Surgical instrument

Abstract

The present disclosure relates to a surgical instrument, including a body, a closing handle, a firing handle, and a locking assembly. The locking assembly includes an operating member, a locking member, and a limiting portion. When the locking assembly is in a locked state, at least a part of the locking member is located in a first path to abut against the firing handle located in the first path. When the locking assembly is in an unlocked state, the locking member leaves the first path. When the locking member is in a locked position and the closing handle is in a first release position, the limiting portion is located in a first limiting position, and at least a part of the limiting portion is located in an unlocking path. When the locking member is in a locked position and the closing handle is in a first closed position, the limiting portion is located in a second limiting position, and the limiting portion leaves the unlocking path. The locking member abuts against the firing handle located in the first path to limit the firing handle, so that the locking member can smoothly move from the locked position to the unlocked position relative to the firing handle, avoiding the situation where the locking member cannot move to the unlocked position and the locking member fails to unlock.

Description

Technical Field

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

[0002] A surgical cutting stapler is a commonly used medical instrument to replace manual suturing. Its main working principle is to use a cutting knife to sever tissue and use titanium staples to anastomose tissue, similar to a stapler. According to the applicable different body parts, it can be divided into various staplers. For a surgical cutting stapler, its working principle is to enter the patient's body through the cannula of a trocar positioned at the surgical site, and then create a longitudinal incision in the tissue and apply staples on the opposite side of the incision, so as to sever and anastomose the tissue. Summary of the Invention

[0003] The solution of the present disclosure is achieved in the following way:

[0004] A surgical instrument includes a body, a closing handle rotatably arranged on the body, a firing handle rotatably arranged on the body, and a locking assembly. The locking assembly includes an operating member, a locking member connected to the operating member and arranged on the body, and a limiting portion connected to the closing handle;

[0005] The closing handle has a first release position and a first closing position, the firing handle has a second release position and a second closing position. During the process of the firing handle moving from the second release position to the second closing position, the firing handle moves along a first path;

[0006] When the locking assembly is in a locked state, the locking member is in a locked position; in the locked position, at least a part of the locking member is located on the first path to abut against the firing handle located on the first path, thereby blocking the firing handle from moving from the second release position to the second closing position;

[0007] When the locking assembly is in an unlocked state, the locking member is in an unlocked position; in the unlocked position, the locking member leaves the first path. In response to the firing handle being operated, the firing handle moves along the first path from the second release position to the second closing position;

[0008] The path along which the locking member moves from the locked position to the unlocked position is the unlocking path; when the locking member is in the locked position and the closing handle is in the first release position, the limiting portion is in the first limiting position, and at least a part of the limiting portion in the first limiting position is located on the unlocking path to block the locking member from moving from the locked position to the unlocked position; when the locking member is in the locked position and the closing handle is in the first closed position, the limiting portion is in the second limiting position, and the limiting portion in the second limiting position leaves the unlocking path. In response to the operation of the operating portion, the locking member moves from the locked position to the unlocked position, so that the locking assembly is switched from the locked state to the unlocked state.

[0009] In one embodiment, the locking member includes a blocking portion and a moving portion connected to the blocking portion. The moving portion is movably disposed on the body, and the operating member is connected to the moving portion.

[0010] When the locking member is in the locked position, at least a part of the blocking portion is located on the first path to abut against the firing handle located on the first path; when the locking member is in the locked position and the closing handle is in the first closed position, the limiting portion is in the second limiting position. In response to the operation of the operating member, the moving portion moves relative to the body, so that the locking member moves from the locked position to the unlocked position. In the unlocked position, the blocking portion leaves the first path.

[0011] In one embodiment, the moving portion is rotatably connected to the body.

[0012] When the locking member is in the locked position and the closing handle is in the first closed position, in response to the operation of the operating member, the moving portion drives the blocking portion to rotate so that the blocking portion leaves the first path, and the locking member moves from the locked position to the unlocked position.

[0013] In one embodiment, the moving portion includes a central rotating portion and a semi-circular ring portion connected to the central rotating portion. The semi-circular ring portion is disposed around the central rotating portion. The blocking portion is disposed at one end of the semi-circular ring portion, and a notch is formed between the blocking portion and the other end of the semi-circular ring portion; when the locking member is in the locked position, at least a part of the blocking portion is located on the first path to abut against the firing handle along the first path; when the locking member is in the unlocked position, the blocking portion leaves the first path and at least a part of the notch is located on the first path to avoid the firing handle moving along the first path.

[0014] In one embodiment, the rotation axis about which the moving part rotates relative to the body coincides with the rotation axis of the closing handle.

[0015] In one embodiment, the moving part is movably disposed on the body;

[0016] When the locking member is in the locked position and the closing handle is in the first closed position, in response to the operation member being operated, the moving part moves to drive the blocking part to move so that the blocking part leaves the first path, and the locking member moves from the locked position to the unlocked position.

[0017] In one embodiment, the body is provided with a moving groove, the moving groove is a through groove, and the operation member passes through the moving groove and is connected to the moving part; in response to the operation member being operated, the operation member drives the moving part to move along the moving groove, thereby driving the blocking part to leave the first path, and the locking member moves from the locked position to the unlocked position.

[0018] In one embodiment, when the closing handle is in the first closed position and the locking member is in the unlocked position, in response to the closing handle moving from the first closed position to the first release position, the limiting member moves from the second limiting position to the first limiting position, and drives the locking member to move from the unlocked position to the locked position.

[0019] In one embodiment, the first limiting position is located at the head of the unlocking path, and the second limiting position is located at the tail of the unlocking path; when the closing handle is in the first closed position and the locking member is in the unlocked position, in response to the limiting member moving from the second limiting position to the first limiting position, the limiting member drives the locking member to move in the reverse direction along the unlocking path, so that the locking member moves from the unlocked position to the locked position.

[0020] In one embodiment, the limiting part is fixedly connected to the closing handle or integrally formed with the closing handle; in response to the closing handle moving from the first release position to the first closed position, the limiting part moves from the first limiting position to the second limiting position.

[0021] In one embodiment, the limiting part is rotatably connected to the closing handle, and the body includes a guiding member, and the guiding member is movably connected to the limiting part;

[0022] In response to the closing handle rotating from the first release position to the first closing position, the limiting portion performs a first rotation about the rotation axis of the closing handle. In response to the first rotation of the limiting portion, the guiding member actuates the limiting portion to perform a second rotation about its own rotation axis; the first rotation and the second rotation cause the limiting portion to move from the first limiting position to the second limiting position.

[0023] In one embodiment, one of the limiting portion or the guiding member includes a limiting groove, and the other includes a positioning post. The positioning post is received in the limiting groove. In response to the first rotation of the limiting member, the positioning post slides in the limiting groove, and the positioning post abuts against the groove wall of the limiting groove to cause the limiting portion to perform the second rotation.

[0024] In one embodiment, the guiding member includes a stop portion. When the limiting portion is in the first limiting position, the stop portion is configured to abut against the limiting portion to block the limiting portion from performing the second rotation; in response to the first rotation of the limiting portion, the limiting portion leaves the stop portion.

[0025] In one embodiment, the locking assembly further includes a transmission portion connected to the operating member. The transmission portion is in transmission connection with the locking member. In response to the operating member being operated, the transmission portion moves to drive the locking member to move from the locking position to the unlocking position.

[0026] In one embodiment, the transmission portion includes a transmission rod. One end of the transmission rod is connected to the operating member, and the other end abuts against the locking member. In response to the operating member being operated, the transmission rod rotates to drive the locking member to move from the locking position to the unlocking position.

