Surgical instrument

Abstract

The surgical instrument comprises a machine body, a closing handle, a percussion handle and a locking assembly, and the locking assembly comprises an operating piece, a locking piece and a limiting part; when the locking assembly is in the locking state, at least part of the locking piece is located on the first path so as to abut against the percussion handle located on the first path. When the locking assembly is in an unlocking state, the locking piece leaves the first path; when the locking piece is located at the locking position and the closing handle is located at the first releasing position, the limiting part is located at the first limiting position, and at least part of the limiting part is located in the unlocking path; when the locking piece is located at the locking position and the closing handle is located at the first closing position, the limiting part is located at the second limiting position, and the limiting part leaves the unlocking path. The locking piece can smoothly move from the locking position to the unlocking position relative to the percussion handle in the mode that the locking piece abuts against the percussion handle located on the first path to limit the percussion handle, and the situation that the locking piece cannot move to the unlocking position, and unlocking of the locking piece fails is avoided.

Description

[0001] This application is a divisional application of the invention patent application filed on September 4, 2024, with application number CN202411240352.4 and invention title "surgical instruments". Technical Field

[0002] This disclosure relates to a surgical instrument. Background Technology

[0003] Surgical staplers are commonly used medical instruments that replace manual suturing. Their main working principle is to use a scalpel to sever tissue and titanium staples to anastomose it, similar to a stapler. Depending on the body part they are used for, staplers can be categorized into various types. For surgical staplers, the working principle involves inserting a cannula of a trocar positioned at the surgical site into the patient's body, creating a longitudinal incision in the tissue, and applying staples on opposite sides of the incision, thereby severing and anastomosing the tissue. Summary of the Invention

[0004] The solution disclosed herein is implemented in the following manner: A surgical instrument includes a body, a closing handle rotatably disposed on the body, a firing handle rotatably disposed on the body, and a locking assembly, the locking assembly including an operating element, a locking element connected to the operating element and disposed on the body, and a limiting portion connected to the closing handle; The closing handle has a first release position and a first closed position, and the firing handle has a second release position and a second closed position. During the process of the firing handle moving from the second release position to the second closed position, the firing handle moves along a first path. When the locking component is in the locked state, the locking member is in the locked position; in the locked position, at least part of the locking member is located in the first path to abut against the firing handle located in the first path, thereby preventing the firing handle from moving from the second release position to the second closed position; When the locking component is in the unlocked state, the locking member is in the unlocked position; in the unlocked position, the locking member leaves the first path, and in response to the firing handle being operated, the firing handle moves along the first path from the second release position to the second closed position; The path of the locking member moving 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 part is located in the first limiting position, and at least part of the limiting part located in the first limiting position is located in the unlocking path to prevent 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 part is located in the second limiting position, and the limiting part located in the second limiting position leaves the unlocking path. In response to the operation of the operation part, the locking member moves from the locked position to the unlocked position to switch the locking component from the locked state to the unlocked state.

[0005] In one embodiment, the locking member includes a blocking part and a moving part connected to the blocking part, the moving part being movably disposed on the body, and the operating member being connected to the moving part; When the locking member is in the locked position, at least a portion of the blocking part is located in the first path to abut against the firing handle located in the first path; when the locking member is in the locked position and the closing handle is in the first closed position, the limiting part is located in the second limiting position; in response to the operation of the operating member, the moving part moves relative to the body to move the locking member from the locked position to the unlocked position, in the unlocked position, the blocking part leaves the first path.

[0006] In one embodiment, the moving part is rotatably connected to the body; 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 part drives the blocking part to rotate so that the blocking part leaves the first path, so that the locking member moves from the locked position to the unlocked position.

[0007] In one embodiment, the moving part includes a central rotating part and a semi-circular part connected to the central rotating part, the semi-circular part surrounding the central rotating part, and a blocking part disposed at one end of the semi-circular part, the blocking part and the other end of the semi-circular part forming a notch; when the locking member is in the locked position, at least a portion of the blocking part is located in the first path to abut against 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 at least a portion of the notch is located in the first path to avoid the firing handle moving along the first path.

[0008] In one embodiment, the rotation axis of the moving part relative to the body coincides with the rotation axis of the closing handle.

[0009] In one embodiment, the moving part is movably disposed on the body; 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 part moves to drive the blocking part to move so that the blocking part leaves the first path, causing the locking member to move from the locked position to the unlocked position.

[0010] In one embodiment, the body has a movable groove, which is a through groove, and the operating member passes through the movable groove and is connected to the moving part; in response to the operating member being operated, the operating member drives the moving part to move along the movable groove, thereby driving the blocking part away from the first path, so that the locking member moves from the locked position to the unlocked position.

[0011] 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 released 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.

[0012] In one embodiment, the first limiting position is located at the beginning of the unlocking path, and the second limiting position is located at the 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 member moving from the second limiting position to the first limiting position, the limiting member drives the locking member to move in the opposite direction along the unlocking path, so that the locking member moves from the unlocking position to the locking position.

[0013] 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.

[0014] In one embodiment, the limiting part is rotatably connected to the closing handle, and the body includes a guide member that is actuatedly connected to the limiting part; In response to the closing handle rotating from the first release position to the first closed position, the limiting part performs a first rotation about the rotation axis of the closing handle; in response to the first rotation of the limiting part, the guide actuates the limiting part to perform a second rotation about its own rotation axis; the first rotation and the second rotation cause the limiting part to move from the first limiting position to the second limiting position.

[0015] In one embodiment, one of the limiting portion or the guide includes a limiting groove, and the other includes a positioning post, the positioning post being received within the limiting groove. In response to a first rotation of the limiting member, the positioning post slides within the limiting groove, and the positioning post abuts against the groove wall of the limiting groove to cause the limiting portion to undergo a second rotation.

[0016] In one embodiment, the guide includes a stop portion, wherein when the limiting portion is in the first limiting position, the stop portion is configured to abut against the limiting portion to prevent the limiting portion from performing the second rotation; in response to the first rotation of the limiting portion, the limiting portion moves away from the stop portion.

[0017] In one embodiment, the locking assembly further includes a transmission portion connected to the actuating member, the transmission portion being tractively connected to the locking member, the transmission portion moving in response to the actuating member being operated to drive the locking member from the locked position to the unlocked position.

[0018] In one embodiment, the transmission part includes a transmission rod, one end of which is connected to the operating member and the other end of which abuts against the locking member. In response to the operating member being operated, the transmission rod rotates to drive the locking member from the locked position to the unlocked position.

