Surgical instrument

Abstract

The invention discloses a surgical instrument which comprises an operation assembly, a jaw assembly and a cutting knife assembly. A handle; a closing mechanism; a cutting blade driving member; the handle is operably in transmission connection with the cutting knife driving piece through the matching structure; a motor assembly; a switch member; when the limiting piece is located at the locking position, the limiting matching structure enables the handle to be separated from the cutting knife driving piece, and the switch piece is in an open-circuit state; in response to first actuation of the handle, the closing mechanism drives the jaw assembly to be switched to the closing position and drives the limiting piece to move to the unlocking position; at the unlocking position, the limiting part relieves the limiting of the matching structure and enables the switch part to be in an on state; in the closed state, in response to subsequent actuation of the handle, the motor assembly is started and drives the cutting knife driving piece to move, and the matching structure drives the cutting knife driving piece to move. Through the arrangement of the limiting piece, the handle drive limits electric drive and manual drive while the jaw is closed, and the structure is simple and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a surgical instrument. Background Art

[0002] Surgical cutting staplers are commonly used medical instruments to replace 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 that is precisely 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.

[0003] The surgical instrument includes a jaw assembly, a cutting knife assembly and an operating assembly. The operating assembly is connected to the jaw assembly and the cutting knife assembly. When performing surgery, the medical staff operates the operating assembly, first closing the jaw assembly to squeeze the patient's tissue, and the cutting knife assembly can advance to cut the tissue, and at the same time, the staples in the stapler are fired for suturing. The operating assembly is generally provided with two handles, which respectively control the closing of the jaws and the advancing of the cutting knife, but the structure is complex and the operation is cumbersome. In the prior art, there is a stapler in which a single handle can control the closing of the jaws and the advancing of the cutting knife. When the cutting knife advances, it is driven by two driving modes: electric drive and manual drive. Both the electric drive and the manual drive are triggered by the actuation of the handle. The handle controls the closing of the jaw assembly when it is actuated for the first time. When the handle is actuated for the first time, it is necessary to limit the actuation of the handle so that the cutting knife cannot be advanced by electric drive or manual drive. In the prior art, the electric drive and the manual drive are generally limited by different components, and the structure is relatively complex. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a surgical instrument that controls the squeezing and firing of the stapler through a single handle. When the handle drives the jaws to close, a single limiter is used to limit the effects of the electric drive and manual drive on the cutting knife drive. The structure is simple and reliable.

[0005] The present invention is achieved through the following technical solutions:

[0006] A surgical instrument comprises an operating assembly, a jaw assembly and a cutting knife assembly, wherein the operating assembly comprises:

[0007] frame;

[0008] a handle rotatably disposed on the frame, the handle being operated for first actuation and subsequent actuation;

[0009] a closing mechanism connected to the jaw assembly;

[0010] A cutting blade driving member connected to the cutting blade assembly;

[0011] A matching structure, wherein the handle is operably connected to the cutting blade drive member through the matching structure;

[0012] A motor assembly connected to the cutting blade drive member;

[0013] A switch component, arranged on the frame;

[0014] A limiter, movably disposed on the frame, having a locking position and an unlocking position;

[0015] In the locked position, the limiter limits the matching structure to separate the handle from the cutting knife driving member, and the limiter puts the switch member in an off-circuit state; in response to the first actuation of the handle, the closing mechanism drives the jaw assembly to switch from the open position to the closed position and keeps the jaw assembly in the closed position, and drives the limiter to move from the locked position to the unlocked position;

[0016] In the unlocked position, the limit member releases the limit on the mating structure so that the handle can cooperate with the cutting knife drive member through the mating structure, and acts on the switch member to put the switch member in a passage state; in the passage state, in response to subsequent actuation of the handle, the motor assembly starts and drives the cutting knife drive member to move distally, and the mating structure drives the cutting knife drive member to move distally, thereby simultaneously driving the cutting knife assembly.

[0017] Furthermore, the limit member includes a blocking portion and a protruding portion; when the limit member is located in the unlocking position, the protruding portion acts on the switch member to put the switch member in a passage state, the blocking portion is separated from the matching structure, and the handle can cooperate with the cutting knife driving member through the matching structure; when the limit member is located in the locking position, the blocking portion acts on the matching structure to separate the handle from the cutting knife driving member, and the protruding portion is separated from the switch member to put the switch member in a circuit-breaking state.

[0018] Furthermore, the closing mechanism includes a connecting rod assembly, which is connected to the jaw assembly. When the handle is actuated for the first time, the handle and the connecting rod assembly are operably engaged to drive the connecting rod assembly to switch from a first position to a second position, thereby driving the jaw assembly to switch from the open position to the closed position; during the process of switching from the first position to the second position, the connecting rod assembly drives the limit member to switch from the locked position to the unlocked position.

[0019] Furthermore, the limit member includes a protrusion, and when the connecting rod assembly is located at the first position, the protrusion is separated from the connecting rod assembly, so that the limit member is in a locked position; during the movement of the connecting rod assembly from the first position to the second position, the connecting rod assembly resists the protrusion to drive the limit member to move to an unlocked position.

[0020] Furthermore, the connecting rod assembly includes a first connecting rod and a second connecting rod, the first connecting rod is rotatably connected to the rod body assembly, one end of the second connecting rod is rotatably connected to the first connecting rod, and the other end is rotatably connected to the frame; when the connecting rod assembly is in the first position, the first connecting rod and the second connecting rod form a certain angle with each other; when the connecting rod assembly is in the second position, the connecting rod assembly is located at a dead point or substantially at a dead point, so that the connecting rod assembly is locked in the second position; when the connecting rod assembly moves to the second position, the limiting member is driven to switch from the unlocking position to the unlocking position by the first connecting rod or the second connecting rod, and when the connecting rod assembly is locked in the second position, the limiting member is maintained in the unlocking position.

[0021] Furthermore, the surgical instrument further comprises a main control module, a cutting knife detection device, and a handle detection device, wherein the main control module is electrically connected to the handle detection device and the cutting knife detection device, wherein the cutting knife detection device is used to obtain a cutting knife detection signal indicating the position of the cutting knife assembly, and the main control module determines whether the cutting knife assembly has cut to the bottom according to the cutting knife detection signal, and the handle detection device is used to obtain a handle detection signal indicating the position information of the handle, and the main control module determines the position of the handle according to the handle detection signal;

[0022] When the switch is in the passage state, the main control module determines that the cutting knife assembly has not cut to the bottom and determines that the position of the handle meets the preset conditions, and then controls the motor assembly to drive the cutting knife drive member to move toward the distal end.

