Surgical instruments

Abstract

The present disclosure relates to a surgical instrument, comprising a body, a closable handle, a firing handle, and a locking assembly, wherein the locking assembly comprises an operating member, a locking member, and a limiting portion, wherein the locking member has a locking position and an unlocking position; in a first limiting position, the limiting portion is configured to block the locking member from moving from the locking position to the unlocking position; in a second limiting position, in response to the operating member being operated, the locking member moves from the locking position to the unlocking position; the limiting portion is rotatably connected to the closing handle, the body comprises a guiding member, and the guiding member is actuably connected to the limiting portion; in response to the closing handle rotating to the first closing position, the limiting portion performs a first rotation around the rotation axis of the closing handle, and 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. The second rotation increases the rotation angle of the operating member being operated, thereby improving the user's operating feel.

Description

Technical Field

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

[0002] Surgical cutting staplers are commonly used in medicine as an alternative to manual suturing. Their main working principle is to use a cutting knife to separate tissues and titanium staples to staple them, similar to a stapler. There are many types of staplers according to their suitability for different parts of the body. For surgical cutting staplers, their working principle is to enter the patient's body through the cannula of the puncture device positioned at the surgical site, and then make a longitudinal incision in the tissue and apply staples on the opposite side of the incision, thereby separating and staple the tissues. Summary of the invention

[0003] The solution of the present disclosure is achieved by:

[0004] A surgical instrument comprises a body, a closing handle rotatably arranged on the body, a firing handle rotatably arranged on the body, and a locking assembly, wherein the locking assembly comprises an operating member, a locking member connected to the operating member and arranged on the body, and a limiting portion, the closing handle having a first release position and a first closed position, and the firing handle having a second release position and a second closed position;

[0005] The locking member has a locking position and an unlocking position; in the locking position, the locking member is configured to block the firing handle from moving from the second release position to the second closed position; when the locking member is in the unlocking position, in response to the firing handle being operated, the firing handle moves from the second release position to the second closed position;

[0006] The limiting portion has a first limiting position and a second limiting position; in the first limiting position, the limiting portion is configured to block the locking member from moving from the locking position to the unlocking position; in the second limiting position, in response to the operating member being operated, the locking member moves from the locking position to the unlocking position;

[0007] The limiting part is rotatably connected to the closing handle, and the body includes a guide member, and the guide member is movably connected to the limiting part;

[0008] 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 guide 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.

[0009] In one embodiment, one of the limiting portion and the guide member includes a limiting groove, and the other includes a positioning column, and the positioning column is accommodated in the limiting groove. When the limiting portion is in the first limiting position, in response to the first rotation of the limiting portion, the positioning column slides in the limiting groove, and the positioning column and the groove wall of the limiting groove abut against each other, so that the limiting portion performs the second rotation.

[0010] In one embodiment, the guide member includes a stop portion, and when the limit portion is in the first limit position, the stop portion is configured to abut against the limit portion to prevent the limit portion from performing the second rotation; in response to the first rotation of the limit portion, the limit portion leaves the stop portion.

[0011] In one embodiment, the limiting portion includes a limiting groove, the guiding member includes a positioning column, the positioning column is received in the limiting groove, the positioning column includes a stop surface, and when the limiting portion is in the first limiting position, the stop surface abuts against the groove wall of the limiting groove to prevent the limiting portion from performing the second rotation; in response to the first rotation of the limiting portion, the groove wall of the limiting groove separates from the stop surface.

[0012] In one embodiment, the limiting portion includes a positioning column, the guide member includes a limiting groove, the positioning column is accommodated in the limiting groove, the limiting groove includes a limiting stop surface, and when the limiting portion is in the first limiting position, the limiting stop surface abuts against the positioning column to prevent the limiting portion from performing the second rotation; in response to the first rotation of the limiting portion, the positioning column is separated from the limiting stop surface.

[0013] In one embodiment, during the movement of the firing handle from the second release position to the second closed position, the firing handle moves along a first path;

[0014] The locking member comprises a blocking portion and a moving portion connected to the blocking portion, the moving portion is rotatably connected to the body, the operating member is connected to the moving portion, when the locking member is in the locking position, at least a portion of the blocking portion is located in the first path, and the blocking portion is configured to block the firing handle located in the first path;

[0015] In response to the operating member driving the moving portion to rotate, the moving portion drives the blocking portion to rotate to leave the first path, thereby causing the locking member to move from the locking position to the unlocking position.

[0016] In one embodiment, the moving portion includes a central rotating portion and a semi-ring portion connected to the central rotating portion, the semi-ring portion is arranged around the central rotating portion, the blocking portion is arranged at one end of the semi-ring portion, and the blocking portion and the other end of the semi-ring portion form a notch; when the locking member is in the locking position, the blocking portion is at least partially located in the first path to block the firing handle located in the first path; when the locking member is in the unlocking position, the blocking portion leaves the first path and at least partially the notch is located in the first path to avoid the firing handle moving along the first path. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a surgical instrument according to an embodiment of the present disclosure;

[0018] Figure 2 is a structural schematic diagram of a locking assembly in a first locking state according to an embodiment of the present disclosure;

[0019] Figure 3 is a schematic diagram of the internal structure of a locking assembly in a first locking state according to an embodiment of the present disclosure;

[0020] Figure 4 is a schematic structural diagram of a firing handle in an embodiment of the present disclosure in a second release position and a second closed position;

[0021] Figure 5 yes Figure 3 The structural diagram at A in the middle;

[0022] Figure 6 is a structural schematic diagram of a locking assembly in a second locking state according to an embodiment of the present disclosure;

[0023] Figure 7 is a schematic diagram of the internal structure of a locking assembly in a second locking state according to an embodiment of the present disclosure;

[0024] Figure 8 is a structural schematic diagram of a locking assembly in an unlocked state according to an embodiment of the present disclosure;

[0025] Fig. 9 is a schematic diagram of the internal structure of a locking assembly in an unlocked state according to an embodiment of the present disclosure;

[0026] Fig.10a yes Fig. 9 Schematic diagram of the structure at B in the middle;

[0027] Fig.10b is a schematic structural diagram of a locking member in a locking position and an unlocking position according to an embodiment of the present disclosure;

