Surgical instrument

Abstract

The utility model relates to a surgical instrument which comprises a machine body, a percussion handle rotatably arranged on the machine body and a locking assembly, the locking assembly comprises an operation piece, a locking piece arranged on the machine body and a transmission part connected with the operation piece, and the percussion handle is provided with a second release position and a second closing position; the locking piece is provided with a locking position and an unlocking position; in the locking position, the locking piece is configured to prevent the firing handle from moving from the second release position to the second closed position; when the locking piece is located at the unlocking position, in response to the fact that the percussion handle is operated, the percussion handle moves to the second closing position from the second releasing position; and the transmission part is in transmission connection with the locking piece, and the transmission part moves to drive the locking piece to move from the locking position to the unlocking position in response to the operation of the operating piece. The operation piece can be arranged at any position of the machine body, and the position arrangement of the operation piece can more accord with ergonomics, so that a user can operate the operation piece more conveniently and comfortably.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a surgical instrument. BACKGROUND

[0002] Surgical cutting stapler is a commonly used medical instrument to replace manual suture, the main working principle is to use cutting knife to disconnect the tissue and use titanium nail to anastomose the tissue, similar to a stapler. According to the different parts of the body, it can be divided into various staplers. The working principle of surgical cutting stapler is to enter the patient's body through the sleeve of the puncture device positioned at the surgical site, then make a longitudinal incision in the tissue and apply anastomosis nails on the opposite sides of the incision, thereby disconnecting and anastomosing the tissue. SUMMARY

[0003] The scheme of the present disclosure is realized by the following ways:

[0004] A surgical instrument, comprising a body, a firing handle rotatably arranged on the body, a locking assembly, the locking assembly comprising an operating member, a locking member arranged on the body and a transmission part connected with the operating member, the firing handle having a second release position and a second closing position;

[0005] The locking member has a locking position and an unlocking position; in the locking position, the locking member is configured to block the movement of the firing handle from the second release position to the second closing position; when the locking member is in the unlocking position, the firing handle is moved from the second release position to the second closing position in response to the operation of the firing handle;

[0006] The transmission part is in transmission connection with the locking member, and the transmission part moves to drive the locking member to move from the locking position to the unlocking position in response to the operation of the operating member.

[0007] In one embodiment, the transmission part comprises a transmission rod, one end of the transmission rod is connected to the operating member, and the other end of the transmission rod is connected to the locking member; in response to the operation of the operating member, the transmission rod rotates to drive the locking member to move from the locking position to the unlocking position.

[0008] In one embodiment, the locking member comprises a movement part, the movement part is rotatably arranged on the body, and the transmission rod is in transmission connection with the movement part; in response to the operation of the operating member, the transmission rod rotates to drive the movement part to rotate to make the locking member move from the locking position to the unlocking position.

[0009] In one embodiment, the locking member further comprises a receiving portion connected to the moving portion, the receiving portion abutting against the transmission rod so that the transmission rod is in transmission connection with the moving portion; in response to the rotation of the transmission rod, the receiving portion drives the moving portion to rotate.

[0010] In one embodiment, the operating member is rotatably arranged on the housing of the machine body, and the locking member is rotatably arranged on the machine body, the rotation axis of the locking member being staggered with the rotation axis of the operating member.

[0011] In one embodiment, the surgical instrument further comprises a closure handle rotatably arranged on the machine body, the closure handle having a first release position and a first closed position; the path of the firing handle from the second release position to the second closed position is a first path;

[0012] the path of the locking member from the locking position to the unlocking position is an unlocking path; the closure handle comprises a limiting portion having a first limiting position and a second limiting position; the locking assembly has a first locking state, a second locking state and an unlocking state; when the locking assembly is in the first locking state, the closure handle is in the first release position, the limiting portion is in the first limiting position, and the locking member is in the locking position; the limiting portion in the first limiting position is at least partially located in the unlocking path to block the movement of the locking member from the locking position to the unlocking position; in response to the movement of the closure handle from the first release position to the first closed position, the limiting member moves from the first limiting position to the second limiting position, and the locking assembly switches from the first locking state to the second locking state; when the locking assembly is in the second locking state, the closure handle is in the first closed position, the limiting portion is in the second limiting position, and the locking member is in the locking position; the limiting portion in the second limiting position is away from the unlocking path; in the locking position, the locking member is at least partially located in the first path to block the movement of the firing handle from the second release position to the second closed position; in response to the operation of the operating member, the transmission portion drives the locking member to move from the locking position to the unlocking position to be away from the first path.

[0013] In one embodiment, during movement of the firing handle from the second release position to the second closed position, the firing handle moves along a first path; the lock comprises a blocking portion and a moving portion connected to the blocking portion, the moving portion is rotatably connected to the body, the operating member is connected to the moving portion, when the lock is in the locked position, at least a portion of the blocking portion is located in the first path, the blocking portion is configured to block the firing handle located in the first path; in response to driving the moving portion to rotate by the operating member, the moving portion drives the blocking portion to rotate away from the first path to move the lock from the locked position to an unlocked position.

[0014] In one embodiment, the moving portion comprises a central rotating portion and a half-ring portion connected to the central rotating portion, the half-ring portion is arranged around the central rotating portion, the blocking portion is arranged at one end of the half-ring portion, and the blocking portion and the other end of the half-ring portion enclose a gap; when the lock is in the locked position, at least a portion of the blocking portion is located in the first path to block the firing handle located in the first path; when the lock is in the unlocked position, the blocking portion is away from the first path and at least a portion of the gap is located in the first path to avoid the firing handle moving along the first path. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of a surgical instrument of an embodiment of the present disclosure;

[0016] Figure 2 is a structural schematic diagram of a lock assembly in a first locked state of an embodiment of the present disclosure;

[0017] Figure 3 is an internal structural schematic diagram of a lock assembly in a first locked state of an embodiment of the present disclosure;

[0018] Figure 4 is a structural schematic diagram of a firing handle in a second release position and a second closed position of an embodiment of the present disclosure;

[0019] Figure 5 is Figure 3 is a structural schematic diagram of A in FIG. 4;

[0020] Figure 6 is a structural schematic diagram of a lock assembly in a second locked state of an embodiment of the present disclosure;

[0021] Figure 7 is an internal structural schematic diagram of a lock assembly in a second locked state of an embodiment of the present disclosure;

[0022] Figure 8is a structure diagram of a locking assembly in an unlocked state according to an embodiment of the present disclosure;

[0023] Figure 9 is a structure diagram of an internal structure of a locking assembly in an unlocked state according to an embodiment of the present disclosure;

[0024] Figure 10a is Figure 9 is a structure diagram of a position A in FIG. 6;

[0025] Figure 10b is a structure diagram of a locking assembly in a locked state and an unlocked state according to an embodiment of the present disclosure;

[0026] Figure 11 is an exploded view of an operating member and a moving part according to an embodiment of the present disclosure;

[0027] Figure 12 is an exploded view of an operating member and a moving part according to an embodiment of the present disclosure;

[0028] Figure 13 is Figure 3 is a structure diagram of a position A in FIG. 6;

[0029] Figure 14 is a structure diagram of a moving part and a limiting part according to another embodiment of the present disclosure;

[0030] Figure 15 is a structure diagram of a moving part movably connected to a body according to an embodiment of the present disclosure;

[0031] Figure 16 is a structure diagram of an operating member being operated according to an embodiment of the present disclosure;

[0032] Figure 17 is a structure diagram of a limiting member in a second limiting position and a locking member in a locked position according to an embodiment of the present disclosure;

[0033] Figure 18 is a structure diagram of a locking member in an unlocked position according to an embodiment of the present disclosure;

[0034] Figure 19 is a structure diagram of a closing handle in a first releasing position according to an embodiment of the present disclosure;

[0035] Figure 20a is Figure 19 is a structure diagram of a position C in FIG. 6;

[0036] Figure 20b is a structure diagram of a stop according to an embodiment of the present disclosure;

[0037] Figure 20cis a structural schematic view of the stop portion in an embodiment of the present disclosure;

[0038] Figure 21 is a structural schematic view of the closure handle in a first closed position in an embodiment of the present disclosure;

[0039] Figure 22 is Figure 21 is a structural schematic view at D;

[0040] Figure 23 is a structural schematic view of the locking assembly in an unlocked state in an embodiment of the present disclosure;

[0041] Figure 24 is Figure 18 is a structural schematic view at E;

[0042] Figure 25 is a structural schematic view of the operating member in still another embodiment of the present disclosure;

[0043] Figure 26 is a structural schematic view of the surgical instrument in still another embodiment of the present disclosure;

[0044] Figure 27 is a structural schematic view of the closure handle in a first closed position in still another embodiment of the present disclosure;

[0045] Figure 28 is Figure 27 is a structural schematic view at F;

[0046] Figure 29 is a structural schematic view of the locking assembly in an unlocked state in an embodiment of the present disclosure;

[0047] Figure 30 is Figure 29 is a structural schematic view at G.

