assembly provides a lateral limit stop for the exposed section on both sides of the exposed section.

[0014] Furthermore, the limiting assembly includes a first limiting portion arranged on the sleeve assembly and a second limiting portion arranged on the sliding member, the first limiting portion is provided with a first limiting groove, and the second limiting portion is provided with a second limiting groove; the first limiting groove and the second limiting groove both limit the exposed section in the lateral direction.

[0015] Furthermore, the first limiting portion and the second limiting portion are staggered in the height direction of the knife rod.

[0016] Furthermore, the limiting assembly includes a first limiting portion provided on the sleeve assembly and a second limiting portion provided on the sliding member, wherein the first limiting portion is located on one side of the exposed section along the thickness direction thereof, and the second limiting portion is located on the other side of the exposed section along the thickness direction thereof;

[0017] At least a portion of the exposed section is simultaneously stopped in the lateral direction by the first limiting portion and the second limiting portion.

[0018] Furthermore, the ejector seat is provided with a sliding groove along the axial direction of the sleeve assembly, and the sliding member includes a slider, which is slidably disposed in the sliding groove; when the jaw assembly is in a straight hitting state, the proximal opening of the second receiving groove is aligned with the distal opening of the tool holder receiving groove; when the jaw assembly is in a bent hitting state, the proximal opening of the second receiving groove remains aligned with the distal opening of the tool holder receiving groove.

[0019] The beneficial effect of the present disclosure is that when the jaw assembly rotates relative to the sleeve assembly from the straight hitting state, the first angle connecting member and the second angle connecting member rotate, and under the action of the sliding member, the proximal end of the second angle connecting member slides toward the proximal end along the axial direction of the sleeve assembly, thereby aligning the proximal opening of the second receiving groove with the distal opening of the straight receiving groove, and the part of the knife rod located between the straight receiving groove and the second receiving groove will not bend significantly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic structural diagram of a surgical instrument according to at least one embodiment of the present disclosure;

[0021] FIG2 is a schematic structural diagram of a rotatable connection between a jaw assembly and a sleeve assembly according to at least one embodiment of the present disclosure;

[0022] FIG3 is a schematic structural diagram of an angle connection assembly according to at least one embodiment of the present disclosure;

[0023] FIG4 is a schematic structural diagram of a jaw assembly in a straight-hitting state according to at least one embodiment of the present disclosure;

[0024] 5 is a schematic structural diagram of at least one embodiment of the present disclosure showing a jaw assembly rotated at a certain angle relative to a sleeve assembly;

[0025] FIG6 is a schematic structural diagram of a sliding member according to at least one embodiment of the present disclosure;

[0026] FIG7 is a schematic structural diagram of a first angle connector, a second angle connector, and a sliding member according to at least one embodiment of the present disclosure;

[0027] 8 is a schematic structural diagram of a first angle connecting member, a second angle connecting member, and a sliding member of an angle steering member according to at least one embodiment of the present disclosure;

[0028] FIG9 is a schematic structural diagram of the jaw assembly in a straight-hitting state according to at least one embodiment of the present disclosure;

[0029] 10 is a schematic structural diagram of at least one embodiment of the present disclosure showing a maximum rotation angle of the jaw assembly relative to the sleeve assembly;

[0030] FIG11 is a schematic structural diagram of a sliding member and a second limiting portion according to at least one embodiment of the present disclosure;

[0031] FIG12 is a schematic structural diagram of a tool holder and a first position-limiting portion according to at least one embodiment of the present disclosure;

[0032] FIG13 is a schematic structural diagram of the first limiting portion and the second limiting portion when the jaw assembly according to at least one embodiment of the present disclosure is in a straight-hitting state;

[0033] FIG14 is a schematic structural diagram of the exposed section of the jaw assembly of at least one embodiment of the present disclosure when the jaw assembly is in a straight-hitting state;

[0034] FIG15 is a schematic structural diagram of an exposed section of the jaw assembly of at least one embodiment of the present disclosure when the jaw assembly is in a bent state;

[0035] FIG16 is a schematic structural diagram of the exposed section when the jaw assembly according to at least one embodiment of the present disclosure is rotated to a maximum angle relative to the sleeve assembly;

[0036] FIG17 is a schematic structural diagram of a steering drive structure according to at least one embodiment of the present disclosure;

[0037] FIG18 is a schematic structural diagram of the lever assembly when the outer sleeve is in the proximal position according to at least one embodiment of the present disclosure;

[0038] FIG19 is a schematic structural diagram of the lever assembly when the outer sleeve is in the distal position according to at least one embodiment of the present disclosure;

[0039] FIG20 is a schematic structural diagram of a locking member in an unlocked state according to at least one embodiment of the present disclosure;

[0040] FIG21 is a schematic structural diagram of a locking member in a locked state according to at least one embodiment of the present disclosure;

[0041] FIG22 is a schematic structural diagram of an angle steering member according to at least one embodiment of the present disclosure;

[0042] FIG23 is a top view of an angle steering member according to at least one embodiment of the present disclosure;

[0043] FIG24 is a schematic structural diagram of the lever member when the outer sleeve is in the proximal position according to at least one embodiment of the present disclosure;

[0044] FIG25 is a schematic structural diagram of the lever member when the outer sleeve is in the distal position according to at least one embodiment of the present disclosure;

[0045] FIG26 is an exploded schematic diagram of a motion conversion structure according to at least one embodiment of the present disclosure;

[0046] FIG27 is a cross-sectional view of a motion conversion structure according to at least one embodiment of the present disclosure;

[0047] FIG28 is a schematic structural diagram of the lever member when the outer sleeve according to another embodiment of at least one embodiment of the present disclosure is in a proximal position;

[0048] FIG29 is a schematic structural diagram of the lever member when the outer sleeve according to another embodiment of at least one embodiment of the present disclosure is in the distal position;

[0049] FIG30 is a schematic structural diagram of an unlocking assembly according to at least one embodiment of the present disclosure, wherein the connecting rod assembly is located in the second position;

[0050] FIG31 is a schematic structural diagram of an unlocking assembly according to at least one embodiment of the present disclosure, wherein the connecting rod assembly is located in a first position; and

[0051] FIG32 is an exploded view of the inner sleeve, the angle connection assembly, and the sliding member according to at least one embodiment of the present disclosure.