[0028] Fig.11is an exploded view of an operating portion and a moving portion according to an embodiment of the present disclosure;

[0029] Fig.12 is an exploded view of the operating part and the moving part of an embodiment of the present disclosure from another angle;

[0030] Fig.13 yes Figure 3 The structural diagram at A in the middle;

[0031] Fig.14 is a schematic structural diagram of a moving part and a limiting part in another embodiment of the present disclosure;

[0032] Fig.15 It is a schematic diagram of a structure in which a moving part is movably connected to a body in an embodiment of the present disclosure;

[0033] Fig.16 is a schematic diagram of a structure in which an operating part is operated in one embodiment of the present disclosure;

[0034] Fig.17 is a structural schematic diagram of an embodiment of the present disclosure in which the limiting portion is in the second limiting position and the locking member is in the locking position;

[0035] Fig.18 is a structural schematic diagram of a locking member in an unlocked position in one embodiment of the present disclosure;

[0036] Fig.19 is a structural schematic diagram of a closing handle in a first release position in an embodiment of the present disclosure;

[0037] Fig.20a yes Fig.19 The structural diagram at C in the middle;

[0038] Fig.20b is a schematic structural diagram of a stopper in one embodiment of the present disclosure;

[0039] Fig.20c is a schematic structural diagram of a stopper in another embodiment of the present disclosure;

[0040] Fig.21 is a schematic structural diagram of a closing handle in a first closing position according to an embodiment of the present disclosure;

[0041] Fig. 22 yes Fig.21 Schematic diagram of the structure at D in the middle;

[0042] Fig.23 is a structural schematic diagram of a locking assembly in an unlocked state according to an embodiment of the present disclosure;

[0043] Fig.24 yes Fig.18 Schematic diagram of the structure at E in the middle;

[0044] Fig.25 is a structural schematic diagram of an operating unit in yet another embodiment of the present disclosure;

[0045] Fig.26 is a schematic structural diagram of a surgical instrument according to yet another embodiment of the present disclosure;

[0046] Fig. 27 is a structural schematic diagram of a closing handle in a first closing position according to yet another embodiment of the present disclosure;

[0047] Fig.28 yes Fig. 27 The structural diagram of the F position in the middle;

[0048] Fig.29 is a structural schematic diagram of a locking assembly in an unlocked state according to an embodiment of the present disclosure;

[0049] Fig.30 yes Fig.29 Schematic diagram of the structure at G in the middle.

[0050] in:

[0051] 100, body; 110, sleeve assembly; 111, outer sleeve; 120, jaw assembly; 130, handle; 140, guide portion; 141, positioning column; 142, stop surface; 143, abutment surface; 150, moving groove;

[0052] 200, closing handle; 210, handle portion; 230, plate body portion; 240, limiting portion; 241, limiting groove; 242, first end portion; 243, side groove wall; 244, second end portion;

[0053] 300, firing handle; 310, action part; 320, main body;

[0054] 400, locking assembly; 410, operating member; 411, transmission part; 412, square groove; 413, gasket; 414, connecting part; 415, first accommodating groove; 416, second accommodating groove; 417, connecting groove;

[0055] 401, locking member;

[0056] 420, moving part; 421, central rotating part; 422, semi-ring part; 424, notch; 425, square protrusion; 430, blocking part; 431, blocking surface; 440, abutting part; 450, receiving part;

[0057] 500, jaw opening assembly; 510, locking rod; 520, unlocking button;

[0058] 600, return knife;

[0059] 700. Connecting rod. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0061] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0062] It should be understood that the terms "proximal" and "distal" used herein are relative to the clinician manipulating the surgical instrument. The term "proximal" refers to the portion close to the clinician, and the term "distal" refers to the portion away from the clinician. That is, the handle is the proximal side, and the jaw assembly is the distal side. For example, the proximal end of a component refers to the end relatively close to the handle, and the distal end refers to the end relatively close to the jaw assembly. However, surgical instruments can be used in many directions and positions, so these terms expressing relative positional relationships are not limited and absolute.

[0063] In the present disclosure, unless otherwise clearly specified 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 movably connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements such as abutment. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. It should be noted that when there is a qualifier before "connection", it has the meaning defined by the corresponding qualifier, and only excludes situations that obviously need to be excluded, and does not exclude other possible situations.

[0064] The present disclosure relates to a surgical instrument, which may be a stapler, such as Figure 1As shown, the surgical instrument includes a body 100, a sleeve assembly 110 connected to the body 100, a jaw assembly 120 connected to the body 100, a cutting knife assembly (not shown in the figure), a closing handle 200 rotatably arranged on the body 100, and a firing handle 300 rotatably arranged on the body 100. The sleeve assembly 110 includes an inner sleeve (not shown in the figure) and an outer sleeve 111, the jaw assembly 120 is connected to the outer sleeve 111, the closing handle 200 is in transmission connection with the outer sleeve 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 release position and the jaw assembly 120 is in the open state. Figure 6 As 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 closed position, and the movement of the closing handle 200 drives the outer sleeve 111 to move distally, and the outer sleeve 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 closed position, it remains in the first closed position. The structure of the closing handle 200 remaining in the first closed position is described below.

[0065] The firing handle 300 is connected to the cutting knife assembly by transmission, and the specific implementation structure is described below. The firing handle 300 has a second release position and a second closed position. The cutting knife assembly includes a knife head (not shown in the figure), which is located in the jaw assembly 120. When the jaw assembly 120 is in a closed state, the tissue is clamped. The user presses the firing handle 300 to move the firing handle 300 from the second release position to the second closed position. The above movement of the firing handle 300 drives the cutting knife assembly to fire, wherein firing refers to the cutting knife assembly moving distally, so that the knife head located in the jaw assembly 120 moves distally to cut the tissue clamped in the jaw assembly 120. The surgical instrument also includes a knife return assembly and a jaw opening assembly. After the knife head moves distally to the limit position, the user operates the knife return assembly to move the cutting knife assembly proximally to the 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 knife assembly returns to its initial position before firing, as well as the structure of the jaw opening assembly 500 are described below.