[0048] wherein:

[0049] 100, body; 110, sleeve assembly; 111, outer sleeve; 120, jaw assembly; 130, handle; 140, guide portion; 141, positioning column; 142, stop surface; 143, abutting surface; 150, moving groove;

[0050] 200, closure handle; 210, handle portion; 230, plate body portion; 240, limiting portion; 241, limiting groove; 242, first end portion; 243, side groove wall; 244, second end portion;

[0051] 300, firing handle; 310, acting portion; 320, body portion;

[0052] 400, locking assembly; 410, operating member; 411, transmission part; 412, square slot; 413, gasket; 414, connecting part; 415, first accommodating slot; 416, second accommodating slot; 417, communicating slot;

[0053] 401, locking member;

[0054] 420, moving part; 421, central rotating part; 422, half ring part; 424, notch; 425, square protrusion; 430, blocking part; 431, blocking surface; 440, abutting part; 450, receiving part;

[0055] 500, jaw opening assembly; 510, locking rod; 520, unlocking button;

[0056] 600, back-knife member;

[0057] 700, connecting rod. DETAILED DESCRIPTION

[0058] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, further detailed description will be made to the present disclosure with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and not used to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present disclosure.

[0059] It should be understood that the terms "proximal" and "distal" used herein are relative to the clinician who manipulates the surgical instrument. 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 proximal, and the jaw assembly is distal, and the proximal end of a certain part means the end relatively close to the handle, and the distal end means the end relatively close to the jaw assembly. However, the surgical instrument can be used in many directions and positions, so these terms expressing relative positional relationship are not limited and absolute.

[0060] In the present disclosure, unless otherwise explicitly specified and limited, the term "connection" and the like should be understood broadly, for example, it can be fixedly connected, or detachably connected, or movably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship such as abutment between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present disclosure according to the specific circumstances. It should be noted that when the "connection" is limited by a modifier, it has the meaning limited by the corresponding modifier, and only the obviously excluded cases are excluded, and other possible cases are not excluded.

[0061] The present disclosure relates to a surgical instrument, which can be a stapler, such as Figure 1 As shown, the surgical instrument includes a body 100, a sleeve assembly 110 connected to the body 100, a jaw assembly 120 connected to the body 100, a cutting knife assembly (not shown), a closure handle 200 rotatably disposed on the body 100, and a firing handle 300 rotatably disposed on the body 100. The sleeve assembly 110 includes an inner sleeve (not shown) and an outer sleeve 111, the jaw assembly 120 is connected to the outer sleeve 111, and the closure handle 200 is in driving connection with the outer sleeve 111. The closure handle 200 has a first release position and a first closure position. As shown, when the surgical instrument is not in use, the closure handle 200 is in the first release position, and the jaw assembly 120 is in an open state. As shown, when a user needs to close the jaw assembly 120, the closure handle 200 is pressed to move the closure handle 200 from the first release position to the first closure position. The movement of the closure handle 200 drives the outer sleeve 111 to move distally, and the distally moving outer sleeve 111 drives the jaw assembly 120 to switch from the open state to a closed state. The closure handle 200 remains in the first closure position after reaching the first closure position. The structure of the closure handle 200 remaining in the first closure position is described below. Figure 2 Figure 6 As shown, when a user needs to close the jaw assembly 120, the closure handle 200 is pressed to move the closure handle 200 from the first release position to the first closure position. The movement of the closure handle 200 drives the outer sleeve 111 to move distally, and the distally moving outer sleeve 111 drives the jaw assembly 120 to switch from the open state to a closed state. The closure handle 200 remains in the first closure position after reaching the first closure position. The structure of the closure handle 200 remaining in the first closure position is described below.

[0062] The firing handle 300 is in driving connection with the cutting knife assembly, and the specific implementation structure is described below. The firing handle 300 has a second release position and a second closure position. The cutting knife assembly includes a knife head (not shown), which is located in the jaw assembly 120 and clamps tissue when the jaw assembly 120 is in the closed state. A user can press the firing handle 300 to move the firing handle 300 from the second release position to the second closure position. The above movement of the firing handle 300 drives the cutting knife assembly to fire, where firing means that the cutting knife assembly moves distally, so that the knife head located in the jaw assembly 120 moves distally to cut the tissue clamped in the jaw assembly 120. The surgical instrument further includes a knife return assembly and a jaw opening assembly. After the knife head moves distally to a limit position, a user operates the knife return assembly to move the cutting knife assembly proximally to an initial position before firing. At this time, the user can operate the jaw opening assembly 500 to open the jaw assembly 120, and then move the closure handle 200 from the first closure position to the first release position. The specific way in which the cutting knife assembly returns to the initial position before firing and the structure of the jaw opening assembly 500 are described below.

[0063] ​In actual operation, the doctor may need to make an adjustment, such as changing the clamping position, before controlling the cutting knife assembly to cut the clamped tissue after operating the jaw assembly 120 to close the clamped human tissue. That is, when the jaw assembly 120 is in the closed state, the appropriate firing time may not have arrived. At this time, if the doctor accidentally triggers the firing handle 300 during operation, the cutting knife assembly may be fired, cutting the tissue that is not expected to be cut, resulting in a surgical failure.

[0064] In one solution of the prior art, a locking structure is arranged on the machine body 100 to limit the closing of the firing handle 300 to avoid accidental operation of closing the firing handle 300, and the locking structure and the firing handle 300 are both provided with tooth structure, and the two are matched through the tooth structure. When firing is needed, the locking structure is operated to rotate to disengage from the position matched with the firing handle 300, but because the locking structure and the firing handle 300 are matched through the tooth, the locking structure is easy to be stuck by the tooth structure when rotating, and the locking structure is not easy to disengage from the cooperation with the firing handle 300, which is easy to cause unlocking failure, and the user needs to operate multiple times to remove the closing restriction of the locking structure on the firing handle 300.

[0065] As shown in Figure 2 and Figure 3 The surgical instrument in the present disclosure includes a locking assembly 400, which includes an operating member 410 arranged on the machine body 100, a locking member 401 connected with the operating member 410, and a limiting portion 240 connected with the closing handle 200; during the movement of the firing handle 300 from the second release position to the second closed position, the firing handle 300 moves along a first path; as shown in Figure 4 During the above process, the firing handle 300 rotates around its own rotation axis, wherein the movement trajectory of the firing handle 300 from the second release position to the second closed position is the first path (wherein the solid line is the second release position and the dashed line is the second closed position).

[0066] The locking assembly 400 has a locked state and an unlocked state. When the locking assembly 400 is in the locked state, the locking member 401 is in a locked position. In the locked position, the locking member 401 is at least partially located in the first path. The locking member 401 in the locked position is configured to resist the firing handle 300 located in the first path, thereby blocking the movement of the firing handle 300 from the second release position to the second closed position. Resisting the firing handle 300 located in the first path means that the locking member 401 in the locked position resists the firing handle 300 located in the second release position to block the movement of the firing handle 300, or the locking member 401 in the locked position is separated from the firing handle 300 located in the second release position. In response to the movement of the firing handle 300 along the first path, the locking member 401 resists the firing handle 300 moving along the first path. When the locking assembly 400 is in the unlocked state, the locking member 401 is in an unlocked position. In the unlocked position, the locking member 401 is away from the first path, where away means that the locking member 401 is not located in the first path. That is, the locking member 401 in the unlocked position does not block the movement of the firing handle 300 along the first path. In response to the operation of the firing handle 300 by the user, the firing handle 300 moves from the second release position to the second closed position.