[0052] Reference numerals: 100, jaw assembly; 130, locking member; 140, first angle connecting member; 150, second angle connecting member; 141, first receiving groove; 151, second receiving groove; 152, hinge portion; 210, angle turning member; 211, wall portion; 2111, groove; 212, matching portion; 213, turning hole; 214, outer peripheral surface; 215, middle arc surface; 216, first side surface; 217, second side surface; 218, left supporting portion; 219, right supporting portion; 300, sliding member; 310, third receiving groove; 320, second limiting portion; 321, second limiting groove; 330, slider; 340, connecting portion; 400, sleeve assembly; 410, inner sleeve; 411, ejector seat; 4111, slide groove; 412, sliding groove; 413, tool holder; 4131, matching groove; 414, straight portion receiving groove; 415, first limiting portion; 416, first limiting groove; 417, tool holder receiving groove; 420, outer sleeve; 421, first driving portion; 422, second driving portion; 423, first moving groove; 430, spring; 440, push block; 500, motion conversion structure; 511, lever member; 512, rotating portion; 513, first connecting portion; 5131, first end rod; 514, second connecting portion; 5141, second end rod; 5142, waist-shaped groove; 600, frame; 610, connecting rod assembly; 611, first connecting rod; 612, second connecting rod; 700, steering drive assembly; 710, steering knob; 720, steering drive member; 730, fixing part; 740, gear assembly; 741, left gear part; 742, right gear part; 750, push rod assembly; 751, left push rod; 752, right push rod; 760, transmission member; 800, operating assembly; 810, handle; 811, supporting part; 900, cutting knife assembly; 910, knife head; 920, knife rod; 921, exposed section; 9211, first part; 9212, second part; 1010, release button; 1011, drive rod; 1020, unlocking rod; O, first axis; P, second axis. DETAILED DESCRIPTION

[0053] 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.

[0054] It should be understood that the terms "proximal" (also referred to as the proximal end, the proximal end) and "distal" (also referred to as the distal end, the distal end) 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.

[0055] 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.

[0056] A surgical instrument includes a jaw assembly, a cannula assembly, a cutting blade assembly, and an operating assembly. The jaw assembly and the cannula assembly are rotatably connected, and an angle connector is provided at the rotating connection. When the jaw assembly is used for surgery, medical personnel operate the operating assembly to rotate the jaw assembly to an appropriate angle, which causes the blade rod of the cutting blade assembly to bend. The angle connector receives and limits the blade rod to prevent local curling of the blade rod. In surgical instruments with large turning angles, the angle connector includes at least two rotatably connected angle connectors. The relative rotation of the two angle connectors allows the jaw assembly to rotate at a larger angle. Each angle connector has a receiving slot. The blade rod extends from the straight portion receiving slot and passes through the receiving slot of each angle connector. When the jaw assembly rotates relative to the cannula assembly, it drives the rotation of each angle connector. The relative rotation of the angle connectors may cause lateral movement, causing the receiving slot of the angle connector to be offset from the straight portion receiving slot, causing the blade rod to bend significantly.

[0057] At least one embodiment of the present disclosure provides a surgical instrument, which can be a stapler, as shown in Figures 1 to 3. The surgical instrument includes a jaw assembly 100, a sleeve assembly 400, an angle steering member 210, an angle connecting assembly and a cutting knife assembly 900. When the surgical instrument is working, part of it extends into the human body. The medical staff controls the rotation of the jaw assembly 100, controls the jaw assembly 100 to close when the jaw assembly 100 rotates to a suitable position to clamp the human tissue, and then controls the cutting knife assembly 900 to fire to cut the human tissue. After the cutting is completed, the jaw assembly 100 is opened to release the tissue. After the jaw assembly 100 is rotated to the initial state, the surgical instrument is removed from the human body to complete the surgical operation.

[0058] The jaw assembly 100 is rotatably connected to the sleeve assembly 400 via the angle steering member 210, so that the jaw assembly 100 can rotate relative to the sleeve assembly 400. The cutting knife assembly 900 includes a cutter head 910 and a cutter rod 920. The cutter head 910 is arranged in the jaw assembly 100 and is used to cut tissue. The cutter rod 920 is connected to the cutter head 910 and is used to drive the cutter head 910 forward and / or backward. The cutter rod 920 extends along the direction of the sleeve assembly 400 and is driven to move relative to the sleeve assembly 400 to drive the cutter head 910 to move. When the jaw assembly 100 rotates, it swings relative to the sleeve assembly 400. The cutter rod 920 has a certain flexibility and swings with the jaw assembly 100. The angle connection assembly includes a first angle connection member 140 and a second angle connection member 150. The distal end of the first angle connection member 140 is rotatably connected to the angle deflection member 210, and the distal end of the second angle connection member 150 is connected to the proximal end of the first angle connection member 140. The angle connection assembly is disposed between the jaw assembly 100 and the sleeve assembly 400. When the jaw assembly 100 rotates relative to the sleeve assembly 400, the angle connection assembly is driven by the angle deflection member 210 to swing. The angle connection assembly includes at least two angle connections, and adjacent angle connections are relatively rotatable. In this embodiment, when the jaw assembly 100 rotates to the maximum angle relative to the sleeve assembly 400, the angle between the axis of the jaw assembly 100 and the axis of the sleeve assembly 400 is greater than or equal to 70°. In other embodiments, the angle connection assembly may include a third angle connection member, one end of the third angle connection member is rotatably connected to the first angle connection member 140, and the other end is rotatably connected to the second angle connection member 150. Of course, the number of angle connections can be greater, and the first angle connection member 140 and the second angle connection member 150 are two angle connections located at the head end and the tail end. The third angle connection member and more angle connections may be provided with a storage groove or may not be provided with a storage groove. In this embodiment, only the example of the angle connection assembly including the first angle connection member 140 and the second angle connection member 150, and the distal end of the second angle connection member 150 being rotatably connected to the proximal end of the first angle connection member 140 is used for illustration. The case of other numbers of angle connections and the case of other numbers of angle connections having storage grooves are not excluded. When there are a third angle connector and more angle connectors, the "connection" in "the distal end of the second angle connector 150 is rotatably connected to the proximal end of the first angle connector 140" is an indirect connection, and the third angle connector and more angle connectors are rotatably connected between the second angle connector and the first angle connector. If the third angle connector and more angle connectors have other receiving grooves for accommodating the tool rod, then "the tool rod is accommodated in the straight portion receiving groove, the second receiving groove and the first receiving groove from near to far" includes the situation where the other receiving grooves are located between the second receiving groove and the first receiving groove.