[0066] In actual surgical operations, after the doctor operates the jaw assembly 120 to close and clamp human tissue, before controlling the cutting knife assembly to cut the clamped tissue, it may be necessary to make adjustments, such as changing the clamping position. That is, when the jaw assembly 120 is in a closed state, the appropriate firing time may not have been reached. At this time, if the doctor accidentally triggers the firing handle 300 during the operation, the cutting knife assembly may be fired, cutting the tissue that is not expected to be cut, causing a surgical error.

[0067] 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, and the two cooperate with each other through the tooth structure. When firing is required, the locking structure is operated to rotate to disengage from the position 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 it is rotated, 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.

[0068] like Figure 2 and Figure 3 As shown, the surgical instrument in the present 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 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 4 As shown, in the above process, the firing handle 300 rotates around its own rotation axis, wherein the movement trajectory of the firing handle 300 from the second release position to the second closed position is a first path (wherein the solid line is the second release position, and the dotted line is the second closed position).

[0069] 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 in the first path. The locking member 401 in the locked position is configured to abut the firing handle 300 located in the first path, thereby blocking the firing handle 300 from moving from the second release position to the second closed position. Wherein, abutting the firing handle 300 located in the first path means that the locking member 401 in the locked position abuts the firing handle 300 located in the second release position to block the movement of the firing handle 300, or the locking member 401 in the locked position is separated from the firing handle 300 located in the second release position. In response to the 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, wherein leaving means that the locking member 401 is not located in 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 on the firing handle 300, the firing handle 300 moves from the second released position to the second closed position.

[0070] The path of the locking member 401 moving from the locked position to the unlocked position is the unlocking path, wherein Fig.10b The locking member 401 shown by the solid line in the figure is in the locked position, and the locking member 401 shown by the dotted line 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 portion 240 is located at the first limiting position, and at least a part of the limiting portion 240 located at the first limiting position is located in the unlocking path to block the locking member 401 from moving from the locked position to the unlocking position.

[0071] 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 in the second limiting position, and the limiting portion 240 in the second limiting position leaves the unlocking path, where leaving means that the limiting portion 240 is not in 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 switches from the locked state to the unlocked state.

[0072] When the locking assembly 400 is in a locked state, the locking member 401 in the locked position blocks the firing handle 300 located on the first path, so that the firing handle 300 cannot be operated and closed, and the cutting knife assembly cannot cut the tissue to avoid undesired cutting of the tissue. When the locking assembly 400 is in an unlocked state, the locking member 401 in the unlocked position leaves the first path, so that the firing handle 300 can move along the first path, so that the firing handle 300 can be operated and closed, and the cutting knife assembly can cut the tissue.

[0073] In the locked state, the locking member 401 blocks the movement of the firing handle 300 by abutting against the firing handle 300 located in the first path. 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 abuts against the firing handle 300 located in the first path. The locking member 401 abuts against the firing handle 300 located in the first path to limit the firing handle 300, so that the locking member 401 can smoothly move from the locked position to the unlocked position relative to the firing handle 300, thereby avoiding the situation where the locking member 401 cannot move to the unlocked position and the locking member 401 fails to unlock.

[0074] 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, limiting 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, so as to avoid the locking member 400 being in the unlocked state in advance and the firing handle 300 being unable to be 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, 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 member 400 to the unlocked state, thereby releasing the limit on the firing handle 300.

[0075] For example, the locking state includes a first locking state and a second locking state. When the locking member 401 is in the locking position and the closing handle 200 is in the first release position, the locking assembly 400 is in the first locking state. When the locking member 401 is in the locking position and the closing handle 200 is in the first closed position, the locking assembly 400 is in the second locking state. During the use of the surgical instrument, the locking assembly 400 switches from the first locking state to the second locking state, and then switches from the second locking state to the unlocking state.

[0076] The locking member 401 includes a blocking portion 430 and a moving portion 420 connected to the blocking portion 430, wherein 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 portion of the blocking portion 430 is located in the first path, abutting against the firing handle 300 located in the first path to limit the movement of the firing handle 300. When the locking member 401 is in the unlocked position, the blocking portion 430 leaves the first path and does not abut against the firing handle 300 located in the first path, so that the firing handle 300 can smoothly move from the second release position to the second closed position.

[0077] 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 operating portion 410 being operated, 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.

[0078] In one embodiment, if Figures 7 to 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 .

[0079] When the locking assembly 400 is in the second locking state, that is, the locking member 401 is in the locking position and the closing handle is in the first closing position, in response to the operating member 410 being operated, the operating 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 locking position to the unlocking position.

[0080] The locking member 401 moves from the locked position to the unlocked position by rotating, and the unlocking path of the locking member 401 is the movement path of the locking member 401 when it rotates around the rotation axis of the moving part 420. 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. The semi-ring part 422 is fixedly connected to the central rotating part 421, and can also be integrally formed. The semi-ring part 422 is an incomplete ring, and its ring shape can be a major arc, a minor arc, or a semicircle. 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 form a gap 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, so that the locking member 401 can 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 the notch 424 is at least partially located in the first path, so that the locking member 401 can avoid the firing handle 300 located in the first path through the notch 422. Therefore, the locking assembly 400 will not block the firing handle 300 moving along the first path when in the unlocked state. In one embodiment, Fig.13 As shown, the blocking portion 430 includes a blocking surface 431, which is, for example, an arc shape. The blocking surface 431 is configured to be at least partially located in the first path when the locking member 401 is in the locked position. The blocking portion 430 abuts the firing handle 300 moving in 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. For another example, when the firing handle 300 is in the second release position, the blocking surface 431 is separated from the firing handle 300. 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 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 release position to the second closed position. The blocking surface 431 may also be in other shapes.

[0081] The provision of the blocking portion 430 further improves 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, the firing handle 300 is intended to move from the second release 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, so that the firing handle 300 applies a force to the blocking portion 430, but the movement trajectory of the blocking portion 430 is an arc, and the force applied by the firing handle 300 to the blocking portion 430 will not cause it to produce an arc movement, so that the blocking portion 430 is not easy to leave the locked position. That is, the provision of the blocking portion 430 enables the locking member 401 to be better maintained in the locked position when the locking assembly 400 is in the locked state and the firing handle 300 is accidentally touched.