[0019] In one embodiment, the operating member is rotatably disposed on the outer casing of the machine body, and the locking member is rotatably disposed on the machine body, wherein the rotation axis of the locking member is offset from the rotation axis of the operating member. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a surgical instrument according to one embodiment of the present disclosure; Figure 2 This is a schematic diagram of the locking component in a first locked state according to an embodiment of the present disclosure; Figure 3 This is a schematic diagram of the internal structure of the locking component in a first locked state according to an embodiment of the present disclosure; Figure 4 This is a schematic diagram of the firing handle in the second release position and the second closed position according to an embodiment of the present disclosure; Figure 5 yes Figure 3 Schematic diagram of the structure at point A; Figure 6 This is a schematic diagram of the locking component in a second locked state according to an embodiment of the present disclosure; Figure 7 This is a schematic diagram of the internal structure of the locking component in a second locked state according to an embodiment of the present disclosure; Figure 8This is a schematic diagram of the locking component in the unlocked state according to an embodiment of the present disclosure; Figure 9 This is a schematic diagram of the internal structure of the locking component in the unlocked state according to an embodiment of the present disclosure; Figure 10a yes Figure 9 Schematic diagram of the structure at point B; Figure 10b This is a schematic diagram of the locking member in the locked position and the unlocked position according to an embodiment of the present disclosure; Figure 11 This is an exploded view of the operating part and the moving part according to one embodiment of the present disclosure; Figure 12 This is an exploded view of the operating part and the moving part according to one embodiment of this disclosure from another angle; Figure 13 yes Figure 3 Schematic diagram of the structure at point A; Figure 14 This is a schematic diagram of the structure of the moving part and the limiting part according to another embodiment of the present disclosure; Figure 15 This is a schematic diagram of a structure in which the moving part is movably connected to the body in one embodiment of the present disclosure; Figure 16 This is a schematic diagram of the structure in which the operating unit is operated according to one embodiment of the present disclosure; Figure 17 This is a schematic diagram of a structure in one embodiment of the present disclosure, showing the limiting member in the second limiting position and the locking member in the locking position; Figure 18 This is a schematic diagram of the locking member in the unlocked position according to one embodiment of the present disclosure; Figure 19 This is a schematic diagram of the structure in which the closed handle is in the first release position according to one embodiment of the present disclosure; Figure 20a yes Figure 19 Schematic diagram of the structure at point C; Figure 20b This is a schematic diagram of the stop portion in one embodiment of the present disclosure; Figure 20c This is a schematic diagram of the stop portion in another embodiment of the present disclosure; Figure 21 This is a schematic diagram of the closing handle in the first closed position according to an embodiment of the present disclosure; Figure 22 yes Figure 21 Schematic diagram of the structure at point D; Figure 23 This is a schematic diagram of the locking component in the unlocked state according to an embodiment of the present disclosure; Figure 24 yesFigure 23 Schematic diagram of the structure at point E; Figure 25 This is a schematic diagram of the structure of the operation unit according to another embodiment of the present disclosure; Figure 26 This is a schematic diagram of a surgical instrument structure according to another embodiment of the present disclosure; Figure 27 This is a schematic diagram of the closing handle in the first closed position according to another embodiment of the present disclosure; Figure 28 yes Figure 27 Schematic diagram of the structure at point F; Figure 29 This is a schematic diagram of the locking component in the unlocked state according to an embodiment of the present disclosure; Figure 30 yes Figure 29 A schematic diagram of the structure at point G.

[0021] in: 100. Body; 110. Sleeve assembly; 111. Outer sleeve; 120. Jaw assembly; 130. Handle; 140. Guide part; 141. Positioning post; 142. Stop surface; 143. Abutment surface; 150. Moving groove; 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; 300. Firing handle; 310. Actuating part; 320. Body part; 400. Locking assembly; 410. Operating element; 411. Transmission part; 412. Square groove; 413. Gasket; 414. Connecting part; 415. First receiving groove; 416. Second receiving groove; 417. Connecting groove; 401. Locking components; 420. Moving part; 421. Central rotating part; 422. Semi-circular part; 424. Notch; 425. Square protrusion; 430. Blocking part; 431. Blocking surface; 440. Abutting part; 450. Receiving part; 500. Jaw opening assembly; 510. Locking lever; 520. Unlock button; 600. Return tool; 700, connecting rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description, in conjunction with the accompanying drawings and embodiments, is provided. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0023] It is important to understand that the terms "proximal" and "distal" used in this article are relative to the clinician manipulating the surgical instrument. "Proximal" refers to the part closer to the clinician, while "distal" refers to the part farther from the clinician. That is, the handle is proximal, and the jaw assembly is distal. For example, the proximal end of a component refers to the end relatively closer to the handle, and the distal end refers to the end relatively closer to the jaw assembly. However, surgical instruments can be used in many orientations and positions, so these terms expressing relative positional relationships are not limited or absolute.

[0024] In this disclosure, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances. It should be noted that when a qualifier precedes "connection," it has the meaning defined by that qualifier, excluding only obviously excluding cases, but not other possible cases.

[0025] This 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 cutting blade assembly (not shown), a closing handle 200 rotatably disposed on the body 100, and a firing handle 300 rotatably disposed on the body 100. The cannula assembly 110 includes an inner cannula (not shown) and an outer cannula 111. The jaw assembly 120 is connected to the outer cannula 111. The closing handle 200 is drively connected to the outer cannula 111, and the closing handle 200 has a first release position and a first closed position. Figure 2 As shown, when the surgical instrument is not in use, the closing handle 200 is in the first released position, and the jaw assembly 120 is in the open state. Figure 6As shown, when the user needs to close the jaw assembly 120, pressing the closing handle 200 moves the closing handle 200 from the first release position to the first closed position. The movement of the closing 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 the closed state. After the closing handle 200 reaches the first closed position, it remains in the first closed position. The structure in which the closing handle 200 remains in the first closed position is described below.

[0026] The firing handle 300 is connected to the cutting blade assembly via a transmission mechanism, the specific implementation of which is described below. The firing handle 300 has a second release position and a second closed position. The cutting blade assembly includes a blade head (not shown in the figure), which is located within the jaw assembly 120. When the jaw assembly 120 is in the closed state, it clamps tissue. The user can press the firing handle 300 to move it from the second release position to the second closed position. This movement of the firing handle 300 drives the cutting blade assembly to fire. Firing refers to the distal movement of the cutting blade assembly, causing the blade head within the jaw assembly 120 to move distally to cut the tissue clamped within the jaw assembly 120. The surgical instrument also includes a return blade assembly and a jaw opening assembly. After the blade head moves distally to its extreme position, the user operates the return blade assembly to move the cutting blade assembly proximally back to its initial position before firing. At this time, the user can operate the jaw opening assembly 500 to open the jaw assembly 120, thereby moving the closing handle 200 from the first closed position to the first release position. The specific manner in which the cutting blade assembly returns to its initial position before firing, and the structure of the jaw opening assembly 500, are described below.