[0059] As shown in Figures 4 and 5, the sleeve assembly 400 has a straight portion receiving groove 414 defined along its axis, the first angle connector 140 has a first receiving groove 141 defined therein, and the second angle connector 150 has a second receiving groove 151 defined therein. The knife bar 920 passes through the straight portion receiving groove 414, the second receiving groove 151, and the first receiving groove 141 from proximal to distal. The portion of the knife bar 920 contained within the straight portion receiving groove 414 is laterally stopped by the straight portion receiving groove 414, allowing the portion of the knife bar 920 within the straight portion receiving groove 414 to extend along the axis of the sleeve assembly 400 without bending or curling. The jaw assembly 100 extends along the first axis O, and the axis of the sleeve assembly 400 is the second axis P. When the jaw assembly 100 is in the straight striking state, the first axis O and the second axis P are collinear, and the first angle connector 140 and the second angle connector 150 both extend in the direction of the second axis P, so that the knife rod 920 passes through the straight portion receiving groove 414, the second receiving groove 151, and the first receiving groove 141 along the second axis P, wherein the proximal opening of the second receiving groove 151 is aligned with the distal opening of the straight portion receiving groove 414, and alignment means that there is no misalignment in the lateral direction. The first receiving groove 141 and the second receiving groove 151 both limit the knife rod 920 to prevent the portion of the knife rod 920 in the first receiving groove 141 or the portion in the second receiving groove 151 from curling when the knife rod 920 moves forward or backward, resulting in poor transmission of the feed force. The limitation refers to the first receiving groove 141 limiting the knife rod 920 in the horizontal direction, restricting the portion of the knife rod 920 located within the first receiving groove 141 from moving along the length of the first receiving groove 141. The second receiving groove 151 also limits the knife rod 920 in the same manner. The horizontal direction refers to the direction along the X-axis.

[0060] When the jaw assembly 100 rotates relative to the sleeve assembly 400, the first axis O and the second axis P form a certain angle with each other, and the first angle connector 140 and the second angle connector 150 swing with the jaw assembly 100, driving the knife rod 920 to bend. The knife rod 920 is always partially received in the first receiving groove 141 and the second receiving groove 151, and the portion of the knife rod 920 in the first receiving groove 141 and the second receiving groove 151 will not be locally curled.

[0061] The proximal end of the angle steering member 210 is rotatably connected to the sleeve assembly 400, and the distal end is fixedly connected to the jaw assembly 100, so that the rotation of the angle steering member 210 can drive the jaw assembly 100 to rotate relative to the sleeve assembly 400. The first angle connecting member 140 is connected to the distal end of the angle steering member 210. When the angle steering member 210 rotates, it drives the first angle connecting member 140 to rotate, and the first angle connecting member 140 drives the second angle connecting member 150 to rotate. The distal end of the first angle connecting member 140 rotates along the X direction and the Y direction. The X and Y directions are displaced, and the X and Y directions are perpendicular to each other. The rotation of the first angle connecting member 140 will drive the second angle connecting member 150 to rotate, causing displacement in the X and Y directions. The rotation of the second angle connecting member 150 will cause the proximal end of the second receiving groove 151 to not be located on the second axis P. As shown in Figure 5, the proximal end of the second receiving groove 151 is staggered with the distal end of the straight receiving groove 414, so that the portion of the knife rod 920 located between the second receiving groove 151 and the straight receiving groove 414 will not bend significantly.

[0062] To address the aforementioned issues, in the embodiment of the present disclosure, the sleeve assembly 400 is provided with a sliding member 300. As shown in Figures 6 to 8, the sliding member 300 is slidably connected to the sleeve assembly 400 and rotatably connected to the proximal end of the second angle connector 150. The sliding member 300 can only slide along the axis (second axis P) of the sleeve assembly 400. Specifically, the second angle connector 150 has a hinge portion 152 and is rotatably connected to the sliding member 300 via the hinge portion 152. The hinge portion 152 is provided at the proximal end of the second angle connector 150.

[0063] As shown in Figures 9 and 10, in response to the rotation of the angle steering member 210, the angle connection assembly rotates, wherein the proximal end (hinge portion 152) of the second angle connection member 150 is rotatably connected to the sliding member 300 and can only slide in the direction of the second axis P, thereby driving the sliding member 300 to move along the direction of the second axis P. The proximal end of the second angle connection member 150 cannot move laterally, so that the proximal opening of the second receiving groove 151 is always aligned with the distal opening of the straight portion receiving groove 414. This prevents the proximal opening of the second receiving groove 151 from being laterally misaligned with the distal opening of the straight portion receiving groove 141 when the jaw assembly 100 rotates relative to the sleeve assembly 100. This prevents the knife bar 920 from undergoing additional bending, and the transmission of the cutting force during cutting is not affected, ensuring smooth cutting.

[0064] As shown in Figures 1, 6 and 12, 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 slide relative to the inner sleeve 410. The sliding member 300 is slidably connected to the inner sleeve 410. The inner sleeve 410 includes a tool holder 413 and an ejector seat 411 connected to the tool holder 413. The tool holder 413 and the ejector seat 411 are stacked in the Z direction. The Z direction is perpendicular to the X direction and the Y direction. The tool holder 413 A tool holder receiving groove 417 is provided, and the straight portion receiving groove 414 includes the tool holder receiving groove 417. The angle steering member 210 is rotatably connected to the ejector seat 411. Specifically, the distal end of the ejector seat 411 is rotatably connected to the proximal end of the angle steering member 210. One of the ejector seat 411 and the angle steering member 210 is provided with a steering hole 213, and the other is provided with a steering shaft. The steering shaft cooperates with the steering hole 213 so that the angle steering member 210 can rotate relative to the ejector seat 411. As shown in FIG6 , the first angle connector 140, the second angle connector 150, and the tool holder 413 are generally located at the same height in the Z direction, so that the bottoms of the first receiving groove 141, the second receiving groove 151, and the tool holder receiving groove 417 are located at the same height, and the tool rod 920 can pass through the straight receiving groove 417, the second receiving groove 151, and the first receiving groove 141. The height of the ejector seat 411 in the Z direction is lower than that of the tool holder 413, the first angle connector 140, and the second angle connector 150. In one embodiment, the sliding member 300 is slidably connected to the ejector seat 411. The ejector seat 411 is provided with a sliding groove 4111 along the second axis P. The sliding member 300 includes a slider 330. The slider 330 is movably received in the sliding groove 4111, so that the sliding member 300 is slidably connected to the sliding groove 4111 and can slide along the second axis P.