[0082] The arc-shaped setting of the blocking surface 431 enables the locking member 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 on the first path at a certain distance from the firing handle 300. The blocking surface 431 is extended along the first arc, that is, the first arc contacts or is 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 portion 420. When the locking member 401 moves from the locked position to the unlocked position, the locking member 401 moves along the unlocking path, the blocking surface 431 rotates around the rotation axis of the moving portion 420, and the blocking surface 431 rotates along the first arc. 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, and further enables the locking member 401 to smoothly move from the locked position to the unlocked position.

[0083] 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 axis 220. The rotation axis 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 axis 220 are matched with the machine body 100. The rotation axis 220 is penetrated through the handle part 210 so that the handle part 210 can rotate around the rotation axis 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 axis 220. For example, the moving part 420 is sleeved on the rotation axis 220. When the operating member 410 rotates, the moving part 420 is driven to rotate relative to the rotation axis 220. The rotation axis 220 is used to limit the rotation axis of the moving part 420 so that the position of the moving part 420 is stable.

[0084] During the switching of the closing handle 200 between the first release position and the first closed position, the handle portion 210 rotates around the first rotation axis K1, and the rotation axis 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 closed position, the locking member 401 can be stably maintained in the locked position.

[0085] In one embodiment, if Figure 7 As shown, the closing handle 200 also includes a plate body 230 connected to the handle portion 210. The handle portion 210 is used for user operation. The plate body 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 is described below. For example, the above-mentioned limit portion 240 is fixedly arranged on the plate body 230. For example, Figure 7 and Fig.12 As shown, in the thickness direction of the plate body 230, the plate body 230 and the firing handle 300 are staggered, that is, the firing handle 300 and the closing handle 200 are at least partially stacked, which can make the internal structure of the body 100 more compact. The blocking portion 430 is protruded along the thickness direction of the plate body 230, and the blocking portion 430 is opposite to the firing handle 300, so that the blocking portion 430 can block the firing handle 300 located in the first path.

[0086] In another embodiment, if Figures 14 to 17 As shown, the moving part 420 is movably arranged on the machine body, the operating member 410 is connected to the moving part 420, and the operating member is movably arranged 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, in response to the operating member 410 being operated and moving, the moving part 420 moves relative to the machine body 100, driving the blocking part 430 to move 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. Fig.18 The middle locking member is in the unlocked position.

[0087] For example, Fig.16As shown, the body 100 is provided with a moving groove 150, and the moving groove 150 is a through groove. The operating member 410 cooperates with the moving groove 150 and can slide along the length direction of the moving groove 150. The operating member 410 penetrates the moving groove 150 and enters the body 100, and is fixedly connected with the moving part 420, so that the operating member 410 can drive the moving part 420 to move. When the operating member 410 is in the 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. In the above process, the locking member 401 moves in the direction away from the firing handle 300 to leave the first path.

[0088] For example, the locking member 401 moves with the operating member 410, Fig.17 Move to the position Fig.18 The dotted 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 released position, the limiting portion 240 is in the first limited position, blocking the locking member 401 from moving to the unlocked position. The locking member 401 is in the locked position. For example, the blocking portion 430 is provided on a side of the moving portion 420 close to the firing handle 200. For example, the blocking portion 430 includes a side wall of the moving portion 420 close to the firing handle 200, so that the blocking portion 430 is located in the first path. When the closing handle 300 moves from the first released position to the first closed position, the limiting portion 240 rotates with the closing handle 300 and moves from the first limited position to the second limited position. Fig.15 and Fig.17 As shown, the limiting portion 240 located at the second limiting position leaves the unlocking path and no longer blocks the movement of the locking member 401, so that the locking member 401 can smoothly move from the locking position to the unlocking position. Figure 4 , Figure 5 and Fig.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 portion of the body portion 320, and when the locking member 401 is in the locked position, the action portion 310 corresponds to the locking member 401, and the correspondence here means that the action portion 310 and the locking member 401 abut or are spaced a certain distance apart, and the locking member 401 is configured to abut the action portion 310 located in the first path to block the firing handle 300 from moving along the first path. For example, the action portion 310 corresponds to the blocking surface 431.

[0089] In the embodiment of the present disclosure, the user can switch the locking assembly 400 from the locked state to the unlocked state by single-handed operation. Figure 6As shown, the body 100 also includes a handle 130. When the user operates the surgical instrument, the user holds the handle 130 and presses the closing handle 200 and the firing handle 300 with the fingers. The operating member 410 is protrudingly disposed on the body 100 and is located above the handle 130. The above here does not only refer to the upper left or upper right of the handle 130. The operating member 410 can also be disposed 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 a first locking state. The user holds the handle 130 and presses the closing handle 200 with the fingers to move the closing handle 200 from the first release position to the first closed position, so that the locking assembly 400 switches from the first locking state to the second locking state. Then, the user can operate the operating member 410 with the thumb of the hand holding the handle to move the operating member 410 along the first locking state. Figure 6 Rotate in the direction of the arrow, or move the operating member 410 along Fig.16 The locking member 401 moves in the direction of the middle arrow from the locked position to the unlocked position, and the locking assembly 400 switches from the second locked state to the unlocked state.

[0090] In the embodiment of the machine body 100, the moving part 420 is rotatably disposed, and the operating member 410 is connected to the moving part 420 and can move synchronously with the moving part 420. For example, Fig.11 and Fig.12 As shown, the operating member 410 is provided with a connecting portion 414, the connecting portion 414 is provided with a square groove 412, and the moving portion 420 is provided with a square protrusion 425, and the square protrusion 425 is embedded in the square groove 412, so that the operating member 410 is connected to the moving portion 420, and the operating member 410 can drive the moving portion 420 to rotate. For another example, the operating member 410 also includes a gasket 413, which is arranged between the connecting portion 414 and the moving portion 420 to improve the stability of the connection between the operating member 410 and the moving portion 420.

[0091] For example, one of the body 100 and the operating member 410 includes a protrusion (not shown in the figure), and the other includes a limiting groove, such as Fig.11 As shown, the limiting groove includes a first accommodating groove 415 and a second accommodating groove 416. When the locking member 401 is in the locked position, the protrusion is received and retained in the first accommodating groove 415. When the locking member 401 is in the unlocked position, the protrusion is received and retained in the second accommodating groove 416; thereby, the locking member 410 can be maintained in the unlocked position or in the locked position.