[0023] Furthermore, the switch component is electrically connected to the main control module, and when the switch component is in the passage state, it sends a passage signal to the main control module. When the main control module receives the passage signal and determines that the cutting knife assembly has not cut to the bottom, and determines that the position of the handle meets the preset conditions, it controls the motor assembly to drive the cutting knife drive component to move toward the distal end.

[0024] Furthermore, the handle has an initial position and a pressing position, and a first area and a second area are formed between the initial position and the pressing position. When the handle moves from the initial position to the pressing position, it passes through the first area and the second area in sequence; when the main control module determines that the handle is located in the second area based on the handle detection signal, it further determines that the position of the handle meets the preset condition.

[0025] Furthermore, the motor assembly includes a motor and a power supply, and the switch element is connected in series between the motor and the power supply. When the switch element is in the on state, the motor is connected to the power supply, and when the switch element is in the off state, the motor is disconnected from the power supply.

[0026] Furthermore, the cutting knife driving member includes a rack, and the matching structure includes a pawl, and the pawl is rotatably connected to the handle; when the limiting member is in the locking position, the pawl is pressed by the blocking portion to separate the pawl from the rack, and then the handle is separated from the rack; when the limiting member is in the unlocking position, the blocking portion is separated from the pawl to release the limitation on the pawl, and in response to the actuation of the handle, the pawl cooperates with the rack to make the handle and the rack transmission connected.

[0027] Furthermore, the mating structure includes a first mating component and a second mating component, the handle is operably mated with the first mating component, the second mating component is mated with the cutting knife drive, and the first mating component and the second mating component are detachably mated; when the limit member is located at the locking position, the blocking portion stops the first mating component and / or the second mating component to separate the first mating component from the second mating component, thereby separating the handle from the cutting knife drive; when the limit member is located at the unlocking position, the blocking portion releases the stop on the first mating component and / or the second mating component to connect the first mating component and the second mating component, thereby enabling the handle to engage with the cutting knife drive through the mating structure.

[0028] Further, the cutting knife driving member includes a toothed member; the first mating component includes a first gear and a first ratchet portion connected to the first gear, and the first gear is operably matched with the handle; the second mating component includes a second gear and a second ratchet portion connected to the second gear, and the second gear is matched with the toothed member; when the first mating component and the second mating component are connected, the first ratchet portion cooperates with the second ratchet portion, and in response to subsequent actuation of the handle, the first gear drives the second gear through the first ratchet portion and the second ratchet portion, so that the second gear drives the toothed member to move; when the first mating component and the second mating component are separated, the first ratchet portion separates from the second ratchet portion.

[0029] Furthermore, the limit member is movably arranged on the frame, and when the limit member is in a locked position, the blocking portion is located between the matching structure and the cutting knife driving member to stop the matching structure so that the handle is separated from the cutting knife driving member; when the limit member is in an unlocked position, the blocking portion is disengaged from the matching structure and the cutting knife driving member so that the handle can be matched with the cutting knife driving member through the matching structure.

[0030] Compared with the prior art, the beneficial effect of the present invention is that when the handle of the surgical instrument is actuated for the first time, the limiting matching structure of the limiting member in the locked state prevents the handle from driving the cutting knife driving member to move through the matching structure, and at the same time, the switch member is in the disconnected state, so that the first actuation of the handle cannot cause the motor assembly to start driving the knife to advance. Through the setting of the limiting member, the handle drive simultaneously limits the electric drive and the manual drive when the jaws are closed, and the structure is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a surgical instrument according to a first embodiment of the present invention;

[0032] Figure 2 is a schematic structural diagram of a cutting blade assembly and a cutting blade driving member according to a first embodiment of the present invention;

[0033] Figure 3 is a schematic structural diagram of a handle, a matching structure and a cutting knife driving member according to a first embodiment of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the limiting matching structure of the limiting member according to the first embodiment of the present invention;

[0035] Figure 5 is a schematic structural diagram of the connection between the motor assembly and the cutting blade driving member according to the first embodiment of the present invention;

[0036] Figure 6It is a schematic structural diagram of the first embodiment of the present invention when the jaw assembly is closed and the limiting portion is in a locked position;

[0037] Figure 7 is a schematic structural diagram of a limiting member pressing against a ratchet pawl in a first embodiment of the present invention;

[0038] Figure 8 is a schematic structural diagram of a first embodiment of the present invention in which a limiting member is lifted by a connecting rod structure;

[0039] Fig. 9 yes Figure 4 A partial enlarged view of the middle A;

[0040] Fig.10 It is a schematic structural diagram of a switch member disposed on the upper side of a limiting member in a first embodiment of the present invention;

[0041] Fig.11 is a structural schematic diagram of the position of the pawl when the limiting member of the first embodiment of the present invention is in the unlocked state;

[0042] Fig.12 is a schematic structural diagram of a pawl according to a first embodiment of the present invention;

[0043] Fig.13 is a schematic structural diagram of the pawl and the rack in the first embodiment of the present invention when they cooperate;

[0044] Fig.14 It is a schematic structural diagram of the ratchet driving the rack to move toward the distal end in the first embodiment of the present invention;

[0045] Fig.15 is a schematic structural diagram of a handle located in a first area according to a first embodiment of the present invention;

[0046] Fig.16 is a schematic structural diagram of the handle of the first embodiment of the present invention being located in the second area;

[0047] Fig.17 is a schematic structural diagram of a handle detection device according to a first embodiment of the present invention;

[0048] Fig.18 It is a schematic structural diagram of a magnet installed on a handle according to a first embodiment of the present invention;

[0049] Fig.19 is a schematic structural diagram of the handle of the first embodiment of the present invention when it is in the initial position;

[0050] Fig. 20 is a schematic structural diagram of the handle of the first embodiment of the present invention when it is in a pressing position;

[0051] Fig.21is a schematic structural diagram of a handle in a second embodiment of the present invention when it is in an initial position;

[0052] Fig. 22 is a structural schematic diagram of a matching structure of a second embodiment of the present invention;

[0053] Fig.23 is a schematic structural diagram of the engagement between the handle and the first gear according to the second embodiment of the present invention;