[0067] The path of the locking member 401 moving from the locked position to the unlocked position is an unlocking path. In the unlocking path, Figure 10b The solid line in FIG. 4 shows the locking member 401 in the locked position, and the dashed line shows the locking member 401 in the unlocked position. When the locking assembly 400 is in the locked state and the closure handle 200 is in the first release position, the limiting portion 240 is located in a first limiting position. The limiting portion 240 located in the first limiting position is at least partially located in the unlocking path, thereby blocking the movement of the locking member 401 from the locked position to the unlocked position.

[0068] When the locking assembly 400 is in the locked state and the closure handle 200 is in the first closed position, the limiting portion 240 is located in a second limiting position. The limiting portion 240 located in the second limiting position is away from the unlocking path, where away means that the limiting portion 240 is not located in the unlocking path. In response to the operation of the locking member 401, the locking member 401 moves from the locked position to the unlocked position, thereby switching the locking assembly 400 from the locked state to the unlocked state.

[0069] When the locking assembly 400 is in the locked state, the locking member 401 in the locked position blocks the firing handle 300 located in the first path, so that the firing handle 300 cannot be operated to close, thereby preventing the cutting knife assembly from cutting the tissue to avoid undesired cutting of the tissue. When the locking assembly 400 is in the unlocked state, the locking member 401 in the unlocked position is away from the first path, so that the firing handle 300 can move along the first path, thereby enabling the firing handle 300 to be operated to close, and the cutting knife assembly can cut the tissue.

[0070] In the locked state, the lock 401 blocks the movement of the firing handle 300 by abutting against the firing handle 300 located in the first path. When the lock 401 moves from the locked position to the unlocked position, the lock 401 is away from the firing handle 300 and no longer abuts against the firing handle 300 located in the first path. The lock 401 abuts against the firing handle 300 located in the first path in a way that limits the movement of the firing handle 300, so that the lock 401 can move from the locked position to the unlocked position relative to the firing handle 300 smoothly, avoiding the situation that the lock 401 fails to move to the unlocked position and the lock 401 fails to unlock.

[0071] When the surgical instrument is not used, the closure handle 200 is in the first release position, the firing handle 300 is in the second release position, the lock assembly is in the locked state, and the jaw assembly 120 is in the open state. At this time, the lock 401 is in the locked position, and the limiting portion 240 is in the first limiting position, limiting the movement of the lock 401 from the locked position to the unlocked position. In this case, the user cannot operate the operating member 410, and the lock 401 cannot move to the unlocked position, i.e., the lock 401 cannot be unlocked when the jaw assembly 120 is not closed, avoiding the situation that the lock assembly 400 is prematurely in the unlocked state and cannot limit the movement of the firing handle 300 after the jaw assembly 100 is subsequently closed. When the lock 401 is in the locked position and the closure handle 200 is in the first closed position, i.e., when the jaw assembly 120 is closed, the limiting portion 240 is in the second limiting position, and the operating member 410 can be operated by the user to switch the lock assembly 400 to the unlocked state, thereby releasing the limitation of the firing handle 300.

[0072] For example, the locked state includes a first locked state and a second locked state. When the lock 401 is in the locked position and the closure handle 200 is in the first release position, the lock assembly 400 is in the first locked state. When the lock 401 is in the locked position and the closure handle 200 is in the first closed position, the lock assembly 400 is in the second locked state. During the use of the surgical instrument, the lock assembly 400 is switched from the first locked state to the second locked state, and then from the second locked state to the unlocked state.

[0073] The locking member 401 comprises a blocking portion 430 and a moving portion 420 connected with the blocking portion 430, the moving portion 420 is movably connected with the body 100, and the operating member 410 is connected with the moving portion 420. When the locking member 401 is in the locking position, at least a part of the blocking portion 430 is located in the first path and abuts against the firing handle 300 located in the first path to limit the movement of the firing handle 300. When the locking member 401 is in the unlocking position, the blocking portion 430 is away from the first path and does not abut against the firing handle 300 located in the first path, so that the firing handle 300 can move smoothly from the second release position to the second closed position.

[0074] When the locking member 401 is in the locking position and the closure handle 200 is in the first closed position, the moving portion 420 moves relative to the body 100 in response to the operating member 410 being operated, and the moving moving portion 420 drives the blocking portion 430 to move, so that the locking member 401 moves from the locking position to the unlocking position.

[0075] In one embodiment, as shown in Figure 7 to Figure 10a the moving portion 420 is rotatably connected with the body 100, the operating member 410 is connected with the moving portion 420, and the rotation of the operating member 410 relative to the body 100 can drive the moving portion 420 to rotate relative to the body 100.

[0076] When the locking assembly 400 is in the second locking state, i.e., the locking member 401 is in the locking position and the closure handle is in the first closed position, the operating member 410 drives the moving portion 420 to rotate in response to the operating member 410 being operated, the moving portion 420 drives the blocking portion 430 to rotate, so that the blocking portion 430 is away from the first path, and the locking member 401 moves from the locking position to the unlocking position.

[0077] The unlocking path of the locking member 401 is the movement path of the locking member 401 when the locking member 401 rotates around the rotation axis of the moving portion 420. In one embodiment, as shown in Figure 10a to Figure 12As shown, the moving part 420 includes a center rotating part 421 and a semi-ring part 422 connected to the center rotating part 421, the semi-ring part 422 is arranged around the center rotating part 421, and the semi-ring part 422 is fixedly connected to the center rotating part 421 or integrally formed. The semi-ring part 422 is an incomplete ring, and the ring can be a superior arc, an inferior arc, or a semicircle. The blocking part 430 is arranged at one end of the semi-ring part 422, and the other end of the semi-ring part 422 and the blocking part 430 form a gap 424 in the circumferential direction of the center rotating part 421. When the locking member 401 is in the locked position, the blocking part 430 is located in the first path, and the gap 424 is away from the first path, so that the locking member 401 can block the firing handle in the first path through the blocking part 430; when the locking member 401 is in the unlocked position, the blocking part 430 is away from the first path, and at least part of the gap 424 is located in the first path, so that the locking member 401 can avoid the firing handle 300 in the first path through the gap 422. Thus, the locking assembly 400 in the unlocked state will not block the firing handle 300 moving along the first path. In an embodiment, as shown, the blocking part 430 includes a blocking surface 431, for example, an arc-shaped blocking surface 431, which is configured to be at least partially located in the first path when the locking member 401 is in the locked position, and the blocking part 430 blocks the firing handle 300 moving along the first path through the blocking surface 431; for example, when the firing handle 300 is in the second release position, the blocking surface 431 abuts the firing handle 300 to block the firing handle 300 moving along the first path, and for another example, when the firing handle 300 is in the second release position, the blocking surface 431 is separated from the firing handle 300, and in response to the firing handle 300 moving along the first path, the blocking surface 431 abuts the firing handle 300 to block the firing handle 300 moving along the first path. When the locking assembly 400 is in the unlocked state, the blocking surface 431 is away from the first path, so that the firing handle 300 can move along the first path, and thus the firing handle 300 can move from the second release position to the second closing position. The blocking surface 431 can also have other shapes. Figure 13

[0078] ​The setting of the blocking part 430 further improves the stability of the locking member 401 remaining in the locking position. When the locking assembly 400 is in the locked state, if the user presses the firing handle 300 intending to move the firing handle 300 from the second release position to the second closed position. The blocking part 430 abuts against the firing handle 300 to block the movement of the firing handle 300. The user presses the firing handle 300 to apply a force to the blocking part 430, but the movement track of the blocking part 430 is arc-shaped, and the force applied by the firing handle 300 to the blocking part 430 cannot make it move in an arc shape, so that the blocking part 430 is not easy to move out of the locking position. That is, the setting of the blocking part 430 makes the locking member 401 better remain in the locking position when the locking assembly 400 is in the locked state and the firing handle 300 is accidentally pressed.

