Surgical instrument

Abstract

Provided is a surgical instrument. The surgical instrument comprises: a jaw assembly (100), a sleeve assembly (400), an angular steering member (210), and a locking member (300). The angular steering member (210) is rotatably connected to the sleeve assembly (400); the jaw assembly (100) is connected to the angular steering member (210); and in response to the rotation of the angular steering member (210), the jaw assembly (100) is configured to rotate relative to the sleeve assembly. The angular steering member (210) is provided with a wall portion (211) and a matching portion (212), and the matching portion (212) is arranged on the inner side of the wall portion (211). The locking member (300) has an unlocked state and a locked state; when in the unlocked state, the locking member (300) is separated from the matching portion (212), and the jaw assembly (100) is configured to rotate relative to the sleeve assembly (400) in response to the rotation of the angular steering member (210); and when in the locked state, the locking member (300) matches the matching portion (212) to prevent the jaw assembly (100) from rotating relative to the sleeve assembly (400). The surgical instrument can stably lock the jaw assembly and prevent the jaw assembly from rotating.

Description

surgical instruments

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to Chinese Patent Application No. 202310800904.1 filed on June 30, 2023, Chinese Patent Application No. 202310796810.1 filed on June 30, 2023, and Chinese Patent Application No. 202310800963.9 filed on June 30, 2023, and the contents of the above-mentioned Chinese patent applications are herein cited 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 sever tissue using a cutting blade and staple it together using titanium staples, similar to a stapler. Staplers are classified 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 severing and stapled the tissue.

[0005] Surgical instruments consist of a jaw assembly, a cutting blade assembly, and an operating assembly, which is connected to the jaw and cutting blade assemblies. During surgery, medical personnel manipulate the operating assembly to turn the jaw assembly to align with the tissue to be clamped. Once the jaw assembly is properly rotated, the medical personnel control the jaw assembly to close and clamp the tissue. During surgery, the jaw assembly needs to be locked to prevent it from moving and pulling on the tissue while clamping.

[0006] Summary of the Invention

[0007] Embodiments of the present disclosure provide a surgical instrument capable of stably locking a jaw assembly to prevent the jaw assembly from rotating.

[0008] An embodiment of the present disclosure provides a surgical instrument, comprising: a jaw assembly, a sleeve assembly, an angle steering member and a locking member, wherein the angle steering member is rotatably connected to the sleeve assembly, the jaw assembly is connected to the angle steering member, and in response to the rotation of the angle steering member, the jaw assembly is configured to rotate relative to the sleeve assembly; the angle steering member includes an outer peripheral surface; the angle steering member has a wall portion and a mating portion, the outer peripheral surface is arranged on the outside of the wall portion, and the mating portion is arranged on the inside of the wall portion; the locking member has an unlocked state and a locked state; when in the unlocked state, the locking member is separated from the mating portion, and the jaw assembly is configured to rotate relative to the sleeve assembly in response to the rotation of the angle steering member; when in the locked state, the locking member cooperates with the mating portion to prevent the jaw assembly from rotating relative to the sleeve assembly.

[0009] For example, the matching portion is arranged on the proximal side of the rotation axis of the angle steering member, and the locking member moves proximally from the unlocked position to the locked position to achieve switching from the unlocked state to the locked state.

[0010] For example, the surgical instrument also includes a motion conversion structure, wherein the sleeve assembly includes an outer sleeve, the outer sleeve is connected to the jaw assembly, and the outer sleeve is connected to the locking member through the motion conversion structure. When the outer sleeve is located at the proximal position, the jaw assembly is in an open state and the locking member is in the unlocked state; when the outer sleeve moves from the proximal position to the distal position, the outer sleeve drives the jaw assembly to switch from the open state to the closed state, and the outer sleeve drives the locking member to move proximally through the motion conversion structure to switch the locking member from the unlocked state to the locked state.

[0011] For example, the motion conversion structure includes a lever member, a rotating part, a first connecting part and a second connecting part. The lever member is connected to the rotating part and is rotatably connected to the frame through the rotating part. The first connecting part and the second connecting part are both connected to the lever member and are located on both sides of the rotating part. The outer sleeve is connected to the first connecting part, and the locking member is connected to the second connecting part. When the outer sleeve moves along the first direction to drive the first connecting part to move, the lever member rotates around the rotating part, so that the second connecting part drives the locking member to move along the second direction, and the second direction is opposite to the first direction.

[0012] For example, the motion conversion structure includes a gear, a first rack and a second rack, the first rack and the second rack are located on both sides of the gear and are both engaged with the gear, the first rack is connected to the outer sleeve, and the second rack is connected to the locking member, when the outer sleeve drives the first rack to move along the first direction, the gear rotates, driving the second rack and the locking member to move along the second direction, and the first direction is opposite to the second direction.

[0013] For example, the matching member is arranged on the distal side of the rotation axis of the angle steering member, and the locking member moves distally from the unlocking position to the locking position to achieve switching from the unlocking state to the locking state.

[0014] For example, the sleeve assembly includes an outer sleeve connected to the locking element. The outer sleeve moves distally to drive the locking element to move distally, so that the locking element switches from the unlocked state to the locked state.

[0015] For example, the surgical instrument also includes a frame and a transmission structure, and the outer sleeve is connected to the locking member through the transmission structure; the transmission structure includes a lever member, a rotating part, a first connecting part and a second connecting part, the lever member is connected to the rotating part and is rotatably connected to the frame through the rotating part, the first connecting part and the second connecting part are both connected to the lever member, and are both located on the same side of the rotating part; the outer sleeve is connected to the first connecting part, and the locking member is connected to the second connecting part; when the outer sleeve moves along the first direction to drive the first connecting part to move, the lever member rotates around the rotating part, so that the second connecting part drives the locking member to move along the first direction.

[0016] For example, the distance between the second connecting portion and the rotating portion is smaller than the distance between the first connecting portion and the rotating portion.

[0017] For example, the first connecting portion is movably connected to the outer sleeve via a guide structure. When the outer sleeve moves along the first direction, the first connecting portion is driven to rotate around the rotating portion by the guide structure.

[0018] For example, the second connecting portion is movably connected to the locking member via a guide structure, and when the second connecting portion rotates around the rotating portion, the locking member is driven to move along the first direction via the guide structure.

[0019] For example, the guide structure includes a motion rod and a motion slot, the motion rod is movably disposed in the motion slot, and the length direction of the motion slot is perpendicular or substantially perpendicular to the first direction.

[0020] For example, the first direction is the axial direction of the sleeve assembly.

[0021] For example, the jaw assembly has an open state and a closed state, and the sleeve assembly includes an outer sleeve, which is connected to the locking member, and when the outer sleeve moves toward the distal end, the jaw assembly switches from the open state to the closed state; when the jaw assembly is in the open state, the locking member is in the unlocked state, and when the jaw assembly is in the closed state, the locking member is in the locked state.

[0022] For example, the angle steering member has a plurality of the matching portions, and the plurality of the matching portions are arranged around the rotation axis of the angle steering member. When the locking member is in a locked state, the locking member matches with at least one of the matching portions.

[0023] For example, when the matching portions arranged at the head end and the tail end of each matching portion are engaged with the locking member, the angle between the extension line of the jaw assembly and the sleeve assembly is greater than or equal to 70°.

[0024] For example, one of the mating portion and the locking piece is provided with a locking tooth, and the other is provided with a mating groove, the locking tooth cooperates with the mating groove to lock the mating portion and the locking piece; the locking tooth is separated from the mating groove to unlock the mating portion and the locking piece.

[0025] For example, the surgical instrument further includes a steering drive assembly, which drives the angle steering member to rotate when operated to adjust the angle between the jaw assembly and the cannula assembly.

[0026] For example, the steering drive assembly includes: an operating handle, a gear assembly and a push rod, the operating handle is connected to the gear assembly, the push rod is provided with connecting teeth, and the connecting teeth are engaged with the gear assembly; when the operating handle is rotated, the gear assembly is driven to rotate, and in response to the rotation of the operating handle, the gear assembly is configured to rotate and drive the push rod to move, and the push rod is configured to drive the angle steering member to rotate when moving.

[0027] For example, the steering drive assembly also includes: a driving part, an elastic locking part and a fixing part, the handle is connected to and drives the gear assembly through the driving part, the fixing part has a locking tooth, the driving part has a mating tooth, the driving part is connected to the elastic locking part, when the driving part is in the locked position, the elastic locking part is in an initial state, the mating tooth is engaged with the locking tooth, preventing the driving part from rotating; when the driving part is in the unlocked position, the elastic locking part is in a compressed state, the mating tooth is separated from the locking tooth, and the driving part can rotate to drive the push rod to move through the gear assembly.

[0028] For example, the jaw assembly includes a nail magazine seat and a nail support seat rotatably connected to the nail magazine seat. The surgical instrument also includes a motion changing mechanism. The outer sleeve is connected to the nail support seat through the motion changing mechanism. The motion changing mechanism includes a first driving member and a first driving member provided on the outer sleeve, and a first driven part and a second driven part provided on the nail support seat. When the outer sleeve is in the proximal position, the first driving member is matched with the first driven part to make the jaw assembly in an open state; when the outer sleeve moves from the proximal position to the distal position, the first driving member is separated from the first driven part, and the first driving member is matched with the second driven part to make the nail support seat pivot, thereby making the jaw assembly in a closed state.

[0029] For example, the surgical instrument also includes a steering drive structure, which includes a handle assembly, a locking assembly, and a transmission assembly. The handle assembly is connected to the angle steering member through the transmission assembly. In response to the rotation of the handle assembly, the transmission assembly is configured to drive the angle steering member to rotate, thereby driving the jaw assembly to rotate relative to the sleeve assembly; the handle assembly has a locking position locked with the locking assembly and an unlocking position unlocked with the locking assembly; the handle assembly includes a locking portion, and the locking assembly includes a locking groove. When the handle assembly is in the unlocking position, the locking portion is separated from the locking groove; when the handle assembly is in the locking position, the locking portion is inserted into the locking groove; the locking groove is provided with a guide wall. When the handle assembly switches from the unlocking position to the locking position, the locking portion is inserted into the locking groove under the guidance of the guide wall.

[0030] For example, the locking groove includes two guide walls, and the two guide walls are arranged in a V shape; the locking portion includes two matching walls, and when the locking portion is inserted into the locking groove, the two matching walls are respectively fitted with the two guide walls.

[0031] For example, the locking assembly includes a fixing portion, the locking groove is opened in the fixing portion, there are multiple locking grooves, and the multiple locking grooves are arranged around the rotation axis of the handle assembly.

[0032] For example, the steering drive structure also includes multiple gear parts. When the handle assembly is in the locked position, the handle assembly is connected to one of the gear parts; when the handle assembly is in the unlocked position, in response to the rotation of the handle assembly, the handle assembly is configured to move from a position connected to one of the gear parts to a position connected to another of the gear parts, and the locking part is configured to move from a position corresponding to one of the locking grooves to a position corresponding to another of the locking grooves.

[0033] For example, the shift portion is a shift slot opened in the fixed portion, and the transmission assembly includes a shift protrusion and a first elastic member. The shift protrusion cooperates with the shift slot to connect the handle assembly with the shift portion. The first elastic member is connected to the shift protrusion and applies a radial force along the fixed portion to the first elastic member. In response to the rotation of the handle assembly, the shift protrusion is configured to disengage from one of the shift slots and enter an adjacent shift slot under the action of the first elastic member.

[0034] For example, the shift protrusion is a fixing bead, and the shift groove includes a guide wall, which guides the fixing bead to enter and exit the shift groove.