[0054] Fig.24 is a schematic structural diagram of a connecting rod assembly and a limiting member according to a second embodiment of the present invention;

[0055] Fig.25 is a structural schematic diagram of a connecting rod assembly in a second position according to a second embodiment of the present invention;

[0056] Fig.26 is a schematic structural diagram of a position-limiting member according to a second embodiment of the present invention;

[0057] Fig. 27 is a structural schematic diagram of a limiting matching structure of a limiting member according to a second embodiment of the present invention;

[0058] Fig.28 It is a side view of a limiting cooperation mechanism of a limiting member according to a second embodiment of the present invention;

[0059] Fig.29 It is a structural schematic diagram of the unrestricted matching structure of the limiting member according to the second embodiment of the present invention;

[0060] Fig.30 is a side view of the un-limited matching structure of the limiting member according to the second embodiment of the present invention;

[0061] Fig.31 is a schematic structural diagram of a position-limiting member according to a third embodiment of the present invention;

[0062] Fig.32 is a schematic structural diagram of a position-limiting member according to a third embodiment of the present invention from another angle;

[0063] Fig.33 is a schematic structural diagram of a third embodiment of the present invention in which the limiting member is in a locked state;

[0064] Fig.34 is a side view of a third embodiment of the present invention, in which the limiting member is in a locked state;

[0065] Fig.35 is a schematic structural diagram of a third embodiment of the present invention in which the limiting member is in an unlocked state;

[0066] Fig.36 is a side view of a third embodiment of the present invention, in which the limiting member is in an unlocked state;

[0067] Fig.37 It is another arrangement mode of the switch member of the third embodiment of the present invention, and is a side view of the limit member in a locked state;

[0068] Fig.38 This is another arrangement of the switch member according to the third embodiment of the present invention, and is a side view of the limit member in an unlocked state.

[0069] in:

[0070] 100, handle; 110, supporting part; 120, first area; 130, second area; 140, first tooth part; 150, gripping part; 160, hinged part; 170, rotating part; 180, Hall sensor; 190, magnet;

[0071] 200, closing mechanism; 210, connecting rod assembly; 211, first connecting rod; 212, second connecting rod; 220, shaft assembly; 221, outer sleeve; 222, inner sleeve;

[0072] 300, jaw assembly; 310, nail magazine seat; 320, nail support seat;

[0073] 400, operating assembly; 410, frame; 411, support platform; 420, sliding shaft;

[0074] 500, cutting knife assembly;

[0075] 600, cutting knife driving member; 601, rack; 610, matching structure; 611, ratchet; 612, extending protrusion; 620, elastic member; 630, first matching component; 631, first gear; 632, first ratchet; 633, first seat; 634, first shaft; 635, first elastic member; 7640, second matching component; 641, second gear; 642, second ratchet;

[0076] 700, stopper; 710, main body; 711, extension; 720, blocking portion; 730, protrusion; 750, moving portion; 751, sliding portion; 752, guide portion; 761, guide slope; 762, matching slope; 770, spring; 780, screw;

[0077] 800, motor assembly; 810, switch component; 820, gear assembly. DETAILED DESCRIPTION

[0078] 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.

[0079] It should be understood that the terms "proximal" and "distal" used herein are relative to the clinician who manipulates the handle of the stapler. The term "proximal" refers to the part close to the clinician, and the term "distal" refers to the part away from the clinician. That is, the handle is the proximal side, and the jaw assembly is the distal side. For example, the proximal end of a component represents the end relatively close to the handle, and the distal end represents the end relatively close to the jaw assembly. The terms "upper" and "lower" are based on the relative positions of the anvil and the staple magazine seat of the jaw assembly. Specifically, the anvil is at the "upper" and the staple magazine seat is at the "lower". However, the stapler can be used in many directions and positions, so these terms expressing relative positional relationships are not restrictive and absolute.

[0080] In the present invention, unless otherwise clearly specified and limited, the terms such as "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a movably connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, 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 invention can be understood according to specific circumstances. It should be noted that when there are qualifiers before "connected" and "connection", they have the meaning defined by the corresponding qualifiers, and only exclude situations that obviously need to be excluded, and do not exclude other possible situations. For example, "detachably connected" refers to a detachable connection, and does not include integration, but movable connection, etc. are not excluded.

[0081] Example 1

[0082] This embodiment discloses a surgical instrument, which may be a stapler, such as Figure 1 and Figure 2As shown, it includes an operating assembly 400, a jaw assembly 300 connected to the operating assembly 400, and a cutting knife assembly 500. The jaw assembly 300 includes a staple cartridge seat 310 and an anvil seat 320. A staple cartridge assembly (not shown in the figure) is detachably mounted in the staple cartridge seat 310. The anvil seat 320 is rotatably connected to the staple cartridge seat 310. The rotation of the anvil seat 320 enables the jaw assembly 300 to have an open position and a closed position. In response to the operation of the operating assembly 400 by medical personnel, the jaw assembly 300 switches between the open position and the closed position. When the jaw assembly 300 is in the open position, human tissue can enter the jaw assembly 300. When the jaw assembly 300 is in the closed position, the tissue is clamped and squeezed. When the tissue is in a squeezed state, in response to the operation of the operating assembly 400 by medical personnel, the cutting knife assembly 500 advances to cut the tissue, and the staple cartridge assembly takes out the staples to suture the cut tissue.

[0083] In this embodiment, Figures 1 to 4 , Fig. 9 As shown, the operating assembly 400 includes a frame 410, a handle 100, a closing mechanism 200, a cutting blade driving member 600, a matching structure 610, a motor assembly 800, a switch member 810 and a stopper 700. The handle 100 is rotatably arranged on the frame 410, and an elastic assembly (not shown in the figure) is arranged between the handle 100 and the frame 410. The handle 100 has an initial position and a pressing position. The medical staff can press the handle 100 to move the handle 100 from the initial position to the pressing position. When the handle 100 is released, the handle 100 can rebound from the pressing position to the initial position under the action of the elastic assembly. The process of the handle 100 moving from the initial position to the pressing position is called actuation. During the surgical procedure, the handle 100 is operated to perform multiple actuations, including a first actuation and subsequent actuations, wherein the subsequent actuations are actuations other than the first actuation, wherein the first actuation of the handle 100 can drive the jaw assembly 300 to switch to a closed position to squeeze the tissue through the closing mechanism 200, and the subsequent actuation of the handle 100 can drive the cutting knife assembly 500 forward for firing.