[0079] The arc-shaped setting of the blocking surface 431 enables the locking member 401 to smoothly move from the locking position to the unlocking position. When the locking assembly 400 is in the locked state, the firing handle 300 contacts the blocking part 430 or the blocking part 430 is spaced apart from the firing handle 300 in the first path. The blocking surface 431 is arranged along the first arc line, that is, the first arc line contacts or is spaced apart from the firing handle 300. For example, the center of the blocking surface 431 coincides with the rotation axis of the moving part 420. When the locking member 401 moves from the locking position to the unlocking position, the locking member 401 moves along the unlocking path, the blocking surface 431 rotates around the rotation axis of the moving part 420, the blocking surface 431 rotates along the first arc line, and the blocking surface 431 rotating along the first arc line does not interfere with the firing handle 300, so that the firing handle 300 does not interfere with the locking member 401 moving along the unlocking path, further enabling the locking member 401 to smoothly move from the locking position to the unlocking position.

[0080] For example, the rotation axis of the moving part 420 coincides with the rotation axis of the closure handle 200. The closure handle 200 comprises a handle part 210 and a rotation shaft 220, the rotation shaft 220 is arranged along a first rotation axis K1, and the closure handle 200 rotates around the first rotation axis K1 when the user operates the closure handle 200. For example, both ends of the rotation shaft 220 are matched with the body 100, and the rotation shaft 220 penetrates the handle part 210 so that the handle part 210 can rotate around the rotation shaft 220. The rotation axis of the moving part 420 coincides with the first rotation axis K1, for example, the moving part 420 is rotatably connected with the rotation shaft 220, for example, the moving part 420 is sleeved on the rotation shaft 220, and when the operating member 410 rotates, it drives the moving part 420 to rotate relative to the rotation shaft 220. The rotation shaft 220 is used to define the rotation axis of the moving part 420 to stabilize the position of the moving part 420.

[0081] When the closure handle 200 is switched between the first release position and the first closure position, the handle portion 210 rotates around the first rotation axis K1, and the rotation axis 220 does not rotate and move, so the movement portion 420 does not move or rotate due to the rotation of the closure handle 200, so that the locking member 401 can be stably kept in the locking position when the closure handle 200 is switched between the first release position and the first closure position.

[0082] In one embodiment, as shown in Figure 7 The closure handle 200 further includes a plate body portion 230 connected to the handle portion 210, the handle portion 210 is used for user operation, and the plate body portion 230 is located above the handle portion 210 and is used to act on the closure mechanism to drive the jaw assembly 120 to close. The specific structure of the closure mechanism is described below. For example, the limiting portion 240 is fixedly arranged on the plate body portion 230. For example, as shown in Figure 7 and Figure 12 In the thickness direction of the plate body portion 230, the plate body portion 230 and the firing handle 300 are staggered with each other, that is, the firing handle 300 and the closure handle 200 are at least partially stacked, which can make the internal mechanism of the body 100 more compact. The blocking portion 430 is protrudingly arranged along the thickness direction of the plate body portion 230, and the blocking portion 430 is opposite to the firing handle 300, so that the blocking portion 430 can block the firing handle 300 located in the first path.

[0083] In another embodiment, as shown in Figure 14 to Figure 17 The movement portion 420 is movably arranged in the body, and the operating member 410 is connected to the movement portion 420 and movably arranged on the outer surface of the body. When the closure handle 200 is in the first closure position and the locking member 401 is in the locking position, the movement portion 420 moves relative to the body 100 in response to the operating member 410 being operated to move, and the blocking portion 430 is moved to make the blocking portion 430 leave the first path, so that the locking member 401 moves from the locking position to the unlocking position, Figure 18 The locking member is in the unlocking position.

[0084] For example, as shown in Figure 16As shown, the body 100 is provided with a moving groove 150, and the moving groove 150 is a through groove. The operating member 410 cooperates with the moving groove 150 and can slide along the length direction of the moving groove 150. The operating member 410 penetrates the moving groove 150 and enters the body 100, and is fixedly connected with the moving part 420, so that the operating member 410 can drive the moving part 420 to move. When the operating member 410 is in the locking position, the operating member 410 is located at one end of the moving groove 150. In response to the operating member 410 moving to the other end of the moving groove 150 along the length direction of the moving groove 150, the operating member 410 moves from the locking position to the unlocking position. During the above process, the locking member 401 moves away from the firing handle 300 to leave the first path.

[0085] For example, the locking member 401 moves with the operating member 410 from Figure 17 to Figure 18 . The dashed line in FIG. 17 is the unlocking path of the locking member 401, and the locking member 401 moves along the unlocking path from the locking position to the unlocking position. When the locking member 401 is in the locking position and the closure handle 300 is in the first release position, the limiting part 240 is in the first limiting position and blocks the locking member 401 from moving to the unlocking position. When the locking member 401 is in the locking position, for example, the blocking part 430 is arranged on the side of the moving part 420 close to the firing handle 200, for example, the blocking part 430 includes the side wall of the moving part 420 close to the firing handle 200, so that the blocking part 430 is located on the first path. When the closure handle 300 moves from the first release position to the first closed position, the limiting part 240 rotates with the closure handle 300 and moves from the first limiting position to the second limiting position, as shown in Figure 15 and Figure 17 . The limiting part 240 in the second limiting position leaves the unlocking path and no longer blocks the movement of the locking member 401, so that the locking member 401 can smoothly move from the locking position to the unlocking position. In one embodiment, as shown in Figure 4 , Figure 5 and Figure 10a , the firing handle 300 includes a body part 320 and an acting part 310 arranged on the body part 320. The acting part 310 is arranged on the upper part of the body part 320. When the locking member 401 is in the locking position, the acting part 310 corresponds to the locking member 401, which means that the acting part 310 abuts against the locking member 401 or is spaced apart from the locking member 401 by a certain distance. The locking member 401 is configured to abut against the acting part 310 located on the first path to block the movement of the firing handle 300 along the first path. For example, the acting part 310 corresponds to the blocking surface 431.

[0086] In the embodiment of the present disclosure, the user can operate with one hand to switch the locking assembly 400 from the locking state to the unlocking state. As shown in Figure 6As shown, the body 100 also includes a handle 130. When the user operates the surgical instrument, he holds the handle 130 and presses the closing handle 200 and the firing handle 300 with his fingers. The operating member 410 is protruding from the body 100 and is located above the handle 130. The above here does not only refer to the upper left or upper right of the handle 130. The operating member 410 can also be set at the upper left or upper right of the handle 130. When the surgical instrument is not in use, the locking assembly 400 is in the first locking state. The user holds the handle 130 and presses the closing handle 200 with his fingers to move the closing handle 200 from the first release position to the first closed position, so that the locking assembly 400 switches from the first locking state to the second locking state. Then, the user can operate the operating member 410 with the thumb of the hand holding the handle so that the operating member 410 moves along Figure 6 Rotate in the direction of the arrow, or move the operating member 410 along Figure 16 The locking member 401 moves in the direction of the middle arrow from the locked position to the unlocked position, and the locking assembly 400 switches from the second locked state to the unlocked state.

[0087] In the embodiment where the moving portion 420 is rotatably disposed on the body 100, the operating member 410 is connected to the moving portion 420 and can move synchronously with the moving portion 420. For example, Figure 11 and Figure 12 As shown, the operating member 410 has a connecting portion 414 with a square groove 412 defined therein. The moving portion 420 is provided with a square protrusion 425 that engages with the square groove 412, thereby connecting the operating member 410 to the moving portion 420 and enabling the operating member 410 to rotate the moving portion 420. For another example, the operating member 410 further includes a gasket 413 disposed between the connecting portion 414 and the moving portion 420 to enhance the stability of the connection between the operating member 410 and the moving portion 420.