[0035] For example, the shift portion and the locking groove are arranged opposite to each other in the radial direction of the fixing portion.

[0036] For example, the transmission assembly includes a first transmission member, a second transmission member and a push rod assembly, the first transmission member is connected to the second transmission member, and the second transmission member is connected to the angle steering member through the push rod assembly; the handle assembly is movably connected to the first transmission member, and when the handle assembly is operated, it moves relative to the first transmission member to switch from the locked position to the unlocked position or from the unlocked position to the locked position; when the handle assembly is in the unlocked position, in response to the rotation of the handle assembly, the first transmission member is configured to drive the push rod assembly to move through the second transmission member, thereby driving the angle steering member to rotate.

[0037] For example, the second transmission member includes a gear assembly, the first transmission member is engaged with the gear assembly, and the gear assembly is engaged with the push rod assembly. In response to the rotation of the handle assembly, the first transmission member is configured to drive the gear assembly to rotate, thereby driving the push rod assembly to move toward the distal end or the proximal end.

[0038] For example, the handle assembly is movably connected to the transmission assembly, and when the handle assembly is operated, it moves relative to the transmission assembly to switch from the locked position to the unlocked position or from the unlocked position to the locked position; the locking assembly includes a second elastic member, one end of the second elastic member is connected to the transmission assembly, and the other end is connected to the handle assembly, and the second elastic member is arranged along the moving direction of the handle assembly, when the handle assembly is in the unlocked position, the second elastic member is compressed, and when the handle assembly switches from the unlocked position to the locked position, the second elastic member is released, driving the handle assembly and the locking portion to move toward the locking groove.

[0039] For example, the angle turning member is annular and has a turning hole, and the side of the angle turning member close to the turning hole is the inner side.

[0040] Compared to existing technologies, the present invention has the following advantages: the mating portion is disposed on the inner side of the angle deflection member, extending radially along the angle deflection member. The extending direction of the mating portion substantially aligns with the mating direction of the locking member, ensuring a stable locking of the locking member and the mating portion, thereby stably locking the jaw assembly. When the surgical instrument closes the jaws, the outer sleeve moves distally, causing the locking member to move proximally, locking the jaw assembly. Once the jaws are closed, they cannot rotate, preventing the jaws from rotating and pulling tissue due to misoperation by medical personnel after the jaws are closed.

[0041] The embodiment of the present disclosure also provides a surgical instrument, comprising: a jaw assembly, an angle steering member, a sleeve assembly, a motion conversion structure and a locking member, wherein the jaw assembly is rotatably connected to the sleeve assembly through the angle steering member; the angle steering member comprises a wall portion and a matching portion, and the matching portion is arranged on the inner side of the wall portion; the sleeve assembly comprises an outer sleeve, which is connected to the jaw assembly, and the outer sleeve is connected to the locking member through the motion conversion structure; the locking member has a locked state and an unlocked state; in the locked state, the locking member is locked with the matching portion to prevent the The jaw assembly rotates relative to the sleeve assembly, and in the unlocked state, the locking member is unlocked from the mating portion, and the jaw assembly rotates relative to the sleeve assembly in response to being operated; when the outer sleeve is located at the proximal position, the jaw assembly is in the open state, and the locking member is in the unlocked state; when the outer sleeve moves from the proximal position to the distal position, the outer sleeve drives the jaw assembly to switch from the open state to the closed state, and the outer sleeve drives the locking member to move proximally through the motion conversion structure to switch the locking member from the unlocked state to the locked state.

[0042] An embodiment of the present disclosure further provides a surgical instrument, comprising a jaw assembly, an angle steering member, a sleeve assembly, and a steering drive structure, wherein the jaw assembly is rotatably connected to the sleeve assembly via the angle steering member; the steering drive structure comprises a handle assembly (operating handle), a locking assembly, and a transmission assembly, wherein the handle assembly (operating handle) is connected to the angle steering member via the transmission assembly. In response to rotation of the handle assembly (operating handle), the transmission assembly drives the angle steering member to rotate, thereby driving the jaw assembly to rotate relative to the sleeve assembly; the handle assembly (operating handle) has a locked position in which it is locked with the locking assembly and an unlocked position in which it is unlocked with the locking assembly; the handle assembly (operating handle) includes a locking portion, the locking assembly including a locking groove, wherein when the handle assembly (operating handle) is in the unlocked position, the locking portion is separated from the locking groove; when the handle assembly (operating handle) is in the locked position, the locking portion is inserted into the locking groove; the locking groove is provided with a guide wall, and when the handle assembly (operating handle) switches from the unlocked position to the locked position, the locking portion is inserted into the locking groove under the guidance of the guide wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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.

[0044] FIG1 is a schematic structural diagram of a surgical instrument provided by one embodiment of the present disclosure;

[0045] FIG2 is a schematic structural diagram of a jaw assembly and a locking member in a surgical instrument provided by an embodiment of the present disclosure;

[0046] FIG3 is a schematic structural diagram of a jaw assembly and a steering structure in a surgical instrument provided by an embodiment of the present disclosure;

[0047] FIG4 is a schematic structural diagram of an angle steering member in a surgical instrument provided by an embodiment of the present disclosure;

[0048] FIG5 is a top view of an angle steering member in a surgical instrument provided by one embodiment of the present disclosure;

[0049] FIG6 is a schematic structural diagram of a locking member in a surgical instrument provided by an embodiment of the present disclosure when the locking member is in an unlocked state;

[0050] FIG7 is a schematic structural diagram of a locking member in a surgical instrument provided by an embodiment of the present disclosure when the locking member is in a locked state;

[0051] FIG8 is a schematic structural diagram of a jaw assembly, a sleeve assembly, and a lever assembly in a surgical instrument provided in one embodiment of the present disclosure;

[0052] 9 to 13 are schematic structural diagrams of a motion conversion mechanism of an outer cannula driving jaws in a surgical instrument provided in one embodiment of the present disclosure;

[0053] FIG14 is a schematic structural diagram of a lever assembly when the outer sleeve of the surgical instrument provided by one embodiment of the present disclosure is in a proximal position;

[0054] FIG15 is an exploded schematic diagram of a lever assembly in a surgical instrument provided in one embodiment of the present disclosure;

[0055] FIG16 is a schematic structural diagram of the lever assembly rotating when the outer sleeve of the surgical instrument provided by one embodiment of the present disclosure is in the distal position;

[0056] FIG17 is a cross-sectional view of a lever assembly in a surgical instrument according to an embodiment of the present disclosure;

[0057] FIG18 is a schematic structural diagram of a cannula assembly, a first driving member, and a second driving member in a surgical instrument provided in one embodiment of the present disclosure;

[0058] FIG19 is a schematic diagram of the connection structure between the second end rod and the locking member of the lever assembly in the surgical instrument provided in one embodiment of the present disclosure;

[0059] FIG20 is an exploded schematic diagram of a locking member, an ejector seat, and an angle turning member in a surgical instrument provided in one embodiment of the present disclosure;

[0060] FIG21 is a partial schematic diagram of point A in FIG2;

[0061] FIG22 is a schematic structural diagram of an ejector pin holder in a surgical instrument provided by an embodiment of the present disclosure;

[0062] FIG23 is a schematic structural diagram of a connecting rod assembly in a surgical instrument provided by an embodiment of the present disclosure in a first position;

[0063] FIG24 is a schematic structural diagram of a connecting rod assembly in a surgical instrument provided by an embodiment of the present disclosure in a second position;

[0064] FIG25 is an exploded view of a steering drive assembly in a surgical instrument provided in one embodiment of the present disclosure;

[0065] FIG26A is a schematic structural diagram of a driving portion, a tip member, and an elastic member in a surgical instrument provided by one embodiment of the present disclosure;

[0066] FIG26B is an exploded view of a tip member, an elastic member, and a driving portion of a surgical instrument provided in an embodiment of the present disclosure;

[0067] FIG27 is a schematic structural diagram of a driving portion of a surgical instrument provided in one embodiment of the present disclosure;

[0068] FIG28 is a schematic structural diagram of a driving portion and a fixing portion of the present disclosure;

[0069] FIG29A is a cross-sectional view of a first transmission member in a surgical instrument provided in one embodiment of the present disclosure;

[0070] FIG29B is a schematic structural diagram of a shift portion and a fixing bead in a surgical instrument provided by one embodiment of the present disclosure;

[0071] FIG29C is a schematic diagram of the structure of point A in FIG29B;

[0072] FIG30 is a schematic structural diagram of an unlocking assembly in a surgical instrument provided by an embodiment of the present disclosure, wherein the connecting rod assembly is located in a second position;

[0073] FIG31 is a schematic structural diagram of an unlocking assembly in a surgical instrument provided by an embodiment of the present disclosure, wherein the connecting rod assembly is located in a first position;

[0074] FIG32 is a schematic structural diagram of an angle steering member (the mating portion is located proximal to the rotation axis of the angle steering member) and a locking member in a surgical instrument provided by another embodiment of the present disclosure;

[0075] FIG33 is a schematic structural diagram of a locking member in a surgical instrument provided by another embodiment of the present disclosure when the locking member is in a locked state;

[0076] FIG34 is a schematic structural diagram of a motion conversion structure in a surgical instrument provided by another embodiment of the present disclosure;

[0077] FIG35A is a side view of a motion conversion structure in a surgical instrument provided by another embodiment of the present disclosure;

[0078] FIG35B is a side view of a steering drive structure in a surgical instrument provided by another embodiment of the present disclosure;

[0079] FIG36 is a schematic structural diagram of an angle steering member (the mating portion is located proximal to the rotation axis of the angle steering member) in a surgical instrument provided by an embodiment of the present disclosure;

[0080] FIG37 is a top view of the angle steering member shown in FIG26;

[0081] FIG38 is an exploded schematic diagram of a lever assembly in a surgical instrument according to an embodiment of the present disclosure;

[0082] FIG39 is a schematic structural diagram of a lever assembly rotating when the outer sleeve of a surgical instrument provided by an embodiment of the present disclosure is in a distal position;

[0083] FIG40 is a cross-sectional view of a lever assembly in a surgical instrument according to an embodiment of the present disclosure;

[0084] FIG41 is a schematic structural diagram of a cannula assembly, a first driving member, and a second driving member in a surgical instrument provided by an embodiment of the present disclosure;

[0085] FIG42 is a schematic diagram of the connection structure between the second end rod and the locking member of a lever assembly in a surgical instrument provided by an embodiment of the present disclosure;

[0086] FIG43 is an exploded schematic diagram of a locking member, an ejector pin seat, and an angle turning member in a surgical instrument provided by an embodiment of the present disclosure; and

[0087] FIG44 is a schematic structural diagram of a thimble seat in a surgical instrument provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0088] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0089] 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. For example, 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.

[0090] 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.

[0091] 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.

[0092] In the prior art, locking teeth are provided on the outer peripheral surface of the angle steering member, and the locking teeth are arranged along the radial direction of the angle steering member. The surgical instrument is also provided with a locking member. When the angle steering member rotates, the locking member corresponds to the locking teeth, and when the two cooperate, the jaw assembly is locked. Due to the width of the sleeve assembly, the two side surfaces of the angle steering member are generally straight, and the outer peripheral surface includes two side straight walls and a central arc-shaped wall. In surgical instruments with a large rotation angle of the jaw assembly, the locking teeth will inevitably be partially arranged on the straight walls. The locking teeth located on the straight walls are not arranged along the radial direction of the angle steering member. When the angle steering member rotates until the locking teeth located on the first side correspond to the locking member, the extension direction of the locking teeth is staggered with the cooperation direction of the locking member, and the cooperation is unstable, resulting in the jaw assembly being unable to be effectively locked.