[0084] The handle 100 is connected to the cutting knife drive 600 by means of the matching structure 610, so that the subsequent actuation of the handle 100 can drive the cutting knife drive 600 to move, and then drive the cutting knife assembly 500 to fire. However, the cutting cannot be started when the jaw assembly 300 is not closed. Therefore, when the jaw assembly 300 is in the open position and the handle 100 is in the process of driving the jaw assembly 300 to switch to the closed position for the first time, the limiter 700 is in the locked position, and the matching structure 610 separates the handle 100 from the cutting knife drive 600. Separation means that the handle 100 and the cutting knife drive 600 are not connected and cannot be transmitted. The handle 100 cannot drive the cutting knife drive 600 to move. The actuation of the handle 100 can only drive the closing mechanism 200 to close the jaw assembly 300, but cannot drive the cutting knife assembly 500 to advance.

[0085] The stopper 700 is movably disposed on the frame 410, and switches between the locked position and the unlocked position by movement. When the handle 100 is actuated for the first time, the closing mechanism 200 is driven to move, so that the jaw assembly 300 is closed, and the movement of the closing mechanism 200 causes the stopper 700 to move from the locked position to the unlocked position. After the jaw assembly 300 is in the closed state, the stopper 700 is located in the unlocked position, releasing the limit on the matching structure 610, so that the handle 100 can be connected to the cutting knife drive 600 by transmission, and the subsequent actuation of the handle 100 can drive the cutting knife drive 600 to move, thereby driving the cutting knife assembly 500 to fire.

[0086] In this embodiment, the handle 100 and the motor assembly 800 can both provide power for the firing of the cutting knife assembly 500. The motor assembly 800 is arranged on the frame 410 and is in transmission connection with the cutting knife driving member 600. The cutting knife driving member 600 is specifically a rack 601. The motor assembly 800 is meshed with the rack 601 through the gear assembly 820. When the motor assembly 800 is working, it drives the gear assembly 820 to rotate, drives the rack 601 to move through the gear assembly 820, and then drives the cutting knife driving member 600 to move toward the distal end. The switch member 810 is arranged on the frame 410 and is electrically connected to the motor assembly 800. The switch member 810 has a circuit state and a circuit breaker state. When the switch member 810 is in the circuit state, the motor assembly 800 can be started to drive the cutting knife driving member 600; when the switch member 810 is in the circuit breaker state, the motor assembly 800 cannot be started and is in a shutdown state. During the first actuation of the handle 100 to drive the jaw assembly 300 to close, the switch 810 is in an off-circuit state, and the motor assembly is in a stopped state, and cannot drive the rack 601 to move. When the handle 100 is subsequently actuated to drive the rack 601 to move toward the distal end, the switch 810 is in a pass state, and the motor assembly 800 can be started to drive the rack 601 to move.

[0087] like Figure 4 and Fig. 9 As shown, when the jaw assembly 300 is in the open state, the limit member 700 is in the locked position, so that the switch member 810 is in the off-circuit state, and the motor assembly 800 cannot be started; at the same time, the limit member 700 limits the matching structure 610 to separate the handle 100 from the rack 601. When the handle 100 is actuated for the first time, it can only drive the closing mechanism 200 to move to close the jaw assembly 300. During the closing process of the jaw assembly 300, the switch member 810 is always in the off-circuit state; the first actuation of the handle 100 cannot start the motor assembly 800 to drive the rack 601 to move, nor can it drive the rack 601 to move through the matching structure 610. After the first actuation is completed and the jaw assembly 300 is in the closed state, as shown in FIG. Figure 6 As shown, the limiter 700 is in the unlocked position, at which time the switch 810 is in the passage state, and the limiter 700 releases the limit on the matching structure 610, so that the handle 100 can match with the rack 601 through the matching structure 610. When the handle 100 is subsequently actuated, the motor assembly 800 can be started to drive the rack 601 to move toward the distal end, and the rack 601 can also be driven to move toward the distal end through the matching structure 610. The cutting power is sufficient, and thick tissue can be cut smoothly.

[0088] In a preferred embodiment, the switch member 810 is a push-type switch, and the limit member 700 is separated from the switch member 810 when it is in the locked position, and the switch member 810 is not pressed and is in an open circuit state. When the limit member 700 moves to the unlocked position, it presses the switch member 810, so that the switch member 810 is pressed and is in an open circuit state.

[0089] In other embodiments, the switch 810 may be an inductive switch, such as a photoelectric sensor, which generates an electrical signal when irradiated with light. A light source is provided on the frame 410. When the limit member 700 is in the locked position, the switch 810 is irradiated with light emitted by the light source, generates an electrical signal, and is in an open circuit state. When the limit member 700 moves to the unlocked position, a portion of the limit member 700 is located on the path of the light emitted by the light source, blocking the light irradiating the photoelectric sensor. The switch 810 cannot generate an electrical signal, or the generated electrical signal is small, and is thus in an open circuit state. Of course, the switch 810 may also be other types of inductive switches, such as distance sensors, Hall sensors, etc. In this application, only photoelectric sensors are used as an example for illustration, and other types of inductive switches are not described in detail.

[0090] like Figures 6 to 9As shown, the limiting member 700 is rotatably connected to the frame 410, and moves from the locked position to the unlocked position by rotating. The limiting member 700 includes a main body 710, a blocking portion 720 and an extension portion 711, wherein the blocking portion 720 is connected to the main body 710, and the extension portion 711 is connected to the main body 710. The extension portion 711 can be in the shape of a strip, extending from the main body 710, and is used to act on the switch member 810 in the unlocked position. The main body 710 is rotatably connected to the frame 410. When the limiting member 700 is located in the locked position, the blocking portion 720 acts on the matching structure 610 to limit the matching structure 610, and the extension portion 711 is separated from the switch member 810 to put the switch member in an open circuit state. When the limiting member 700 is located in the unlocked position, the blocking portion 720 is separated from the matching structure 610 to contact the matching structure 610 to limit the matching structure 610, and the extension portion 711 acts on the switch member 810 to put the switch member in a passage state. Preferably, the blocking portion 720, the extension portion 711 and the main body 710 are integrally arranged. Furthermore, the limiter 700 also includes an elastic member (not shown in the figure), which can be a torsion spring. The elastic member is connected between the main body 710 and the frame 410. The elastic member applies elastic force to the limiter 700 to keep the limiter 700 in the locked position, and the matching structure 610 is always limited. When the limiter 700 is driven by the connecting rod assembly 210 to move to the unlocked position, the elastic member is compressed. At the same time, the elastic member makes the limiter 700 in the locked position before the handle 100 is actuated for the first time. During the subsequent actuation, the limiter 700 rotates and switches to the unlocked position to act on the switch 810.