[0065] As shown in Figure 6, the sliding member 300 is arranged between the second angle connecting member 150 and the tool holder 413. The sliding member 300 is provided with a third receiving groove 310. The third receiving groove 310 extends along the second axis P. The straight portion receiving groove 414 also includes a third receiving groove 310. The bottom of the third receiving groove 310 and the bottom of the tool holder receiving groove 417 are at the same height. The tool rod 920 is connected to the tool head 910 through the tool holder receiving groove 417, the third receiving groove 310, the second receiving groove 151 and the first receiving groove 141.

[0066] As shown in Figures 6, 9, and 10, when the jaw assembly 100 rotates relative to the sleeve assembly 400, the proximal opening of the second receiving slot 151 is aligned with the distal opening of the straight portion receiving slot 414. Specifically, the proximal opening of the second receiving slot 151 is aligned with the distal opening of the third receiving slot 310, so that when the jaw assembly 100 rotates relative to the sleeve assembly 400, the proximal opening of the second receiving slot 151 and the distal opening of the third receiving slot 310 will not be offset in the horizontal direction, resulting in the knife bar 920 not being significantly bent between the second receiving slot 151 and the third receiving slot 310. The jaw assembly 100 has a straight striking state and a bent striking state. When the jaw assembly 100 is in the straight striking state, the length direction of the jaw assembly 100 is collinear with the axis of the sleeve assembly 400; when the jaw assembly 100 is in the bent striking state, the length direction of the jaw assembly 100 and the axis of the sleeve assembly 400 form a certain angle with each other; when the jaw assembly 100 is in the straight striking state, as shown in Figure 9, the sliding member 300 and the tool holder 413 are separated from each other and at a certain distance, providing space for the second angle connecting member 150 to drive the sliding member 300 to move toward the proximal end. The above-mentioned certain distance separates the tool holder receiving groove 417 from the third receiving groove 310, and the knife rod 920 forms an exposed section 921 between the tool holder receiving groove 417 and the third receiving groove 310. When the jaw assembly 100 rotates relative to the cannula assembly 400 in the bending and striking position, the slider 300 moves proximally, reducing the distance between the slider 300 and the blade holder 413 and the length of the exposed segment 921. Because the exposed segment 921 is not restrained, it may curl as the blade rod 920 advances, affecting smooth blade feed, especially in the straight striking position.

[0067] The surgical instrument further includes a stopper assembly, which is provided on the sleeve assembly 400 and the sliding member 300. When the jaw assembly 100 is in the straight or curved position, the stopper assembly stops the exposed segment 921 on both sides. Regardless of whether the jaw assembly 100 is in the straight or curved position, the stopper assembly stops the exposed segment 921, preventing it from curling during cutting.

[0068] As shown in Figures 11 to 12, the limiting assembly includes a first limiting portion 415 provided on the sleeve assembly 400 and a second limiting portion 320 provided on the sliding member 300. The first limiting portion 415 is provided with a first limiting groove 416, and the second limiting portion 320 is provided with a second limiting groove 321. Combined with Figure 10, the first limiting groove 416 and the second limiting groove 321 are both provided along the second axis P.

[0069] The first limiting groove 416 and the second limiting groove 321 both limit the exposed section 921 in the lateral direction, including the following situations.

[0070] As shown in Figures 11 to 15, when the jaw assembly 100 is in the straight-engaging state, a portion of the exposed section 921 is laterally limited and stopped by the first limiting groove 416, and another portion is laterally limited and stopped by the second limiting groove 321. The entire exposed section 921 is laterally limited and stopped by the first limiting groove 416 and the second limiting groove 321, thereby limiting the exposed section 921. Limiting here refers to limiting the extension and movement of the exposed section 921 along the direction of the second axis P, preventing curling and bending. When the jaw assembly 100 is in the straight-engaging state, the exposed section 921 includes a first portion 9211 and a second portion 9212. A portion of the first portion 9211 is located within the first limiting groove 416 and is laterally limited and stopped by the first limiting groove 416. The first limiting groove 416 limits the first portion 9211. Part of the second portion 9212 is located in the second limiting groove 321 and is stopped in the lateral direction by the second limiting groove 321. The second limiting groove 321 stops the second portion 9212, thereby limiting the entire exposed section 921 in the lateral direction.

[0071] In one embodiment, when the jaw assembly 100 is in the straight-hitting state, a portion of the exposed section 921 is stopped by both the first limiting groove 416 and the second limiting groove 321 .

[0072] As shown in Figures 15 and 16, in response to the rotation of the angle steering member 210, the jaw assembly 100 switches to the turning state, and the angle connecting assembly pushes the sliding member 300 to slide proximally. When the jaw assembly 100 rotates to the maximum angle relative to the sleeve assembly 400, the exposed section 921 is jointly limited and stopped in the transverse direction by the first limiting groove 416 and the second limiting groove 321 to achieve the limitation of the exposed section 921.

[0073] Furthermore, the first limiting portion 415 and the second limiting portion 320 are staggered in the height direction of the knife rod 920. When the sliding member 300 drives the second limiting portion 320 to move toward the proximal end, the first limiting portion 415 and the second limiting portion 320 are arranged one above and one below and staggered with each other, and no interference occurs.

[0074] In this embodiment, the second limiting portion 320 is located above the first limiting portion 415 as an example for illustration. In other embodiments, the first limiting portion 415 can also be located above the second limiting portion 320. As shown in Figures 13 to 16, when the jaw assembly 100 is in the straight-hitting state, the lower portion of the second portion 9212 of the exposed section 921 is located in the second limiting groove 321, and the upper portion of the first portion 9211 is located in the first limiting groove 416, so that the limiting assembly can limit the exposed section 921. When the jaw assembly 100 rotates to the maximum angle relative to the sleeve assembly 400, as shown in Figure 15, the entire exposed section 921 is simultaneously located in the first limiting groove 416 and the second limiting groove 321.