[0027] In actual surgical procedures, after the jaw assembly 120 closes and clamps the 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. That is, even when the jaw assembly 120 is closed, the appropriate firing timing may not have been reached. If the surgeon accidentally triggers the firing handle 300 during operation, the cutting blade assembly may fire, cutting unwanted tissue and causing surgical error.

[0028] In one existing solution, a locking structure is provided on the body 100 to restrict the closing of the firing handle 300, so as to avoid accidental closing of the firing handle 300. Both the locking structure and the firing handle 300 are provided with toothed structures. The two are engaged by the toothed structures. When firing is required, the locking structure is rotated to disengage from the position engaged with the firing handle 300. However, because the locking structure and the firing handle 300 are engaged by teeth, the locking structure is easily jammed by the toothed structures when rotating. The locking structure is not easy to disengage from the firing handle 300, which can easily cause unlocking failure. The user needs to operate multiple times to release the locking structure from restricting the closing of the firing handle 300.

[0029] like Figure 2 and Figure 3 As shown, the surgical instrument in this disclosure includes a locking assembly 400, which includes an operating member 410 disposed 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 process of the firing handle 300 moving from the second release position to the second closed position, the firing handle 300 moves along a first path; as Figure 4 As shown, during the above process, the firing handle 300 rotates around its own rotation axis, and the trajectory of the firing handle 300 from the second release position to the second closed position is the first path (where the solid line is the second release position and the dashed line is the second closed position).

[0030] 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 a portion of the locking member 401 is located on a 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 preventing the firing handle 300 from moving from a second release position to a second closed position. 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 located on the second release position to prevent movement of the firing handle 300, or that the locking member 401 in the locked position separates from the firing handle 300 located on the second release position. In response to the firing handle 300 moving 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, meaning that the locking member 401 is no longer located on the first path. That is, the locking member 401 in the unlocked position will not block the firing handle 300 from moving along the first path. In response to the user's operation of the firing handle 300, the firing handle 300 moves from the second release position to the second closed position.

[0031] The path that the locking component 401 moves from the locked position to the unlocked position is the unlocking path, wherein... Figure 10b The solid line indicates that the locking member 401 is in the locked position, and the dashed line indicates that the locking member 401 is 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 part 240 is in the first limiting position. At least part of the limiting part 240 in the first limiting position is located in the unlocking path to prevent the locking member 401 from moving from the locked position to the unlocked position.

[0032] When the locking assembly 400 is in the locked state and the closing handle 200 is in the first closed position, the limiting part 240 is in the second limiting position. The limiting part 240 in the second limiting position leaves the unlocking path; "leaving" here means that the limiting part 240 is no longer 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, thereby switching the locking assembly 400 from the locked state to the unlocked state.

[0033] 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, preventing the firing handle 300 from being operated and closed. This prevents the cutting blade assembly from cutting the tissue, thus avoiding undesirable cuts. 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. This allows the firing handle 300 to be operated and closed, enabling the cutting blade assembly to cut the tissue.

[0034] In the locked state, the locking member 401 abuts against the firing handle 300 located in the first path to prevent 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 disengages from the firing handle 300 and no longer abuts against the firing handle 300 located in the first path. By abutting against the firing handle 300 located in the first path to limit the firing handle 300, the locking member 401 can smoothly move relative to the firing handle 300 from the locked position to the unlocked position, avoiding the situation where the locking member 401 cannot move to the unlocked position and the unlocking fails.

[0035] When the surgical instrument is not in use, the closing handle 200 is in the first released position, the firing handle 300 is in the second released position, the locking component 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 part 240 is in the first limiting position, restricting the movement of the locking member 401 from the locked position to the unlocked position. In this situation, 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, preventing the locking component 400 from being in the unlocked state prematurely, which would prevent the firing handle 300 from being limited after the jaw assembly 100 is closed. When the locking member 401 is in the locked position and the closing handle 200 is in the first closed position (i.e., the jaw assembly 120 is closed), the limiting part 240 is in the second limiting position, and the operating member 410 can be operated by the user to switch the locking component 400 to the unlocked state, thereby releasing the limitation on the firing handle 300.

[0036] For example, the locking state includes a first locking state and a second locking state. When the locking member 401 is in the locked position and the closing handle 200 is in the first released 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 switches from the second locked state to the unlocked state.

[0037] The locking member 401 includes a blocking part 430 and a moving part 420 connected to the blocking part 430. The moving part 420 is movably connected to the body 100, and the operating part 410 is connected to the moving part 420. When the locking member 401 is in the locked position, at least a portion of the blocking part 430 is located in the first path, abutting 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 part 430 leaves the first path and no longer abuts against the firing handle 300 located in the first path, allowing the firing handle 300 to move smoothly from the second released position to the second closed position.

[0038] 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 operation unit 410, the moving part 420 moves relative to the body 100. The moving part 420 drives the blocking part 430 to move, so that the locking member 401 moves from the locked position to the unlocked position.

[0039] In one embodiment, such as Figure 7 to Figure 10a As shown, the moving part 420 is rotatably connected to the body 100, and the operating member 410 is connected to the moving part 420. The rotation of the operating member 410 relative to the body 100 can drive the moving part 420 to rotate relative to the body 100.

[0040] 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 member 410 being operated, the operation member 410 drives the moving part 420 to rotate, and the moving part 420 drives the blocking part 430 to rotate, so that the blocking part 430 leaves the first path, so that the locking member 401 moves from the locked position to the unlocked position.

[0041] The locking member 401 moves from the locked position to the unlocked position by rotation. The unlocking path of the locking member 401 is the path of its movement as it rotates around the rotation axis of the moving part 420. In one embodiment, as... Figure 10a to Figure 12As shown, the moving part 420 includes a central rotating part 421 and a semi-circular part 422 connected to the central rotating part 421. The semi-circular part 422 is arranged around the central rotating part 421 and is fixedly connected to the central rotating part 421, or it can be integrally formed. The semi-circular part 422 is an incomplete ring, which can be a major arc, a minor arc, or a semicircle. A blocking part 430 is provided at one end of the semi-circular part 422, and the blocking part 430 and the other end of the semi-circular part 422 form 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 portion 430 is located in the first path, and the notch 424 is away from the first path, allowing the locking member 401 to block the firing handle located in the first path through the blocking portion 430; when the locking member 401 is in the unlocked position, the blocking portion 430 is away from the first path, and at least part of the notch 424 is located in the first path, allowing the locking member 401 to avoid the firing handle 300 located in the first path through the notch 422. Thus, the locking assembly 400 does not obstruct the firing handle 300 moving along the first path when in the unlocked state. In one embodiment, such as... Figure 13 As shown, the blocking part 430 includes a blocking surface 431, which is, for example, arc-shaped. The blocking surface 431 is configured such that at least a portion of it is 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, which is moving along the first path, via the blocking surface 431. For example, when the firing handle 300 is in the second released position, the blocking surface 431 abuts against the firing handle 300 to prevent the firing handle 300 from moving along the first path. Alternatively, when the firing handle 300 is in the second released position, the blocking surface 431 separates from the firing handle 300. In response to the firing handle 300 moving along the first path, the blocking surface 431 abuts against the firing handle 300 to prevent the firing handle 300 from moving along the first path. When the locking member 400 is in the unlocked state, the blocking surface 431 leaves the first path, allowing the firing handle 300 to move along the first path, thereby allowing the firing handle 300 to move from the second released position to the second closed position. The blocking surface 431 can also be other shapes.