[0088] For example, one of the body 100 and the operating member 410 includes a protrusion (not shown in the figure), and the other includes a limiting groove, such as Figure 11 As shown, the limiting groove includes a first accommodating groove 415 and a second accommodating groove 416. When the locking member 401 is in the locked position, the protrusion is received and retained in the first accommodating groove 415. When the locking member 401 is in the unlocked position, the protrusion is received and retained in the second accommodating groove 416; thereby, the locking member 410 can be maintained in the unlocked position or in the locked position.

[0089] When the locking assembly 400 is switched from the locked state to the unlocked state, the protrusion is released from the first accommodating groove 415 and accommodated in the second accommodating groove 416. The first accommodating groove 415 and the second accommodating groove 416 limit the protrusion to prevent the operation member 410 from moving when not operated. When the user operates the operation member 410, the operating force can overcome the limitation of the first accommodating groove 415, so that the locking member 401 can be smoothly operated and moved. For example, the operation member 410 further comprises a communication groove 417 communicating the first accommodating groove 415 and the second accommodating groove 416. The protrusion enters the second accommodating groove 416 through the communication groove 417 after being released from the first accommodating groove 415. The communication groove 417 defines the movement track of the operation member 410, so that the movement of the operation member 410 is more stable.

[0090] For example, the operation member 410 is attached to the body, and when the locking member 401 is in the locked position, the friction between the operation member 410 and the body 100 makes the locking member 401 more stably kept in the locked position, and when the locking member 401 is in the unlocked position, the friction between the operation member 410 and the body 100 makes the locking member 401 more stably kept in the unlocked position. When the user operates the operation member 410, the operating force can overcome the friction between the operation member 410 and the body 100, so that the locking member 401 can be smoothly operated and moved. For example, a damping sheet is arranged on the side of the operation member 410 close to the body 100 to increase the friction between the operation member 410 and the body 100, so that the locking member 401 can be more stably kept in the unlocked position or the locked position.

[0091] For another example, the operation member 410 comprises a magnetic member, and the body 100 comprises a first magnetic matching part and a second magnetic matching part (not shown in the figure). When the locking member 401 is in the locked position, the magnetic member generates magnetic attraction with the first magnetic matching part, so that the locking member 401 is more stably kept in the locked position, and when the locking member 401 is in the unlocked position, the magnetic member generates magnetic attraction with the second magnetic matching part, so that the locking member 401 is more stably kept in the unlocked position. When the user operates the operation member 410, the operating force can overcome the magnetic attraction, so that the locking member 401 can be smoothly operated and moved. For example, the magnetic member comprises a magnet, and the first magnetic matching part and the second magnetic matching part comprise a magnetic metal. For another example, the operation member 410 comprises a magnetic metal, and the first magnetic matching part and the second magnetic matching part comprise a magnet.

[0092] The movement of the closure handle 200 from the first release position to the first closed position to close the jaw assembly 120 is achieved by the following structure:

[0093] As Figure 1 and Figure 7As shown, the jaw assembly 120 includes a cartridge seat and an anvil seat, the anvil seat is rotatably connected to the cartridge seat, and the anvil seat is connected to the distal end of the outer sleeve 111, and the closure handle 200 is connected to the proximal end of the outer sleeve 111. When the closure handle 200 is in the first release position, the outer sleeve 111 is in the proximal position, the anvil seat and the cartridge seat are at an angle, so that the jaw assembly 120 is in the open state; in response to the movement of the closure handle 200 from the first release position to the first closed position, the outer sleeve 111 moves from the proximal position to the distal position, and the distally moving outer sleeve 111 drives the anvil seat to rotate relative to the cartridge seat, so that the anvil seat is substantially parallel to the cartridge seat, and the jaw assembly 120 is switched from the open state to the closed state.

[0094] For example, the surgical instrument includes a connecting rod 700, the proximal end of the connecting rod 700 is rotatably connected to the plate body 230 of the closure handle 200, and the distal end of the connecting rod 700 is rotatably connected to the proximal end of the outer sleeve 111. In response to the movement of the closure handle 200 from the first release position to the first closed position, the plate body 230 drives the connecting rod 700 to move distally, and the connecting rod 700 drives the outer sleeve 111 to move distally.

[0095] The closure handle 200 is kept in the first closed position after moving to the first closed position by the following structure:

[0096] As shown in Figure 3 and Figure 7 The surgical instrument further includes a jaw opening assembly 500, which includes a locking rod 510 and an unlocking button 520 connected to the locking rod 510, for example, as shown in Figure 3 When the closure handle 200 is in the first release position, the plate body 230 is separated from the locking rod 510, so that the closure handle 200 can move from the first release position to the first closed position; as shown in Figure 7 When the closure handle 200 moves to the first closed position, the jaw assembly 120 is closed, and at the same time, the locking rod 510 abuts against the plate body 230 to block the movement of the closure handle 200 to the first release position, so that the closure handle 200 is kept in the first closed position, and the jaw assembly 120 is kept in the closed state. If it is necessary to open the jaw assembly 120, the unlocking button 520 is pushed to drive the locking rod 510 to rotate upward, so that the locking rod 510 is separated from the plate body 230, and the locking rod 510 no longer abuts against the plate body 230. The closure handle 200 further includes an elastic reset member (not shown in the figure) arranged at the first rotation axis K1. After the locking rod 510 is separated from the plate body 230, the elastic reset member drives the closure handle 200 to move from the first closed position to the first release position, and the jaw assembly 120 is opened.

[0097] For example, the locking lever 510 has a first hook, and the plate portion 230 is provided with a second hook ( Figure 7 (not shown), when the closing handle 200 is in the first release position, the second hook is separated from the first hook, so that the closing handle 200 can move from the first release position to the first closed position; Figure 7 As shown, when the closing handle 200 moves to the first closed position, the jaw assembly 120 closes, and the first hook cooperates with the second hook to prevent the closing handle 200 from moving to the first released position, thereby maintaining the closing handle 200 in the first closed position and the jaw assembly 120 in the closed state. If the jaw assembly 120 needs to be opened, the unlocking button 520 is pushed. The unlocking button drives the first component to leave the second hook, releasing the lock on the closing handle 200. The closing handle 200 also includes an elastic return member (not shown in the figure) disposed on the first rotation axis K1. After the locking rod 510 is separated from the plate body 230, the elastic return member drives the closing handle 200 to move from the first closed position to the first released position, thereby opening the jaw assembly 120.

[0098] The above specific implementations and the specific implementations described above are all applicable to the locking component in the present disclosure to realize its functions.

[0099] The overall operation process of surgical instruments is as follows:

[0100] When surgical instruments are not in use, Figure 1 to Figure 3 As shown, the jaw assembly 120 is in the open state, the closing handle 200 is in the first released position, the firing handle 300 is in the second released position, the locking member 401 is in the locked position, and the locking assembly 400 is in the first locked state. At this time, the user can only press the closing handle 200 to move it, but cannot press the firing handle 300 to move it, nor can the operating member 410 be operated.

[0101] The user aligns the jaw assembly 120 with the human tissue to be clamped, such as Figure 6 and Figure 7 As shown, the closing handle 200 is pressed to move the closing handle 200 from the first release position to the first closed position, closing the jaw assembly 120. The closing handle 200 maintains the jaw assembly 120 in the closed state, and the closing handle 200 remains in the first closed position. The stopper 240 moves with the closing handle 200 to leave the unlocking path. At this time, the locking assembly 400 is in the second locked state and can be operated to switch from the locked state to the unlocked state.