[0075] As shown in Figures 9 to 12, a matching groove 4131 is formed on the tool holder 413, and the matching groove 4131 is formed by an upward extension of the first limiting portion 415. When the jaw assembly 100 is in the straight hitting state, the second limiting portion 320 is partially located in the matching groove 4131. When the jaw assembly 100 is rotated to the maximum angle relative to the sleeve assembly 400, the second limiting portion 320 is displaced proximally to be completely embedded in the matching groove 4131. The setting of the matching groove 4131 further enhances the sliding stability of the sliding member 300 and enables the first limiting portion 415 and the second limiting portion 320 to be better combined.

[0076] In another embodiment, as shown in Figure 16, when the jaw assembly 100 is in the straight hitting state, the limiting assembly includes a first limiting portion 415 and a second limiting portion 320. The first limiting portion 415 is provided on the sleeve assembly 400, specifically the tool holder 413, and the second limiting portion 320 is provided on the sliding member 300. The first limiting portion 415 and the second limiting portion 320 are respectively located on both sides of the exposed section 921. When the jaw assembly 100 is in the straight hitting state or the bent hitting state, the exposed section 921 is at least partially stopped by the first limiting portion 415 and the second limiting portion 320 to achieve the limitation of the exposed section 921.

[0077] The first limiting portion 415 and the second limiting portion 320 are respectively located on both sides of the exposed section 921 in the thickness direction. When the jaw assembly 100 is in the straight hitting state, the first limiting portion 415 and the second limiting portion 320 are partially overlapped in the thickness direction of the exposed section 921, so that part of the exposed section 921 is simultaneously limited and stopped by the first limiting portion 415 and the second limiting portion 320. When the jaw assembly 100 rotates relative to the sleeve assembly 400 and is in the bent hitting state, the overlapping part of the first limiting portion 415 and the second limiting portion 320 in the thickness direction of the exposed section 921 increases, so that the part of the exposed section 921 that is simultaneously limited and stopped by the first limiting portion 415 and the second limiting portion 320 increases. Optionally, when the jaw assembly 100 is rotated to the maximum angle relative to the sleeve assembly 400, the first limiting portion 415 and the second limiting portion 320 are completely overlapped in the thickness direction of the exposed section 921, so that the entire exposed section 921 is simultaneously limited and stopped by the first limiting portion 415 and the second limiting portion 320.

[0078] Furthermore, as shown in Figures 1 and 17, the surgical instrument further includes a steering drive structure 700. The operating assembly 800 includes a frame 600. The steering drive structure 700 is disposed on the frame 600. A medical professional operates the steering drive structure 700 to rotate the jaw assembly 100. The steering drive structure 700 includes an operating handle 710 and a transmission assembly. The transmission assembly includes a first transmission member 760, a second transmission member, and a push rod assembly 750. The first transmission member 760 is connected to the second transmission member, and the second transmission member is connected to the angle steering member 210 via the push rod assembly 750. The operating handle 710 is slidably connected to the first transmission member 760. When the operating handle 710 is moved, it slides relative to the first transmission member 760 to switch from a locked position to an unlocked position. In response to rotation of the operating handle 710, the first transmission member 760 is driven to rotate by the operating handle 710, which drives the push rod assembly 750 to move via the second transmission member. The operating handle 710 can slide relative to the first transmission member 760 and can drive the first transmission member 760 to rotate. The second transmission member converts the torque applied by the medical staff to the operating handle 710 into a force that drives the push rod assembly 750 to move linearly.

[0079] Specifically, the second transmission member includes a gear assembly 740, a first transmission member 760 meshes with the gear assembly 740, and the gear assembly 740 meshes with the push rod assembly 750. In response to the rotation of the operating handle 710, the first transmission member 760 drives the gear assembly 740 to rotate, and the gear assembly 740 drives the push rod assembly 750 to move, thereby driving the angle steering member 210 to rotate. In this embodiment, the push rod assembly 750 includes a left push rod 751 and a right push rod 752, and the left push rod 751 and the right push rod 752 are respectively connected to the two sides of the angle steering member 210. The gear assembly 740 includes a left gear portion 741 and a right gear portion 742, and the left gear portion 741 and the right gear portion 742 are both rotatably connected to the frame 600 and are respectively provided on both sides of the first transmission member 760. The left gear unit 741 and the right gear unit 742 each include two coaxially arranged upper and lower gears. The left push rod 751 meshes with the lower gear of the left gear unit 741, and the right push rod 752 meshes with the lower gear of the right gear unit 742. The first transmission member 760 meshes with both the upper gears of the left gear unit 741 and the upper gears of the right gear unit 742. When a medical professional rotates the operating handle 710, the first transmission member 760 drives the left and right gear units 741, 742 to rotate, causing the left and right gear units 741, 742 to rotate in opposite directions, thereby causing the left and right push rods 751, 752 to move in opposite directions. 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 connected to the angle steering member 210. Specifically, as shown in Figure 2, the angle steering member 210 includes a left abutting portion 218 and a right abutting portion 219. The left push rod 751 abuts against the left abutting portion 218, and the right push rod 752 abuts against the right abutting 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 when the operating handle 710 is rotated 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 abutting portion 218 of the angle steering member 210 to move distally, causing the angle steering member 210 to rotate to the right, and the right abutting portion 219 is driven to move proximally, always abutting against the right push rod 752. Rotate the steering knob 710 counterclockwise to move the left push rod 751 toward the proximal end, and similarly, the right push rod 752 moves toward the distal end. 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.

[0080] The operating assembly 800 further includes a handle 810. After the steering is completed, the medical staff actuates the handle 810 to move the outer sleeve 420 from the distal position to the proximal position, thereby closing the jaw assembly 100. Actuating the handle 810 to move the outer sleeve 420 from the distal position to the proximal position is achieved by the following structure:

[0081] As shown in Figures 18 and 19, the frame 600 is provided with a link assembly 610, which 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, and 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. When actuated, the handle 810 can engage with the link assembly 610 and drive the link assembly 610 to move. 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 collinear or substantially collinear, 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 action of the connecting rod assembly 610, the outer sleeve 420 remains in the distal position.

[0082] Collinearity means that the first link 611 and the second link 612 are located on the same straight line, with an angle of 180° between them. Substantially collinearity means that the first link 611 and the second link 612 are past their dead center positions, and the angle between them is greater than 0° and less than 5°. When the link assembly 610 is at its dead center (corresponding to collinearity) or substantially at its dead center (corresponding to substantially collinearity), the pressure angle between the first link 611 and the second link 612 is substantially 90°. When an external force is applied to either the first link 611 or the second link 612, the torque exerted on the other link is zero, preventing the link assembly 610 from moving and causing it to self-lock in the second position. This locks the jaw assembly 100 in the closed position.