[0042] The aforementioned blocking part 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 release position to the second closed position, the blocking part 430 abuts against the firing handle 300 to prevent its movement. When the user presses the firing handle 300, it applies force to the blocking part 430, but the movement trajectory of the blocking part 430 is arc-shaped. The force applied by the firing handle 300 to the blocking part 430 does not cause it to move in an arc shape, making it difficult for the blocking part 430 to disengage from the locked position. In other words, the blocking part 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 in the event of accidental activation of the firing handle 300.

[0043] The arc-shaped arrangement of the blocking surface 431 allows the locking member 401 to move smoothly from the locked position to the unlocked position. When the locking assembly 400 is in the locked state, the firing handle 300 is in contact with the blocking part 430, or the blocking part 430 is located at a certain distance from the firing handle 300 along the first path. The blocking surface 431 extends along the first arc, that is, the first arc is in contact with or at a certain distance 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 locked position to the unlocked position, the locking member 401 moves along the unlocking path, and the blocking surface 431 rotates around the rotation axis of the moving part 420. The blocking surface 431 rotates along the first arc, and the blocking surface 431 rotating along the first arc will not interfere with the firing handle 300, so that the firing handle 300 will not interfere with the locking member 401 moving along the unlocking path, further allowing the locking member 401 to move smoothly from the locked position to the unlocked position.

[0044] For example, the rotation axis of the moving part 420 coincides with the rotation axis of the closing handle 200. The closing handle 200 includes a handle part 210 and a rotation shaft 220. The rotation shaft 220 is arranged along a first rotation axis K1. When the user operates the closing handle 200, the closing handle 200 rotates around the first rotation axis K1. For example, both ends of the rotation shaft 220 are engaged with the body 100, and the rotation shaft 220 passes through 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 to the rotation shaft 220. For example, the moving part 420 is sleeved on the rotation shaft 220. 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 limit the rotation axis of the moving part 420, so that the position of the moving part 420 is stable.

[0045] During the switching process between the first release position and the first closed position of the closing handle 200, the handle part 210 rotates around the first rotation axis K1, and the rotation axis 220 does not rotate or move. Therefore, the moving part 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 closed position, the locking member 401 can be stably kept in the locked position.

[0046] In one embodiment, such as Figure 7 As shown, the closing handle 200 also includes a plate portion 230 connected to the handle portion 210. The handle portion 210 is for user operation, and the plate portion 230 is located above the handle portion 210 and acts on the closing mechanism to drive the jaw assembly 120 to close. The specific structure of the closing mechanism is described below. For example, the aforementioned limiting portion 240 is fixedly disposed on the plate portion 230. For example, as... Figure 7 and Figure 12 As shown, in the thickness direction of the plate body 230, the plate body 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 part 430 protrudes along the thickness direction of the plate body 230, and the blocking part 430 is opposite to the firing handle 300, so that the blocking part 430 can block the firing handle 300 located in the first path.

[0047] In another embodiment, such as Figure 14 to Figure 17 As shown, the moving part 420 is movably disposed on the machine body, and the operating member 410 is connected to the moving part 420. The operating member is movably disposed on the outer surface of the machine body. When the closing handle 200 is in the first closed position and the locking member 410 is in the locked position, the moving part 420 moves relative to the machine body 100 in response to the operation of the operating member 410, causing the blocking part 430 to move so that the blocking part 430 leaves the first path, and causing the locking member 401 to move from the locked position to the unlocked position. Figure 18 The locking mechanism is in the unlocked position.

[0048] For example, such as Figure 16As shown, the body 100 has a sliding groove 150, which is a through groove. The operating member 410 cooperates with the sliding groove 150 and can slide along the length direction of the sliding groove 150. The operating member 410 passes through the sliding groove 150 into 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 sliding groove 150. In response to the operating member 410 moving along the length direction of the sliding groove 150 to the other end of the sliding groove 150, the operating member 410 moves from the locked position to the unlocked position. During the above process, the locking member 401 moves away from the firing handle 300 to leave the first path.

[0049] For example, locking member 401 moves with operating member 410, from Figure 17 Position moved to Figure 18 The position is shown in Figure 17, where the dotted line represents the unlocking path of the locking member 401. 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 released position, the limiting part 240 is in the first limiting position, blocking the movement of the locking member 401 towards the unlocked position. For example, the blocking part 430 is located on the side of the moving part 420 near the firing handle 200. For example, the blocking part 430 includes the side wall of the moving part 420 near the firing handle 200, placing the blocking part 430 in the first path. When the closing handle 300 moves from the first released position to the first closed position, the limiting part 240 rotates with the closing handle 300, moving from the first limiting position to the second limiting position. Figure 15 and Figure 17 As shown, the limiting part 240 located at the second limiting position leaves the unlocking path and no longer obstructs the movement of the locking member 401, allowing the locking member 401 to move smoothly from the locked position to the unlocked position. In one embodiment, as... Figure 4 , Figure 5 and Figure 10a As shown, the firing handle 300 includes a body portion 320 and an action portion 310 disposed on the body portion 320. The action portion 310 is disposed on the upper part of the body portion 320. When the locking member 401 is in the locked position, the action portion 310 corresponds to the locking member 401. Here, "corresponding" means that the action portion 310 and the locking member 401 abut against each other or are spaced apart by a certain distance. The locking member 401 is configured to abut against the action portion 310 located in the first path to prevent the firing handle 300 from moving along the first path. For example, the action portion 310 corresponds to the blocking surface 431.