[0093] One embodiment of the present disclosure provides a surgical instrument, specifically a stapler, as shown in Figures 1 and 2. The surgical instrument includes a jaw assembly 100, a cannula assembly 400, a steering structure 200, and an operating assembly. The cannula assembly 400 is connected between the operating assembly and the jaw assembly 100, and the jaw assembly 100 is rotatably connected to the cannula assembly 400 via the steering structure 200, allowing the jaw assembly 100 to rotate relative to the cannula assembly 400. During surgery, when the jaw assembly 100 is in an open state, the medical staff controls the jaw assembly 100 to rotate a certain angle through the operating assembly. After rotating to the appropriate position, the medical staff operates the operating assembly to close the jaw assembly 100, thereby clamping and squeezing human tissue to facilitate subsequent cutting.

[0094] As shown in Figures 3 to 5, the steering structure 200 includes an angle steering member 210. One end of the angle steering member 210 is rotatably connected to the sleeve assembly 400, and the other end is connected to the jaw assembly 100. In response to the rotation of the angle steering member 210, the jaw assembly 100 rotates relative to the sleeve assembly 400. The angle steering member 210 has an outer peripheral surface 214. The outer peripheral surface 214 is arranged on the outer periphery of the angle steering member 210 around the rotation axis of the angle steering member 210. 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. For example, the rotation axis of a component refers to the rotation axis around which the component can rotate. The dotted line in Figures 3, 4, and 6 represents the rotation axis of the angle steering member 210. Figure 4 shows the rotation axis of the angle steering member 210 with reference numeral L1.

[0095] For example, the angle turning member 210 (the wall portion 211 ) is annular and has an inner side and an outer side relative to the wall portion 211 of the angle turning member 210 .

[0096] Before the jaw assembly 100 closes and clamps the tissue, the jaw assembly 100 can rotate relative to the sleeve assembly 400. After the jaw assembly 100 closes and clamps the tissue, the jaw assembly 100 needs to be locked to prevent the jaw assembly 100 from shaking and pulling the tissue during compression.

[0097] After the jaw assembly 100 is turned, it needs to be locked to prevent the jaw assembly from rotating under external force. As shown in Figures 2, 6, and 8, the surgical instrument includes a locking member 300, which has a locked state and an unlocked state. When the locking member 300 is in the locked state, the locking member 300 cooperates with the mating portion 212 to lock the angle steering member 210, thereby preventing the jaw assembly 100 from moving relative to the sleeve assembly 400. When the locking member 300 is in the unlocked state, the locking member 300 is separated from the mating portion 212, and the jaw assembly 100 rotates relative to the sleeve assembly 400 in response to the rotation of the angle steering member 210.

[0098] The mating portion 212 is located on the inner side of the angle deflection member 210, allowing for better engagement with the locking member 300. If the mating portion 212 were located on the outer circumferential surface 214, the locking effect would be poor when the jaw assembly 100 rotates at a large angle. The specific reasons are as follows: Due to the limited width of the sleeve assembly 400, the first side surface 216 and the second side surface 217 are generally planar and arranged along the axis of the sleeve assembly 400, resulting in a narrow and long angle deflection member 210. The mating portion 212 on the central arcuate surface 215 extends radially along the angle deflection member 210. When the angle deflection member 210 rotates, the mating portion 212 corresponds to the locking member 300, and the mating direction of the locking member 300 is substantially consistent with the extension direction of the mating portion 212. The locking member 300 and the mating portion 212 can engage smoothly, and when the locking member 300 moves proximally to the locked state, it can lock with the mating portion 212. When the jaw assembly 100 is capable of rotating to a greater angle, the number of mating portions 212 provided on the outer peripheral surface 214 is increased so that a mating portion 212 can correspond with the locking member 300 when the angle deflection member 210 is rotated to a greater angle. This results in the provision of mating portions 212 on both the first side surface 216 and the second side surface 217. The mating portions 212 on the first side surface 216 extend generally perpendicular to the first side surface 216, rather than being arranged in a radial direction of the angle deflection member 210. When the angle deflection member 210 is rotated until the mating portion 212 on the first side surface 216 corresponds to the locking member 300, the extension direction of the mating portion 212 is offset from the mating direction of the locking member 300, resulting in unstable mating. The second side surface 217 is substantially parallel to the first side surface 216. Similar to the first side surface 216, the mating portion 212 and the locking member 300 thereon cannot be stably mated, so that when the jaw assembly 100 rotates at a large angle, the locking member 300 cannot be stably mated with the mating portion 212, and the jaw assembly 100 cannot be effectively locked.

[0099] In the surgical instrument provided in the embodiment of the present disclosure, the rotation axis of the angle steering member 210 is located inside the wall portion 211, so that the mating portion 212 is disposed inside the angle steering member 210 and extends in the radial direction of the angle steering member 210. When the angle steering member 210 rotates at a large angle, the extension direction of the mating portion 212 is substantially consistent with the mating direction of the locking member 300, both being in the direction of the axis of the sleeve assembly 400. This ensures a stable locking between the locking member 300 and the mating portion 212, thereby stably locking the jaw assembly 100.

[0100] For example, there are multiple matching parts 212, which are arranged around the rotation axis of the angle steering member 210. Each matching part 212 is extended along the radial direction of the angle steering member 210. When the locking member 300 is in the unlocked position, it corresponds to at least one of the matching parts 212. When the locking member 300 moves to the locked position, it cooperates with the corresponding matching part 212 to lock the angle steering member 210.

[0101] For example, one of the mating portion 212 and the locking member 300 is provided with a locking tooth, and the other is provided with a mating groove. The locking tooth 2121 (as shown in FIG. 4 ) engages with the mating groove to lock the mating portion 212 and the locking member 300, and the locking tooth 2121 separates from the mating groove to unlock the mating portion 212 and the locking member 300. The locking tooth and the mating groove are plugged into and engaged with each other, effectively limiting the rotation of the angle steering member 210. For example, the mating portion 212 includes a locking tooth 2121, e.g., a plurality of locking teeth 2121, each of which is arranged to form an internal tooth structure, and each of the locking teeth 2121 points toward the rotation axis of the angle steering member 210. The locking member 300 is provided with a mating groove, the mating groove having a generally V-shaped cross-section that matches the locking tooth 2121.

[0102] For example, the mating portion 212 includes a first mating portion at the leading end and a second mating portion at the trailing end. When the first mating portion engages with the locking element 300, the angle between the jaw assembly 100 and the extension of the cannula assembly 400 is greater than or equal to 70°, for example, the angle may be greater than or equal to 70° and less than or equal to 75°. When the second mating portion engages with the locking element 300, the angle between the jaw assembly 100 and the extension of the cannula assembly 400 is greater than or equal to 70°, for example, the angle may be greater than or equal to 70° and less than or equal to 75°. When the first mating portion engages with the locking element 300, the jaw assembly 100 rotates to the left to its maximum angle; when the second mating portion engages with the locking element 300, the jaw assembly 100 rotates to the right to its maximum angle. In the surgical instrument provided in the embodiments of the present disclosure, the maximum unilateral rotation angle of the jaw assembly 100 is greater than or equal to 70°, which can better grasp the target tissue during surgery.

[0103] For example, each engaging portion is disposed distally of the rotation axis of the angle steering member, and the locking member switches from an unlocked state to a locked state by distal movement. As shown in Figures 2, 13 to 16, 18 to 19, 23 to 24, and 35A, the cannula assembly includes an inner cannula 410 and an outer cannula 420. The outer cannula 420 is sleeved on the outer surface of the inner cannula 410 and is movable relative to the inner cannula 410. The outer cannula 420 is connected to the locking member 300. The outer cannula 420 has a proximal position and a distal position. In response to the operation of the medical staff, the outer cannula moves from the proximal position to the distal position.

[0104] When the outer sleeve 420 is in the proximal position, the locking member 300 is in the unlocked state; when the outer sleeve 420 moves from the proximal position to the distal position, and the outer sleeve 420 drives the locking member 300 to move distally, the locking member 300 switches from the unlocked state to the locked state, and the locking member 300 locks the angle steering member 210, so that the angle steering member 210 cannot rotate, thereby preventing the jaw assembly 100 from rotating relative to the sleeve assembly 400.

[0105] For example, the jaw assembly 100 has an open state and a closed state. When the outer sleeve moves distally, it pushes the jaw assembly to switch from the open state to the closed state. When the outer sleeve 420 is in the proximal position, the jaw assembly 100 is in the open state, the locking element 300 is in the unlocked state, and the jaw assembly 100 rotates relative to the sleeve assembly 400 in response to the rotation of the angle steering element 210. When the outer sleeve 420 moves from the proximal position to the distal position, the jaw assembly 100 switches to the closed state, and the outer sleeve 420 drives the locking element 300 to move distally, causing the locking element 300 to switch from the unlocked state to the locked state. The locking element 300 locks the angle steering element, preventing the angle steering element 210 from rotating, thereby preventing the jaw assembly 100 from rotating relative to the sleeve assembly 400. The locking of the jaw assembly 100 is achieved simultaneously with the closing of the jaw assembly 100, preventing the jaw assembly 100 from rotating and pulling the tissue while clamping.

[0106] Switching the outer sleeve 420 from the proximal position to the distal position, and switching the jaw assembly 100 from the open state to the closed state, is achieved in the following manner.

[0107] As shown in Figures 9 to 13, the jaw assembly 100 includes a staple cartridge seat 110, an anvil 120 rotatably connected to the staple cartridge seat 110, and a motion conversion mechanism is provided between the outer sleeve 420 and the anvil 120 of the jaw assembly 100. The motion conversion mechanism converts the linear motion of the outer sleeve 420 into the pivotal motion of the anvil 120, thereby enabling the anvil 120 to pivot relative to the staple cartridge seat 110 to close or open the jaw assembly 100. For example, when the outer sleeve 420 moves toward the proximal end, the motion conversion mechanism drives the anvil 120 to pivot upward to open the jaw assembly 100. When the outer sleeve 420 moves toward the distal end, the motion conversion mechanism drives the anvil 120 to pivot downward to close the jaw assembly 100.

[0108] 9 , the outer sleeve 420 includes a body 425 and a drive tube 426 connected thereto, wherein the drive tube 426 drives the anvil 120 to pivot upward or downward to open or close the jaw assembly 100. The body 425 and the drive tube 426 are connected by a hinge.

[0109] As shown in Figures 9 and 10, 12 and 13, the motion conversion mechanism includes a first driving member 4261 and a first driving member 4262 provided on the driving tube 426, and a first driven portion 121 and a second driven portion 122 provided on the anvil 120.

[0110] The first driving member 4261 drives the anvil 120 to open. The first driving member 4261 is a protrusion provided on the driving tube 426 and extends obliquely along the lower right side. The first driving member 4262 drives the anvil 120 to close. The first driving member 4262 is a driving surface at the distal end of the driving tube 426.

[0111] Correspondingly, the first follower 121 can be mated with the first driving member 4261. The first follower 121 is a protrusion provided on the anvil 120 and extends upward. The second follower 122 can be mated with the first driving member 4262. The second follower 122 is an abutting surface at the proximal end of the anvil 120.

[0112] A guiding mechanism is also provided between the anvil 120 and the nail magazine seat 110, and the guiding mechanism includes a pin 123 provided on the anvil 120 and an oblique waist-shaped groove 111 provided on the nail magazine seat 110, and the oblique waist-shaped groove 111 extends upwardly in a direction from the proximal end to the distal end.