[0027] In one embodiment, the operating member is rotatably disposed on the outer shell of the body, and the locking member is rotatably disposed on the body. The rotation axis of the locking member is offset from the rotation axis of the operating member. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of a surgical instrument according to an embodiment of the present disclosure;

[0029] Figure 2 is a schematic structural diagram of the locking assembly in the first locked state according to an embodiment of the present disclosure;

[0030] Figure 3 is a schematic internal structural diagram of the locking assembly in the first locked state according to an embodiment of the present disclosure;

[0031] Figure 4Schematic diagram of the firing handle in the second release position and the second closed position according to an embodiment of the present disclosure;

[0032] Figure 5 is Figure 3 Schematic diagram of the structure at position A in

[0033] Figure 6 Schematic diagram of the locking assembly in the second locked state according to an embodiment of the present disclosure;

[0034] Figure 7 Internal schematic diagram of the locking assembly in the second locked state according to an embodiment of the present disclosure;

[0035] Figure 8 Schematic diagram of the locking assembly in the unlocked state according to an embodiment of the present disclosure;

[0036] Figure 9 Internal schematic diagram of the locking assembly in the unlocked state according to an embodiment of the present disclosure;

[0037] Figure 10a is Figure 9 Schematic diagram of the structure at position B in

[0038] Figure 10b Schematic diagram of the locking member in the locked position and the unlocked position according to an embodiment of the present disclosure;

[0039] Figure 11 Exploded view of the operation part and the moving part according to an embodiment of the present disclosure;

[0040] Figure 12 Exploded view of the operation part and the moving part from another angle according to an embodiment of the present disclosure;

[0041] Figure 13 is Figure 3 Schematic diagram of the structure at position A in

[0042] Figure 14 Schematic diagram of the moving part and the limiting part according to another embodiment of the present disclosure;

[0043] Figure 15 Schematic diagram of the structure in which the moving part is movably connected to the body in an embodiment of the present disclosure;

[0044] Figure 16 Schematic diagram of the operation part being operated in an embodiment of the present disclosure;

[0045] Figure 17 Schematic diagram of the limiting member in the second limiting position and the locking member in the locked position according to an embodiment of the present disclosure;

[0046] Figure 18 It is a schematic structural diagram of the locking member in the unlocked position in an embodiment of the present disclosure;

[0047] Figure 19 It is a schematic structural diagram of the closing handle in the first release position in an embodiment of the present disclosure;

[0048] Figure 20a It is Figure 19 a schematic structural diagram of the position C in

[0049] Figure 20b It is a schematic structural diagram of the stop portion in an embodiment of the present disclosure;

[0050] Figure 20c It is a schematic structural diagram of the stop portion in another embodiment of the present disclosure;

[0051] Figure 21 It is a schematic structural diagram of the closing handle in the first closed position in an embodiment of the present disclosure;

[0052] Figure 22 It is Figure 21 a schematic structural diagram of the position D in

[0053] Figure 23 It is a schematic structural diagram of the locking assembly in the unlocked state in an embodiment of the present disclosure;

[0054] Figure 24 It is Figure 18 a schematic structural diagram of the position E in

[0055] Figure 25 It is a schematic structural diagram of the operating portion in still another embodiment of the present disclosure;

[0056] Figure 26 It is a schematic structural diagram of the surgical instrument in still another embodiment of the present disclosure;

[0057] Figure 27 It is a schematic structural diagram of the closing handle in the first closed position in still another embodiment of the present disclosure;

[0058] Figure 28 It is Figure 27 a schematic structural diagram of the position F in

[0059] Figure 29 It is a schematic structural diagram of the locking assembly in the unlocked state in an embodiment of the present disclosure;

[0060] Figure 30 It is Figure 29 a schematic structural diagram of the position G in

[0061] Wherein:

[0062] 100. Body; 110. Sleeve assembly; 111. Outer sleeve; 120. Jaw assembly; 130. Handle; 140. Guide part; 141. Positioning post; 142. Stop surface; 143. Contact surface; 150. Moving groove;

[0063] 200. Closing handle; 210. Handle part; 230. Plate part; 240. Limiting part; 241. Limiting groove; 242. First end; 243. Side groove wall; 244. Second end;

[0064] 300. Firing handle; 310. Acting part; 320. Body part;

[0065] 400. Locking assembly; 410. Operating part; 411. Transmission part; 412. Square groove; 413. Gasket; 414. Connecting part; 415. First accommodation groove; 416. Second accommodation groove; 417. Connecting groove;

[0066] 401. Locking piece;

[0067] 420. Moving part; 421. Central rotating part; 422. Half-ring part; 424. Notch; 425. Square protrusion; 430. Blocking part; 431. Blocking surface; 440. Contact part; 450. Receiving part;

[0068] 500. Jaw opening assembly; 510. Locking rod; 520. Unlock button;

[0069] 600. Knife-returning part;

[0070] 700. Connecting rod. Detailed implementation mode

[0071] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the following further elaborates on the present disclosure in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts belong to the scope of protection of the present disclosure.

[0072] It should be understood that the terms "proximal" and "distal" used herein are relative to the clinician operating the surgical instrument. The term "proximal" refers to the part close to the clinician, and the term "distal" refers to the part far from the clinician. That is, the handle is proximal and the jaw assembly is distal. For example, the proximal end of a certain component 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 position relationships are not restrictive and absolute.

[0073] In the present disclosure, unless otherwise clearly defined and limited, terms such as "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a movable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components such as abutment. For those of ordinary skill in the art, 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 is a qualifier before "connection", it has the meaning defined by the corresponding qualifier, only excluding the obvious cases that need to be excluded, and not excluding other possible cases.

[0074] 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 cannula assembly 110 connected to the body 100, a jaw assembly 120 connected to the body 100, a cutter assembly (not shown in the figure), a closing handle 200 rotatably provided on the body 100, and a firing handle 300 rotatably provided on the body 100. The cannula assembly 110 includes an inner cannula (not shown in the figure) and an outer cannula 111. The jaw assembly 120 is connected to the outer cannula 111. The closing handle 200 is in driving connection with the outer cannula 111. The closing handle 200 has a first release position and a first closing position. As Figure 2 shown, when the surgical instrument is not in use, the closing handle 200 is in the first release position, and the jaw assembly 120 is in an open state. As Figure 6 shown, when the user needs to close the jaw assembly 120, the closing handle 200 is pressed to move the closing handle 200 from the first release position to the first closing position. The movement of the closing handle 200 drives the outer cannula 111 to move distally. The outer cannula 111 moving distally drives the jaw assembly 120 to switch from the open state to the closed state. After the closing handle 200 reaches the first closing position, it remains in the first closing position. The structure for the closing handle 200 to remain in the first closing position will be described below.

[0075] The firing handle 300 is transmission-connected to the cutting blade assembly. The specific implementation structure is described below. The firing handle 300 has a second, released position and a second, closed position. The cutting blade assembly includes a blade head (not shown) located within the jaw assembly 120. When the jaw assembly 120 is closed, it clamps tissue. A user can press the firing handle 300 to move the firing handle 300 from the second, released position to the second, closed position. This movement of the firing handle 300 triggers the firing of the cutting blade assembly. Firing refers to distal movement of the cutting blade assembly, causing the blade head located within the jaw assembly 120 to move distally to cut tissue held within the jaw assembly 120. The surgical instrument also includes a blade return assembly and a jaw opening assembly. After the blade head moves distally to its limit position, the user operates the blade return assembly to move the cutting blade assembly proximally to its initial, unfired position. At this point, the user can operate the jaw opening assembly 500 to open the jaw assembly 120, thereby causing the closing handle 200 to move from the first, closed position to the first, released position. The specific manner in which the cutting knife assembly returns to its initial position before firing, as well as the structure of the jaw opening assembly 500, are described below.