[0050] In embodiments of this disclosure, a user can operate the locking component 400 with one hand to switch it from a locked state to an unlocked state. For example... Figure 6As shown, the body 100 also includes a handle 130. When operating the surgical instrument, the user holds the handle 130 and presses the closing handle 200 and the firing handle 300 with their fingers. The operating member 410 protrudes from the body 100 and is located above the handle 130. "Above" here does not only refer to directly above the handle 130; the operating member 410 can also be located to the upper left or upper right of the handle 130. When the surgical instrument is not in use, the locking component 400 is in a first locked state. The user holds the handle 130 and presses the closing handle 200 with their fingers, causing the closing handle 200 to move from a first released position to a first closed position, switching the locking component 400 from the first locked state to a second locked state. Then, the user can operate the operating member 410 with the thumb of the hand holding the handle, causing the operating member 410 to move along... Figure 6 Rotate in the direction of the middle arrow, or cause the operating element 410 to move along... Figure 16 The movement in the direction of the middle arrow causes the locking member 401 to move from the locked position to the unlocked position, thereby switching the locking component 400 from the second locked state to the unlocked state.

[0051] In embodiments where the moving part 420 is rotatably disposed 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 Figure 12 As shown, the operating member 410 is provided with a connecting portion 414, and the connecting portion 414 has a square groove 412. The moving part 420 is provided with a square protrusion 425, which is embedded in the square groove 412, so that the operating member 410 and the moving part 420 are connected, and the operating member 410 can drive the moving part 420 to rotate. For example, the operating member 410 also includes a washer 413, which is disposed between the connecting portion 414 and the moving part 420 to improve the stability of the connection between the operating member 410 and the moving part 420.

[0052] For example, one of the body 100 and the operating element 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 receiving groove 415 and a second receiving groove 416. When the locking member 401 is in the locked position, the protrusion is received and held in the first receiving groove 415. When the locking member 401 is in the unlocked position, the protrusion is received and held in the second receiving groove 416. Thus, the locking member 410 can be held in the unlocked position or in the locked position.

[0053] 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 operated. When the user operates the operating member 410, the force of the operation can overcome the limitation of the first receiving groove 415, allowing the locking member 401 to be operated smoothly and move. For example, the operating member 410 also includes a connecting groove 417 connecting 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 connecting groove 417. The connecting groove 417 limits the movement trajectory of the operating member 410, making the movement of the operating member 410 more stable.

[0054] For example, when the operating element 410 is in contact with the body and the locking element 401 is in the locked position, the friction between the operating element 410 and the body 100 keeps the locking element 401 more stably in the locked position. When the locking element 401 is in the unlocked position, the friction between the operating element 410 and the body 100 keeps the locking element 401 more stably in the unlocked position. When the user operates the operating element 410, the force of the operation can overcome the friction between the operating element 410 and the body 100, allowing the locking element 401 to be operated smoothly and move. For example, a damping plate can be provided on the side of the operating element 410 near the body 100 to increase the friction between the operating element 410 and the body 100, so that the locking element 401 can be better maintained in the unlocked or locked position.

[0055] For example, the operating component 410 includes a magnetic member, and the body 100 includes a first magnetic mating part and a second magnetic mating part (not shown in the figure). When the locking member 401 is in the locked position, the magnetic member and the first magnetic mating part generate a magnetic attraction force, making the locking member 401 more stably held in the locked position. When the locking member 401 is in the unlocked position, the magnetic member and the second magnetic mating part generate a magnetic attraction force, making the locking member 401 more stably held in the unlocked position. When the user operates the operating component 410, the operating force can overcome the above-mentioned magnetic attraction force, allowing the locking member 401 to be operated smoothly and move. For example, the magnetic member includes a magnet, and the first magnetic mating part and the second magnetic mating part include magnetic metal. Another example is that the operating component 410 includes magnetic metal, and the first magnetic mating part and the second magnetic mating part include magnets.

[0056] The closing handle 200 moves from the first release position to the first closed position, causing the jaw assembly 120 to close, which is achieved by the following structure: like Figure 1 and Figure 7As shown, the jaw assembly 120 includes a staple cartridge seat and a staple anchor seat. The staple anchor seat is rotatably connected to the staple cartridge seat and 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 staple anchor seat and the staple cartridge seat are at a certain angle to each other, so that the jaw assembly 120 is in the 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 distally moving outer sleeve 111 drives the staple anchor seat to rotate relative to the staple cartridge seat until the staple anchor seat is substantially parallel to the staple cartridge seat, thereby switching the jaw assembly 120 from the open state to the closed state.

[0057] For example, a surgical instrument includes a link 700, the proximal end of which is rotatably connected to the plate portion 230 of the closing handle 200, and the distal end of which is rotatably connected to the proximal end of the outer sleeve 111. In response to the closing handle 200 moving from a first release position to a 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. The closing handle 200 maintains its position in the first closed position after moving to the first closed position through the following structure: like Figure 3 and Figure 7 As shown, the surgical instrument also includes a jaw opening assembly 500, which includes a locking lever 510 and an unlocking button 520 connected to the locking lever 510, for example, as Figure 3 As shown, when the closing handle 200 is in the first released position, the plate body 230 separates from the locking lever 510, allowing the closing handle 200 to move from the first released position to the first closed position; as Figure 7 As shown, when the closing handle 200 moves to the first closed position, the jaw assembly 120 closes, and 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 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. The unlocking button 520 drives the locking lever 510 to rotate upward, causing the locking lever 510 to separate from the plate portion 230. The locking lever 510 no longer abuts against the plate portion 230. The closing handle 200 also includes an elastic reset member (not shown in the figure) disposed on the first rotation axis K1. After the locking lever 510 separates 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.

[0058] For example, the locking lever 510 has a first hook, and the plate body 230 is provided with a second hook. Figure 7(Not shown in the image) When the closing handle 200 is in the first release position, the second hook separates from the first hook, allowing the closing handle 200 to move from the first release position to the first closed position; as shown in the image. Figure 7 As shown, when the closing handle 200 moves to the first closed position, the jaw assembly 120 closes. Simultaneously, the first hook and the second hook engage to prevent the closing handle 200 from moving to the first release position, thus 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 drives the first component away from the second hook, releasing the lock on the closing handle 200. The closing handle 200 also includes an elastic reset member (not shown in the figure) disposed on the first rotation axis K1. After the locking rod 510 separates from the plate portion 230, the elastic reset member drives the closing handle 200 from the first closed position to the first release position, opening the jaw assembly 120.

[0059] The specific implementation methods described above, as well as those described in the text, are all applicable to the locking component in this disclosure to implement its functionality.

[0060] The overall operating procedure for surgical instruments is as follows: When surgical instruments are not in use, such as 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 user operate the operating member 410.