[0092] When the locking assembly 400 switches from the locked state to the unlocked state, the protrusion escapes 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 have a limiting effect on the protrusion to prevent the operating member 410 from moving when not being operated. When the user operates the operating member 410, the operating force can overcome the limiting of the first receiving groove 415, so that the locking member 401 can be smoothly operated and moved. 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 escapes 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, so that the movement of the operating member 410 is more stable.

[0093] For example, the operating member 410 fits with the body, and when the locking member 401 is in the locked position, the friction between the operating member 410 and the body 100 keeps the locking member 401 more stably in the locked position, and when the locking member 401 is in the unlocked position, the friction between the operating member 410 and the body 100 keeps the locking member 401 more stably in the unlocked position. When the user operates the operating member 410, the operating force can overcome the friction between the operating member 410 and the body 100, so that the locking member 401 can be smoothly operated and moved. For example, a damping plate is provided on the side of the operating member 410 close to the body 100 to increase the friction between the operating member 410 and the body 100, so that the locking member 401 can be better maintained in the unlocked position or in the locked position.

[0094] For another example, the operating member 410 includes a magnetic component, and the body 100 includes a first magnetic matching portion and a second magnetic matching portion (not shown in the figure). When the locking member 401 is in the locked position, the magnetic component and the first magnetic matching portion generate a magnetic attraction force, so that the locking member 401 is more stably kept in the locked position. When the locking member 401 is in the unlocked position, the magnetic component and the second magnetic matching portion generate a magnetic attraction force, so that the locking member 401 is more stably kept in the unlocked position. When the user operates the operating member 410, the operating force can overcome the above-mentioned magnetic attraction force, so that the locking member 401 can be smoothly operated and moved. For example, the magnetic component includes a magnet, and the first magnetic matching portion and the second magnetic matching portion include magnetic metal. For another example, the operating member 410 includes magnetic metal, and the first magnetic matching portion and the second magnetic matching portion include magnets.

[0095] The movement of the closing handle 200 from the first release position to the first closed position to close the jaw assembly 120 is achieved by the following structure:

[0096] like Figure 1 and Figure 7As shown, the jaw assembly 120 includes a nail magazine seat and an anvil seat, the anvil seat is rotatably connected to the nail magazine seat, and the anvil seat is connected to the distal end of the outer sleeve 111, and 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 seat and the nail magazine seat form a certain angle with each other, so that the jaw assembly 120 is 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, and the outer sleeve 111 moving toward the distal side drives the anvil seat to rotate relative to the nail magazine seat until the anvil seat and the nail magazine seat are substantially parallel, thereby switching the jaw assembly 120 from the open state to the closed state.

[0097] For example, the surgical instrument includes a connecting rod 700, the proximal end of the connecting rod 700 is rotatably connected to the plate body 230 of the closing handle 200, and the distal end of the connecting rod 700 is rotatably connected to the proximal end of the outer sleeve 111. In response to the closing handle 200 moving from a first release position to a first closed position, the plate body 230 rotates to drive the connecting rod 700 to move distally, and the connecting rod 700 drives the outer sleeve 111 to move distally.

[0098] The closing handle 200 is kept in the first closed position after moving to the first closed position by the following structure:

[0099] like Figure 3 and Figure 7 As shown, the surgical instrument further includes a jaw opening assembly 500, which includes a locking rod 510 and an unlocking button 520 connected to the locking rod 510, for example, Figure 3 As shown, when the closing handle 200 is in the first release position, the plate body 230 is separated from the locking rod 510, so that the closing handle 200 can move from the first release position to the first closed position; Figure 7 As shown, when the closing handle 200 moves to the first closed position, the jaw assembly 120 is closed, and the locking rod 510 abuts against the plate body 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 the jaw assembly 120 needs to be opened, the unlocking button 520 is pushed, and the unlocking button 520 drives the locking rod 510 to rotate upward, so that the locking rod 510 is separated from the plate body 230, and the locking rod 510 no longer abuts against the plate body 230. The closing handle 200 also includes an elastic reset member (not shown in the figure) arranged on the first rotation axis K1. After the locking rod 510 is separated from the plate body 230, the elastic reset member drives the closing handle 200 to move from the first closed position to the first release position, and the jaw assembly 120 is opened.

[0100] For another example, the locking lever 510 has a first hook, and the plate body 230 is provided with a second hook ( Figure 7 (not shown), when the closing handle 200 is in the first release position, the second hook is separated from the first hook, so that the closing handle 200 can move from the first release position to the first closed position; Figure 7 As shown, when the closing handle 200 moves to the first closed position, the jaw assembly 120 is closed, and the first hook cooperates with the second hook to block 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 the jaw assembly 120 needs to be opened, the unlocking button 520 is pushed, and the unlocking button drives the first component to leave the second hook to release the lock of the closing handle 200. The closing handle 200 also includes an elastic reset member (not shown in the figure) arranged on the first rotation axis K1. After the locking rod 510 is separated from the plate body 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.

[0101] The above-mentioned specific implementation manner and the specific implementation manner described above are all applicable to the locking component in the present disclosure to realize its function.

[0102] The overall operation process of surgical instruments is as follows:

[0103] When surgical instruments are not in use, Figures 1 to 3 As shown, the jaw assembly 120 is in an open state, the closing handle 200 is in a first release position, the firing handle 300 is in a second release position, the locking member 401 is in a locked position, and the locking assembly 400 is in a 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 he operate the operating member 410.

[0104] The user aligns the jaw assembly 120 with the human tissue to be clamped, such as Figure 6 and Figure 7 As shown, the closing handle 200 is pressed to move the closing handle 200 from the first release position to the first closed position, the jaw assembly 120 is closed, and the closing handle 200 keeps the jaw assembly 120 in the closed state, and the closing handle 200 is kept in the first closed position. The limiting portion 240 moves with the closing handle 200 to leave the unlocking path, and at this time, the locking assembly 400 is in the second locking state and can be operated to switch from the locked state to the unlocked state.

[0105] like Figures 8 to 10aAs shown, the user operates the operating member 410, for example, by toggling the operating member 410 to rotate, the operating member 410 drives the moving portion 420 and the blocking portion 430 to rotate, so that the locking member 401 moves from the locked position to the unlocked position; or for another example, by pushing the operating member 410 to move, the operating member 410 drives the moving portion 420 and the blocking portion 430 to move, so that the locking member 401 moves 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 leaves the first path no longer blocks the movement of the action portion 310 of the firing handle 300, so that the firing handle 300 can be pressed.