[0083] 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 810). Since the proximal end of the second connecting rod 612 is connected to the frame 600, the hinge point at the distal end of the second connecting rod 612 moves distally. 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 distally, so that the outer sleeve 420 is located at the distal position.

[0084] The handle 810 is provided with a supporting portion 811 located on the underside of the connecting rod assembly 610. When the connecting rod assembly 610 switches from the first position to the second position, the handle 810 supports the first connecting rod 611 or the second connecting rod 612 via the supporting portion 811, thereby operatively engaging 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 811 separates from the connecting rod assembly 610 when the handle 810 returns to its original position and rebounds. When the handle 810 is subsequently actuated, the handle 810 switches from the initial position to the pressing position, and the supporting portion 811 moves with the movement of the handle 810. The supporting portion 811 contacts the connecting rod assembly 610 in the second position only when the handle 810 reaches the pressing position (the end point of the movement trajectory of the supporting portion 811). That is, the supporting portion 811 does not contact the connecting rod assembly 610 during the movement, and thus the handle 810 cannot drive the connecting rod assembly 610 during subsequent actuation. Specifically, the supporting portion 811 is a rod body, and the handle 810 is operably engaged with the connecting rod assembly 610 by supporting the second connecting rod 612 through the supporting portion 811. During the rotation of the second connecting rod 612, the supporting portion 811 can always support the second connecting rod 612.

[0085] The outer sleeve 420 is located at the distal end position, and the connecting rod assembly 610 is self-locked in the second position, locking the outer sleeve 420 at the distal end position.

[0086] The surgical instrument further includes a jaw locking structure, which includes a locking member 130. The outer sleeve 420 is connected to the locking member 130. The locking member 130 has a locked state and an unlocked state. In the locked state, the locking member 130 is locked with the angle steering member 210 to prevent the jaw assembly 100 from rotating relative to the sleeve assembly 400. In the unlocked state, the locking member 130 is unlocked from the angle steering member 210, and the jaw assembly 100 rotates relative to the sleeve assembly 400 in response to rotation of the operating handle 710. The outer sleeve 420 is movable along the axis of the sleeve assembly 400. When the outer sleeve 420 is in the proximal position, the jaw assembly 100 is in the open state and the locking member 130 is in the unlocked state. When the outer sleeve 420 moves from the proximal position to the distal position, the jaw assembly 100 is driven to switch from the open state to the closed state, and the locking member 130 is driven to move so that the locking member 130 switches to the locked state. That is, when the jaw assembly 100 is switched to the closed state, the jaw assembly 100 is locked and cannot rotate.

[0087] The outer sleeve 420 moves from the distal position to the proximal position so that the locking member 130 locks the angle turning member 210 in the following manner:

[0088] As shown in Figures 22 and 23, the angle steering member 210 has an outer peripheral surface 214. The outer peripheral surface 214 is arranged on the periphery of the angle steering member 210 around the rotation axis of the angle steering member 210. Specifically, the outer peripheral surface 214 includes a central arcuate surface 215, a first side surface 216, and a second side surface 217. The first side surface 216 and the second side surface 217 are respectively located on either side of the central arcuate surface 215. The angle steering member 210 also includes a mating portion 212 and a wall portion 211. The wall portion 211 has a certain thickness. The mating portion 212 is disposed 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 mating portion 212 from the outer peripheral surface 214.

[0089] In one embodiment, as shown in Figures 20 to 27, the jaw locking structure further includes a motion conversion structure 500. The motion conversion structure 500 includes a lever member 511, a rotating portion 512, a first connecting portion 513, and a second connecting portion 514. The lever member 511 is connected to the rotating portion 512 and is rotatably connected to the frame 600 through the rotating portion 512. The first connecting portion 513 and the second connecting portion 514 are respectively located on either side of the rotating portion 512. The first connecting portion 513 is connected to the outer sleeve 420, and the second connecting portion 514 is connected to the locking member 130. The movement of the outer sleeve 420 drives the first connecting portion 513 to move, thereby driving the lever member 511 to rotate. When the lever member 511 rotates, the movement of the second connecting portion 514 drives the locking member 130 to move. The movement direction of the first connecting portion 513 is opposite to the movement direction of the second connecting portion 514. In response to the movement of the outer sleeve 420 in the first direction, the locking member 130 moves in the second direction. The first direction is opposite to the second direction, and both the first direction and the second direction are parallel to or collinear with the axis of the sleeve assembly 400. As shown in Figures 24 and 25, when the outer sleeve 420 moves proximally, the first connecting portion 513 rotates clockwise and the second connecting portion 514 rotates counterclockwise, driving the locking member 130 to move distally. When the outer sleeve 420 moves distally, the first connecting portion 513 rotates counterclockwise and the second connecting portion 514 rotates clockwise, driving the locking member 130 to move proximally.

[0090] For example, the distance between the second connecting portion 514 and the rotating portion 512 is smaller than the distance between the first connecting portion 513 and the rotating portion 512. In the lever structure, the distance between the first connecting portion 513 and the rotating portion 512 is the power arm, and the distance between the second connecting portion 514 and the rotating portion 512 is the resistance arm. When the outer sleeve 420 drives the lever member 511 to rotate and drives the locking member 130 to move, the power arm is longer and the resistance arm is shorter. The lever structure is a force-saving lever, making it easier for the outer sleeve 420 to drive the locking member 130 to move. At the same time, when the locking member 130 is in the locked position, the outer sleeve 420 is locked at the distal position by the operating assembly 800. The locking force applied to the outer sleeve 420 provides a greater locking force to the locking member 130 through the lever member 511, so that the locking member 130 is better maintained in the locked position.

[0091] In this embodiment, two lever members 511 are formed, and the rotation axes of the two lever members 511 are coaxially arranged. The first connecting portions 513 of the two lever members 511 are connected by a first end rod 5131, and the second connecting portions 514 of the two lever members 511 are connected by a 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, forming a frame as a whole. When the lever members 511 rotate, the two lever members 511 rotate synchronously, improving 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 connecting portions 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 130, so that the second connecting portions 514 of the two lever members 511 are connected to the locking member 130. Of course, in other embodiments, the lever member 511 may be provided with only one, the first connecting portion 513 of the lever member 511 is provided with a connecting structure connected to the outer sleeve 420, which may be a rod body or a hole, and the second connecting portion 514 of the lever member 511 is provided with a connecting structure connected to the locking member 130, which may be a rod body or a hole, etc., which is not specifically limited in this embodiment.