[0102] like Figure 8 to Figure 10aAs shown, the user operates the operating member 410, for example, by toggling the operating member 410 to rotate, the operating member 410 drives the moving portion 420 and the blocking portion 430 to rotate, causing the locking member 401 to move from the locked position to the unlocked position; or by pushing the operating member 410 to move, the operating member 410 drives the moving portion 420 and the blocking portion 430 to move, causing the locking member 401 to move from the locked position to the unlocked position. When the locking member 401 is in the unlocked position, the blocking portion 430 leaves the first path. The blocking portion 430, having left the first path, no longer blocks the movement of the action portion 310 of the firing handle 300, thereby allowing the firing handle 300 to be pressed.

[0103] like Figure 4 As shown in FIG10 , pressing the firing handle 300 causes the firing handle 300 to move from the second released position to the second closed position. During the movement of the firing handle 300 from the second released position to the second closed position, the cutting blade assembly is driven to move distally to cut the clamped tissue. For example, the surgical instrument includes a rack connected to the cutting blade assembly, and the firing handle 300 includes a pawl. In response to the firing handle 300 moving from the second released position to the second closed position, the pawl engages with the rack and drives the rack to move the cutting blade assembly distally. Repeated pressing of the firing handle 300 causes the cutting blade assembly to move distally until it reaches the bottom, completing the cutting of the clamped tissue. For another example, the surgical instrument includes a motor connected to the cutting blade assembly for driving the cutting blade assembly to move proximally or distally. The firing handle 300 is electrically connected to the motor. In response to the firing handle 300 being in the second closed position, the motor operates to drive the cutting blade assembly to move distally to cut the clamped tissue.

[0104] After the cutting blade assembly cuts to the bottom, in response to the user's operation, the cutting blade assembly moves toward the proximal side to return to the position when it is not cutting. Figure 6 As shown, the surgical instrument includes a blade return assembly 600, which is connected to the cutting blade assembly. The blade return assembly 600 is protruding from the body 100 and is connected to the cutting blade assembly. The user can pull the blade return assembly 600 proximally to move the cutting blade assembly proximally to complete the blade return. For another example, the surgical instrument includes a motor connected to the cutting blade assembly, and the firing handle 300 is electrically connected to the motor. After cutting is completed, the firing handle 300 is released, causing the firing handle 300 to switch to the second release position, and the motor drives the cutting blade assembly to move proximally to complete the blade return.

[0105] After the return is completed, Figure 9As shown, the firing handle 300 is in the second release state, the closure handle 200 is in the first closed state, the user operates the jaw opening assembly 500 to open the jaw assembly 120 and remove the surgical instrument from the human body. For example, when the closure handle 200 is in the first closed position and the locking member 401 is in the locked position, the user pushes the unlocking button 520, the locking button drives the locking rod 510 to rotate, so that the locking rod 510 is separated from the plate body 230, and the closure handle 200 is moved from the first closed position to the first release position under the action of the elastic reset member (not shown in the figure). During the movement of the closure handle 200 from the first closed position to the first release position, the driving limiting portion 240 is driven to move, and during the movement of the limiting portion 240 from the second limiting position to the first limiting position, the limiting portion 240 pushes the locking member 401 to drive the locking member 401 to move from the unlocking position to the locking position, so that the locking assembly 400 is switched from the unlocking state to the locking state. For example, as shown in FIG. 6, the locking member 401 is in the locked position, and the limiting portion 240 is in the first limiting position. Figure 3 to Figure 9 and Figure 14 to Figure 18As shown, the limiting portion 240 is at the beginning of the unlocking path when the limiting portion 240 is at the first limiting position, and the limiting portion 240 is at the end of the unlocking path when the limiting portion 240 is at the second limiting position, that is, the movement path of the limiting portion 240 from the first limiting position to the second limiting position is substantially the same as the unlocking path. When the locking member 401 is at the unlocking position, in response to the movement of the limiting portion 240 from the second limiting position to the first limiting position, the limiting portion 240 moves from the end of the unlocking path to the beginning of the unlocking path, that is, reversely moves along the unlocking path, to drive the locking member 401 to reversely move along the unlocking path, so that the locking member 401 moves from the unlocking position to the locking position. Wherein, the locking member 401 moves forward along the unlocking path when moving from the locking position to the unlocking position, and reversely moves along the unlocking path when moving from the unlocking position to the locking position. In the above process, the firing handle 300 is not driven and is still at the second release state, so that the acting portion 310 is not at the first path and does not hinder the movement of the locking member 401, so that the locking assembly 400 can be smoothly switched from the unlocking state to the locking state. After the jaw assembly 120 is opened, the firing handle 300 is still at the second release state, and the closure handle 200 is at the first release state, the locking member 401 is at the locking position, the states of the firing handle 300, the closure handle 200 and the locking assembly 400 are the same as those of the surgical instrument when the surgical instrument is not used, so that the surgical instrument can be used again. When the locking assembly 400 is at the first locking state, the limiting portion 240 blocks the abutting portion 440 of the locking member 401, so that the locking member 401 cannot rotate from the locking position to the unlocking position. When the closure handle 200 moves from the first release position to the first closing position, it rotates relative to the first rotation axis K1 by a first angle, drives the limiting portion 240 to rotate around the first rotation axis K1 by the first angle, and the limiting portion 240 rotates around the first rotation axis K1 by the first angle to move away from the abutting portion 440. The rotation of the closure handle 200 driving the limiting portion 240 provides space for the abutting portion 440 to move along the unlocking path. In the embodiment in which the limiting portion 240 is fixedly arranged on the closure handle 200, when the closure handle 200 moves from the first release position to the first closing position, the limiting portion 240 rotates around the first rotation axis K1 by the first angle. For example, the locking member 404 rotates in the direction towards the limiting portion 240 to achieve unlocking, and the angle of rotation is, for example, less than or equal to the first angle, and the above-mentioned angle is, for example, 15°-30°.

[0106] In one embodiment, as shown in Figure 19 to Figure 24 The limiting portion 240 is rotatably connected to the closure handle 200, and the machine body 100 further comprises a guide member 140 which is actuable connected with the limiting portion 240.

[0107] In response to the rotation of the closure handle 200 from the first release position to the first closed position, the limiting portion 240 performs a first rotation around the rotation axis of the closure handle 200, and the first rotation is a rotation of the limiting portion 240 around the first rotation axis K1. In response to the first rotation of the limiting portion 240, the guide member 140 urges the limiting portion 240 to perform a second rotation of the limiting portion 240 around its own rotation axis, so as to move the limiting portion 240 from the first limiting position to the second limiting position. For example, the limiting portion 240 performing the first rotation acts on the guide member 140, and the guide member 140 generates a reaction force acting on the limiting portion 240, and the reaction force makes the limiting portion 240 perform the second rotation. The rotation axis of the limiting portion 240 itself is the second rotation axis K2, and the limiting portion 240 performs the first rotation and the second rotation to move away from the locking member 401. Moving away from the locking member 401 means that the first rotation and the second rotation are both in the direction of moving away from the locking member 401, and the second rotation makes the locking member 401 move along the unlocking path to obtain a larger movement space, which improves the rotation angle of the locking member 401 when moving from the locking position to the unlocking position, thereby improving the rotation angle of the operating member 410 being operated, and further improving the operation feeling of the user.

[0108] For example, during the rotation of the closure handle 200 from the first release position to the first closed position, the closure handle 200 drives the limiting portion 240 to rotate around the first rotation axis K1 by a first angle, that is, the first rotation of the limiting portion 240 rotates by the first angle, and the guide member 140 acts on the limiting portion 240 to make the limiting portion 240 rotate around the second rotation axis K2 by a second angle, that is, the second rotation of the limiting portion 240 rotates by the second angle. Since the first rotation and the second rotation are both away from the locking member 401, the locking member 401 can rotate around the first rotation axis K1 by an angle greater than the first angle, for example, the angle of the operating member 410 being operated by the user is 30-60°. The angle of the operating member 410 being operated by the user is improved, and further the operation feeling of the user is improved.

[0109] As shown in FIG. 1, Figure 19 to Figure 22 For example, the limiting portion 240 or the guide member 140 includes the limiting slot 241, and the other includes the positioning column 141. In response to the first rotation of the limiting portion 240, the positioning column 141 slides in the limiting slot 241, and the positioning column 141 and the slot wall of the limiting slot 241 abut each other to make the limiting portion 240 perform the second rotation.