[0106] like Figure 4 and Fig.10a As shown, the firing handle 300 is pressed to move the firing handle 300 from the second release position to the second closed position. During the movement of the firing handle 300 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, the firing handle 300 includes a ratchet, in response to the firing handle 300 moving from the second release position to the second closed position, the ratchet engages with the rack, and drives the rack to drive the cutting knife assembly to move distally, and the firing handle 300 is pressed multiple times, and the cutting knife assembly moves distally to the bottom, completing the cutting of the clamped tissue. For another example, the surgical instrument includes a motor, the motor is connected to the cutting knife assembly, and is used to drive the cutting knife assembly to move proximally or distally, the firing handle 300 is electrically connected to the motor, and in response to the firing handle 300 being in the second closed position, the motor drives the cutting knife assembly to move distally to cut the clamped tissue.

[0107] After the cutting blade assembly cuts to the bottom, in response to the user's operation, the cutting blade assembly moves proximally to return to the position when no cutting is performed. Figure 6 As shown, the surgical instrument includes a knife return assembly 600, which is connected to the cutting knife assembly. The knife return assembly 600 is protrudingly arranged outside the body 100, and the knife return assembly 600 is connected to the cutting knife assembly. The user can pull the knife return assembly 600 proximally to make the cutting knife assembly move proximally to complete the knife return. For another 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 to switch the firing handle 300 to the second release position, and the motor drives the cutting knife assembly to move proximally to complete the knife return.

[0108] After the return is completed, Fig. 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 move the surgical instrument out of 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 rod 510 to rotate, so that the locking rod 510 is disengaged from the plate body 230. The closing handle 200 moves from the first closed position to the first release position under the action of the elastic reset member (not shown in the figure). During the movement of the closing handle 200 from the first closed position to the first release position, the limiting portion 240 is driven to move. During the movement of the limiting portion 240 from the second limiting position to the first limiting position, the locking member 401 is pushed to drive the locking member 401 to move 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 Figures 3 to 9 ,as well as Figures 14 to 18As shown, when the limiting portion 240 is located at the first limiting position, it is at the head end of the unlocking path, and when the limiting portion 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 portion 240 from the first limiting position to the second limiting position is substantially the same as the unlocking path. When the locking member 401 is located at the unlocking position, in response to the limiting portion 240 moving from the second limiting position to the first limiting position, the limiting portion 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, so that the locking member 401 moves from the unlocking position to the locking position. Among them, the locking member 401 moves forward along the unlocking path when moving from the locking position to the unlocking position, and moves in the reverse direction along the unlocking path when moving from the unlocking position to the locking position. In the above process, the firing handle 300 is not driven and is still in the second release state, so that the action portion 310 is not located on the first path, and will not hinder the movement of the locking member 401, so that the locking assembly 400 can smoothly switch from the unlocked state to the locked state. After the jaw assembly 120 is opened, the firing handle 300 is still in the second release state, while the closing handle 200 is in the first release state, and the locking member 401 is in the locked 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 used, so that the surgical instrument can be used again. When the locking assembly 400 is in the first locked state, the limiting portion 240 blocks the abutting portion 440 of the locking member 401, so that the locking member 401 cannot rotate from the locked position to the unlocked position. When the closing handle 200 moves from the first release position to the first closed position, it rotates a first angle relative to the first rotation axis K1, drives the limiting portion 240 to rotate a first angle around the first rotation axis K1, and the limiting portion 240 rotates a first angle around the first rotation axis K1 to leave the abutting portion 440. The rotation of the limiting portion 240 driven by the closing handle 200 provides a space for the abutting portion 440 to move along the unlocking path. In the embodiment where the limiting portion 240 is fixedly arranged on the closing handle 200, when the closing handle 200 moves from the first release position to the first closed position, the limiting portion 240 rotates a first angle around the first rotation axis K1. For example, the locking member 404 rotates toward the limiting portion 240 to achieve unlocking, and the angle of rotation is, for example, less than or equal to the first angle, and the above angle is, for example, 15°-30°.

[0109] In one embodiment, if Figures 19 to 24 As shown, the limiting portion 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 movably connected to the limiting portion 240 .

[0110] 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 around the rotation axis of the closing handle 200, and the first rotation is the rotation of the limiting portion 240 around the first rotation axis K1. In response to the first rotation of the limiting portion 240, the guide member 140 actuates the limiting portion 240, so that the limiting portion 240 performs a second rotation around 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 guide member 140, and the guide 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, and the limiting portion 240 is separated from the locking member 401 during the first rotation and the second rotation. Leaving the locking member 401 means that both the first rotation and the second rotation are rotations in the direction of leaving the locking member 401. The second rotation enables the locking member 401 to obtain a larger movement space when moving along the unlocking path, thereby 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 being operated, thereby improving the user's operating feel.

[0111] 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 the first angle, and the guide part 140 acts on the limiting part 240 to rotate the limiting part 240 around the second rotation axis K2 by a second angle, that is, the second rotation of the limiting part 240 rotates by the second angle. Since the first rotation and the second rotation both leave 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 user can operate the operating member 410 to rotate by an angle of 30-60°. This improves the angle at which the user operates the operating member 410, thereby improving the user's operating feel.

[0112] like Figures 19 to 22 As shown, one of the limiting portion 240 or the guiding portion 140 includes a limiting groove 241, and the other includes a positioning column 141. In response to the first rotation of the limiting portion 240, the positioning column 141 slides in the limiting groove 241, and the positioning column 141 and the groove wall of the limiting groove 241 abut against each other, so that the limiting portion 240 performs a second rotation.