[0113] Please refer to the state changes in Figures 13 to 12. When the jaw assembly 100 needs to be closed, the main body 425 of the outer sleeve 420 pushes the drive tube 426 to move toward the distal end, and the first drive member 4262 on the drive tube 426 abuts against the second follower 122 on the pin seat 120. The pin 123 moves from the proximal lower end of the oblique waist-shaped groove 111 to the distal upper end, and the pin seat 120 pivots downward, and the jaw assembly 100 is closed.

[0114] Please refer to the state changes from Figure 12 to Figure 13. When the jaw assembly 100 needs to be opened, the main body 425 of the outer sleeve 420 pulls the drive tube 426 toward the proximal end, and the first driving member 4261 on the drive tube 426 abuts against the first follower 121 on the pin seat 120. The pin 123 moves from the far upper end of the oblique waist-shaped groove 111 to the proximal lower end, and the pin seat 120 pivots upward, and the jaw assembly 100 opens.

[0115] The surgical instrument includes a frame 600, and a transmission structure is disposed on the frame 600. For example, the outer sleeve 420 is connected to the locking member 300 via the transmission structure. In one embodiment, as shown in Figures 8 to 16, the transmission structure 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 via the rotating portion 512. The first connecting portion 513 and the second connecting portion 514 are both located on the same 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 300. The outer sleeve 420 moves in a first direction, driving 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 300 in the first direction. The movement direction of the first connecting portion 513 and the movement direction of the second connecting portion 514 are the same, so that the outer sleeve 420 and the locking member 300 move in the same direction. As shown in Figure 16, when the outer sleeve 420 moves distally, the first connecting portion 513 rotates clockwise, and the second connecting portion 514 rotates clockwise, driving the locking member 300 to move distally. When the outer sleeve 420 moves proximally, the first connecting portion 513 rotates counterclockwise, and the second connecting portion 514 rotates counterclockwise, driving the locking member 300 to move proximally.

[0116] For example, the distance between the second connection portion 514 and the rotating portion 512 is smaller than the distance between the first connection portion 513 and the rotating portion 512. In the lever structure, the distance between the first connection portion 513 and the rotating portion 512 is the power arm, and the distance between the second connection 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 300 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 300 to move. At the same time, when the locking member 300 is in the locked position, the outer sleeve 420 is locked at the distal position by the operating assembly. The locking force applied to the outer sleeve 420 provides a greater locking force to the locking member 300 through the lever member 511, so that the locking member 300 is better maintained in the locked position.

[0117] For example, as shown in Figures 14 to 17, two lever members 511 are formed, and the rotation axes 512 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 to form a frame. 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, connecting the first connecting portions 513 of the two lever members 511 to the outer sleeve 420; the second end rod 5141 is connected to the locking member 300, connecting the second connecting portions 514 of the two lever members 511 to the locking member 300. Of course, in other embodiments, only one lever member 511 may be provided, and 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 300, which may be a rod body or a hole, etc. The embodiments of the present disclosure do not make specific limitations on this.

[0118] 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 about 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 susceptible to getting stuck during movement. To address this issue, the outer sleeve 420 and the first connection portion 513 are movably connected via a guide structure. When the outer sleeve 420 moves in a first direction, the guide structure drives the first connection portion 513 to rotate about the rotating portion 512 of the lever member 511. For example, the first direction is the axis of the sleeve assembly 400.

[0119] The axial direction 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.

[0120] When the lever member 511 is driven to rotate, the second connecting portion 514 moves in an arcuate path. The second connecting portion 514 connects to and drives the locking member 300 to move only in the X-direction. To ensure that the second connecting portion 514 can only drive the locking member 300 to move in the X-direction, the second connecting portion 514 and the locking member 300 are movably connected via a guide structure. When the second connecting portion 514 rotates about the rotating portion 512, it displaces in both the X-direction and the Y-direction. In the X-direction, the locking member 300 moves with the second connecting portion 514. In the Y-direction, the locking member 300 moves relative to the second connecting portion 514 via the guide structure, ensuring that the second connecting portion 514 remains connected to the locking member 300. The second connecting portion 514, via the guide structure, drives the locking member 300 to move only in the X-direction.

[0121] The guide structure includes a motion rod and a motion groove 423. 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 423. 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 423 (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.

[0122] In the guiding structure in which the first connecting portion 513 is connected to the outer sleeve 420, as shown in Figures 15 to 18, the moving rod is connected to the first connecting portion 513, specifically the first end rod 5131, and the outer sleeve 420 is provided with a first driving member 421 and a first driving member 422. The first driving member 421 and the first driving member 422 are arranged on the lower side of the outer sleeve 420 and extend roughly along the Y direction. A moving groove 423 is formed between the first driving member 421 and the first driving member 422, and the moving groove 423 extends roughly along the Y direction. The first end rod 5131 is located in the moving groove 423 and can move in the moving groove 423 along the length direction of the moving groove 423 (roughly the Y direction).

[0123] As shown in Figures 15 to 17, in the guide structure connecting the second connecting portion 514 to the locking member 300, the movable rod is the second end rod 5141, which is connected to the locking member 300. As shown in Figure 15, the proximal end of the locking member 300 is provided with a U-shaped slot, through which the locking member 300 engages with the second end rod 5141. The second end rod 5141 is engaged within the U-shaped slot, which can drive the locking member 300 to move proximally or distally. The inner sleeve 410 is provided with a sliding slot 412, and the second end rod 5141 is disposed within the sliding slot 412. The second end rod 5141 can only move in the X direction within the sliding slot 412. A movable groove, such as a waist-shaped groove 5142, is defined on the lever member 511. The ends of the second end rod 5141 are respectively positioned within the waist-shaped grooves 5142 of the two lever members 511. The waist-shaped grooves 5142 extend generally 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 grooves 5142 of the two lever members 511 and slide along the length of the waist-shaped grooves 5142 (displacement in the Y-direction), allowing the second connecting portion 514 to only drive the locking member 300 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 300, and the other end is positioned within the movable groove 423.

[0124] For example, as shown in Figures 2 and 20 to 22, the sleeve assembly 400 is provided with an ejector seat 411, which is fixedly mounted on the inner sleeve 410 and rotatably connected to the angle steering member 210. For example, as shown in Figures 4 to 6 and 20 to 22, the angle steering member 210 is provided with a steering hole 213, and the ejector seat 411 is provided with a fixed shaft 4115. The angle steering member 210 is fixedly connected to the ejector seat 411 through the coordination of the steering hole 213 and the fixed shaft 4115. As shown in Figure 4, the angle steering member 210 is provided with a groove 2111, which is the mating portion 212. The groove 2111 is located on the inner side of the wall portion 211, and the steering hole 213 is connected to the groove 2111. As shown in Figures 6 and 7, and Figures 20 to 22, the locking member 300 includes a pull rod 310 and a locking portion 320. The pull rod 310 is connected to the lever member 511 at its proximal end and to the locking portion 320 at its distal end. The locking portion 320 includes a locking head 330 and a body 340, with the body 340 being connected to the locking head 330. In the unlocked state, the locking head 330 is separated from the mating portion 212. After the jaw assembly 100 is turned, the medical staff operates the handle 800 (as shown in Figure 23) to move the outer sleeve 420 distally, thereby closing the jaw assembly 100. When the outer sleeve 420 moves distally, the locking member 300 moves distally, switching the locking member 300 from the unlocked state to the locked state. At this time, the locking head 330 moves distally in the steering hole 213, moves into the groove 2111, and engages with the groove 2111 (i.e., the mating portion 212), locking the angle steering member 210, thereby achieving rotational locking of the jaw assembly 100. The ejector seat 411 may also adopt the structure shown in FIG. 44 .

[0125] For example, the side of the angle turning member 210 close to the turning hole 213 is the inner side, and the side away from the turning hole 213 is the outer side. For example, the turning hole 213 is the inner hole of the annular angle turning member 210.

[0126] The ejector seat 411 is provided with a first receiving groove 4111 (as shown in FIG20 ) and a second receiving groove 4112 (as shown in FIG21 ). The first receiving groove 4111 is connected to the second receiving groove 4112. The pull rod 310 is partially located in the first receiving groove 4111 and can move in the first receiving groove 4111. The main body 340 is located in the second receiving groove 4112 and can move proximally or distally in the second receiving groove 4112. The second receiving groove 4112 has a limiting area 4114 (as shown in FIG21 ). The main body 340 has a protruding portion 321 that is received in the limiting area 4114. For example, when the locking member 300 is in the locked position, the protrusion 321 abuts against the distal wall 41141 of the limiting region 4114. When the locking member 300 is in the unlocked position, the protrusion 321 abuts against the proximal wall 41142 of the limiting region 4114. The arrangement of the limiting region 4114 and the protrusion 321 restricts the locking member 300 to movement between the locked and unlocked positions. Simultaneously, the pull rod 310 abuts against the inner walls of the first receiving groove 4111, and the locking portion 320 abuts against the inner walls of the second receiving groove 4112, preventing the locking member 300 from rocking left or right.

[0127] The ejector seat 411 is also provided with a third receiving groove 4113, which is connected to the second receiving groove 4112, and the third receiving groove 4113 passes through the fixed shaft 4115, and the third receiving groove 4113 accommodates the locking head 330. The third receiving groove 4113 corresponds to the groove 2111, so that the locking head 330 can slide out of the third receiving groove 4113 and cooperate with the groove 2111.

[0128] In other embodiments, the mating portion 212 is provided on the upper surface of the angle steering member 210 and is provided along the thickness direction of the angle steering member 210. A plurality of mating portions 212 are arranged around the rotation axis of the angle steering member 210 and face the rotation axis of the angle steering member 210. In the locked position, the locking head 330 engages with at least one mating portion 212; in the unlocked position, the locking head 330 is located above the upper surface of the angle steering member 210. The surgical instrument provided by the embodiment of the present disclosure controls the jaw assembly 100 to turn, and controls the outer sleeve 420 to move distally to close the jaw assembly 100. The distal movement of the outer sleeve 420 drives the locking member 300 to switch from the unlocked position to the locked position to lock the jaw assembly 100, thereby preventing the jaw assembly 100 from rotating relative to the sleeve assembly 400 after the jaw assembly 100 is closed.

[0129] After completing the turning of the jaw assembly 100, the medical staff actuates the handle 810 to close the jaw assembly 100 to clamp the human tissue, and locks the jaw assembly 100 to the angle turning member 210 to complete the complete locking of the jaw assembly 100. The surgical instrument has a handle 800, and the medical staff can control the outer sleeve 420 to move toward the distal end by actuating the handle 800. Controlling the movement of the outer sleeve 420 by actuating the handle 800 is achieved through the following structure.

[0130] As shown in Figures 23 and 24, the surgical instrument includes a link assembly 610 disposed on a frame 600. The link assembly 610 includes a first link 611 and a second link 612. The distal end of the first link 611 is connected to the proximal end of the outer sleeve 420, 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 800 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.

[0131] 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.