[0061] The user aligns the jaw assembly 120 with the human tissue to be clamped, such as... Figure 6 and Figure 7 As shown, pressing the closing handle 200 moves it from the first release position to the first closed position, closing the jaw assembly 120. 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 part 240 moves with the closing handle 200 to leave the unlocking path. At this time, the locking component 400 is in the second locked state and can be operated to switch from the locked state to the unlocked state.

[0062] like Figure 8 to Figure 10aAs shown, the user operates the operating member 410, for example, by turning the operating member 410, which drives the moving part 420 and the blocking part 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, which drives the moving part 420 and the blocking part 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 part 430 leaves the first path, and the blocking part 430, having left the first path, no longer obstructs the movement of the actuating part 310 of the firing handle 300, thereby allowing the firing handle 300 to be pressed.

[0063] like Figure 4 As shown in Figure 10, pressing the firing handle 300 moves it from a second released position to a second closed position. During this movement, the firing handle 300 drives the cutting blade assembly 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, driving the rack to move the cutting blade assembly distally. Repeated pressing of the firing handle 300 moves the cutting blade assembly distally until the cut is complete, thus cutting the clamped tissue. Alternatively, the surgical instrument includes a motor connected to the cutting blade assembly for driving the cutting blade assembly 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 drives the cutting blade assembly distally to cut the clamped tissue.

[0064] After the cutting blade assembly has cut to the bottom, in response to the user's operation, the cutting blade assembly moves proximally to return to its position before cutting. For example, as Figure 6 As shown, the surgical instrument includes a retraction assembly 600, which is connected to the cutting blade assembly. The retraction assembly 600 protrudes from the body 100 and is connected to the cutting blade assembly. The user can retract the retraction assembly 600 proximally to move the cutting blade assembly proximally, thus completing the retraction. Alternatively, the surgical instrument may include a motor connected to the cutting blade assembly. A firing handle 300 is electrically connected to the motor. After cutting, releasing the firing handle 300 switches it to a second release position, and the motor drives the cutting blade assembly proximally to complete the retraction.

[0065] After the cutter returns to its original position, as follows: Figure 9As shown, the firing handle 300 is in the second released state, and the closing 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 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 unlock button 520. The locking button drives the locking lever 510 to rotate, causing the locking lever 510 to disengage from the plate body 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 released position. During the movement of the closing handle 200 from the first closed position to the first released position, it drives the limiting part 240 to move. During the movement of the limiting part 240 from the second limiting position to the first limiting position, it pushes against the locking member 401, thereby driving the locking member 401 from the unlocked position to the locked position, so that the locking assembly 400 switches from the unlocked state to the locked state. For example, as Figure 3 to Figure 9 ,as well as Figure 14 to Figure 18As shown, when the limiting part 240 is in the first limiting position, it is at the beginning of the unlocking path; when the limiting part 240 is in the second limiting position, it is at the 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 approximately the same as the unlocking path. When the locking member 401 is in 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 end of the unlocking path to the beginning of the unlocking path, that is, it moves in the reverse direction along the general unlocking path, thereby driving the locking member 401 to move in the reverse direction along the unlocking path, causing the locking member 401 to move from the unlocking position to the locked position. Specifically, when the locking member 401 moves from the locked position to the unlocking position, it moves in the forward direction along the unlocking path; when it moves from the unlocking position to the locked position, it moves in the reverse direction along the unlocking path. During the above process, the firing handle 300 is not driven and remains in the second released state, ensuring that the actuating part 310 is not located on the first path and does not obstruct the movement of the locking member 401, allowing the locking assembly 400 to smoothly switch from the unlocked state to the locked state. After the jaw assembly 120 is opened, the firing handle 300 remains in the second released state, while the closing handle 200 is in the first released state, and the locking member 401 is in the locked position. The states of the firing handle 300, closing handle 200, and locking assembly 400 are the same as when the surgical instrument is not in use, allowing the surgical instrument to be used again. When the locking assembly 400 is in the first locked state, the limiting part 240 blocks the abutment part 440 of the locking member 401, preventing the locking member 401 from rotating from the locked position to the unlocked position. When the closing handle 200 moves from the first release position to the first closed position, it rotates by a first angle relative to the first rotation axis K1, driving the limiting part 240 to rotate by the first rotation axis K1 by the same first angle. The limiting part 240 then rotates by the first rotation axis K1 to move away from the abutment part 440. The rotation of the limiting part 240 driven by the closing handle 200 provides space for the abutment part 440 to move along the unlocking path. In embodiments where the limiting part 240 is fixedly disposed on the closing handle 200, when the closing handle 200 moves from the first release position to the first closed position, the limiting part 240 rotates by the first rotation axis K1 by the first angle. For example, the locking member 404 rotates towards the limiting part 240 to unlock, and the angle of rotation is, for example, less than or equal to the first angle, such as 15°-30°.

[0066] In one embodiment, such as Figure 19 to Figure 24 As shown, the limiting part 240 is rotatably connected to the closing handle 200, and the body 100 also includes a guide 140, which is actuatedly connected to the limiting part 240.

[0067] In response to the closing handle 200 rotating from the first release position to the first closed position, the limiting part 240 performs a first rotation about the rotation axis of the closing handle 200. This first rotation is the limiting part 240 rotating about the first rotation axis K1. In response to the first rotation of the limiting part 240, the guide member 140 actuates the limiting part 240, causing it to perform a second rotation about its own rotation axis, thus moving the limiting part 240 from the first limiting position to the second limiting position. For example, the limiting part 240 performing the first rotation acts on the guide member 140, and the guide member 140 generates a reaction force acting on the limiting part 240, causing the limiting part 240 to perform the second rotation. The rotation axis of the limiting part 240 itself is the second rotation axis K2, and both the first and second rotations cause the limiting part 240 to disengage from the locking member 401. The departure from the locking member 401 refers to the first rotation and the second rotation both rotating in the direction of leaving the locking member 401. The second rotation allows the locking member 401 to have a larger movement space when moving along the unlocking path, and increases 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 and thus improving the user's operating feel.

[0068] 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 part 240 to rotate around the first rotation axis K1 by a first angle, that is, the first rotation of the limiting part 240 rotates by a first angle. The guide part 140 acts on the limiting part 240 to cause the limiting part 240 to rotate around the second rotation axis K2 by a second angle, that is, the second rotation of the limiting part 240 rotates by a second angle. Since both the first rotation and the second rotation are 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 at which the user can operate the operating member 410 can rotate is 30-60°. This increases the angle at which the user can operate the operating member 410, thereby improving the user's operating feel.

[0069] like Figure 19 to Figure 22 As shown, either the limiting part 240 or the guiding part 140 includes a limiting groove 241, and the other includes a positioning post 141. In response to a first rotation of the limiting part 240, the positioning post 141 slides within the limiting groove 241, and the positioning post 141 abuts against the groove wall of the limiting groove 241, so that the limiting part 240 performs a second rotation.