[0076] During actual surgery, after the surgeon closes the jaw assembly 120 to clamp human tissue, the surgeon may need to make adjustments, such as changing the clamping position, before controlling the cutting blade assembly to cut the clamped tissue. This means that even when the jaw assembly 120 is closed, the proper firing time may not have arrived. If the surgeon mistakenly triggers the firing handle 300 during this operation, the cutting blade assembly may fire, cutting unintended tissue and causing a surgical error.

[0077] In one solution of the prior art, a locking structure is provided on the body 100 to limit the closing of the firing handle 300 so as to avoid accidental operation of closing the firing handle 300, and both the locking structure and the firing handle 300 are provided with a tooth structure, which cooperates with each other through the tooth structure. When firing is required, the locking structure is operated to rotate to disengage from the position of cooperating with the firing handle 300. However, since the locking structure cooperates with the firing handle 300 through the teeth, the locking structure is easily 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 easily causes unlocking failure. The user needs to operate multiple times to release the closing restriction of the locking structure on the firing handle 300.

[0078] like Figure 2 and Figure 3 As shown, the surgical instrument of the present disclosure includes a locking assembly 400, which includes an operating member 410 provided on the body 100, a locking member 401 connected to the operating member 410, and a limiting portion 240 connected to 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 the first path; Figure 4As shown, during the above process, the firing handle 300 rotates about its own rotation axis. The movement trajectory of the firing handle 300 from the second release position to the second closed position is the first path (where the solid line represents the second release position and the dashed line represents the second closed position).

[0079] 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 the locked position. In the locked position, at least part of the locking member 401 is located on the first path. The locking member 401 in the locked position is configured to abut against the firing handle 300 located on the first path, thereby blocking the movement of the firing handle 300 from the second release position to the second closed position. Among them, abutting against the firing handle 300 located on the first path means that the locking member 401 in the locked position abuts against the firing handle 300 in the second release position to block the movement of the firing handle 300, or the locking member 401 in the locked position separates from the firing handle 300 in the second release position. In response to the movement of the firing handle 300 along the first path, the locking member 401 abuts against 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 the unlocked position. In the unlocked position, the locking member 401 leaves the first path, where leaving means that the locking member 401 is not located on 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 user's operation on the firing handle 300, the firing handle 300 moves from the second release position to the second closed position.

[0080] The path of the locking member 401 moving from the locked position to the unlocked position is the unlocking path, where Figure 10b the solid line in 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 closing handle 200 is in the first release position, the limiting portion 240 is located at the first limiting position. At least part of the limiting portion 240 located at the first limiting position is located on the unlocking path to block the movement of the locking member 401 from the locked position to the unlocked position.

[0081] When the locking assembly 400 is in the locked state and the closing handle 200 is in the first closed position, the limiting portion 240 is located at the second limiting position. The limiting portion 240 located at the second limiting position leaves the unlocking path. Here, leaving means that the limiting portion 240 is not located on the unlocking path. In response to the operation of the operating member 401, the locking member 401 moves from the locked position to the unlocked position, so that the locking assembly 400 is switched from the locked state to the unlocked state.

[0082] When the locking assembly 400 is in the locked state, the locking member 401 in the locked position blocks the firing handle 300 located on the first path, preventing the firing handle 300 from being operated to close, and further preventing the cutting blade assembly from cutting the tissue, so as to avoid unwanted cutting of the tissue. When the locking assembly 400 is in the unlocked state, the locking member 401 in the unlocked position leaves the first path, allowing the firing handle 300 to move along the first path, and further allowing the firing handle 300 to be operated to close, enabling the cutting blade assembly to cut the tissue.

[0083] In the locked state, the locking member 401 resists against the firing handle 300 located on the first path to block the movement of the firing handle 300. When the locking member 401 moves from the locked position to the unlocked position, the locking member 401 leaves the firing handle 300 and no longer resists against the firing handle 300 located on the first path. By the way that the locking member 401 resists against the firing handle 300 located on the first path to limit the firing handle 300, the locking member 401 can smoothly move from the locked position to the unlocked position relative to the firing handle 300, avoiding the situation where the locking member 401 cannot move to the unlocked position and the unlocking of the locking member 401 fails.

[0084] When the surgical instrument is not in use, the closing handle 200 is in the first release position, the firing handle 300 is in the second release position, the locking assembly is in the locked state, and the jaw assembly 120 is in the open state. At this time, the locking member 401 is in the locked position, and the limiting portion 240 is in the first limiting position, restricting the locking member 401 from moving from the locked position to the unlocked position. In this case, the user cannot operate the operating member 410, and the locking member 401 cannot move to the unlocked position, that is, the locking member 401 cannot be unlocked when the jaw assembly 120 is not closed, avoiding the situation where the locking assembly 400 is in the unlocked state in advance and cannot limit the firing handle 300 after the jaw assembly 100 is closed subsequently. When the locking member 401 is in the locked position and the closing handle 200 is in the first closed position, that is, 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 locking assembly 400 to the unlocked state, thereby releasing the limitation on the firing handle 300.

[0085] For example, the locked state includes a first locked state and a second locked state. When the locking member 401 is in the locked position and the closing handle 200 is in the first release position, the locking assembly 400 is in the first locked state. When the locking member 401 is in the locked position and the closing handle 200 is in the first closed position, the locking assembly 400 is in the second locked state. During the use of the surgical instrument, the locking assembly 400 switches from the first locked state to the second locked state, and then from the second locked state to the unlocked state.

[0086] The locking member 401 includes a blocking portion 430 and a moving portion 420 connected to the blocking portion 430. The moving portion 420 is movably connected to the body 100, and the operating portion 410 is connected to the moving portion 420. When the locking member 401 is in the locked 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 restrict the movement of the firing handle 300. When the locking member 401 is in the unlocked position, the blocking portion 430 leaves the first path and does not abut against the firing handle 300 located in the first path, enabling the firing handle 300 to smoothly move from the second release position to the second closed position.

[0087] When the locking member 401 is in the locked position and the closing handle 200 is in the first closed position, in response to the operation of the operating portion 410, the moving portion 420 moves relative to the body 100, and the moving moving portion 420 drives the blocking portion 430 to move, so that the locking member 401 moves from the locked position to the unlocked position.

[0088] In one embodiment, as Figures 7 to 10a shown, the moving portion 420 is rotatably connected to the body 100, the operating member 410 is connected to 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.

[0089] When the locking assembly 400 is in the second locked state, that is, when the locking member 401 is in the locked position and the closing handle is in the first closed position, in response to the operation of the operating member 410, the operating member 410 drives the moving portion 420 to rotate, and the moving portion 420 drives the blocking portion 430 to rotate, so that the blocking portion 430 leaves the first path, so that the locking member 401 moves from the locked position to the unlocked position.