[0132] For example, the handle 800 is provided with a support portion, which is located on the lower side of the connecting rod assembly 610. When the connecting rod assembly 610 switches from the first position to the second position, the handle 800 supports the first connecting rod 611 or the second connecting rod 612 via the support portion, so as to be operably engaged with the connecting rod assembly 610. When the connecting rod assembly 610 is in the second position and locked in the second position, the support portion separates from the connecting rod assembly 610 when the handle 800 is reset and rebounds. When the handle 800 is subsequently actuated, the handle 800 switches from the initial position to the pressing position, and the support portion moves with the movement of the handle 800. The support portion 100 contacts the connecting rod assembly 610 in the second position only when the handle 800 reaches the pressing position (the end point of the support portion's movement trajectory). That is, the support portion does not contact the connecting rod assembly 610 during the movement process, and therefore the handle 800 cannot drive the connecting rod assembly 610 during subsequent actuation. For example, the supporting portion is a rod, and the handle 800 is operably engaged with the connecting rod assembly 610 by supporting the second connecting rod 213 through the supporting portion. During the rotation of the second connecting rod 213, the supporting portion can always support the second connecting rod 213.

[0133] During the process of switching the connecting rod assembly 610 from the first position to the second position, the hinge point gradually moves to the upper side (the side away from the gripping part of the handle 800). Since the proximal end of the second connecting rod 612 is connected to the frame 600, the hinge point 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 of the surgical instrument. 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 to close the jaw assembly 100.

[0134] After the jaw assembly 100 is closed, the link assembly 610 self-locks in the second position, locking the outer sleeve 420 in the distal position, thereby keeping the locking member 300 in the locked position, thereby maintaining the locking of the jaw assembly 100.

[0135] For example, as shown in Figures 8 and 25 to 29C, the surgical instrument further includes a steering drive assembly 700, which is disposed on the frame 600 and is used to control the rotation of the jaw assembly 100. The steering drive assembly 700 includes an operating handle 710, a driving unit 720, a first transmission member 760, a fixing unit 730, a second transmission member, and a push rod assembly 750. For example, 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 through the push rod assembly 750. The operating handle 710 is used to be operated and rotated by medical personnel. The operating handle 710 is connected to the driving unit 720. For example, the operating handle 710 and the driving unit 720 can be provided as one piece, but are not limited thereto. The operating handle 710 and the driving unit 720 can rotate synchronously. The driving unit 720 is connected to the first transmission member 760, driving the first transmission member 760 to rotate. The first transmission member 760 is connected to the push rod assembly 750 through the second transmission member. The first transmission member 760 drives the push rod assembly 750 to move through the second transmission member, thereby driving the angle steering member 210 to rotate. For example, the fixed portion 730 is disposed on the frame 600, and the first transmission member 760 is rotatably disposed within the fixed portion 730. The first transmission member 760 defines a sliding space 763, and the driving unit 720 is located within the sliding space 763. The push rod assembly 750 includes a left push rod 751 and a right push rod 752. The second transmission member includes a gear assembly 740. The gear assembly 740 includes a left gear portion 741 and a right gear portion 742. The left gear portion 741 and the right gear portion 742 are connected to the frame 600 and are respectively disposed on either side of the first transmission member 760. The left gear portion 741 and the right gear portion 742 each include two coaxially arranged upper and lower gears. The left push rod 751 meshes with the lower gear of the left gear portion 741, and the right push rod 752 meshes with the lower gear of the right gear portion 742. The first transmission member 760 has a tooth structure on its lower side that meshes with both the upper gears of the left gear portion 741 and the upper gears of the right gear portion 742. When a medical professional rotates the operating handle 710, the drive portion 720 rotates. The drive portion 720 drives the left and right gear portions 741, 742 to rotate via the first transmission member 760. For example, the left and right gear portions 741, 742 rotate in opposite directions, 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 of the cannula assembly 400. The distal ends of the left push rod 751 and the right push rod 752 are close to the angle steering member 210. When the driving unit 720 rotates and drives the left push rod 751 and the right push rod 752 to move, the angle steering member 210 is rotated, thereby rotating the jaw assembly 100. For example, when the medical staff rotates the operating handle 710 counterclockwise, the left push rod 751 moves proximally and the right push rod 752 moves distally, and the right push rod 752 pushes the angle steering member 210 to rotate leftward.When the medical staff rotates the operating handle 710 clockwise, the left push rod 751 moves distally and the right push rod 752 moves proximally, and the left push rod 751 pushes the angle steering member 210 to rotate rightward. For example, as shown in FIG3 , 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 and drives the left push rod 751 and the right push rod 752 to move, for example, when the operating handle 710 is rotated clockwise, the left push rod 751 moves distally and the right push rod 752 moves proximally. 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 rightward, and the right abutting portion 219 is driven to move proximally, always abutting against the right push rod 752. Rotate the operating handle 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.

[0136] For example, the left push rod 751 and the right push rod 752 can also be referred to as the first push rod and the second push rod respectively, the left gear portion 741 and the right gear portion 742 can also be referred to as the first gear portion and the second gear portion respectively, and the left supporting portion 218 and the right supporting portion 219 can also be referred to as the first supporting portion and the second supporting portion respectively.

[0137] For example, the steering drive assembly 700 can lock the push rod assembly 750. The operating handle 710 includes a locking portion 7200 (as shown in FIG. 26A ). The fixing portion 730 includes a locking groove 731. When the operating handle 710 is in the unlocked position, the locking portion 7200 is separated from the locking groove 731. When the operating handle 710 is in the locked position, the locking portion 7200 is engaged with the locking groove 731. The locking groove 731 has a guide wall 7311. When the operating handle 710 switches from the unlocked position to the locked position, the locking portion 7200 moves toward the locking groove 731 and is guided by the guide wall 7311 to engage with the locking groove 731. The provision of the guide wall 7311 ensures that even if the locking portion 7200 and the locking groove 731 are misaligned, the locking portion 7200 can still engage with the locking groove 731, allowing the operating handle 710 to return to its original position smoothly.

[0138] The first transmission member 760 includes a transmission member body and an end member 761. The end member 761 is located within the sliding space and is fixedly connected to the transmission member body. As shown in Figures 26A and 29A, the end member 761 is fixed to the transmission member body by screws 765. For example, the end member 761 is located at the far end of the sliding space. Slide grooves 7612 are defined on both sides of the end member 761 in the width direction. The length of the slide grooves 7612 is the same as the length of the sliding space. The driving unit 720 includes two sliders 722, which are respectively inserted into the two slide grooves 7612 on both sides of the end member 761 to slideably connect the driving unit 720 and the end member 761. The operating handle 710 is slidably connected to the first transmission member 760. When the operating handle 710 is rotated to the left, the right portion of the slider 722 abuts against the bottom of the right slide groove 7612, driving the first transmission member 760 to rotate leftward. The same applies to rightward rotation. The end piece 761 is provided with a receiving groove 7611, which is a circular groove. The elastic piece 762 is connected to the end piece 761 and is partially received in the receiving groove 7611. The receiving groove 7611 limits the axial position of the elastic piece 762 to prevent the elastic piece 762 from deflecting or bending, and always provides elastic force along the length direction of the sliding space.

[0139] When the steering drive assembly 700 is not operated, the elastic member 762 is in the initial state so that the drive part 720 is in the locked position, the mating teeth 721 are engaged with the locking teeth 731, and the drive part 720 is locked and cannot rotate. At the same time, since the drive part 720 is engaged with the gear assembly 740, and the gear assembly 740 is engaged with the push rod assembly 750, the drive part 720 is locked, so that both the gear assembly 740 and the push rod assembly 750 are locked, thereby locking the jaw assembly 100 to prevent it from rotating.

[0140] Manually moving the operating handle 710 causes the driving portion 720 to slide relative to the fixed portion 730, switching the driving portion 720 from the locked position to the unlocked position. At this time, the elastic member 762 is in a compressed state, the mating teeth 721 are separated from the locking teeth 731, and the driving portion 720 is unlocked. The medical staff can rotate the operating handle 710 to drive the driving portion 720 to rotate, thereby driving the jaw assembly 100 to rotate. After the jaw assembly 100 is rotated to the appropriate position, the operating handle 710 is released, and the elastic member 762 is released and rebounds to its initial state, pushing the driving portion 720 to slide. The mating teeth 721 and the locking teeth 731 are engaged again, causing the driving portion 720 to be locked to the fixed portion 730 again, thereby locking the jaw assembly 100. That is, after the control of the jaw assembly 100 is completed, the jaw assembly 100 can be locked by releasing the operating handle 710.

[0141] For example, the locking tooth 731 is arranged at the proximal end of the fixing portion 730, and the mating tooth 721 is arranged at the proximal end of the driving portion 720. Medical staff can push the operating handle 710 forward to move the driving portion 720 toward the distal end to switch from the locked position to the unlocked position. In the unlocked position, the operating handle 710 is rotated to control the direction of the jaw assembly 100.

[0142] When performing surgery, medical personnel insert the jaw assembly 100 and part of the cannula assembly 400 of the surgical instrument into the human body. The jaw assembly 100 is in the straight-strike position, and the length direction of the jaw assembly 100 is collinear with the axis of the cannula assembly 400, which facilitates the insertion of the jaw assembly 100 into the human body. The steering drive assembly 700 is unlocked by pushing the operating handle 710 forward, and the operating handle 710 is rotated to turn the jaw assembly 100. After the jaw assembly 100 is rotated to a suitable angle, the medical personnel releases the operating handle 710, and the operating handle 710 retracts, and the drive unit 720 moves to the locked position, preliminarily locking the jaw assembly 100. The medical personnel then actuates the handle 800 to close the jaw assembly 100, clamping and squeezing the patient's tissue. At the same time, the locking member 300 moves to the locked position, further locking the jaw assembly 100. After squeezing for a certain period of time, the medical staff controls the cutting blade assembly to advance the blade to fire. During the firing process, the cutting blade assembly moves distally to cut the patient's tissue; during the firing process, the jaw assembly 100 is locked and does not rotate, ensuring stable cutting. After the firing is completed, the cutting blade assembly retracts proximally. After the retraction is completed, the medical staff opens the jaw assembly 100, and the outer sleeve 420 moves from the distal position to the proximal position. This process causes the locking member 300 to move to the unlocked state. The jaw assembly 100 is then controlled by the steering drive assembly 700 to rotate back to the straight-cut position, and finally the jaw assembly 100 is removed from the human body.

[0143] For example, the surgical instrument also includes a motor assembly and a main control module. The main control module is electrically connected to the motor assembly, and the motor assembly is connected to the cutting knife assembly. The main control module controls the operation of the motor assembly according to the position of the handle 800 and the position of the cutting knife assembly to realize the advancement and retraction of the cutting knife assembly. The specific implementation of advancement and retraction can be referred to the existing technology and will not be repeated here.

[0144] The surgical instrument also includes an unlocking assembly, as shown in Figures 30 and 31, which includes a release button 910 provided outside the shell of the operating assembly, and an unlocking rod 920 located in the shell of the operating assembly and abutting against the connecting rod assembly 610 located in the second position. The unlocking rod 920 is linked to the release button 910, and the release button 910 has a driving rod 911. When the medical staff operates the release button 910, specifically when pushing the release button 910, the release button 910 and the driving rod 911 rotate synchronously, and the rotating driving rod 911 acts on the release rod 920 to rotate the unlocking rod 920, and the unlocking rod 920 abuts against one end of the connecting rod assembly 610 and moves downward to push the connecting rod assembly 610, so that the connecting rod assembly 610 returns to the first position, and the jaw assembly 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 210, 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 300 to move to the unlocked state. After the knife is retracted, the medical staff operates the release button 910 to open the jaw assembly 100, then operates the steering knob 710 to rotate the jaw assembly 100 to the straight-strike position, and finally removes the jaw assembly 100 from the human body.