[0092] The outer sleeve 420 moves along the axis of the sleeve assembly 400, with a linear motion path. However, when the lever member 511 rotates, its first connection portion 513 rotates around the rotating portion 512, with an arcuate motion path. The linearly moving outer sleeve 420 is connected to the first connection portion 513 that moves along the arc. Because the motion path of the outer sleeve 420 differs from the motion path of the first connection portion 513 of the lever member 511, the first connection portion 513 is prone to getting stuck during motion. To address this issue, in this embodiment, the outer sleeve 420 and the first connection portion 513 are movably connected via a guide structure. When the outer sleeve 420 moves along a first direction, the guide structure drives the first connection portion 513 to rotate around the rotating portion 512 of the lever member 511. The first direction is parallel to or collinear with the axis of the sleeve assembly 400.

[0093] 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 in the X direction, pushing the lever member 511 to rotate, so that the first connecting portion 513 rotates. The rotation of the first connecting portion 513 produces displacement in both the X direction and the Y direction. In the X direction, the first connecting portion 513 moves with the outer sleeve 420. In the Y direction, the first connecting portion 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 connecting portion 513 can rotate smoothly while maintaining connection with the outer sleeve 420, avoiding the occurrence of rotation jamming.

[0094] When the lever member 511 is driven to rotate, the movement path of the second connecting portion 514 is arc-shaped. The second connecting portion 514 connects to and drives the locking member 130 to move only in the X direction. In order to enable the second connecting portion 514 to drive the locking member 130 to move only in the X direction, the second connecting portion 514 and the locking member 130 are movably connected via a guide structure. When the second connecting portion 514 rotates around the rotating portion 512, it is displaced in both the X and Y directions. In the X direction, the locking member 130 moves with the second connecting portion 514. In the Y direction, the locking member 130 moves relative to the second connecting portion 514 via the guide structure, so that the second connecting portion 514 is always connected to the locking member 130, and the second connecting portion 514 drives the locking member 130 to move via the guide structure.

[0095] The guide structure includes a motion rod and a motion groove 320. One of the outer sleeve 420 and the first connecting part 513 is provided with a motion rod, and the other has a motion groove 320. The motion rod is located in the first motion 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. The motion rod slides along the length direction of the motion groove 320 (i.e., the 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.

[0096] In the guiding structure in which the first connecting part 513 is connected to the outer sleeve 420, the moving rod is connected to the first connecting part 513, specifically the first end rod 5131. 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 roughly along the Y direction. A moving groove 320 is formed between the first driving part 421 and the second driving part 422. The moving groove 320 extends roughly along the Y direction. The first end rod 5131 is located in the moving groove 320 and can move in the moving groove 320 along the length direction of the moving groove 320 (roughly the Y direction).

[0097] In the guide structure connecting the second connecting portion 514 to the locking member 130, the movable rod is the second end rod 5141, which is connected to the locking member 130. The proximal end of the locking member 130 defines a slot through which the locking member 130 engages with the second end rod 5141, allowing the second end rod 5141 to drive the locking member 130 toward the proximal or distal end. The inner sleeve 410 defines a sliding slot 412, within which the second end rod 5141 is disposed. Within the sliding slot 412, the second end rod 5141 can only move in the X-direction. The movable slot 320 is defined on the lever member 511, specifically a waist-shaped slot 5142. The ends of the second end rod 5141 are respectively positioned within the waist-shaped slots 5142 of the two lever members 511, with the waist-shaped slots 5142 extending along the Y-direction. When the lever member 511 rotates, the ends of the second end rod 5141 are respectively positioned within the waist-shaped slots 5142 of the two lever members 511 and slide along the length of the waist-shaped slots 5142 (displacing in the Y-direction), allowing the second connecting portion 514 to only drive the locking member 130 to move in the X-direction. In an embodiment where the transmission structure has only one lever member 511, the lever member 511 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 130, while the other end is positioned within the movable slot 320.

[0098] In another embodiment, as shown in Figures 28 and 29, the mating portion 212 is arranged on the distal side of the angle steering member 210, and the first connecting portion 513 and the second connecting portion 514 are both arranged on one side of the rotating portion 512. When the outer sleeve 420 switches from the proximal position to the proximal position, the locking member 130 is driven to move distally through the lever member 511 to cooperate with the mating portion 212 to lock the angle steering member 210.

[0099] In another embodiment, the motion conversion mechanism 500 includes a gear and two racks (not shown). The gear is rotatably mounted on the frame 600. The two racks are a first rack and a second rack, respectively. The first rack and the second rack are disposed on either side of the gear and mesh with the gear. When the gear rotates, the two racks move in opposite directions. The first rack is connected to the outer sleeve 420, and the second rack is connected to the locking member 130. The outer sleeve 420 drives the lever member 511 to move the first rack in a first direction, thereby driving the gear to rotate, which in turn drives the second rack to move in a second direction, the first direction being opposite to the second direction. When the outer sleeve 420 moves distally, it drives the first rack distally, causing the gear to rotate, thereby driving the second rack and the locking member 130 proximally. When the outer sleeve 420 moves proximally, it drives the first rack proximally, causing the gear to rotate, thereby driving the second rack and the locking member 130 distally.

[0100] After the jaw assembly 100 is closed and the angle steering member 210 is locked, the cutting knife assembly moves distally to advance, cut the tissue and trigger the suturing assembly. After the advancement is completed, the cutting knife assembly moves proximally to retract. 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 810 and the position of the cutting knife assembly to achieve the advancement and retraction of the cutting knife assembly.

[0101] After the knife is retracted, the medical staff opens the jaw assembly 100. The surgical instrument also includes an unlocking assembly, as shown in Figures 30 and 31. The unlocking assembly includes a release button 910 provided outside the housing of the operating assembly 800, and an unlocking rod 920 located inside the housing of the operating assembly 800 and abutting against the connecting rod assembly 610 located in the second position. The unlocking rod 920 is linked to the release button 910. The release button 910 has a driving rod 911. When the medical staff operates the release button 910, specifically when the release button 910 is pushed, the release button 910 and the driving rod 911 rotate synchronously. The rotating driving rod 911 acts on the release rod to rotate the unlocking rod 920. 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 100 opens to release 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 rotates, 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, thereby releasing the self-locking state of the connecting rod assembly 610. The outer sleeve 420 is equipped with a spring 430. One end of the spring 430 is connected to the frame 600, and the other end is connected to the push block 440. 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 toward the proximal end, and the connecting rod assembly 610 moves to the first position, causing the jaw assembly 100 to open and the outer sleeve 420 to move to the proximal position, thereby driving the locking member 130 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, then operates the push handle 710 to rotate the jaw assembly 100 to the straight-action position, and finally removes the jaw assembly 100 from the human body.