[0090] The locking member 401 moves from the locked position to the unlocked position by rotation, and the unlocking path of the locking member 401 is the movement path when the locking member 401 rotates around the rotation axis of the moving portion 420. In one embodiment, as Figures 10a to 12As shown, the moving part 420 includes a central rotating part 421 and a semi-ring part 422 connected to the central rotating part 421. The semi-ring part 422 is arranged around the central rotating part 421, and the semi-ring part 422 is fixedly connected to the central rotating part 421 or can be integrally formed. The semi-ring part 422 is an incomplete ring, and its ring can be a major arc, a minor arc or a semi-circle. The blocking part 430 is arranged at one end of the semi-ring part 422, and the blocking part 430 and the other end of the semi-ring part 422 enclose a notch 424 in the circumferential direction around the central rotating part 421. When the locking member 401 is in the locked position, the blocking part 430 is located on the first path, and the notch 424 is away from the first path, so that the locking member 401 can block the firing handle located on 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 notch 424 is located on the first path, so that the locking member 401 can avoid the firing handle 300 located on the first path through the notch 422. Thus, the locking assembly 400 will not block the firing handle 300 moving along the first path in the unlocked state. In one embodiment, as Figure 13 shown, the blocking part 430 includes a blocking surface 431. The blocking surface 431 is, for example, arc-shaped, and the blocking surface 431 is configured to be at least partially located on the first path when the locking member 401 is in the locked position. The blocking part 430 abuts against the firing handle 300 moving on 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 against the firing handle 300 to block the firing handle 300 from moving along the first path. Also, for 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 against the firing handle 300 to block the firing handle 300 from 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 further the firing handle 300 can move from the second release position to the second closed position. The blocking surface 431 can also be of other shapes.

[0091] The provision of the aforementioned blocking portion 430 further enhances the stability of the locking member 401 in the locked 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 released position to the second closed position, the blocking portion 430 abuts against the firing handle 300 to block the movement of the firing handle 300. The user presses the firing handle 300, causing the firing handle 300 to apply force to the blocking portion 430. However, the movement trajectory of the blocking portion 430 is arc-shaped, and the force applied by the firing handle 300 to the blocking portion 430 does not cause it to move in an arc, making it difficult for the blocking portion 430 to escape from the locked position. In other words, the provision of the blocking portion 430 ensures that when the locking assembly 400 is in the locked state, the locking member 401 can be better maintained in the locked position if the firing handle 300 is accidentally pressed.

[0092] The arcuate shape of the blocking surface 431 enables the locking element 401 to smoothly move from the locked position to the unlocked position. When the locking assembly 400 is in the locked state, the firing handle 300 contacts the blocking portion 430, or the blocking portion 430 is located along a first path with a predetermined distance between the firing handle 300 and the firing handle 300. The blocking surface 431 extends along a first arc, that is, the first arc is in contact with or spaced a predetermined distance from the firing handle 300. For example, the center of the blocking surface 431 coincides with the rotation axis of the moving portion 420. When the locking element 401 moves from the locked position to the unlocked position, the locking element 401 moves along the unlocking path, and the blocking surface 431 rotates about the rotation axis of the moving portion 420, rotating along the first arc. The blocking surface 431 rotating along the first arc does not interfere with the firing handle 300, preventing the firing handle 300 from interfering with the locking element 401 moving along the unlocking path, further enabling the locking element 401 to smoothly move from the locked position to the unlocked position.

[0093] For example, the rotation axis of the moving portion 420 coincides with the rotation axis of the closing handle 200. The closing handle 200 includes a handle portion 210 and a rotation axis 220. The rotation axis 220 is disposed along a first rotation axis K1. When a user operates the closing handle 200, the closing handle 200 rotates about the first rotation axis K1. For example, both ends of the rotation axis 220 engage with the housing 100. The rotation axis 220 extends through the handle portion 210, allowing the handle portion 210 to rotate about the rotation axis 220. The rotation axis of the moving portion 420 coincides with the first rotation axis K1. For example, the moving portion 420 and the rotation axis 220 are rotatably connected, for example, the moving portion 420 is sleeved on the rotation axis 220. When the operating member 410 rotates, the moving portion 420 is driven to rotate relative to the rotation axis 220. The rotation axis 220 serves to define the rotation axis of the moving portion 420, thereby stabilizing the position of the moving portion 420.

[0094] During the process of the closing handle 200 switching between the first release position and the first closing position, the handle portion 210 rotates around the first rotation axis K1, and the rotating shaft 220 does not rotate or move. Therefore, the moving portion 420 does not move or rotate due to the rotation of the closing handle 200, so that when the closing handle 200 switches between the first release position and the first closing position, the locking member 401 can be stably held in the locking position.

[0095] In one embodiment, as Figure 7 shown, the closing handle 200 further includes a plate body portion 230 connected to the handle portion 210. The handle portion 210 is for the user to operate, and the plate body portion 230 is located above the handle portion 210 and is used to act on the closing mechanism to drive the jaw assembly 120 to close. The specific structure of the closing mechanism will be described below. For example, the above-mentioned limiting portion 240 is fixedly arranged on the plate body portion 230. For example, as Figure 7 and Figure 12 shown, in the thickness direction of the plate body portion 230, the plate body portion 230 and the firing handle 300 are offset from each other, that is, the firing handle 300 and the closing handle 200 are at least partially stacked, which can make the internal mechanism of the body 100 more compact. The blocking portion 430 protrudes along the thickness direction of the plate body portion 230. The blocking portion 430 faces the firing handle 300, so that the blocking portion 430 can block the firing handle 300 located in the first path.

[0096] In another embodiment, as Figures 14 to 17 shown, the moving portion 420 is movably arranged on the body, the operating member 410 is connected to the moving portion 420, and the operating member is movably arranged on the outer surface of the body. When the closing handle 200 is in the first closing position and the locking member 410 is in the locking position, in response to the operation of the operating member 410, the moving portion 420 moves relative to the body 100, driving the blocking portion 430 to move so that the blocking portion 430 leaves the first path, and the locking member 401 moves from the locking position to the unlocking position, Figure 18 and the locking member is in the unlocking position in

[0097] For example, as 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 to 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 locked position, the operating member 410 is located at one end of the moving groove 150. In response to the operating member 410 moving along the length direction of the moving groove 150 to the other end of the moving groove 150, the operating member 410 moves from the locked position to the unlocked position. During the above process, the locking member 401 moves in a direction away from the firing handle 300 to leave the first path.

[0098] For example, the locking member 401 moves with the operating member 410, from Figure 17 the position to Figure 18 the position. The dashed line 17 in the figure is the unlocking path of the locking member 401, and the locking member 401 moves along the unlocking path from the locked position to the unlocked position. When the locking member 401 is in the locked position and the closing handle 300 is in the first release position, the limiting part 240 is in the first limiting position, blocking the movement of the locking member 401 towards the unlocked position. The locking member 401 is in the locked position. For example, the blocking part 430 is provided 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 closing handle 300 moves from the first release position to the first closed position, the limiting part 240 rotates with the closing handle 300 and moves from the first limiting position to the second limiting position, as Figure 15 and Figure 17 shown. The limiting part 240 located 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 locked position to the unlocked position. In one embodiment, as Figure 4 、 Figure 5 and Figure 10a shown, the firing handle 300 includes a main body part 320 and an acting part 310 provided on the main body part 320. The acting part 310 is provided on the upper part of the main body part 320. When the locking member 401 is in the locked position, the acting part 310 corresponds to the locking member 401. Here, the correspondence means that the acting part 310 abuts against the locking member 401 or is spaced apart 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.

[0099] In the embodiments of the present disclosure, the user can operate with one hand to switch the locking assembly 400 from the locked state to the unlocked state. As Figure 6As shown, the body 100 further includes a handle 130. When a user operates the surgical instrument, the user holds the handle 130 and presses the closing handle 200 and the firing handle 300 with fingers. The operating member 410 protrudes from the body 100 and is located above the handle 130. Here, "above" does not only refer to directly above the handle 130. The operating member 410 can also be arranged 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 locked state. The user holds the handle 130 and presses the closing handle 200 with fingers, so that the closing handle 200 moves from the first release position to the first closed position, and the locking assembly 400 switches from the first locked state to the second locked 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 rotates along the Figure 6 arrow direction in Figure 16 , or moves the operating member 410 along the

[0100] arrow direction in Figure 11 and Figure 12 , so that the locking member 401 moves from the locked position to the unlocked position, and the locking assembly 400 switches from the second locked state to the unlocked state.