[0145] An embodiment of the present disclosure provides a surgical instrument, specifically a stapler, as shown in Figures 1 and 2. The surgical instrument includes a jaw assembly 100, a sleeve assembly 400, a steering structure 200 and an operating assembly 810. The sleeve assembly 400 is connected between the operating assembly 810 and the jaw assembly 100, and the jaw assembly 100 is rotatably connected to the sleeve assembly 400 through the steering structure 200, so that the jaw assembly 100 can rotate relative to the sleeve assembly 400. During surgery, when the jaw assembly 100 is in an open state, the medical staff controls the jaw assembly 100 to rotate a certain angle through the operating assembly 810. After rotating to the appropriate position, the jaw assembly 100 is closed by operating the operating assembly 810 to clamp and squeeze the human tissue to facilitate subsequent cutting.

[0146] As shown in Figures 1, 8, and 25, the surgical instrument further includes a steering drive mechanism 700, which is connected to the steering mechanism 200. A medical professional can operate the steering drive mechanism 700 to apply force to the angle steering member 210, causing the angle steering member 210 to rotate. The steering drive mechanism 700 is located at the proximal end of the cannula assembly 400 and includes a handle assembly 777, a locking assembly, and a transmission assembly. The handle assembly 777 is connected to the angle steering member 210 via the transmission assembly. The handle assembly 777 has a locked position and an unlocked position. In the locked position, the handle assembly 777 is locked by the locking assembly, preventing the medical professional from rotating the handle assembly 777. In the unlocked position, the handle assembly 777 is unlocked from the locking assembly, allowing the medical professional to rotate the handle assembly 777. In response to the rotation of the handle assembly 777, the transmission assembly drives the angle steering member 210 to move, thereby driving the jaw assembly 100 to rotate. The handle assembly 777 has a locked position, in which it is locked with the locking assembly, and an unlocked position, in which it is unlocked from the locking assembly.

[0147] As shown in FIG25 , the first transmission member 760 is generally cylindrical and has a sliding space 763 defined thereon. A tooth structure is provided at the bottom thereof for engaging with the gear assembly 740. The sliding space 763 is provided at the top of the first transmission member 760. The handle assembly 777 includes an operating handle 710 and a drive unit 720. A locking portion 7200 is provided at the drive unit 720. The operating handle 710 and the drive unit 720 are pluggably connected or integrally formed. Rotation of the operating handle 710 drives the drive unit 720 to rotate synchronously. The lower portion of the drive unit 720 is located within the sliding space 763. For example, when the jaw assembly 100 is in the straight-engaging position, the sliding space 763 is provided along the axis of the sleeve assembly 400, enabling the handle assembly 777 to slide along the axis of the sleeve assembly 400 relative to the first transmission member 760. The straight-engaging position refers to the position in which the longitudinal direction of the jaw assembly 100 is substantially aligned with the axis of the sleeve assembly 400. When rotating the handle assembly 777, first move the handle assembly 777 proximally or distally along the axial direction of the sleeve assembly 400 to switch from the locked position to the unlocked position, that is, unlock the handle assembly 777 by pushing the handle assembly 777 forward, or unlock the handle assembly 777 by pulling the handle assembly 777 backward.

[0148] For example, as shown in Figure 25, the handle assembly 777 is movably connected to the first transmission member 760, and when the handle assembly 777 is operated, it moves relative to the first transmission member 760 to switch from a locked position to an unlocked position or from an unlocked position to a locked position; when the handle assembly 777 is in the unlocked position, in response to the rotation of the handle assembly 777, the first transmission member 760 is configured to drive the push rod assembly 750 to move through the second transmission member, thereby driving the angle steering member 210 to rotate.

[0149] For example, as shown in FIG. 25 , the transmission assembly includes a first transmission member 760 , a second transmission member, and a push rod assembly 750 . For example, the second transmission member includes a gear assembly 740 .

[0150] For example, as shown in Figure 25, the first transmission member 760 is engaged with the gear assembly 740, and the gear assembly 740 is engaged with the push rod assembly 750. In response to the rotation of the handle assembly 777, the first transmission member 760 is configured to drive the gear assembly 740 to rotate, thereby driving the push rod assembly 740 to move toward the distal end or the proximal end.

[0151] For example, as shown in FIG. 25 , the handle assembly 777 is movably connected to the transmission assembly, and when the handle assembly 777 is operated, it moves relative to the transmission assembly to switch from a locked position to an unlocked position or from an unlocked position to a locked position.

[0152] For other details about the first transmission member 760 , the second transmission member and the push rod assembly 750 , please refer to the previous description. For other details about the gear assembly 740 , please refer to the previous description, which will not be repeated here.

[0153] The surgical instrument further includes a jaw locking structure, which includes a locking element 300. As shown in Figures 32 to 34, an outer sleeve 420 is connected to the locking element 300. The locking element 300 has a locked state and an unlocked state. In the locked state, the locking element 300 is locked with the steering structure 200 to prevent the jaw assembly 100 from rotating relative to the sleeve assembly 400. In the unlocked state, the locking element 300 is unlocked from the steering structure 200, and the jaw assembly 100 rotates relative to the sleeve assembly 400 in response to rotation of the handle assembly 777. 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 element 300 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 element 300 is driven to move, causing the locking element 300 to switch to the locked state.

[0154] When a medical professional operates the steering drive mechanism 700 to rotate the jaw assembly 100, the jaw assembly 100 is in an open position. For example, referring to Figures 1 and 34 , the operating assembly 810 includes a handle 800. The medical professional actuates the handle 800 to move the outer cannula 420 from a proximal position to a distal position. The outer cannula 420 is connected to the jaw assembly 100 and moves toward the distal position, driving the jaw assembly 100 to close. After the jaw assembly 100 rotates to a specified angle, the medical professional actuates the handle 800 to close the jaw assembly 100. The jaw assembly 100 closes to clamp human tissue for subsequent cutting. When the jaw assembly 100 is closed to clamp human tissue, it should be completely locked and unable to rotate to avoid pulling on the tissue. The surgical instrument also includes a locking member 300. When the outer cannula 420 moves to the distal position, the jaw assembly 100 is in a closed position. The locking member 300 is in a locked position, locking the steering mechanism 200 and preventing the jaw assembly from rotating.

[0155] As shown in Figures 26A, 28, and 29B, the handle assembly 777 includes a locking portion 7200 (matching teeth 721) and a locking groove 731. When the handle assembly 777 is in the unlocked position, the locking portion 7200 is separated from the locking groove 731. When the handle assembly 777 is in the locked position, the locking portion 7200 is engaged with the locking groove 731. The locking groove 731 has a guide wall 7311. When the handle assembly 777 switches from the unlocked position to the locked position, the locking portion 7200 moves toward the locking groove 731 and is guided by the guide wall 7311 to engage with the locking groove 731. The provision of the guide wall 7311 ensures that even if the locking portion 7200 and the locking groove 731 are misaligned, the locking portion 7200 can still be engaged with the locking groove 731, allowing the handle assembly 777 to return to its original position smoothly.

[0156] As shown in FIG28 , the locking groove 731 includes two guide walls 7311 arranged in a V-shape. Both guide walls 7311 guide toward the bottom of the locking groove 731. The locking portion 7200 includes two mating walls 7211. The mating walls 7211 and the guide walls 7311 have the same inclination angle. When the guide walls 7311 guide the movement of the locking portion 7200, the mating walls 7211 of the locking portion 7200 mate with the guide walls 7311 to enhance the guiding effect. When the locking portion 7200 is inserted into the locking groove 731, the two mating walls 7211 mate with the two guide walls 7311, respectively. The V-shaped arrangement of the two mating walls 7211 gives the locking portion 7200 a raised tooth-like shape, while the locking groove 731 has a tooth-like shape.

[0157] The locking assembly includes a fixing portion 730, which is fixedly connected to the operating assembly 810 (knob cover 820). A locking slot 731 is defined in the fixing portion 730. A plurality of locking slots 731 are formed and arranged around the rotation axis of the handle assembly 777. When the handle assembly 777 rotates to drive the jaw assembly 100 to rotate, the locking portion 7200 rotates with the handle assembly 777. The locking slots 731 are arranged around the rotation axis of the handle assembly 777 so that after the handle assembly 777 rotates, there is always a locking slot 731 corresponding to the locking portion 7200. Correspondence means that the locking portion 7200 can be inserted into the locking slot 731 after it moves toward the locking slot 731.

[0158] For example, the steering drive structure 700 further includes multiple shift positions, allowing the handle assembly 777 to have multiple rotational positions. The handle assembly 777 is connected to one shift position. In response to rotation of the handle assembly 777, the handle assembly 777 moves from a position connected to one shift position to a position connected to another shift position, thereby rotating the handle assembly 777 to a set angle. When the handle assembly 777 is connected to a shift position and is in the unlocked position, the locking portion 7200 corresponds to a locking groove 7310. When the handle assembly 777 is switched to the locked position, the locking portion 720 can smoothly engage with the locking groove 7310.

[0159] For example, the shift portion is a shift slot 732 (as shown in FIG29C ) provided on the fixing portion 730, and the transmission assembly includes a shift protrusion and a first elastic member 7621 (as shown in FIG26B ). The shift protrusion cooperates with the shift slot 732 to connect the handle assembly 777 to the shift portion. The shift protrusion is inserted into the shift slot 732 along the radial direction of the fixing portion 730 to cooperate with the shift slot. The first elastic member 7621 is connected to the shift protrusion and applies a force along the radial direction of the fixing portion 730 to the shift protrusion. When the medical staff does not apply force to the handle assembly 777 (operating handle 710), the shift protrusion is engaged with the shift slot 732. When a force is applied to the handle assembly 777 (operating handle 710), the force of the first elastic member 7621 causes the shift protrusion to engage with the shift groove 732, thereby locking the handle assembly 777 in the shift position. When the medical staff applies a rotational force to the handle assembly 777 (operating handle 710), the shift protrusion is subjected to a circumferential force along the fixing portion 730. Under the circumferential force, the shift protrusion disengages from the shift groove 732 and retracts radially inward to compress the first elastic member 7621. After moving to correspond to the adjacent shift groove 732, the first elastic member 7621 is released, causing the shift protrusion to move radially outward to engage with the shift groove 732. As a result, the handle assembly 777 is locked in the shift portion when not being operated, and can rotate relative to the shift portion when being operated.

[0160] As shown in Figure 29A, the gear protrusion is a fixed bead 764, and the gear slot 732 includes two guide walls, which are arranged in a V shape. The guide walls guide the fixed bead 764 to enter or exit the gear slot 732. When the transmission assembly rotates, it drives the fixed bead 764 to move from one gear slot 732 to the adjacent gear slot 732. For example, when the fixing bead 764 cooperates with the gear slot 732, it is located at the bottom of the gear slot 732. When the transmission assembly rotates, the fixing bead 764 moves circumferentially. At the same time, the fixing bead 764 moves in a direction away from the bottom of the gear slot 732 (radially inward) under the guidance of a guide wall, compressing the first elastic member 7621. When it passes through the guide wall and rotates to fit the guide wall of the adjacent gear slot 732, the first elastic member 7621 is released, causing the fixing bead 764 to move in the direction of the bottom of the adjacent gear slot 732 (radially inward and outward) under the guidance of the guide wall until it fits the bottom of the gear slot 732, thereby cooperating with the adjacent gear slot 732.

[0161] For example, the shift portion and the locking groove 7310 are arranged opposite to each other in the radial direction of the fixing portion 730 so that the shift portion and the locking groove 7310 can be arranged on the fixing portion 730 without crossing. Accordingly, the fixing bead 764 and the locking portion 7200 are arranged in the radial direction of the fixing portion 730.