[0091] A torsion spring (not shown in the figure) is arranged between the limiter 700 and the frame 410. When the limiter 700 is in the locked position, the torsion spring is in the initial state; when the limiter 700 is in the unlocked position, the torsion spring is in a torsion state. When the jaw assembly 300 is in the closed position and the closing mechanism 200 makes the limiter 700 in the unlocked position, the torsion spring is twisted; when the jaw assembly 300 is in the open position and the closing mechanism 200 does not limit the position of the limiter 700, the limiter 700 is kept in the locked position under the action of the torsion spring.

[0092] like Fig. 9 As shown, the switch member 810 is disposed at the far side of the limit member 700, and the limit member 700 can press and trigger the switch member 810 by rotating. When the switch member 810 is a push-type switch member 810, the limit member 700 presses the switch member 810 through the extension 711 in the unlocked position, so that the switch member 810 is in a pass state; when the switch member 810 is a photoelectric sensor, the extension 711 blocks the light from the light source irradiating the photoelectric sensor in the unlocked position. In other embodiments, such as Fig.10As shown, the switch member 810 can be arranged on the upper side of the limit member 700, and the extension 711 is arranged on the side of the limit member 700 facing the switch member 810. When the limit member 700 is in the unlocked position, it presses and triggers the limit member 700, so that the switch member 810 is in the passage state. The frame 410 is provided with a circuit board, and the switch member 810 is arranged on the circuit board. When the limit member 700 rotates between the locked position and the unlocked position, it is away from the circuit board to avoid interference with the circuit board. The arrangement of the extension 711 can enable the limit member 700 to better trigger the switch member 810.

[0093] like Figure 4 and Figure 6 As shown, the closing mechanism 200 includes a shaft drive and a shaft assembly 220, the shaft assembly 220 is connected to the jaw assembly 300, the shaft drive is connected to the shaft assembly 220, when the handle 100 is actuated for the first time, the handle 100 is operably engaged with the shaft drive, so that the handle 100 can drive the shaft drive to move, and the shaft drive can drive the shaft assembly 220 to move when moving, thereby switching the jaw assembly 300 from the open position to the closed position. Specifically, the shaft assembly 220 includes an inner sleeve 222 and an outer sleeve 221, the outer sleeve 221 is sleeved on the inner sleeve 222, and the outer sleeve 221 can move relative to the inner sleeve 222, one end of the outer sleeve 221 is connected to the shaft drive, and the other end is connected to the jaw assembly 300. In response to the first actuation of the handle 100, the shaft drive member switches from the first position to the second position to drive the outer sleeve 221 to move, and the movement of the outer sleeve 221 causes the jaw assembly 300 to switch from the open position to the closed position. After the handle 100 is switched to the pressing position, the shaft drive member is locked in the second position, thereby locking the position of the outer sleeve 221, and the jaw assembly 300 remains in the closed position. When the handle 100 rebounds from the pressing position to the initial position, the shaft drive member remains in the second position and does not move with the handle 100, and the outer sleeve 221 also remains in a position that causes the jaw assembly 300 to be in the closed position.

[0094] The shaft drive member includes a connecting rod assembly 210, such as Figure 4 and Figure 6As shown, the connecting rod assembly 210 includes a first connecting rod 211 and a second connecting rod 212. The first connecting rod 211 is rotatably connected to the shaft assembly 220, specifically to the outer sleeve 221; one end of the second connecting rod 212 is rotatably connected to the frame 410, and the other end is rotatably connected to the first connecting rod 211, forming a two-link mechanism. When the connecting rod assembly 210 is in the first position, the first connecting rod 211 and the second connecting rod 212 form a certain angle with each other, and the first connecting rod 211 and the second connecting rod 212 are both inclined toward the lower side (the side close to the gripping portion of the handle 100). When the link assembly 210 is located at the first position and the handle 100 is not actuated for the first time, the handle 100 contacts the first link 211 or the second link 212, so that the handle 100 can drive the link assembly 210 to move, wherein the distal end of the first link 211 is rotatably connected to the outer sleeve 221, and the proximal end is rotatably connected to the second link 212, and the first link 211 and the second link 212 are rotatably connected through a hinge point. During the switching process of the link assembly 210 from the first position to the second position, the hinge point gradually moves to the upper side (the side away from the gripping portion of the handle 100), and since the proximal end of the second link 212 is connected to the frame 410, the hinge point at the distal end of the second link 212 moves distally, and at the same time, the rotation of the first link 211 causes the distal end of the first link 211 to move toward the distal side, so that the link assembly 210 can drive the outer sleeve 221 to move distally to close the jaw assembly 300.

[0095] like Figure 6 As shown, when the connecting rod assembly 210 is located at the second position, the connecting rod assembly 210 is located at the dead point or substantially at the dead point. Being located at the dead point means that the first connecting rod 211 and the second connecting rod 212 are located on the same straight line, and the angle between the two is 180°. Being substantially at the dead point means that the first connecting rod 211 and the second connecting rod 212 pass the dead point position, and the angle between the first connecting rod 211 and the second connecting rod 212 is greater than 0° and less than 5°. When the connecting rod assembly 210 is located at the dead point or substantially at the dead point, the pressure angle between the first connecting rod 211 and the second connecting rod 212 is substantially equal to 90°. When the first connecting rod 211 or the second connecting rod 212 is subjected to an external force from the sleeve assembly 220, the torque on the other connecting rod is zero, so that the connecting rod assembly 210 cannot move, and the connecting rod assembly 210 is locked in the second position.