[0113] For example, the limiting portion 240 includes a limiting groove 241, the guiding portion 140 includes a positioning column 141, the positioning column 141 is fixedly disposed on the body 100, and the positioning column 141 is received in the limiting groove 241 and can move in the limiting groove 241. When the closing handle 200 moves 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 the first rotation, the outer edge of the positioning column 141 abuts against the inner groove wall of the limiting groove 241. The limiting groove 241 is a special-shaped groove. The extension direction of the limiting groove 241 is different from the trajectory of the limiting part 240 rotating around the first rotation axis K1, so that a force is generated between the positioning column 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 column 141 acts on the limiting groove 241 of the limiting part 240, so that the limiting part 240 performs the second rotation. Similarly, when the limiting part 240 includes the positioning column 141 and the guide member 140 includes the limiting groove 214, in response to the first rotation of the limiting part 240, the positioning column 141 slides in the limiting groove 241, and the limiting groove 241 acts on the positioning column 141 of the limiting part 240, so that the limiting part 240 performs the second rotation.

[0114] In one embodiment, if Fig.20a and Fig.20b As shown, the guide 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 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 leaves the stop portion 150.

[0115] When the locking assembly 400 is in the first locking state, the limiting portion 240 is in the first limiting position, and the locking member 401 is in the locking position. At this time, if the user accidentally triggers the operating member 410, intending to drive the locking member 401 to move from the locked position to the unlocked position, the limiting portion 240 resists the locking member 401 to block the movement of the locking member 401. Since the limiting portion 240 is rotatably arranged on the plate body 230, when the user operates the operating member 410 with a large force, the locking member 401 may drive the limiting portion 240 to rotate (perform a second rotation) when moving along the unlocking path. If the limiting portion 240 rotates under the drive of the locking member 401, the rotated limiting portion 240 provides movement space for the locking member 401 to move to the unlocked position, resulting in the failure of the limiting portion 240 to block the locking member 401.

[0116] The stopper 150 abuts against the limiting portion 240 to block the limiting portion 240 from performing the second rotation, so that the limiting portion 240 can be more stably maintained at the first limiting position, and the locking member 401 can be better limited. In the process of the closing handle 200 moving from the first release position to the first closed position, the limiting portion 240 performs the first rotation, and the limiting portion 240 leaves the stopper 150 when rotating around the first rotation axis K1, and the guide portion 140 acts on the limiting portion 240 to make the limiting portion 240 perform the second rotation, so that the limiting portion 240 smoothly moves to the second limiting position.

[0117] For example, Fig.20a and Fig.20b As shown, the limiting portion 240 includes a limiting groove 241, and the guiding portion 140 includes a positioning column 141. For example, the second rotation is a clockwise rotation. Fig.20b As shown, the limiting groove 241 includes two side groove walls 243, a first end 242 connected to the two side groove walls 243, and a second end 244 connected to the two side groove walls 243. The positioning column 141 includes a stop surface 142 corresponding to the first end 242 and an abutting surface 143 corresponding to the side groove wall 243. 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 242 to prevent the limiting portion 240 from performing the second rotation (clockwise rotation) and thereby keep the limiting portion 240 in the first limiting position. In response to the first rotation of the limiting portion 240, the positioning column 141 leaves the first end portion 242 and moves toward the second end portion 244, so that the stop surface 142 is separated from the first end portion 242, and the stop surface 142 no longer abuts against the limiting portion 240. The positioning column 141 acts on the side groove wall 243 through the abutting surface 143, so that the limiting portion 240 performs a second rotation. When the limiting portion 240 is in the second limiting position, the positioning column 141 abuts against the second end portion 244.

[0118] For example, Fig.20cAs shown, the limiting portion 240 includes a positioning column 141, the guide portion includes a limiting groove 241, the second rotation is a clockwise rotation, and 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 compound movement of the limiting portion 240. The limiting groove 241 includes a limiting stop surface 245, and the stop portion 150 includes a limiting stop surface 240. For example, when the limiting portion 240 is in the first limiting position, the positioning column 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 portion 240 is in the first limiting position, the limiting stop surface 241 abuts against the positioning column 141 to prevent the limiting portion 240 from performing the second rotation (clockwise rotation) so as to keep the limiting portion 240 in the first limiting position. In response to the first rotation (clockwise rotation) of the limiting portion 240, the positioning column 141 separates from the limiting stop surface 245 and moves toward the first end 243, the stop surface 142 no longer abuts against the limiting portion 240, and the side groove wall 243 of the limiting groove 241 acts on the positioning column 141, causing the limiting portion 240 to perform a second rotation. When the limiting portion 240 is in the second limiting position, the positioning column 141 abuts against the first end 243.

[0119] After the closing handle 200 moves from the first release position to the first closed position, the limiting portion 240 is in the second limiting position. In response to the user's operation of the operating member 410, the moving portion 420 rotates with the operating member 410 until the abutting portion 440 abuts against the limiting portion 240, so that the locking assembly 400 is in an unlocked state. The user operates the firing handle 300 to drive the cutting knife assembly to fire, and the knife is retracted after firing to the end. After the knife is retracted, the user operates the jaw opening assembly 500 to open the jaw assembly 120 and move the closing handle from the first closed position to the first release position. During the movement of the closing handle 200 from the first closed position to the first release position, the closing handle 200 rotates around the first rotation axis K1, driving the limiting portion 240 to perform a third rotation, and the third rotation is the reverse movement of the first rotation. At the same time, the positioning column 141 moves in the limiting groove 241 and acts on the limiting groove 241, so that the limiting part 240 rotates around its own rotation axis (the second rotation axis K2) and performs the fourth rotation. 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.

[0120] During the movement of the limiting portion 240 from the second limiting position to the first limiting position, the limiting portion 240 always abuts against the abutment portion 440 of the locking member 401. The above movement of the limiting portion 240 drives the locking member 401 to move from the unlocking position to the locking position, thereby switching the locking assembly from the unlocking state to the first locking state.

[0121] In another embodiment, Figures 25 to 30As shown, the locking assembly 400 includes a transmission part 411 connected to the operating member 410, and the transmission part 411 is in transmission connection with the locking member 401. 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.

[0122] The operating member 410 is connected to the moving part 420 through the transmission part 411, so that the operating member 410 does not need to be directly connected to the moving part 420, and the setting position of the operating member 410 is no longer restricted by the position of the locking member 401. The operating member 410 can be set at any position of the body 100. The position setting of the operating member 410 can be more ergonomic, allowing the user to operate the operating member 410 more conveniently and comfortably.