[0162] For example, as shown in Figures 26A to 26B, the locking assembly also includes a second elastic member 7622, ​​one end of the second elastic member 7622 is connected to the first transmission member 760, and the other end is connected to the handle assembly 777. The second elastic member 7622 is arranged along the sliding direction of the handle assembly 777. When the handle assembly 777 is in the unlocked position, the second elastic member 7622 is compressed. When the handle assembly 777 is in the locked position, the second elastic member 7622 is released. The elastic force of the second elastic member 7622 keeps the handle assembly 777 in the locked position. For example, the handle assembly 777 can be moved along the axis of the cannula to switch from the locked position to the unlocked position. This can be done by moving distally along the axis of the cannula assembly 400 to switch to the unlocked position. Before the medical staff operates the handle assembly 777, the handle assembly 777 is in the locked position under the action of the second elastic member 7622. The medical staff applies a forward pushing force to the handle assembly 777 to cause the handle assembly 777 to move distally to the unlocked position. The second elastic member 7622 is compressed, maintaining the forward pushing force on the handle 800 while rotating the handle assembly 777, driving the jaw assembly 100 to rotate. After the rotation is completed, the medical staff releases the handle assembly 777, and the second elastic member 7622 is released, driving the handle assembly 777 to return 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 handle assembly 777, and the locking assembly can automatically switch and fix the handle assembly 777 in the locked position, automatically locking the jaw assembly 100 without the medical staff performing additional operations. When the handle assembly 777 is not pushed, the handle assembly 777 cannot be rotated, so that the medical staff cannot rotate the handle assembly 777 if they accidentally touch the handle assembly 777, so that the jaw assembly 100 will not rotate due to the medical staff's misoperation.

[0163] For example, the first transmission member 760 includes a transmission member body and an end member 761. The end member 761 is located within the sliding space and is fixedly connected to the transmission member body. As shown in Figures 8 and 10, the end member 761 is fixed to the transmission member body by screws 765. Specifically, the end member 761 is located at the distal end of the sliding space 763. Slide grooves 7612 are defined on both sides of the end member 761 in the width direction. The length of the slide grooves 7612 is the same as the length of the sliding space. The driving unit 720 includes two sliders 722, which are respectively inserted into the two slide grooves 7612 on both sides of the end member 761 to slideably connect the driving unit 720 and the end member 761. The handle assembly 777 is slidably connected to the first transmission member 760. When the handle assembly 777 is rotated to the left, the right portion of the slider 722 abuts against the bottom of the right slide groove 7612, driving the first transmission member 760 to rotate leftward. The same applies to rightward rotation. The end piece 761 is provided with a receiving groove 7611, which is a circular groove. The second elastic piece 7622 is connected to the end piece 761 and is partially received in the receiving groove 7611. The receiving groove 7611 limits the axial position of the second elastic piece 7622 to prevent the second elastic piece 7622 from deflecting or bending, and always provides elastic force along the length direction of the sliding space 763.

[0164] For example, the fixing bead 764 is arranged on the end piece 761 and is located on the side of the end piece 761 away from the driving part 720. For example, the first elastic piece 7621 and the second elastic piece 7622 are the same elastic piece, and the elastic piece is connected between the fixing bead 764 and the driving part 720. The fixing bead 764 and the locking part 7200 are arranged along the radial direction of the fixing part 730. For example, the elastic piece 762 is a compression spring, which can apply elastic force to both sides of the radial direction so that the fixing bead 764 is subjected to radial elastic force (towards the gear slot 732), and the locking part 7200 is subjected to radial elastic force (towards the locking slot 7310).

[0165] For example, as shown in Figures 1, 25, and 35B, the operating assembly 810 includes a knob cover 820. The proximal end of the cannula assembly 400 extends distally after passing through the knob cover 820. The cannula assembly 400 includes an outer cannula 420 and an inner cannula 410. For example, a medical professional can rotate the cannula assembly 400 and the jaw assembly 100 relative to the axis of the cannula assembly by rotating the knob cover 820. The fixed portion 730 of the steering drive structure 700 is fixedly mounted on the knob cover 820. The first transmission member 760 is disposed on the inner ring of the fixed portion 730. The gear assembly 740 is located below the first transmission member 760 and on both sides of the outer cannula 420. The push rod assembly 750 is slidably connected to the inner cannula 410 and is received by the outer cannula 420. The proximal end of the push rod assembly 750 is connected to the gear assembly 740.

[0166] For example, the operating assembly 810 further includes a handle 800 .

[0167] For example, the mating teeth 721 may also be referred to as locking portions 7200 .

[0168] For example, the handle assembly 777 includes an operating handle 710 and a driving portion 720. The operating handle 710 may also be referred to as an operating portion.

[0169] As shown in Figures 32 to 44, another embodiment of the present disclosure is similar to the above-mentioned embodiment, with the main difference being that, as shown in Figures 32 to 37, the mating portions 212 are disposed on the inner side of the angle steering member 210, arranged around the rotation axis of the angle steering member 210, and each mating portion 212 is located proximal to the rotation axis of the angle steering member 210. When the outer sleeve 420 moves from the proximal position to the distal position, it drives the locking member 300 to move proximally, switching the locking member 300 from the unlocked state to the locked state.

[0170] The surgical instrument further includes a motion conversion structure 500, through which the outer sleeve 420 is connected to the locking member 300. Similar to the transmission structure in the above-described embodiment, 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 via the rotating portion 512. The first connecting portion 513 and the second connecting portion 514 are both connected to the lever member 511 and are located on either side of the rotating portion 512. The outer sleeve 420 is connected to the first connecting portion 513, and the locking member 300 is connected to the second connecting portion 514. When the outer sleeve 420 drives the connecting portion to rotate in a first direction, the lever member 511 rotates about the rotating portion 512, causing the second connecting portion 514 to drive the locking member 300 to move in a second direction, the first direction being opposite to the second direction. For example, when the lever member 511 rotates, the first connecting portion 513 and the second connecting portion 514 rotate in opposite directions, for example, one to the left and the other to the right. The first connecting portion 513 and the second connecting portion 514 both move clockwise or counterclockwise, so that when the outer sleeve 420 moves distally, the motion conversion structure 500 drives the locking member 300 to move proximally. The proximal movement of the locking member 300 allows it to cooperate with the mating portion 212 to achieve rotational locking of the jaw assembly 100. When the outer sleeve 420 moves proximally, the motion conversion structure 500 drives the locking member 300 to move distally. The locking member 300 moves distally and separates from the mating portion 212 to release the rotational lock on the jaw assembly 100.

[0171] In response to movement of the outer sleeve 420 in a first direction, the locking element 300 moves in a 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 38 and 39, when the outer sleeve 420 moves proximally, the first connecting portion 513 rotates counterclockwise, and the second connecting portion 514 rotates counterclockwise, driving the locking element 300 to move distally. When the outer sleeve 420 moves distally, the first connecting portion 513 rotates clockwise, and the second connecting portion 514 rotates clockwise, driving the locking element 300 to move proximally.

[0172] The connection method between the first connecting portion 513 and the outer sleeve 420, and the connection method between the second connecting portion 514 and the locking member 300 are the same as those in the above embodiment (the matching portion is located on the far side of the rotation axis of the angle steering member), and will not be repeated here.

[0173] The locking member 300 switches from an unlocked state to a locked state by moving proximally. When the outer sleeve 420 is in the proximal position, the jaw assembly 100 is in an open state and the locking member 300 is in an unlocked state. In response to the rotation of the angle steering member, the jaw assembly 100 rotates relative to the sleeve assembly 400. At this time, the medical staff can control the rotation of the jaw assembly 100 through the operating assembly. When the outer sleeve 420 moves from the proximal position to the distal position, the jaw assembly 100 switches to a closed state, and the outer sleeve 420 drives the locking member 300 proximally through the motion conversion structure 500, causing the locking member 300 to switch from the unlocked state to the locked state. The locking member 300 locks the angle steering member, preventing it from rotating, thereby preventing the jaw assembly 100 from rotating relative to the sleeve assembly 400. The rotation of the jaw assembly 100 is locked while the jaw assembly 100 is closed, preventing the jaw assembly 100 from rotating and pulling the tissue when clamping.

[0174] Switching the outer sleeve 420 from the proximal position to the distal position, and switching the jaw assembly 100 from the open state to the closed state, is achieved in the following manner.

[0175] The angle steering member 210 defines a steering hole 213, and the ejector seat 411 is provided with a fixed shaft 4115. The angle steering member 210 is fixedly connected to the ejector seat 411 through the cooperation between the steering hole 213 and the fixed shaft 4115. The angle steering member 210 defines a groove 2111, which is located on the inner side of the wall portion. The mating portion 212 is disposed within the groove 2111, and the steering hole 213 communicates with the groove 2111. The locking member 300 includes a pull rod 310 and a locking portion 320. The pull rod 310 is connected to the lever member 511 at its proximal end and to the locking portion 320 at its distal end. The locking portion 320 includes a locking head 330 and a body 340, with the body 340 connected to the locking head 330. In the unlocked state, the locking head 330 is separated from the mating portion 212. After the jaw assembly 100 is turned, the medical staff operates the handle 800 to move the outer sleeve 420 toward the distal end, thereby closing the jaw assembly 100. When the outer sleeve 420 moves toward the distal end, the locking member 300 moves toward the proximal end, and the locking member 300 switches from the unlocked state to the locked state. At this time, the locking head 330 moves toward the proximal end in the steering hole 213, moves into the groove 2111 and engages with the corresponding mating portion 212, locking the angle steering member 210, and thereby realizing the rotational locking of the jaw assembly 100.

[0176] The matching portion 212 is provided on the inner side of the wall portion 211 . When the locking member 300 is in the unlocked state, the locking member 300 is unlocked from the matching portion 212 . When the locking member 300 moves proximally to the locked state, the locking member 300 is locked from the matching portion 212 .

[0177] As shown in Figures 2 and 6 to 8, the surgical instrument also includes a motion conversion structure 500 and a locking member 300. The sleeve assembly 400 includes an inner sleeve 410 and an outer sleeve 420. The outer sleeve 420 is sleeved outside the inner sleeve 410 and can move relative to the inner sleeve 410. The outer sleeve 420 is connected to the locking member 300 through the motion conversion structure 500. The outer sleeve 420 has a proximal position and a distal position.

[0178] In another embodiment, the motion conversion mechanism 500 includes a gear and two racks (not shown). The gear is rotatably mounted on the housing 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. For example, the first rack is connected to the outer sleeve 420, and the second rack is connected to the locking member 300. The outer sleeve 420 drives the first rack in a first direction, thereby driving the gear to rotate, which in turn drives the second rack 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 300 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 300 distally.

[0179] 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 locking member, wherein the angle steering member is rotatably connected to the sleeve assembly, the jaw assembly is connected to the angle steering member, and in response to the rotation of the angle steering member, the jaw assembly is configured to rotate relative to the sleeve assembly; The angle steering member has a wall portion and a mating portion, and the mating portion is arranged on the inner side of the wall portion; the locking member has an unlocked state and a locked state; when in the unlocked state, the locking member is separated from the mating portion, and the jaw assembly is configured to rotate relative to the sleeve assembly in response to the rotation of the angle steering member; when in the locked state, the locking member cooperates with the mating portion to prevent the jaw assembly from rotating relative to the sleeve assembly.

2. The surgical instrument according to claim 1, wherein: The rotation axis of the angle steering member is located on the inner side of the wall portion, the matching portion is arranged on the proximal side of the rotation axis, and the locking member moves proximally from the unlocking position to the locking position to achieve switching from the unlocking state to the locking state.