[0110] For example, the limiting portion 240 comprises a limiting groove 241, the guide portion 140 comprises a positioning column 141 fixedly arranged on the body 100, the positioning column 141 is accommodated in the limiting groove 241 and is movable in the limiting groove 241. During the movement of the closing handle 200 from the first release position to the first closing position, the closing handle 200 drives the limiting groove 241 to rotate around the first rotation axis K1, i.e. the first rotation. When the limiting groove 241 performs the first rotation, the outer edge of the positioning column 141 abuts against the inner groove wall of the limiting groove 241. The limiting groove 241 is a special-shaped groove, the extension direction of the limiting groove 241 is different from the track of the rotation of the limiting portion 240 around the first rotation axis K1, so that the action force is generated between the positioning column 141 and the inner wall of the limiting groove 241, and the limiting portion 240 is further driven to rotate around the second rotation axis K2, i.e. the positioning column 141 acts on the limiting groove 241 of the limiting portion 240, so that the limiting portion 240 performs the second rotation. Similarly, when the limiting portion 240 comprises the positioning column 141 and the guide portion 140 comprises the limiting groove 214, in response to the first rotation of the limiting portion 240, the positioning column 141 slides in the limiting groove 241, and the limiting groove 241 acts on the positioning column 141 of the limiting portion 240, so that the limiting portion 240 performs the second rotation.

[0111] In one embodiment, as shown in Figure 20a and Figure 20b The guide portion 140 comprises a stop portion 150, when the limiting portion 240 is in the first limiting position, the stop portion 150 is configured to abut against the limiting portion 240 to block the second rotation of the limiting portion 240; in response to the first rotation of the limiting portion 240, the limiting portion 240 moves away from the stop portion 150.

[0112] When the locking assembly 400 is in the first locking state, the limiting portion 240 is in the first limiting position, and the locking member 401 is in the locking position. At this time, if the user mistakenly triggers the operating member 410 and intends to drive the locking member 401 to move from the locking position to the unlocking position, the limiting portion 240 abuts against the locking member 401 to block the movement of the locking member 401. Since the limiting portion 240 is rotatably arranged on the plate body portion 230, when the user's operation force on the operating member 410 is large, the locking member 401 may drive the limiting portion 240 to rotate (perform the second rotation) when moving along the unlocking path. If the limiting member rotates under the driving of the locking member 401, the rotated limiting portion 240 provides a movement space for the movement of the locking member 401 to the unlocking position, resulting in the failure of the limiting portion 240 to block the locking member 401.

[0113] The stop portion 150 abuts against the limiting portion 240 to block the limiting portion 240 from performing the second rotation, so that the limiting portion 240 can be more stably kept in the first limiting position and better limit the locking member 401. During the movement of the closure handle 200 from the first release position to the first closed position, the limiting portion 240 performs the first rotation, the limiting portion 240 rotates away from the stop portion 150 about the first rotation axis K1, and the guide portion 140 acts on the limiting portion 240 to make the limiting portion 240 perform the second rotation, so that the limiting portion 240 smoothly moves to the second limiting position.

[0114] For example, as shown in Figure 20a and Figure 20b The limiting portion 240 includes a limiting groove 241, and the guide portion 140 includes a positioning column 141. For example, the second rotation is a clockwise rotation. As shown in Figure 20b The limiting groove 241 includes two side groove walls 243, a first end portion 242 connected between the two side groove walls 243, a second end portion 244 connected between the two side groove walls 243, the positioning column 141 includes a stop surface 142 corresponding to the first end portion 242, an abutting surface 143 corresponding to the side groove wall 243, and the stop portion 150 includes the stop surface 142. When the limiting portion 240 is in the first limiting position, the stop surface 142 abuts against the first end portion 242 to block the limiting portion 240 from performing the second rotation (clockwise rotation) and keep the limiting portion 240 in the first limiting position. In response to the first rotation of the limiting portion 240, the positioning column 141 moves away from the first end portion 242 to the second end portion 244, so that the stop surface 142 is separated from the first end portion 242, the stop surface 142 no longer abuts against the limiting portion 240, and the positioning column 141 acts on the side groove wall 243 through the abutting surface 143 to make the limiting portion 240 perform the second rotation. When the limiting portion 240 is in the second limiting position, the positioning column 141 abuts against the second end portion 244.

[0115] For example, as shown in Figure 20cAs shown, the limiting portion 240 comprises the positioning post 141, the guiding portion comprises the limiting slot 241, the second rotation is clockwise rotation, the shape of the limiting slot 241 is not limited to the shape shown in the figure, the limiting slot 241 can adapt to the compound motion of the limiting portion 240. The limiting slot 241 comprises the limiting stop surface 245, the stop portion 150 comprises the limiting stop surface 240. For example, when the limiting portion 240 is in the first limiting position, the positioning post 141 is located at the second end portion 244 of the limiting slot, and the limiting stop surface 245 is the end side wall of the second end portion 244 of the limiting slot 241. When the limiting portion 240 is in the first limiting position, the limiting stop surface 241 abuts against the positioning post 141 to block the limiting portion 240 from performing the second rotation (clockwise rotation) and thus keep the limiting portion 240 in the first limiting position. In response to the first rotation (clockwise rotation) of the limiting portion 240, the positioning post 141 is separated from the limiting stop surface 245 and moves towards the first end portion 243, and the stop surface 142 no longer abuts against the limiting portion 240. The side slot wall 243 of the limiting slot 241 acts on the positioning post 141 to make the limiting portion 240 perform the second rotation. When the limiting portion 240 is in the second limiting position, the positioning post 141 abuts against the first end portion 243.

[0116] After the closure handle 200 moves from the first release position to the first closed position, the limiting portion 240 is in the second limiting position. In response to the user's operation on the operating member 410, the moving portion 420 rotates with the operating member 410 until the abutting portion 440 abuts against the limiting portion 240, so that the locking assembly 400 is in the unlocked state. The user operates the firing handle 300 to drive the cutting knife assembly to fire, and after firing to the bottom, the user operates the jaw opening assembly 500 to open the jaw assembly 120, and moves the closure handle from the first closed position to the first release position. During the movement of the closure handle 200 from the first closed position to the first release position, the closure handle 200 rotates around the first rotation axis K1, driving the limiting portion 240 to perform a third rotation, which is the reverse motion of the first rotation. At the same time, the positioning post 141 moves in the limiting slot 241 and acts on the limiting slot 241 to make the limiting portion 240 rotate around its own rotation axis (the second rotation axis K2) and perform a fourth rotation, which is the reverse motion of the second rotation. The limiting portion 240 moves from the second limiting position to the first limiting position through the third rotation and the fourth rotation.

[0117] During the movement of the limiting portion 240 from the second limiting position to the first limiting position, the limiting portion 240 always abuts against the abutting portion 440 of the locking member 401. The above-mentioned movement of the limiting portion 240 drives the locking member 401 to move from the unlocked position to the locked position, and thus switches the locking assembly from the unlocked state to the first locked state.

[0118] In another embodiment, as Figure 25 to Figure 30As shown, the locking assembly 400 comprises a transmission part 411 connected to the operating part 410, the transmission part 411 is in transmission connection with the locking part 401, in response to the operation of the operating part 410 by the user, the operating part 410 drives the transmission part 411 to move, the transmission part 411 drives the locking part 401 to move from the locking position to the unlocking position, so that the locking assembly 400 is switched from the locked state to the unlocked state.

[0119] The operating part 410 is in transmission connection with the moving part 420 through the transmission part 411, so that the operating part 410 does not need to be directly connected with the moving part 420, and then the position of the operating part 410 is no longer limited by the position of the locking part 401, the operating part 410 can be arranged at any position of the machine body 100, and the position of the operating part 410 can be arranged more in line with ergonomics, so that the user can operate the operating part 410 more conveniently and comfortably.