[0101] For example, in an embodiment where the moving part 420 is rotatably arranged on the body 100, the operating member 410 is connected to the moving part 420 and can move synchronously with the moving part 420. For example, as Figure 11 and

[0102] Figure 12 shown, the operating member 410 is provided with a connecting portion 414, a square groove 412 is formed in the connecting portion 414, a square protrusion 425 is arranged on the moving part 420, and the square protrusion 425 is embedded in the square groove 412, so that the operating member 410 is connected to the moving part 420, and the operating member 410 can drive the moving part 420 to rotate. Another example is that the operating member 410 further includes a gasket 413, and the gasket 413 is arranged between the connecting portion 414 and the moving part 420 to improve the connection stability between the operating member 410 and the moving part 420.

[0101] 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. As Figure 11 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 held in the first accommodating groove 415. When the locking member 401 is in the unlocked position, the protrusion is received and held in the second accommodating groove 416; thus, the locking member 410 can be held in the unlocked position or the locked position.

[0102] When the locking component 400 switches from the locked state to the unlocked state, the protrusion disengages from the first receiving groove 415 and is received in the second receiving groove 416. The first receiving groove 415 and the second receiving groove 416 limit the protrusion to prevent the operating member 410 from moving when not being operated. When a user operates the operating member 410, the operating force can overcome the limitation of the first receiving groove 415, enabling the locking member 401 to be smoothly operated and move. For example, the operating member 410 further includes a communication groove 417 that communicates the first receiving groove 415 and the second receiving groove 416. After the protrusion disengages from the first receiving groove 415, it enters the second receiving groove 416 through the communication groove 417. The communication groove 417 defines the movement trajectory of the operating member 410, making the movement of the operating member 410 more stable.

[0103] For example, when the operating member 410 is in contact with the body and the locking member 401 is in the locked position, the frictional force between the operating member 410 and the body 100 keeps the locking member 401 more stably in the locked position. When the locking member 401 is in the unlocked position, the frictional force between the operating member 410 and the body 100 keeps the locking member 401 more stably in the unlocked position. When a user operates the operating member 410, the operating force can overcome the frictional force between the operating member 410 and the body 100, enabling the locking member 401 to be smoothly operated and move. For example, a damping piece is provided on the side of the operating member 410 close to the body 100 to increase the frictional force between the operating member 410 and the body 100, enabling the locking member 401 to better stay in the unlocked position or the locked position.

[0104] For another example, the operating member 410 includes a magnetic member, and the body 100 includes a first magnetic mating portion and a second magnetic mating portion (not shown in the figure). When the locking member 401 is in the locked position, the magnetic member and the first magnetic mating portion generate a magnetic attraction force, keeping the locking member 401 more stably in the locked position. When the locking member 401 is in the unlocked position, the magnetic member and the second magnetic mating portion generate a magnetic attraction force, keeping the locking member 401 more stably in the unlocked position. When a user operates the operating member 410, the operating force can overcome the above magnetic attraction force, enabling the locking member 401 to be smoothly operated and move. For example, the magnetic member includes a magnet, and the first magnetic mating portion and the second magnetic mating portion include magnetic metals. For another example, the operating member 410 includes magnetic metals, and the first magnetic mating portion and the second magnetic mating portion include magnets.

[0105] The closing of the jaw assembly 120 when the closing handle 200 moves from the first release position to the first closing position is achieved through the following structure:

[0106] Such as Figure 1 and Figure 7As shown, the jaw assembly 120 includes a cartridge seat and an anvil. The anvil is rotatably connected to the cartridge seat, and the anvil is connected to the distal end of the outer sleeve 111. The closing handle 200 is connected to the proximal end of the outer sleeve 111. When the closing handle 200 is in the first release position, the outer sleeve 111 is in the proximal position, and the anvil and the cartridge seat are at an angle to each other, causing the jaw assembly 120 to be in an open state. In response to the closing handle 200 moving from the first release position to the first closed position, the outer sleeve 111 moves from the proximal position to the distal position. The outer sleeve 111 moving distally drives the anvil to rotate relative to the cartridge seat until the anvil and the cartridge seat are substantially parallel, thereby causing the jaw assembly 120 to switch from the open state to the closed state.

[0107] For example, the surgical instrument includes a link 700. The proximal end of the link 700 is rotatably connected to the plate portion 230 of the closing handle 200, and the distal end of the link 700 is rotatably connected to the proximal end of the outer sleeve 111. In response to the closing handle 200 moving from the first release position to the first closed position, the plate portion 230 rotates to drive the link 700 to move distally, and the link 700 drives the outer sleeve 111 to move distally.

[0108] The closing handle 200 is held in the first closed position after moving to the first closed position by the following structure:

[0109] Such as Figure 3 and Figure 7 As shown, the surgical instrument further includes a jaw opening assembly 500. The jaw opening assembly 500 includes a locking lever 510 and an unlocking button 520 connected to the locking lever 510. For example, as Figure 3 shown, when the closing handle 200 is in the first release position, the plate portion 230 is separated from the locking lever 510, enabling the closing handle 200 to move from the first release position to the first closed position; as Figure 7 shown, when the closing handle 200 moves to the first closed position, the jaw assembly 120 closes, and at the same time, the locking lever 510 abuts against the plate portion 230 to prevent the closing handle 200 from moving to the first release position, thereby keeping the closing handle 200 in the first closed position and the jaw assembly 120 in the closed state. If it is necessary to open the jaw assembly 120, the unlocking button 520 is pushed. The unlocking button 520 drives the locking lever 510 to rotate upward, causing the locking lever 510 to be separated from the plate portion 230. The locking lever 510 no longer abuts against the plate portion 230. The closing handle 200 further includes an elastic reset member (not shown in the figure) provided at the first rotation axis K1. After the locking lever 510 is separated from the plate portion 230, the elastic reset member drives the closing handle 200 to move from the first closed position to the first release position and opens the jaw assembly 120.

[0110] For another example, the locking lever 510 has a first hook body, and the plate body portion 230 is provided with a second hook body ( Figure 7 not shown in FIG. Figure 7 ). When the closing handle 200 is in the first release position, the second hook body is separated from the first hook body, enabling the closing handle 200 to move from the first release position to the first closed position; as Figure 7 shown in FIG. Figure 7 , when the closing handle 200 moves to the first closed position, the jaw assembly 120 closes, and at the same time, the first hook body cooperates with the second hook body to prevent the closing handle 200 from moving to the first release position, thereby keeping the closing handle 200 in the first closed position and keeping the jaw assembly 120 in the closed state. If it is necessary to open the jaw assembly 120, the unlocking button 520 is pushed, and the unlocking button drives the first member away from the second hook body, releasing the locking of the closing handle 200. The closing handle 200 further includes a resilient return member (not shown in the figure) provided at the first rotation axis K1. After the locking lever 510 is separated from the plate body portion 230, the resilient return member drives the closing handle 200 to move from the first closed position to the first release position and opens the jaw assembly 120.

[0111] The above specific implementation manners and the specific implementation manners described above are all applicable to the locking assembly in the present disclosure to achieve its functions.

[0112] The overall operation process of the surgical instrument is as follows:

[0113] When the surgical instrument is not in use, as Figures 1 to 3 shown in FIG. Figures 1 to 3 , the jaw assembly 120 is in the open state, the closing handle 200 is in the first release position, the firing handle 300 is in the second release 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 make it move, cannot press the firing handle 300 to make it move, and cannot operate the operating member 410.