[0070] For example, the limiting part 240 includes a limiting groove 241, and the guiding part 140 includes a positioning post 141. The positioning post 141 is fixedly disposed in the body 100 and is housed 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 closed position, the closing handle 200 drives the limiting groove 241 to rotate around the first rotation axis K1, that is, the first rotation. When the limiting groove 241 performs its first rotation, the outer edge of the positioning post 141 abuts against the inner wall of the limiting groove 241. The limiting groove 241 is an irregularly shaped groove, and its extension direction is different from the trajectory of the limiting part 240 rotating around the first rotation axis K1. This causes a force to be generated between the positioning post 141 and the inner wall of the limiting groove 241, thereby driving the limiting part 240 to rotate around the second rotation axis K2. That is, the positioning post 141 acts on the limiting groove 241 of the limiting part 240, causing the limiting part 240 to perform its second rotation. Similarly, when the limiting part 240 includes the positioning post 141 and the guide 140 includes the limiting groove 214, in response to the first rotation of the limiting part 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 part 240, causing the limiting part 240 to perform its second rotation.

[0071] In one embodiment, such as Figure 20a and Figure 20b As shown, the guide 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 prevent the limiting portion 240 from performing a second rotation. In response to the first rotation of the limiting portion 240, the limiting portion 240 moves away from the stop portion 150.

[0072] When the locking component 400 is in the first locked state, the limiting part 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 from the locked position to the unlocked position, the limiting part 240 abuts against the locking member 401 to block the movement of the locking member 401. Since the limiting part 240 is rotatably disposed on the plate part 230, when the user applies a large operating force to the operating member 410, the locking member 401 may drive the limiting part 240 to rotate (perform a second rotation) when it moves along the unlocking path. If the limiting member rotates under the drive of the locking member 401, the rotated limiting part 240 provides movement space for the locking member 401 to move to the unlocked position, causing the limiting part 240 to fail to block the locking member 401.

[0073] The stop portion 150 abuts against the limiting portion 240 to prevent the limiting portion 240 from performing a second rotation, so that the limiting portion 240 can be more stably maintained in the first limiting position and better limit the locking member 401. During the process of the closing handle 200 moving from the first release position to the first closed 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 guide portion 140 acts on the limiting portion 240 to make the limiting portion 240 perform a second rotation, so that the limiting portion 240 can move smoothly to the second limiting position.

[0074] For example, such as Figure 20a and Figure 20b As shown, the limiting part 240 includes a limiting groove 241, and the guiding part 140 includes a positioning post 141. For example, the second rotation is a clockwise rotation. Figure 20b As shown, the limiting groove 241 includes two side groove walls 243, a first end 242 connecting the two side groove walls 243, and a second end 244 connecting the two side groove walls 243. The positioning post 141 includes a stop surface 142 corresponding to the first end 242 and an abutment surface 143 corresponding to the side groove wall 243. The stop portion 150 includes the aforementioned stop surface 142. When the limiting portion 240 is in the first limiting position, the stop surface 142 abuts against the first end 242 to prevent the limiting portion 240 from performing a second rotation (clockwise rotation), thereby keeping the limiting portion 240 in the first limiting position. In response to the first rotation of the limiting part 240, the positioning post 141 moves away from the first end 242 and toward the second end 244, causing the stop surface 142 to separate from the first end 242. The stop surface 142 no longer abuts against the limiting part 240, and the positioning post 141 acts on the side groove wall 243 through the abutment surface 143, causing the limiting part 240 to rotate a second time. When the limiting part 240 is in the second limiting position, the positioning post 141 abuts against the second end 244.

[0075] For example, such as Figure 20cAs shown, the limiting part 240 includes a positioning post 141, and the guiding part includes a limiting groove 241. The second rotation is clockwise. 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 combined 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 sidewall 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 prevent the limiting part 240 from performing the second rotation (clockwise rotation) and thus keep 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. The stop surface 142 no longer abuts against the limiting part 240, and the side groove wall 243 of the limiting groove 241 acts on the positioning post 141, causing the limiting part 240 to perform a second rotation. When the limiting part 240 is in the second limiting position, the positioning post 141 abuts against the first end 243.

[0076] After the closing handle 200 moves from the first release position to the first closed position, the limiting part 240 is in the second limiting position. In response to the user's operation of the operating member 410, the moving part 420 rotates with the operating member 410 until the abutting part 440 abuts against the limiting part 240, so that the locking component 400 is in the unlocked state. The user operates the firing handle 300 to drive the cutting blade assembly to fire, and after firing to the bottom, the blade is retracted. After the blade is retracted, the user operates the jaw opening component 500 to open the jaw assembly 120 and move the closing handle 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 closing handle 200 rotates around the first rotation axis K1, driving the limiting part 240 to perform a third rotation, which is the reverse motion of the first rotation. At the same time, the positioning pin 141 moves within 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), performing the fourth rotation. The fourth rotation is the reverse motion 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.

[0077] 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 member 401. The aforementioned movement of the limiting part 240 drives the locking member 401 to move from the unlocked position to the locked position, thereby causing the locking component to switch from the unlocked state to the first locked state.

[0078] In another embodiment, such as Figure 25 to Figure 30As shown, the locking assembly 400 includes a transmission part 411 connected to the operating member 410. The transmission part 411 is connected to the locking member 401 in a transmission manner. In response to the user's operation of the operating member 410, the operating member 410 drives the transmission part 411 to move, and the transmission part 411 drives the locking member 401 to move from the locked position to the unlocked position, so that the locking assembly 400 switches from the locked state to the unlocked state.

[0079] The operating element 410 is connected to the moving part 420 via the transmission part 411, so that the operating element 410 does not need to be directly connected to the moving part 420. As a result, the position of the operating element 410 is no longer restricted by the position of the locking element 401. The operating element 410 can be set at any position of the machine body 100. The position setting of the operating element 410 can be more ergonomic, making it more convenient and comfortable for users to operate the operating element 410.

[0080] For example, the operating element 410 is rotatably disposed on the outer shell of the machine body 100, and the locking element 401 is rotatably disposed on the machine body, and the rotation axis of the locking element 401 is offset from the rotation axis of the operating element 410. "Offset from each other" means that the rotation axis of the locking element 401 and the rotation axis of the operating element 410 are not concentric.

[0081] For example, the transmission part 411 includes a transmission rod 4111, one end of which is connected to the operating member 410 and the other end abuts against the locking member 401. In response to the operating member 410 being operated, the transmission rod 4111 moves to drive the locking member 401 from the locked position to the unlocked position.