[0096] Further, the handle 100 is provided with a supporting portion 110, which is located at the lower side of the connecting rod assembly 210. When the connecting rod assembly 210 switches from the first position to the second position, the handle 100 supports the first connecting rod 211 or the second connecting rod 212 through the supporting portion 110 to be operably engaged with the shaft driving member. When the connecting rod assembly 210 is in the second position and locked in the second position, the supporting portion 110 is separated from the connecting rod assembly 210 when the handle 100 is reset and rebounded. When the handle 100 is subsequently actuated, the handle 100 switches from the initial position to the pressing position, and the supporting portion 110 moves with the movement of the handle 100. The supporting portion 110 contacts the connecting rod assembly 210 located in the second position only when the handle 100 reaches the pressing position (the end point of the movement trajectory of the supporting portion 110), that is, the supporting portion 110 does not contact the connecting rod assembly 210 during the movement, so the handle 100 cannot drive the connecting rod assembly 210 during the subsequent actuation. Specifically, the supporting portion 110 is a rod body, and the handle 100 is operably engaged with the rod body driving member by supporting the second connecting rod 212 through the supporting portion 110. During the rotation of the second connecting rod 212, the supporting portion 110 can always support the second connecting rod 212.

[0097] As can be seen from the above, the first actuation of the handle 100, that is, the first operation from the initial position to the pressing position, causes the connecting rod assembly 210 to switch from the first position to the second position, and the movement of the connecting rod assembly 210 causes the shaft assembly 220 to displace so that the jaw assembly 300 switches from the open position to the closed position; at the same time, the movement of the connecting rod assembly 210 drives the limit member 700 to switch from the locked position to the unlocked position; during this process, the mating structure 610 is limited by the limit member 700, the switch member 810 is in an open circuit state, and the cutting knife assembly 500 cannot be driven to advance. After the first actuation is completed, the handle 100 is released, the handle 100 rebounds to the initial position, the connecting rod assembly 210 is locked in the second position, and the handle 100 is separated from the connecting rod assembly 210. During the subsequent actuation, the handle 100 is operated from the initial position to the pressing position again, and the handle 100 is separated from the connecting rod assembly 210 located in the second position. Only at the end of the movement path of the handle 100 will the handle 100 contact the connecting rod assembly 210, and the connecting rod assembly 210 cannot be driven to move. Therefore, the handle 100 will not change the position of the connecting rod assembly 210 during the subsequent actuation, and the connecting rod assembly 210 remains in the second position, and the limit member 700 remains in the unlocked position, thereby keeping the switch member 810 in the passage state, and the matching structure 610 is also unlocked.

[0098] The connecting rod assembly 210 drives the limiting member 700 specifically through the following structure: Figure 7 and Figure 8As shown, the stopper 700 further includes a protrusion 730, which is disposed on the body 710. When the connecting rod assembly 210 drives the jaw assembly 300 to switch from the open position to the closed position, the protrusion 730 is pressed against the stopper 700, and the stopper 700 is driven to rotate by the protrusion 730. During the movement of the connecting rod assembly 210, the connecting rod assembly 210 does not contact the body 710 or the blocking portion 720 to prevent interference. When the connecting rod assembly 210 keeps the jaw assembly 300 in the closed position, it still presses against the protrusion 730 to keep the stopper 700 in the unlocked position.

[0099] In one embodiment, if Figure 6 , Fig. 9 As shown, the protrusion 730 is a rod body, which is protruded from the main body 710, so that the stopper 700 can always abut against the connecting rod assembly 210 when being pushed and rotated by the connecting rod assembly 210. In another embodiment, as Figure 7 , Figure 8 As shown, the protrusion 730 is L-shaped, including two sides, and a corner is formed between the two sides. When the protrusion 730 contacts the connecting rod assembly 210, it first contacts the connecting rod assembly 210 through the corner of the L-shaped protrusion 730. When the stopper 700 is in the unlocked position, the protrusion 730 abuts against the connecting rod assembly 210 through one side, thereby increasing the contact area with the connecting rod assembly 210, thereby increasing the stability of maintaining the unlocked position. Specifically, the protrusion 730 abuts against the second connecting rod 212 of the connecting rod assembly 210.

[0100] like Figures 3 to 13 As shown, the matching structure 610 includes a pawl 611 and an elastic member 620. The pawl 611 is rotatably connected to the handle 100. When the pawl 611 matches with the rack 601, the transmission connection between the handle 100 and the rack 601 is realized. The elastic member 620 is a torsion spring (not shown in the figure). One end of the torsion spring abuts against the handle 100, and the other end abuts against the pawl 611. The elastic force provided by the torsion spring causes the pawl 611 to rotate to a position matched with the rack 601. When the limiting member 700 is in the locking position, it acts on the matching structure 610, specifically, the blocking portion 720 presses the pawl 611, so that the pawl 611 cannot match with the rack 601, and the torsion spring is compressed. When the limit member 700 is switched to the unlocked position, the pressure on the pawl 611 is released, and the pawl 611 rotates in the direction of the rack 601 under the action of the torsion spring and can cooperate with the rack 601. The pawl 611 can cooperate with the rack 610, which means that the pawl 611 is engaged with the rack 610, or the pawl 611 is separated from the rack 610. In response to the actuation of the handle 100, the pawl 611 moves toward the rack 610 to engage with the rack 610.

[0101] When the handle 100 is subsequently actuated, the rotation of the handle 100 can drive the pawl 611 to move. Fig.12 , Fig.13 and Fig.17 As shown, the handle 100 includes a gripping portion 150, a hinged portion 160 and a rotating portion 170 that are interconnected. The handle 100 is rotatably connected to the frame 410 via the hinged portion 160. The pawl 611 is connected to the handle 100. The gripping portion 150 and the pawl 611 of the handle 100 are respectively located on both sides of the hinged portion 160. When the handle 100 is pressed, it rotates counterclockwise, causing the pawl 611 to move distally, thereby driving the rack 601 to move distally, and then causing the cutting knife assembly 500 to move distally for firing.

[0102] Further, such as Fig.11 and Fig.12 As shown, the pawl 611 further includes an extension protrusion 612, which is extended along the width direction of the pawl 611. The stopper 700 presses against the pawl 611 specifically by pressing against the extension protrusion 612. The setting of the extension protrusion 612 makes the stopper 700 and the pawl 611 staggered to avoid interference between the two. Before the handle 100 is actuated for the first time, the stopper 700 is located in the locking position, and the blocking portion 720 presses against the extension protrusion 612. When the handle 100 is actuated for the first time, the limit member 700 rotates counterclockwise, the blocking portion 720 rotates synchronously with the limit member 700, and the pawl 611 rotates clockwise, so that the tip of the pawl 611 is close to the rack 601, and the blocking portion 720 always presses the extended protrusion 612; after the limit member 700 reaches the unlocking position, the pawl 611 presses against the rack 601, and the blocking portion 720 is located above the extended protrusion 612 and no longer presses the extended protrusion 612, so that the pawl 611 can drive the rack 601 to move.