[0123] For example, the operating member 410 is rotatably disposed on the housing of the machine body 100, the locking member 401 is rotatably disposed on the machine body, and the rotation axis of the locking member 401 is offset from the rotation axis of the operating member 410. The offset means that the rotation axis of the locking member 401 is not concentric with the rotation axis of the operating member 410.

[0124] 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 to move from the locked position to the unlocked position.

[0125] For example, the locking member 401 includes the above-mentioned moving part 420, the blocking part 430 and the receiving part 450 connected to the moving part 420, the moving part 420 is rotatably arranged on the body, the transmission part 411 is rotatably arranged on the body, and the receiving part 450 is abutted against the transmission part 411 to make the transmission part 411 and the locking member 401 transmission connected.

[0126] 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 411 is located at the lower side of the receiving portion 450 and abuts against the lower part of the receiving portion 450. For example, the abutting portion 440 includes an upper surface of the receiving portion 450. When the locking assembly 400 is in the first locking state, the limiting portion 240 abuts against the abutting portion 440 to limit the movement of the locking member 401 from the locked position to the unlocked position. When the locking assembly 400 is in the second locking state, the limiting portion 240 is separated from the abutting portion 440. In response to the operation of the operating member 410, the transmission portion 411 rotates clockwise, and applies an upward force to the receiving portion 450 to make the moving portion 420 rotate counterclockwise. The moving portion 420 that rotates counterclockwise drives the blocking portion 430 to leave the first path, so that the locking member 401 moves from the locked position to the unlocked position, and then the locking assembly 400 is switched from the second locking state to the unlocked state.

[0127] 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 released position, and the limiting portion 240 moves from the second limiting position to the first limiting position, generally moving in the opposite direction along the unlocking path, and the limiting portion 240 abuts against the abutting portion 440, driving the locking member 401 to move in the opposite direction along the unlocking path to move from the unlocked position to the locked position. In the process of the locking member 401 moving from the unlocked position to the locked position, the receiving portion 450 rotates with the locking member 401, for example, the receiving portion 450 rotates counterclockwise, and the lower side of the receiving portion 450 abuts against the transmission portion 411, and the receiving portion 450 rotating counterclockwise drives the transmission portion 411 to rotate, thereby driving the operating member 410 to rotate to the position before being operated, that is, the operating member 410 is reset, and the locking assembly 400 switches from the unlocked state to the first locked state.

[0128] exist Figures 25 to 30 In the embodiment of the present invention, the limiting portion 240 can also be rotatably disposed on the plate body 230, and the body 100 is provided with a guiding portion 140. When the closing handle 200 is rotated from the first release position to the first closed position, the limiting portion 240 performs a first rotation and a second rotation to move from the first limiting position to the second limiting position. The structures of the limiting portion 240 and the guiding portion 140 are similar to those of the embodiment of the present invention. Figures 19 to 24 The position and angle of the operating member 410 can be adjusted to facilitate comfortable operation by the user.

[0129] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0130] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present disclosure. They are not intended to limit the protection scope of the present disclosure. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A surgical instrument, characterized in that: The invention comprises a body, a closing handle rotatably arranged on the body, a firing handle rotatably arranged on the body, and a locking assembly, wherein the locking assembly comprises an operating member, a locking member connected to the operating member and arranged on the body, and a limiting portion, 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; The locking member has a locked position and an unlocked position; In the locked position, the locking member is configured to block movement of the firing handle from the second released position to the second closed position; When the locking member is in the unlocked position, in response to the firing handle being operated, the firing handle moves from the second released position to the second closed position; The limiting portion has a first limiting position and a second limiting position; in the first limiting position, the limiting portion is configured to block the locking member from moving from the locking position to the unlocking position; In the second limiting position, in response to the operation of the operating member, the locking member moves from the locking position to the unlocking position; The limiting part is rotatably connected to the closing handle, and the body includes a guide member, and the guide member is movably connected to the limiting part; 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 guide 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, characterized in that One of the limiting portion and the guiding member includes a limiting groove, and the other includes a positioning column, and the positioning column is received in the limiting groove. When the limiting portion is in the first limiting position, in response to a first rotation of the limiting portion, the positioning column slides in the limiting groove, and the positioning column and the groove wall of the limiting groove abut against each other, so that the limiting portion performs the second rotation.

3. The surgical instrument according to claim 1, characterized in that The guide member includes a stop portion, and 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 leaves the stop portion.

4. The surgical instrument according to claim 3, characterized in that The limiting portion includes a limiting groove, the guiding member includes a positioning column, the positioning column is received in the limiting groove, the positioning column includes a stop surface, when the limiting portion is in the first limiting position, the stop surface abuts against the groove wall of the limiting groove to prevent the limiting portion from performing the second rotation; in response to the first rotation of the limiting portion, the groove wall of the limiting groove is separated from the stop surface.

5. The surgical instrument according to claim 3, characterized in that: The limiting portion includes a positioning column, the guiding member includes a limiting groove, the positioning column is accommodated in the limiting groove, the limiting groove includes a limiting stop surface, when the limiting portion is in the first limiting position, the limiting stop surface abuts against the positioning column to prevent the limiting portion from performing the second rotation; in response to the first rotation of the limiting portion, the positioning column is separated from the limiting stop surface.

6. The surgical instrument according to claim 1, characterized in that During the movement of the firing handle from the second release position to the second closed position, the firing handle moves along a first path; The locking member comprises a blocking portion and a moving portion connected to the blocking portion, the moving portion is rotatably connected to the body, the operating member is connected to the moving portion, when the locking member is in the locking position, at least a portion of the blocking portion is located in the first path, and the blocking portion is configured to block the firing handle located in the first path; In response to the operating member driving the moving portion to rotate, the moving portion drives the blocking portion to rotate to leave the first path, thereby causing the locking member to move from the locking position to the unlocking position.

7. The surgical instrument according to claim 6, characterized in that The moving part includes a central rotating part and a semi-ring part connected to the central rotating part, the semi-ring part is arranged around the central rotating part, the blocking part is arranged at one end of the semi-ring part, and the blocking part and the other end of the semi-ring part form a notch; when the locking member is in the locking position, the blocking part is at least partially located in the first path to block the firing handle located in the first path; when the locking member is in the unlocking position, the blocking part leaves the first path and at least partially the notch is located in the first path to avoid the firing handle moving along the first path.

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