[0114] The user aligns the jaw assembly 120 with the human tissue to be clamped. As Figure 6 and Figure 7 shown in FIGS. Figure 6 and Figure 7 , the closing handle 200 is pressed, so that the closing handle 200 moves from the first release position to the first closed position, the jaw assembly 120 closes, the closing handle 200 keeps the jaw assembly 120 in the closed state, and the closing handle 200 remains in the first closed position. The limiting portion 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.

[0115] As Figures 8 to 10aAs shown, the user operates the operating member 410. For example, the user toggles the operating member 410 to rotate, and 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, for example, the user pushes the operating member 410 to move, and 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, and the blocking portion 430 that has left the first path no longer blocks the movement of the acting portion 310 of the firing handle 300, so that the firing handle 300 can be pressed.

[0116] As Figure 4 As shown in FIGS. 5 and 10, the firing handle 300 is pressed, causing the firing handle 300 to move from the second release position to the second closed position. During the process of the firing handle 300 moving from the second release position to the second closed position, the cutting knife assembly is driven to move distally to cut the clamped tissue. For example, the surgical instrument includes a rack connected to the cutting knife assembly, and the firing handle 300 includes a pawl. In response to the firing handle 300 moving from the second release position to the second closed position, the pawl engages with the rack and drives the rack to drive the cutting knife assembly to move distally. By pressing the firing handle 300 multiple times, the cutting knife assembly moves distally until the cutting is complete, and the cutting of the clamped tissue is completed. Or, for example, the surgical instrument includes a motor connected to the cutting knife assembly for driving the cutting knife assembly to move proximally or distally, and 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 knife assembly to move distally to cut the clamped tissue.

[0117] After the cutting knife assembly cuts to the end, in response to the user's operation, the cutting knife assembly moves proximally to return to the position before cutting. For example, as Figure 6 shown, the surgical instrument includes a knife return assembly 600. The knife return assembly 600 is connected to the cutting knife assembly, and the knife return assembly 600 protrudes outside the body 100. The knife return assembly 600 is connected to the cutting knife assembly. The user can pull the knife return assembly 600 proximally to move the cutting knife assembly proximally to complete the knife return. Or, for example, the surgical instrument includes a motor connected to the cutting knife assembly, and the firing handle 300 is electrically connected to the motor. After the 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 knife assembly to move proximally to complete the knife return.

[0118] After the knife return is completed, as Figure 9As shown, the firing handle 300 is in the second release state, the closing handle 200 is in the first closed state, and 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 closing 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, and the locking button drives the locking lever 510 to rotate, causing the locking lever 510 to disengage from the plate body portion 230. Under the action of the elastic reset member (not shown in the figure), the closing handle 200 moves from the first closed position to the first release position. During the process of the closing handle 200 moving from the first closed position to the first release position, the limiting portion 240 is driven to move. When the limiting portion 240 moves from the second limiting position to the first limiting position, it pushes against the locking member 401 to drive the locking member 401 to move from the unlocked position to the locked position, so that the locking assembly 400 is switched from the unlocked state to the locked state. For example, as Figures 3 to 9 , and Figures 14 to 18As shown, when the limiting part 240 is located at the first limiting position, it is at the head end of the unlocking path, and when the limiting part 240 is located at the second limiting position, it is at the tail end of the unlocking path, that is, the movement path of the limiting part 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 located at the unlocking position, in response to the limiting part 240 moving from the second limiting position to the first limiting position, the limiting part 240 moves from the tail end of the unlocking path to the head end of the unlocking path, that is, moves in the reverse direction along the general unlocking path, so as to drive the locking member 401 to move in the reverse direction along the unlocking path, and make the locking member 401 move from the unlocking position to the locking position. Among them, when the locking member 401 moves from the locking position to the unlocking position, it moves forward along the unlocking path, and when it moves from the unlocking position to the locking position, it moves in the reverse direction along the unlocking path. In the above process, the firing handle 300 is not driven and remains in the second release state, so that the acting part 310 is not located on the first path and does not hinder the movement of the locking member 401, enabling the locking assembly 400 to smoothly switch from the unlocking state to the locking state. After the jaw assembly 120 is opened, the firing handle 300 remains in the second release state, while the closing handle 200 is in the first release state, and the locking member 401 is in the locking position. The states of the firing handle 300, the closing handle 200, and the locking assembly 400 are the same as when the surgical instrument is not in use, enabling the surgical instrument to be used again. When the locking assembly 400 is in the first locking state, the limiting part 240 blocks the abutting part 440 of the locking member 401, so that the locking member 401 cannot rotate from the locking position to the unlocking position. When the closing handle 200 moves from the first release position to the first closing position, it rotates a first angle relative to the first rotation axis K1, driving the limiting part 240 to rotate a first angle around the first rotation axis K1, and the limiting part 240 rotates a first angle around the first rotation axis K1 to leave the abutting part 440. The rotation of the closing handle 200 driving the limiting part 240 provides space for the abutting part 440 to move along the unlocking path. In an embodiment where the limiting part 240 is fixedly arranged on the closing handle 200, when the closing handle 200 moves from the first release position to the first closing position, the limiting part 240 rotates a first angle around the first rotation axis K1. For example, the locking member 404 rotates towards the direction of the limiting part 240 to achieve unlocking, and the rotation angle is, for example, less than or equal to the first angle, and the above angle is, for example, 15° - 30°.

[0119] In one embodiment, as Figures 19 to 24 shown, the limiting part 240 is rotatably connected to the closing handle 200, and the body 100 further includes a guiding member 140, and the guiding member 140 is actuably connected to the limiting part 240.

[0120] In response to the closing handle 200 rotating from the first release position to the first closed position, the limiting portion 240 performs a first rotation about the rotation axis of the closing handle 200. The first rotation is the limiting portion 240 rotating about the first rotation axis K1. In response to the first rotation of the limiting portion 240, the guiding member 140 actuates the limiting portion 240 to cause the limiting portion 240 to perform a second rotation about its own rotation axis, so that the limiting portion 240 moves from the first limiting position to the second limiting position. For example, the limiting portion 240 performing the first rotation acts on the guiding member 140, and the guiding member 140 generates a reaction force acting on the limiting portion 240, and the reaction force causes the limiting portion 240 to perform the second rotation. The rotation axis of the limiting portion 240 itself is the second rotation axis K2. When the limiting portion 240 performs the first rotation and the second rotation, it moves away from the locking member 401. Moving away from the locking member 401 means that both the first rotation and the second rotation are in the direction of moving away from the locking member 401. The second rotation enables the locking member 401 to obtain a larger movement space when moving along the unlocking path, increasing the rotation angle of the locking member 401 when moving from the locked position to the unlocked position, thereby increasing the rotation angle of the operating member 410 when being operated, and further improving the user's operating feel.

[0121] For example, during the process of the closing handle 200 rotating from the first release position to the first closed position, the closing handle 200 drives the limiting portion 240 to rotate a first angle about the first rotation axis K1, that is, the first rotation of the limiting portion 240 rotates a first angle. The guiding portion 140 acts on the limiting portion 240 to cause the limiting portion 240 to rotate a second angle about the second rotation axis K2, that is, the second rotation of the limiting portion 240 rotates a second angle. Since both the first rotation and the second rotation move away from the locking member 401, the angle by which the locking member 401 can rotate about the first rotation axis K1 is greater than the first angle. For example, the angle by which the user can operate the operating member 410 to rotate is 30 - 60°. This increases the angle by which the user operates the operating member 410, and further improves the user's operating feel.

[0122] As Figures 19 to 22 shown, one of the limiting portion 240 or the guiding portion 140 includes a limiting groove 241, and the other includes a positioning post 141. In response to the first rotation of the limiting portion 240, the positioning post 141 slides in the limiting groove 241, and the positioning post 141 abuts against the groove wall of the limiting groove 241 to cause the limiting portion 240 to perform the second rotation.