[0082] For example, the locking member 401 includes the aforementioned moving part 420, blocking part 430, and receiving part 450 connected to the moving part 420. The moving part 420 is rotatably disposed on the machine body, and the transmission part 411 is rotatably disposed on the machine body. The receiving part 450 abuts against the transmission part 411 so that the transmission part 411 is connected to the locking member 401 in a transmission connection.

[0083] The receiving portion 450 protrudes from the moving portion 420, and the transmission rod 4111 abuts against the receiving portion 450. For example, the transmission portion 4111 is located below the receiving portion 450 and abuts against the lower part 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 locked state, the limiting member 240 abuts against the abutting portion 440 to restrict the movement of the locking member 401 from the locked position to the unlocked position. When the locking assembly 400 is in the second locked state, the limiting portion 240 separates from the abutting portion 440. In response to the operation of the operating member 410, the transmission portion 411 rotates clockwise, applying an upward force to the receiving portion 450 to cause the moving portion 420 to rotate counterclockwise. The counterclockwise rotating moving portion 420 drives the blocking portion 430 away from the first path, causing the locking member 401 to move from the locked position to the unlocked position, thereby switching the locking assembly 400 from the second locked state to the unlocked state.

[0084] When the locking component 400 is in the unlocked state, in response to the user's operation of the jaw opening component 500, the closing handle 200 moves from the first closed position to the first released position, and the limiting part 240 moves from the second limiting position to the first limiting position, generally moving in the opposite direction along the unlocking path. The limiting part 240 abuts against the abutment part 440, driving the locking member 401 to move in the opposite direction along the unlocking path from the unlocked position to the locked position. During the process of the locking member 401 moving from the unlocked position to the locked position, the receiving part 450 rotates with the locking member 401, for example, the receiving part 450 rotates counterclockwise. The lower side of the receiving part 450 abuts against the transmission part 411. The counterclockwise rotating receiving part 450 drives the transmission part 411 to rotate, thereby driving the operating member 410 to rotate to the position before it was operated, that is, the operating member 410 is reset, and the locking component 400 switches from the unlocked state to the first locked state.

[0085] exist Figure 25 to Figure 30 In this embodiment, the limiting part 240 may also be rotatably disposed on the plate part 230, and the body 100 is provided with the guide part 140. When the closing handle 200 rotates from the first release position to the first closed position, the limiting part 240 performs a first rotation and a second rotation to move from the first limiting position to the second limiting position. The structure of the limiting part 240 and the guide part 140 is similar to... Figure 19 to Figure 24 The same applies to the embodiments. This allows the position and angle of the operating element 410 to be adjusted, facilitating comfortable operation by the user.

[0086] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard 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.

[0087] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this disclosure and are not intended to limit the scope of protection of this disclosure. All equivalent implementations or modifications made without departing from the spirit of the art of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A surgical instrument, characterized by, The locking assembly comprises an operating member, a locking member connected with the operating member and arranged on the body, and a limiting part connected with the closing handle; The closing handle has a first release position and a first closing position, and the firing handle has a second release position and a second closing position, the firing handle moving along a first path during movement from the second release position to the second closing position; When the locking assembly is in a locked state, the locking member is in a locked position; In the locked position, the locking member is at least partially located in the first path to resist the firing handle located in the first path, thereby blocking the movement of the firing handle 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 moves away from the first path, and 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; The path of the locking member moving from the locked position to the unlocked position is an unlocking path; when the locking member is in the locked position and the closing handle is in the first release position, the limiting part is in a first limiting position, and the limiting part in the first limiting position is at least partially located in the unlocking path to block the movement of the locking member 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 part is in a second limiting position, and the limiting part in the second limiting position is away from the unlocking path, and in response to the operating part being operated, the locking member moves from the locked position to the unlocked position to switch the locking assembly from the locked state to the unlocked state.

2. The surgical instrument of claim 1, wherein, The locking member comprises a blocking part and a moving part connected with the blocking part, the moving part being movably arranged on the body, and the operating member being connected with the moving part; When the locking member is in the locked position, the blocking part is at least partially located in the first path to resist the firing handle located in the first path; when the locking member is in the locked position and the closing handle is in the first closing position, the limiting part is in the second limiting position, and in response to the operating member being operated, the moving part moves relative to the body to drive the blocking part to move away from the first path, so that the locking member moves from the locked position to the unlocked position.

3. The surgical instrument of claim 2, wherein, The body is provided with a moving groove, the moving groove is a through groove, the operating member penetrates through the moving groove and is connected with the moving part; in response to the operating member being operated, the operating member drives the moving part to move along the moving groove, thereby driving the blocking part to move away from the first path, so that the locking member moves from the locked position to the unlocked position.

4. The surgical instrument of claim 1, wherein, When the closure handle is in the first closure position and the locking member is in the unlocked position, the limiting member is moved 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 in response to the closure handle being moved from the first closure position to the first release position.

5. The surgical instrument of claim 4, 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; the limiting member drives the locking member to move reversely along the unlocking path to move the locking member from the unlocked position to the locked position in response to the limiting member being moved from the second limiting position to the first limiting position when the closure handle is in the first closure position and the locking member is in the unlocked position.

6. The surgical instrument of claim 1, wherein, The limiting part is fixedly connected to the closure handle or integrally formed with the closure handle; the limiting part is moved from the first limiting position to the second limiting position in response to the closure handle being moved from the first release position to the first closure position.

7. The surgical instrument of claim 1, wherein, The limiting part is rotatably connected to the closure handle, and the machine body comprises a guide member which is actuable connected with the limiting part; The limiting part performs first rotation around the rotation axis of the closure handle in response to the closure handle being rotated from the first release position to the first closure position, and the guide member actuates the limiting part to perform second rotation around the rotation axis of the limiting part in response to the first rotation of the limiting part; the first rotation and the second rotation move the limiting part from the first limiting position to the second limiting position.

8. The surgical instrument of claim 7, wherein, One of the limiting part and the guide member comprises a limiting slot, and the other comprises a positioning column which is accommodated in the limiting slot; the positioning column slides in the limiting slot in response to the first rotation of the limiting part, and the positioning column and the slot wall of the limiting slot abut each other to cause the second rotation of the limiting part.

9. The surgical instrument of claim 7, wherein, The guide member comprises a stop part which is configured to abut against the limiting part to block the second rotation of the limiting part when the limiting part is in the first limiting position; the limiting part moves away from the stop part in response to the first rotation of the limiting part.

10. The surgical instrument of claim 1, wherein, The locking assembly further comprises a transmission part connected to the operating member, 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 locked position to the unlocked position in response to the operating member being operated.

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