3. The surgical instrument according to claim 1 or 2, further comprising a motion conversion structure, wherein: The sleeve assembly includes an outer sleeve, the outer sleeve is connected to the jaw assembly, and the outer sleeve is connected to the locking member through the motion conversion structure. When the outer sleeve is located at the proximal position, the jaw assembly is in the open state, and the locking element is in the unlocked state; when the outer sleeve moves from the proximal position to the distal position, the outer sleeve drives the jaw assembly to switch from the open state to the closed state, and the outer sleeve drives the locking element to move proximally through the motion conversion structure to switch the locking element from the unlocked state to the locked state.

4. The surgical instrument according to claim 3, wherein: The motion conversion structure includes a lever member, a rotating part, a first connecting part and a second connecting part, wherein the lever member is connected to the rotating part and is rotatably connected to the frame through the rotating part, and the first connecting part and the second connecting part are both connected to the lever member and are located at two sides of the rotating part; The outer sleeve is connected to the first connecting part, and the locking member is connected to the second connecting part; when the outer sleeve moves along the first direction to drive the first connecting part to move, the lever member rotates around the rotating part, so that the second connecting part drives the locking member to move along the second direction, and the second direction is opposite to the first direction.

5. The surgical instrument according to claim 3, wherein: The motion conversion structure includes a gear, a first rack and a second rack. The first rack and the second rack are located on both sides of the gear and are meshed with the gear. The first rack is connected to the outer sleeve, and the second rack is connected to the locking member. When the outer sleeve drives the first rack to move along the first direction, the gear rotates to drive the second rack and the locking member to move along the second direction. The first direction is opposite to the second direction.

6. The surgical instrument according to claim 1, wherein: The rotation axis of the angle steering member is located on the inner side of the wall portion, the matching member is arranged on the far side of the rotation axis, and the locking member moves distally from the unlocking position to the locking position to achieve switching from the unlocking state to the locking state.

7. The surgical instrument according to claim 6, wherein: The sleeve assembly includes an outer sleeve connected to the locking member. The outer sleeve moves toward the distal end to drive the locking member to move toward the distal end, so that the locking member switches from the unlocking state to the locking state.

8. The surgical instrument according to claim 7, wherein: The surgical instrument further comprises a frame and a transmission structure, wherein the outer sleeve is connected to the locking member via the transmission structure; the transmission structure comprises a lever member, a rotating part, a first connecting part and a second connecting part, wherein the lever member is connected to the rotating part and is rotatably connected to the frame via the rotating part, wherein the first connecting part and the second connecting part are both connected to the lever member and are both located on the same side of the rotating part; The outer sleeve is connected to the first connecting part, and the locking member is connected to the second connecting part; when the outer sleeve moves along the first direction to drive the first connecting part to move, the lever member rotates around the rotating part, so that the second connecting part drives the locking member to move along the first direction.

9. The surgical instrument according to claim 8, wherein: A distance between the second connection portion and the rotating portion is smaller than a distance between the first connection portion and the rotating portion.

10. The surgical instrument according to claim 8 or 9, wherein: The first connecting portion is movably connected to the outer sleeve via a guide structure. When the outer sleeve moves along the first direction, the first connecting portion is driven to rotate around the rotating portion via the guide structure.

11. The surgical instrument according to any one of claims 8 to 10, wherein: The second connecting portion is movably connected to the locking member via a guide structure. When the second connecting portion rotates around the rotating portion, the locking member is driven to move along the first direction via the guide structure.

12. The surgical instrument according to claim 10 or 11, wherein: The guide structure includes a moving rod and a moving groove. The moving rod is movably disposed in the moving groove. The length direction of the moving groove is perpendicular or substantially perpendicular to the first direction.

13. The surgical instrument according to any one of claims 8 to 12, wherein: The first direction is the axial direction of the sleeve assembly.

14. The surgical instrument according to claim 1, wherein: The jaw assembly has an open state and a closed state, the sleeve assembly includes an outer sleeve, the outer sleeve is connected to the locking member, and the jaw assembly switches from the open state to the closed state when the outer sleeve moves toward the distal end; When the jaw assembly is in the open state, the locking element is in an unlocked state, and when the jaw assembly is in the closed state, the locking element is in a locked state.

15. The surgical instrument according to any one of claims 1 to 14, wherein: The angle turning member has a plurality of the matching portions, and the plurality of the matching portions are arranged around the rotation axis of the angle turning member. When the locking member is in a locked state, the locking member matches with at least one of the matching portions.

16. The surgical instrument according to claim 15, wherein: Among the matching parts, when the matching parts arranged at the head end and the tail end are engaged with the locking member, the angle between the extension line of the jaw assembly and the sleeve assembly is greater than or equal to 70°.

17. The surgical instrument according to any one of claims 1 to 16, wherein: One of the matching part and the locking piece is provided with a locking tooth, and the other one is provided with a matching groove, the locking tooth matches with the matching groove to lock the matching part and the locking piece; the locking tooth is separated from the matching groove to unlock the matching part and the locking piece.

18. The surgical instrument according to any one of claims 1 to 17, further comprising a steering drive assembly, wherein: When the steering drive assembly is operated, it drives the angle steering member to rotate so as to adjust the angle between the jaw assembly and the sleeve assembly.

19. The surgical instrument of claim 18, wherein: The steering drive assembly includes: an operating handle, a gear assembly and a push rod, the operating handle is connected to the gear assembly, the push rod is provided with connecting teeth, and the connecting teeth are engaged with the gear assembly; when the operating handle is rotated, the gear assembly is driven to rotate, and in response to the rotation of the operating handle, the gear assembly is configured to rotate and drive the push rod to move, and the push rod is configured to drive the angle steering member to rotate when moving.

20. The surgical instrument of claim 19, wherein: The steering drive assembly also includes: a driving part, an elastic locking piece and a fixing part, the operating handle is connected to and drives the gear assembly through the driving part, the fixing part has a locking tooth, the driving part has a matching tooth, and the driving part is connected to the elastic locking piece; when the driving part is in a locked position, the elastic locking piece is in an initial state, the matching tooth is engaged with the locking tooth, and the rotation of the driving part is prevented; when the driving part is in an unlocked position, the elastic locking piece is in a compressed state, the matching tooth is separated from the locking tooth, and the driving part can rotate to drive the push rod to move through the gear assembly.

21. The surgical instrument according to any one of claims 1 to 18, wherein: The jaw assembly includes a nail magazine seat and a nail anvil seat rotatably connected to the nail magazine seat. The surgical instrument also includes a motion conversion mechanism. The outer sleeve is connected to the nail anvil seat through the motion conversion mechanism. The motion conversion mechanism includes a first driving member and a first driving member provided on the outer sleeve, and a first driven part and a second driven part provided on the nail anvil seat. When the outer sleeve is located at the proximal position, the first driving member is matched with the first driven part to make the jaw assembly in an open state; when the outer sleeve moves from the proximal position to the distal position, the first driving member is separated from the first driven part, and the first driving member is matched with the second driven part to make the nail anvil seat pivot, thereby making the jaw assembly in a closed state.

22. The surgical instrument according to any one of claims 1 to 21, further comprising a steering drive structure, wherein: The steering drive structure comprises a handle assembly, a locking assembly, and a transmission assembly, wherein the handle assembly is connected to the angle steering member through the transmission assembly, and in response to the rotation of the handle assembly, the transmission assembly is configured to drive the angle steering member to rotate, thereby driving the jaw assembly to rotate relative to the sleeve assembly; the handle assembly has a locking position locked with the locking assembly and an unlocking position unlocked with the locking assembly; The handle assembly includes a locking portion, the locking assembly includes a locking groove, and when the handle assembly is in the unlocking position, the locking portion is separated from the locking groove; When the handle assembly is in the locking position, the locking portion is inserted into the locking groove; The locking groove is provided with a guide wall, and when the handle assembly is switched from the unlocking position to the locking position, the locking portion is plugged into the locking groove under the guidance of the guide wall.

23. The surgical instrument of claim 22, wherein: The locking groove includes two guide walls, which are arranged in a V shape; the locking portion includes two matching walls, and when the locking portion is inserted into the locking groove, the two matching walls are respectively fitted with the two guide walls.

24. The surgical instrument according to claim 22 or 23, wherein: The locking assembly includes a fixing portion, the locking groove is arranged in the fixing portion, there are a plurality of locking grooves, and the plurality of locking grooves are arranged around the rotation axis of the handle assembly.

25. The surgical instrument of claim 24, wherein: The steering drive structure also includes multiple gear parts. When the handle assembly is in the locked position, the handle assembly is connected to one of the gear parts. When the handle assembly is in the unlocked position, in response to the rotation of the handle assembly, the handle assembly is configured to move from a position connected to one of the gear parts to a position connected to another of the gear parts, and the locking part is configured to move from a position corresponding to one of the locking grooves to a position corresponding to another of the locking grooves.

26. The surgical instrument of claim 25, wherein: The shift portion is a shift slot opened in the fixed portion, the transmission assembly includes a shift protrusion and a first elastic member, the shift protrusion cooperates with the shift slot to connect the handle assembly with the shift portion, the first elastic member is connected to the shift protrusion and applies a force along the radial direction of the fixed portion to the first elastic member, in response to the rotation of the handle assembly, the shift protrusion is configured to disengage from one of the shift slots and enter an adjacent shift slot under the action of the first elastic member.

27. The surgical instrument of claim 26, wherein: The shift position protrusion is a fixing bead, and the shift position groove includes a guide wall, and the guide wall guides the fixing bead to enter and leave the shift position groove.

28. The surgical instrument according to any one of claims 25 to 27, wherein: The shift portion and the locking groove are arranged opposite to each other in the radial direction of the fixing portion.

29. The surgical instrument according to any one of claims 22 to 28, wherein: The transmission assembly includes a first transmission member, a second transmission member and a push rod assembly, the first transmission member is connected to the second transmission member, and the second transmission member is connected to the angle steering member through the push rod assembly; the handle assembly is movably connected to the first transmission member, and when the handle assembly is operated, it moves relative to the first transmission member to switch from the locked position to the unlocked position or from the unlocked position to the locked position; when the handle assembly is in the unlocked position, in response to the rotation of the handle assembly, the first transmission member is configured to drive the push rod assembly to move through the second transmission member, thereby driving the angle steering member to rotate.

30. The surgical instrument of claim 29, wherein: The second transmission member includes a gear assembly, the first transmission member is meshed with the gear assembly, and the gear assembly is meshed with the push rod assembly. In response to the rotation of the handle assembly, the first transmission member is configured to drive the gear assembly to rotate, thereby driving the push rod assembly to move toward the distal end or the proximal end.

31. The surgical instrument according to any one of claims 22 to 30, wherein: The handle assembly is movably connected to the transmission assembly, and when the handle assembly is operated, it moves relative to the transmission assembly to switch from the locked position to the unlocked position or from the unlocked position to the locked position; the locking assembly includes a second elastic member, one end of the second elastic member is connected to the transmission assembly, and the other end is connected to the handle assembly, the second elastic member is arranged along the moving direction of the handle assembly, when the handle assembly is in the unlocked position, the second elastic member is compressed, and when the handle assembly switches from the unlocked position to the locked position, the second elastic member is released, driving the handle assembly and the locking portion to move toward the locking groove.

32. The surgical instrument according to any one of claims 1 to 31, wherein: The angle turning member is annular and has a turning hole, and the side of the angle turning member close to the turning hole is the inner side.

Images