[0123] For example, the limiting portion 240 includes a limiting groove 241, and the guiding portion 140 includes a positioning post 141. The positioning post 141 is fixedly disposed on the body 100. The positioning post 141 is received in the limiting groove 241 and can move within the limiting groove 241. During the process of the closing handle 200 moving from the first release position to the first closing position, the closing handle 200 drives the limiting groove 241 to rotate about 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 post 141 abuts against the inner groove wall of the limiting groove 241. The limiting groove 241 is a special-shaped groove, and the extending direction of the limiting groove 241 is different from the rotation trajectory of the limiting portion 240 about the first rotation axis K1, so that a force is generated between the positioning post 141 and the inner wall of the limiting groove 241, thereby driving the limiting portion 240 to rotate about the second rotation axis K2, i.e., the positioning post 141 acts on the limiting groove 241 of the limiting portion 240 to cause the limiting portion 240 to perform the second rotation. Similarly, when the limiting portion 240 includes a positioning post 141 and the guiding member 140 includes a limiting groove 214, in response to the first rotation of the limiting portion 240, the positioning post 141 slides within the limiting groove 241, and the limiting groove 241 acts on the positioning post 141 of the limiting portion 240 to cause the limiting portion 240 to perform the second rotation.

[0124] In one embodiment, as Figure 20a and Figure 20b shown, the guiding member 140 includes 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 limiting portion 240 from performing the second rotation; in response to the first rotation of the limiting portion 240, the limiting portion 240 leaves the stop portion 150.

[0125] When the locking assembly 400 is in the first locked state, the limiting portion 240 is in the first limiting position and the locking member 401 is in the locked position. At this time, if the user accidentally triggers the operating member 410 and intends to drive the locking member 401 to move from the locked position to the unlocked 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 disposed on the plate body portion 230, when the operating force of the user on the operating member 410 is relatively large, when the locking member 401 moves along the unlocking path, it may drive the limiting portion 240 to rotate (perform the second rotation). If the limiting member rotates under the drive of the locking member 401, the rotated limiting portion 240 provides a movement space for the locking member 401 to move towards the unlocked position, resulting in the failure of the limiting portion 240 to block the locking member 401.

[0126] The stop portion 150 abuts against the limiting portion 240 to block the second rotation of the limiting portion 240, so that the limiting portion 240 can be more stably held at the first limiting position, and better limit the locking member 401. During the movement of the closing handle 200 from the first release position to the first closing position, the limiting portion 240 performs a first rotation. When the limiting portion 240 rotates around the first rotation axis K1, it moves away from the stop portion 150, and the guiding portion 140 acts on the limiting portion 240 to cause the limiting portion 240 to perform a second rotation, so that the limiting portion 240 can smoothly move to the second limiting position.

[0127] For example, as Figure 20a and Figure 20b shown, the limiting portion 240 includes a limiting groove 241, and the guiding portion 140 includes a positioning post 141. For example, the second rotation is a clockwise rotation. As Figure 20b shown, the limiting groove 241 includes two side groove walls 243, a first end portion 242 connected between the two side groove walls 243, and a second end portion 244 connected between the two side groove walls 243. The positioning post 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 above-mentioned 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 second rotation (clockwise rotation) of the limiting portion 240, thereby keeping the limiting portion 240 in the first limiting position. In response to the first rotation of the limiting portion 240, the positioning post 141 moves away from the first end portion 242 and moves towards the second end portion 244, separating the stop surface 142 from the first end portion 242, and the stop surface 142 no longer abuts against the limiting portion 240. The positioning post 141 acts on the side groove wall 243 through the abutting surface 143 to cause the limiting portion 240 to perform a second rotation. When the limiting portion 240 is in the second limiting position, the positioning post 141 abuts against the second end portion 244.

[0128] For example, as Figure 20cAs shown, the limiting part 240 includes a positioning post 141, the guiding part includes a limiting groove 241, the second rotation is a clockwise rotation, the shape of the limiting groove 241 is not limited to the shape shown in the figure, and the limiting groove 241 can adapt to the composite movement of the limiting part 240. The limiting groove 241 includes a limiting stop surface 245, and the stop part 150 includes a limiting stop surface 240. For example, when the limiting part 240 is in the first limiting position, the positioning post 141 is located at the second end 244 of the limiting groove, and the limiting stop surface 245 is the end side wall of the second end 244 of the limiting groove 241. When the limiting part 240 is in the first limiting position, the limiting stop surface 241 abuts against the positioning post 141 to block the second rotation (clockwise rotation) of the limiting part 240, thereby keeping the limiting part 240 in the first limiting position. In response to the first rotation (clockwise rotation) of the limiting part 240, the positioning post 141 separates from the limiting stop surface 245 and moves towards the first end 243, and the stop surface 142 no longer abuts against the limiting part 240. The side groove wall 243 of the limiting groove 241 acts on the positioning post 141 to cause the limiting part 240 to perform the second rotation. When the limiting part 240 is in the second limiting position, the positioning post 141 abuts against the first end 243.

[0129] After the closing handle 200 moves from the first release position to the first closing position, the limiting part 240 is in the second limiting position. In response to the user's operation on the operating part 410, the moving part 420 rotates with the operating part 410 until the abutting part 440 abuts against the limiting part 240, making the locking assembly 400 in the unlocked state. The user operates the firing handle 300 to drive the cutting tool assembly to fire, and after firing to the end, the tool is retracted. After the retraction is completed, the user operates the jaw opening assembly 500 to open the jaw assembly 120 and move the closing handle from the first closing position to the first release position. During the process of the closing handle 200 moving from the first closing position to the first release position, the closing handle 200 rotates around the first rotation axis K1, driving the limiting part 240 to perform the third rotation, and the third rotation is the reverse movement of the first rotation. At the same time, the positioning post 141 moves in the limiting groove 241 and acts on the limiting groove 241, causing the limiting part 240 to rotate around its own rotation axis (the second rotation axis K2) to perform the fourth rotation, and the fourth rotation is the reverse movement of the second rotation. The limiting part 240 moves from the second limiting position to the first limiting position through the third rotation and the fourth rotation.

[0130] During the process of the limiting part 240 moving from the second limiting position to the first limiting position, the limiting part 240 always abuts against the abutting part 440 of the locking part 401. The above movement of the limiting part 240 drives the locking part 401 to move from the unlocked position to the locked position, thereby switching the locking assembly from the unlocked state to the first locked state.

[0131] In another embodiment, as Figures 25 to 30As shown, the locking assembly 400 includes 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 user's operation on the operating part 410, the operating part 410 drives the transmission part 411 to move, and 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 locking state to the unlocking state.

[0132] 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 to the moving part 420. Furthermore, the position where the operating part 410 is arranged 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 setting of the operating part 410 can be more ergonomic, enabling the user to operate the operating part 410 more conveniently and comfortably.

[0133] For example, the operating part 410 is rotatably arranged on the outer 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 is offset from the rotation axis of the operating part 410. Being offset means that the rotation axis of the locking part 401 is not concentric with the rotation axis of the operating part 410.

[0134] For example, the transmission part 411 includes 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.

[0135] For example, the locking part 401 includes the above-mentioned moving part 420, a blocking part 430, and a 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 enable the transmission part 411 to be in transmission connection with the locking part 401.