[0103] The operating component 400 also includes a main control module, a cutting knife detection device and a handle detection device. The main control module is electrically connected to the motor component 800 and is used to control the start, stop and rotation direction of the motor component 800. The cutting knife detection device and the handle detection device are both electrically connected to the main control module. The cutting knife detection device is used to obtain a cutting knife detection signal indicating the position information of the cutting knife. The main control module receives the cutting knife detection signal and determines whether the cutting knife has cut to the bottom according to the cutting knife detection signal. The handle detection module is used to obtain a handle detection signal indicating the position information of the handle. The main control module receives the handle detection signal and determines the position of the handle 100 according to the handle detection signal. Optionally but not limitedly, the main control module is a processor unit that can receive, judge, process and send signals.

[0104] In one embodiment, the switch 810 is electrically connected to the motor assembly 800 and connected in series with the power supply. When the switch 810 is in an off-circuit state, the motor assembly 800 cannot be connected to the power supply. When the switch 810 is in a pass state, the motor assembly 800 is connected to the power supply and can be started under the control of the main control module. When the switch 810 is in a pass state, the main control module determines that the cutting knife assembly 500 has not cut to the bottom, and determines that the position of the handle 100 meets the preset conditions, the main control module controls the motor assembly 800 to drive the cutting knife drive member 600 to move toward the distal end.

[0105] In another embodiment, the switch component 810 is electrically connected to the main control module. When the switch component 810 is in the on state, it sends a trigger signal to the main control module. When the main control module receives the trigger signal and determines that the cutting knife assembly 500 has not cut to the bottom, and determines that the handle 100 meets the preset conditions, it controls the motor assembly 800 to start and drive the cutting knife drive component 600 to move toward the distal end, thereby driving the cutting knife assembly 500 to advance.

[0106] The switch 810 is in the passage state, which means that the limit member 700 is in the unlocked position, the connecting rod assembly 210 is in the second position, and the jaw assembly 300 is locked; the cutting knife assembly 500 has not cut to the bottom, which means that the cutting knife has not been cut or the cutting has not been completed. The above two conditions must be met before the cutting can be carried out, so that the cutting process is carried out when the jaw assembly 100 is closed and the cutting knife is not cut or the cutting is not completed, so as to avoid the situation that the staples cannot be formed due to the opening of the jaw assembly 100 during the cutting, or the cutting knife is at the end of the stroke, causing the motor to be blocked.

[0107] like Fig.15 and Fig.16 As shown, the handle 100 forms a first area 120 and a second area 130 between the initial position and the pressing position. The first area 120 is connected with the second area 130. When the handle 100 moves from the initial position to the pressing position, it passes through the first area 120 and the second area 130 in sequence. When the handle 100 is in the first area 120, it is in the initial position; when the handle 100 is in the second area 130, it is in the pressing position. When judging whether the handle 100 is in the first area 120 or the second area 130, a straight line is drawn along the length direction of the handle 100 outside the gripping portion 150 through the rotation axis of the handle 100. If the straight line is in the first area 120, it means that the handle 100 is in the first area 120. If the straight line is in the second area 130, it means that the handle 100 is in the second area 130. When the handle 100 is in the second area 130, the preset condition is met.

[0108] The first area 120 and the second area 130 are generally fan-shaped surfaces, and the first central angle of the first area 120 is greater than or equal to 5° and less than or equal to 8°. The second central angle of the second area 130 is greater than or equal to 29° and less than or equal to 32°. After the jaw assembly 300 is closed and before the cutting operation begins, the handle 100 is located in the initial position. The medical staff only needs to actuate the handle 100 to enter the second area 130. After the handle 100 rotates to the angle corresponding to the first central angle, the motor can be started to drive the cutting knife assembly 500 to advance. The medical staff maintains the position of the handle 100 so that the cutting knife assembly 500 is driven only by the motor assembly 800; the medical staff can also continue to actuate the handle 100 in the second area 130 so that the handle 100 drives the rack 601 to assist and cut thicker tissue.

[0109] The position information of the cutting blade assembly 500 includes at least one of the number of revolutions of the motor assembly 800 and the position of the cutting blade assembly 500. When the position information of the cutting blade assembly 500 includes the number of revolutions of the motor assembly 800, the number of revolutions information can represent the distance of movement of the cutting blade assembly 500, and the main control module can compare the number of revolutions of the motor assembly 800 with the preset revolution value (the revolution value for cutting to the bottom), and then judge whether the cutting blade assembly 500 has cut to the bottom; when the position information of the cutting blade assembly 500 includes the position of the cutting blade assembly 500, the main control module can directly judge whether the cutting blade assembly 500 has cut to the bottom according to the position of the cutting blade assembly 500.

[0110] In one embodiment, the position information of the cutting knife assembly 500 only includes the number of revolutions of the motor, and the cutting knife detection device includes an encoder (not shown in the figure), which is electrically connected to the motor assembly 800. The encoder is used to detect the pulse signal generated by the rotation of the motor output shaft and send the pulse signal to the main control module. The main control module obtains the number of revolutions of the output shaft based on the number of pulse signals. The number of revolutions can represent the feed stroke of the cutting knife assembly 500. When the number of pulse signals is greater than or equal to the first preset value, the main control module determines that the cutting knife assembly 500 has cut to the bottom; when the number of pulse signals is less than the first preset value, the main control module determines that the cutting knife assembly 500 has not cut to the bottom.

[0111] The encoder may be a Hall encoder (not shown in the figure), specifically including a Hall sensor and a plurality of magnets, wherein the plurality of magnets are arranged around the output shaft of the motor. When the magnet rotates with the rotating shaft of the motor, the Hall sensor senses the magnet and outputs a pulse signal, and the pulse signal is used as a detection signal. The main control module determines the number of rotations of the motor based on the number of pulse signals and the direction of rotation of the motor determined by the Hall sensor. Specifically, when the rotating shaft of the motor rotates, each time it passes a magnet, the Hall sensor outputs a pulse signal, and the pulse signal is used as a cutting knife detection signal.