[0120] For example, the operating part 410 is rotatably arranged on the shell of the machine body 100, and the locking part 401 is rotatably arranged on the machine body, and the rotation axis of the locking part 401 and the rotation axis of the operating part 410 are staggered with each other. Staggered means that the rotation axis of the locking part 401 and the rotation axis of the operating part 410 are not concentric.

[0121] For example, the transmission part 411 comprises a transmission rod 4111, one end of the transmission rod 4111 is connected to the operating part 410, and the other end abuts against the locking part 401, in response to the operation of the operating part 410, the transmission rod 4111 moves to drive the locking part 401 to move from the locking position to the unlocking position.

[0122] For example, the locking part 401 comprises the above-mentioned moving part 420, the blocking part 430 and the receiving part 450 connected to the moving part 420, the moving part 420 is rotatably arranged on the machine body, the transmission part 411 is rotatably arranged on the machine body, and the receiving part 450 abuts against the transmission part 411 to make the transmission part 411 in transmission connection with the locking part 401.

[0123] The receiving portion 450 protrudes from the moving portion 420. The transmission rod 411 abuts against the receiving portion 450, for example, the transmission portion 411 is located below the receiving portion 450 and abuts against the lower portion of the receiving portion 450. For example, the abutting portion 440 includes the upper surface of the receiving portion 450. When the locking assembly 400 is in the first locking state, the limiting member 240 abuts against the abutting portion 440 to limit the movement of the locking member 401 from the locking position to the unlocking position. When the locking assembly 400 is in the second locking state, the limiting portion 240 is separated from the abutting portion 440. In response to the operation of the operation member 410, the transmission portion 411 rotates clockwise, and an upward force is applied to the receiving portion 450 to rotate the moving portion 420 counterclockwise. The counterclockwise rotating moving portion 420 drives the blocking portion 430 to move away from the first path, and the locking member 401 moves from the locking position to the unlocking position, thereby switching the locking assembly 400 from the second locking state to the unlocking state.

[0124] When the locking assembly 400 is in the unlocking state, in response to the user operating the jaw opening assembly 500, the closing handle 200 moves from the first closing position to the first release position, and the limiting portion 240 moves from the second limiting position to the first limiting position, and reversely moves along the unlocking path. The limiting portion 240 abuts against the abutting portion 440 to drive the locking member 401 to reversely move along the unlocking path to move from the unlocking position to the locking position. During the movement of the locking member 401 from the unlocking position to the locking position, the receiving portion 450 rotates with the locking member 401, for example, the receiving portion 450 rotates counterclockwise, and the lower side of the receiving portion 450 abuts against the transmission portion 411. The counterclockwise rotating receiving portion 450 drives the transmission portion 411 to rotate, thereby driving the operation member 410 to rotate to the position before being operated, i.e., the operation member 410 is reset, and the locking assembly 400 switches from the unlocking state to the first locking state.

[0125] In the embodiment of Figure 25 to Figure 30 , the limiting portion 240 can also be rotatably arranged on the plate body portion 230. The machine body 100 is provided with a guide portion 140. When the closing handle 200 rotates from the first release position to the first closing position, the limiting portion 240 performs the first rotation and the second rotation to move from the first limiting position to the second limiting position. The structure of the limiting portion 240 and the guide portion 140 is the same as that in the embodiment of Figure 19 to Figure 24 . The position and the angle of the operation member 410 can be adjusted, which is convenient for the user to operate comfortably.

[0126] It should be understood that although the present specification is described in terms of embodiments, each embodiment does not necessarily contain only one independent technical solution. The description of the specification is for the sake of clarity only, and those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0127] The above detailed description set forth above in connection with the appended drawings is merely descriptive of the best mode contemplated for carrying out the disclosure and is not intended to limit the scope of the disclosure. It should be understood that the disclosure is capable of further modifications, uses, and / or adaptations other than those specifically set forth herein.

Claims

1. A surgical instrument, characterized in that: The invention comprises a body, a firing handle rotatably arranged on the body, and a locking assembly, wherein the locking assembly comprises an operating member, a locking member arranged on the body, and a transmission part connected to the operating member, wherein the firing handle has a second release position and a second closed position; The locking member has a locked position and an unlocked position; In the locked position, the locking member is configured to block movement of the firing handle from the second released position to the second closed position; When the locking member is in the unlocked position, in response to the firing handle being operated, the firing handle moves from the second released position to the second closed position; The transmission portion is in transmission connection with the locking member. In response to the operation of the operating member, the transmission portion moves to drive the locking member to move from the locking position to the unlocking position.

2. The surgical instrument according to claim 1, wherein The transmission part includes a transmission rod, one end of which is connected to the operating member, and the other end is connected to the locking member; in response to the operating member being operated, the transmission rod rotates to drive the locking member to move from the locked position to the unlocked position.

3. The surgical instrument according to claim 2, wherein: The locking member includes a moving part, which is rotatably arranged on the body, and the transmission rod is in transmission connection with the moving part; in response to the operating member being operated, the transmission rod rotates to drive the moving part to rotate so that the locking member moves from the locked position to the unlocked position.

4. The surgical instrument according to claim 3, wherein: The locking member further comprises a receiving portion connected to the moving portion, wherein the receiving portion abuts against the transmission rod so as to connect the transmission rod to the moving portion in a transmission manner; in response to the rotation of the transmission rod, the receiving portion drives the moving portion to rotate.

5. The surgical instrument according to claim 1, wherein The operating member is rotatably arranged on the housing of the machine body, and the locking member is rotatably arranged on the machine body. The rotation axis of the locking member and the rotation axis of the operating member are staggered with each other.

6. The surgical instrument according to claim 1, wherein The surgical instrument further includes a closing handle rotatably disposed on the body, the closing handle having a first release position and a first closed position; a path for the firing handle to move from the second release position to the second closed position is a first path; The path of movement of the locking member from the locked position to the unlocked position is an unlocking path; the closing handle includes a limiting portion, the limiting portion having a first limiting position and a second limiting position; the locking assembly has a first locked state, a second locked state, and an unlocked state; When the locking assembly is in the first locked state, the closing handle is in the first released position, the limiting portion is in the first limited position, the locking member is in the locked position, and at least a portion of the limiting portion in the first limited position is located in the unlocking path to block the locking member from moving from the locked position to the unlocked position; in response to the closing handle moving from the first released position to the first closed position, the limiting member moves from the first limited position to the second limited position, and the locking assembly switches from the first locked state to the second locked state; When the locking assembly is in the second locking state, the closing handle is in the first closing position, the limiting portion is in the second limiting position, the locking member is in the locking position, and the limiting portion in the second limiting position is out of the unlocking path; In the locked position, the locking member is at least partially located in the first path to block movement of the firing handle from the second released position to the second closed position; In response to the operating member being operated, the transmission portion drives the locking member to move from the locking position to the unlocking position to leave the first path.

7. The surgical instrument according to claim 1, wherein During the movement of the firing handle from the second release position to the second closed position, the firing handle moves along a first path; The locking member includes a blocking portion and a moving portion connected to the blocking portion, the moving portion is rotatably connected to the body, and the operating member is connected to the moving portion. When the locking member is in the locked position, at least a portion of the blocking portion is located in the first path, and the blocking portion is configured to block the firing handle located in the first path. In response to the operating member driving the moving portion to rotate, the moving portion drives the blocking portion to rotate and leave the first path so that the locking member moves from the locking position to the unlocking position.

8. The surgical instrument according to claim 7, wherein: The moving part includes a central rotating part and a semi-ring part connected to the central rotating part, the semi-ring part is arranged around the central rotating part, the blocking part is arranged at one end of the semi-ring part, and the blocking part and the other end of the semi-ring part form a gap; when the locking member is in the locked position, the blocking part is at least partially located in the first path to block the firing handle located in the first path; when the locking member is in the unlocked position, the blocking part leaves the first path and the gap is at least partially located in the first path to avoid the firing handle moving along the first path.

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