[0136] The receiving part 450 protrudes from the moving part 420. The transmission rod 4111 abuts against the receiving part 450. For example, the transmission part 411 is located below the receiving part 450 and abuts against the lower part of the receiving part 450. For example, the abutting part 440 includes the upper surface of the receiving part 450. When the locking assembly 400 is in the first locked state, the limiting part 240 abuts against the abutting part 440 to limit the locking part 401 from moving from the locked position to the unlocked position. When the locking assembly 400 is in the second locked state, the limiting part 240 is separated from the abutting part 440. In response to the operation of the operating part 410, the transmission part 411 rotates clockwise, applying an upward acting force to the receiving part 450 to make the moving part 420 rotate counterclockwise. The counterclockwise rotating moving part 420 drives the blocking part 430 away from the first path, causing the locking part 401 to move from the locked position to the unlocked position, and further switching the locking assembly 400 from the second locked state to the unlocked state.

[0137] When the locking assembly 400 is in the unlocked state, in response to the user operating the jaw opening assembly 500, the closing handle 200 moves from the first closed position to the first release position, and the limiting part 240 moves from the second limiting position to the first limiting position, moving generally in the reverse direction along the unlocking path. The limiting part 240 abuts against the abutting part 440, driving the locking part 401 to move in the reverse direction along the unlocking path to move from the unlocked position to the locked position. During the process of the locking part 401 moving from the unlocked position to the locked position, the receiving part 450 rotates with the locking part 401. For example, the receiving part 450 rotates counterclockwise, the lower side of the receiving part 450 abuts against the transmission part 411, and the counterclockwise rotating receiving part 450 drives the transmission part 411 to rotate, and further drives the operating part 410 to rotate to the position before being operated, that is, the operating part 410 is reset, and the locking assembly 400 is switched from the unlocked state to the first locked state.

[0138] In Figures 25 to 30 the embodiment of, the limiting part 240 can also be rotatably arranged on the plate body part 230. The machine body 100 is provided with a guiding part 140. When the closing handle 200 rotates from the first release position to the first closed position, the limiting part 240 performs the first rotation and the second rotation to move from the first limiting position to the second limiting position. The structures of the limiting part 240 and the guiding part 140 are the same as those in Figures 19 to 24 the embodiment of. This enables the position and angle of the operating part 410 to be adjusted, facilitating comfortable operation by the user.

[0139] It should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and 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.

[0140] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present disclosure, and they are not intended to limit the protection scope of the present disclosure. Any equivalent implementation manners or modifications made without departing from the technical spirit of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A surgical instrument, characterized in that, Comprising a body, a closing handle rotatably arranged on the body, a firing handle rotatably arranged on the body, and a locking assembly. The locking assembly includes an operating member, a locking member connected to the operating member and arranged on the body, and a limiting portion connected to the closing handle; the limiting portion is rotatably connected to the closing handle, the body includes a guiding member, and the guiding member is movably connected to the limiting portion; the locking member includes a moving portion, the operating member is connected to the moving portion, the moving portion is rotatably connected to the body, and the rotation axis of the moving portion relative to the body coincides with the rotation axis of the closing handle; The closing handle has a first release position and a first closing position, the firing handle has a second release position and a second closing position, and during the process of the firing handle moving from the second release position to the second closing position, the firing handle moves along a first path; When the locking assembly is in a locked state, the locking member is in a locked position; In the locked position, at least a part of the locking member is located in the first path to abut against the firing handle located in the first path, thereby blocking the firing handle from moving from the second release position to the second closing position; When the locking assembly is in an unlocked state, the locking member is in an unlocked position; in the unlocked position, the locking member leaves the first path, and in response to the operation of the firing handle, the firing handle moves along the first path from the second release position to the second closing position; The path for the locking member to move from the locked position to the unlocked position is the unlocking path; when the locking member is in the locked position and the closing handle is in the first release position, the limiting portion is in a first limiting position, and at least a part of the limiting portion in the first limiting position is located in the unlocking path to block the locking member from moving from the locked position to the unlocked position; when the locking member is in the locked position and the closing handle is in the first closing position, the limiting portion is in a second limiting position, and the limiting portion in the second limiting position leaves the unlocking path, and in response to the operation of the operating member, the locking member moves from the locked position to the unlocked position, so that the locking assembly is switched from the locked state to the unlocked state; Wherein, in response to the closing handle rotating from the first release position to the first closing position, the limiting portion performs a first rotation around the rotation axis of the closing handle, and in response to the first rotation of the limiting portion, the guiding member actuates the limiting portion to perform a second rotation around its own rotation axis; the first rotation and the second rotation cause the limiting portion to move from the first limiting position to the second limiting position.

2. The surgical instrument according to claim 1, wherein, The locking member includes a blocking portion, and the blocking portion is connected to the moving portion; When the locking member is in the locked position, at least a part of the blocking portion is located in the first path to abut against the firing handle located in the first path; When the locking member is in the locking position and the closing handle is in the first closed position, the limiting portion is in the second limiting position. In response to the operating member being operated, the moving portion moves relative to the body so that the locking member moves from the locking position to the unlocking position. In the unlocking position, the blocking portion leaves the first path.

3. The surgical instrument according to claim 2, wherein When the locking member is in the locking position and the closing handle is in the first closed position, in response to the operating member being operated, the moving portion drives the blocking portion to rotate so that the blocking portion leaves the first path, causing the locking member to move from the locking position to the unlocking position.

4. The surgical instrument according to claim 3, wherein The moving portion includes a central rotating portion and a semi-circular ring portion connected to the central rotating portion. The semi-circular ring portion is disposed around the central rotating portion. The blocking portion is disposed at one end of the semi-circular ring portion. A notch is formed between the blocking portion and the other end of the semi-circular ring portion. When the locking member is in the locking position, at least a part of the blocking portion is located in the first path to abut against the firing handle located in the first path. When the locking member is in the unlocking position, the blocking portion leaves the first path and at least a part of the notch is located in the first path to avoid the firing handle moving along the first path.

5. The surgical instrument according to claim 1, characterized in that, When the closing handle is in the first closed position and the locking member is in the unlocking position, in response to the closing handle moving from the first closed position to the first release position, the limiting portion moves from the second limiting position to the first limiting position and drives the locking member to move from the unlocking position to the locking position.

6. The surgical instrument according to claim 5, wherein The first limiting position is located at the head end of the unlocking path, and the second limiting position is located at the tail end of the unlocking path. When the closing handle is in the first closed position and the locking member is in the unlocking position, in response to the limiting portion moving from the second limiting position to the first limiting position, the limiting portion drives the locking member to move in the reverse direction along the unlocking path so that the locking member moves from the unlocking position to the locking position.

7. The surgical instrument according to claim 1, wherein One of the limiting portion or the guiding member includes a limiting groove, and the other includes a positioning post. The positioning post is received in the limiting groove. In response to a first rotation of the limiting portion, the positioning post slides in the limiting groove, and the positioning post abuts against the groove wall of the limiting groove so that the limiting portion undergoes the second rotation.

8. The surgical instrument according to claim 1, characterized in that, The guiding member includes a stop portion. When the limiting portion is in the first limiting position, the stop portion is configured to abut against the limiting portion to block the limiting portion from performing the second rotation. In response to a first rotation of the limiting portion, the limiting portion leaves the stop portion.

9. The surgical instrument according to claim 1, wherein, The locking assembly further includes a transmission portion connected to the operating member. The transmission portion is in transmission connection with the locking member. In response to the operating member being operated, the transmission portion moves to drive the locking member to move from the locking position to the unlocking position.

10. The surgical instrument according to claim 9, wherein, The transmission part includes a transmission rod. One end of the transmission rod is connected to the operating member, and the other end abuts against 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.

11. The surgical instrument according to claim 10, wherein, The operating member is rotatably arranged on the outer shell of the body, and the locking member is rotatably arranged on the body. The rotation axis of the locking member is offset from the rotation axis of the operating member.

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