[0102] The embodiments of the present disclosure further provide a surgical instrument that is substantially the same as the above embodiments, with the main difference being the position and structure of the sliding member 300 .

[0103] As shown in FIG32 , the ejector seat 411 defines a slot 4111 along the axis of the sleeve assembly. The sliding member 300 is connected to the slot 4111. Specifically, the sliding member 300 includes a slider 330 and a connecting portion 340. The slider 330 is disposed within the slot 4111, and the connecting portion 340 is located between the ejector seat 411 and the tool holder 413. The hinge portion 152 is disposed at the proximal bottom of the second angle connector 150 and is rotatably connected to the sliding member 300. The sliding member 300 is entirely located below the tool holder 413, and the straight portion receiving groove 414 includes only the tool holder receiving groove 417.

[0104] When the jaw assembly 100 rotates relative to the sleeve assembly 400 from the straight-striking state, the first angle connector 140 and the second angle connector 150 rotate, causing the sliding member 300 to move proximally along the slide groove 4111 and the hinge portion 152 to move proximally along the second axis P, so that the proximal end of the second angle connector 150 is always located in the axial direction of the sleeve assembly 400, thereby aligning the proximal opening of the second receiving groove 151 with the distal opening of the straight portion receiving groove 414. The proximal opening of the second receiving groove 151 and the distal opening of the third receiving groove 310 will not be offset in the horizontal direction, resulting in the knife bar 920 not being significantly bent between the second receiving groove 151 and the third receiving groove 310. This does not affect the transmission of the cutting force during cutting, ensuring smooth cutting.

[0105] It should be understood that although the present disclosure is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the present disclosure is only for the sake of clarity. Those skilled in the art should regard the present disclosure 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.

[0106] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present disclosure. They are not intended to limit the scope of protection of the present disclosure. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A surgical instrument, comprising a jaw assembly, a sleeve assembly, an angle turning member, an angle connecting assembly, and a cutting knife assembly, wherein: The jaw assembly is rotatably connected to the sleeve assembly through the angle turning member; the cutting knife assembly includes a knife rod and a knife head connected to the distal end of the knife rod; The angle connection assembly comprises a first angle connection member and a second angle connection member, wherein the distal end of the first angle connection member is rotatably connected to the angle steering member, and the proximal end of the first angle connection member is rotatably connected to the distal end of the second angle connection member; The sleeve assembly is provided with a straight receiving groove along the axial direction, the first angle connecting member is provided with a first receiving groove, the second angle connecting member is provided with a second receiving groove, and the knife bar is accommodated in the straight receiving groove, the second receiving groove and the first receiving groove from near to far; the jaw assembly is configured such that when it is in a straight striking state, the length direction of the jaw assembly is in line with the axis of the sleeve assembly, and the proximal opening of the second receiving groove is aligned with the distal opening of the straight receiving groove; The surgical instrument further comprises a sliding member, which is slidably connected to the sleeve assembly along the axial direction of the sleeve assembly, and the proximal end of the second angle connecting member is rotatably connected to the sliding member; In response to the rotation of the angle steering member, the jaw assembly is configured to rotate relative to the sleeve assembly so that the jaw assembly is in a bent state, and the angle connection assembly is configured to rotate to push the sliding member to slide toward the proximal end along the axial direction of the sleeve assembly, so that the proximal opening of the second receiving groove remains aligned with the distal opening of the straight portion receiving groove.

2. The surgical instrument according to claim 1, wherein: The sleeve assembly includes a tool holder and an ejector seat connected to the tool holder, the straight portion receiving groove includes a tool holder receiving groove opened in the tool holder, and the angle turning member is rotatably connected to the ejector seat.

3. The surgical instrument according to claim 2, wherein: The sliding member is arranged between the second angle connecting member and the tool holder, the straight portion receiving groove also includes a third receiving groove opened in the sliding member, and the tool rod is accommodated in the tool holder receiving groove, the third receiving groove, the second receiving groove and the first receiving groove from near to far; when the jaw assembly is in a straight hitting state, the proximal opening of the second receiving groove is aligned with the distal opening of the third receiving groove; when the jaw assembly is in a bent hitting state, the proximal opening of the second receiving groove is kept aligned with the distal opening of the third receiving groove.

4. The surgical instrument according to claim 3, wherein: The tool bar includes an exposed section between the tool holder receiving slot and the third receiving slot; The surgical instrument also includes a limit assembly, which is arranged on the sleeve assembly and the sliding member. When the jaw assembly is in a straight state or a bent state, the limit assembly provides a lateral limit stop for the exposed section on both sides of the exposed section.

5. The surgical instrument according to claim 4, wherein: The limiting assembly includes a first limiting portion arranged on the sleeve assembly and a second limiting portion arranged on the sliding member, the first limiting portion is provided with a first limiting groove, and the second limiting portion is provided with a second limiting groove; the first limiting groove and the second limiting groove both limit the exposed section in the lateral direction.

6. The surgical instrument according to claim 5, wherein: The first limiting portion and the second limiting portion are staggered in the height direction of the knife rod.

7. The surgical instrument according to claim 4, wherein: The limiting assembly comprises a first limiting portion provided on the sleeve assembly and a second limiting portion provided on the sliding member, wherein the first limiting portion is located on one side of the exposed section along the thickness direction thereof, and the second limiting portion is located on the other side of the exposed section along the thickness direction thereof; At least a portion of the exposed section is stopped in a lateral direction by both the first limiting portion and the second limiting portion.

8. The surgical instrument according to claim 2, wherein: The ejector seat is provided with a sliding groove along the axial direction of the sleeve assembly, and the sliding member includes a slider, which is slidably disposed in the sliding groove; when the jaw assembly is in a straight hitting state, the proximal opening of the second receiving groove is aligned with the distal opening of the tool holder receiving groove; when the jaw assembly is in a bent hitting state, the proximal opening of the second receiving groove is aligned with the distal opening of the tool holder receiving groove.

Images