[0112] The encoder can also be a photoelectric encoder, including a photoelectric sensor and multiple gratings. The photoelectric sensor can emit detection light in an infrared manner. The multiple gratings are distributed around the rotating shaft of the motor. When the rotating shaft rotates, the gratings are driven to rotate. The photoelectric sensor senses the gratings and outputs a pulse signal. The principle of the main control module determining the number of motor rotations based on the pulse signal is the same as that of the Hall sensor mentioned above, and will not be repeated here. Of course, the detection element can also be other ways to determine the number of motor rotations.

[0113] In another embodiment, the cutting knife detection device is also used to obtain a motor status signal of the motor status, and the main control module determines whether the motor is blocked based on the motor status signal. The cutting knife detection signal includes a pulse signal sent by the encoder and a motor status signal. When judging by the number of pulse signals alone, since there is an error between the cutting distance represented by the first preset value and the actual cutting distance, it is possible that when the cutting knife assembly 500 has not cut to the bottom, the number of pulse signals reaches the first preset value, and the main control module mistakenly judges that the cutting knife assembly 500 has cut to the bottom. When judging by the blocked signal alone, if thicker tissue is encountered during the cutting process, the cutting knife assembly 500 will stagnate in feeding, causing the motor to be blocked, and also causing a misjudgment. Therefore, judging the number of pulse signals together with the motor status signal can improve the accuracy of judging whether the cutting knife assembly 500 has cut to the bottom.

[0114] Therefore, in this embodiment, when the number of pulse signals is greater than or equal to the first preset value and the main control module determines that the motor assembly 800 is stalled, the main control module determines that the cutting knife has cut to the bottom; the number of pulse signals is greater than or equal to the first preset value, indicating that the distance traveled by the cutting knife has cut to the bottom or is close to cutting to the bottom, and stalling indicates that the cutting knife assembly 500 has cut to the bottom, against the nail magazine seat 310, and the rack 601 cannot continue to move forward, causing the motor to stop rotating.

[0115] When the number of pulse signals is less than the first preset value, the main control module determines that the cutting blade assembly 500 has not cut to the bottom. The judgment of not cutting to the bottom does not require the participation of the stall signal. Only when the number of pulse signals is less than the first preset value, it can be known that the movement stroke of the cutting blade assembly 500 is insufficient and the cutting has not been completed.

[0116] The motor state includes: at least one of the motor's voltage, current, and speed. The cutting blade detection device includes a detector electrically connected to the motor. The motor state signal includes at least one of the motor's voltage value, current value, and speed value. When at least one of the voltage value, current value, and speed value suddenly changes, the main control module determines that the motor assembly 800 is stalled.

[0117] In another embodiment, the cutting blade detection device includes a contact switch (not shown in the figure), which is arranged at the end of the cutting blade stroke of the cutting blade assembly 500. When the cutting blade assembly 500 cuts to the bottom, the contact switch is pressed, so that the contact switch is triggered and a trigger signal is sent to the main control module. The cutting blade detection signal includes a trigger signal. When the main control module receives the trigger signal, it determines that the cutting blade assembly 500 has cut to the bottom; the contact switch is a mechanical switch electrically connected to the main control module.

[0118] The position information of the handle 100 includes the position of the handle 100. The main control module can determine the specific position of the handle 100 according to the distance between the handle 100 and the handle detection device. Fig.17 As shown, the handle detection device includes a Hall sensor 180 and a magnet 190. The Hall sensor 180 is electrically connected to the main control module. One of the Hall sensor 180 and the magnet 190 is set on the handle 100, and the other is set on the frame 410. The handle detection signal is an electrical signal generated by the Hall sensor 180 according to the distance between the Hall sensor 180 and the magnet 190. When the handle 100 is actuated or released, the handle 100 is displaced relative to the frame 410, so that the electrical signal generated by the Hall sensor 180 changes. The specific electrical signal is a voltage signal, which represents the distance between the Hall sensor 180 and the magnet 190. When the handle 100 is in different positions, it corresponds to different voltage signals, based on which the distance between the Hall sensor 180 and the magnet 190 can be determined, and then the distance between the handle 100 and the frame 410 can be determined, and the position of the handle 100 can also be determined. The closer the distance between the Hall sensor 180 and the magnet 190 is, the larger the voltage signal is; the larger the distance between the Hall sensor 180 and the magnet 190 is, the smaller the voltage signal is.

[0119] like Figures 17 to 20As shown, the hinge 160 is rotatably connected to the frame 410. Specifically, the hinge 160 is connected to the frame 410 through a pin, and the handle 100 can rotate around the pin. The grip 150 and the rotating portion 170 are respectively located on both sides of the hinge 160, so that the rotation direction of the grip 150 is opposite to the rotation direction of the rotating portion 170, that is, when the grip 150 rotates clockwise, the rotating portion 170 rotates counterclockwise; when the grip 150 rotates counterclockwise, the rotating portion 170 rotates clockwise. In this embodiment, preferably, the magnet 190 is provided on the handle 100, and the Hall sensor 180 is provided on the frame 410. Specifically, the rotating portion 170 is located in the housing of the operating component 400 and can be sensed by the Hall sensor 180 provided on the frame 410. The grip 150 is located outside the housing, and medical personnel can operate the grip 150. The rotating part 170 is provided with a receiving hole, and the magnet 190 is received in the receiving hole, and one side surface is exposed outside the receiving hole, so as to be sensed by the Hall sensor 180. The frame 410 also includes a support platform 411, and the support platform 411 is located below the rotating part 170. When the handle 100 moves between the initial position and the pressing position, the rotating part 170 is always out of contact with the support platform 411, and the Hall sensor 180 is arranged on the support platform 411. The smaller the distance between the Hall sensor 180 and the magnet 190, the larger the voltage signal; the larger the distance between the Hall sensor 180 and the magnet 190, the smaller the voltage signal. Based on the above-mentioned arrangement of the Hall sensor 180 and the magnet 190, the main control module determines that the handle 100 is located in the second area 130 when the voltage signal is less than or equal to the second preset value; the main control module determines that the handle 100 is not in the second area 130 when the voltage is greater than the second preset value, and the main control module can identify the specific position of the handle 100 based on the comparison result between the voltage signal and the second preset value or other preset values. It should be noted that the above-mentioned judgment logic is an example, and when the arrangement of the Hall sensor 180 and the magnet 190 changes, other judgment logics may be used to judge the position of the handle 100 based on the relationship between the voltage signal and the preset value.

[0120] As can be seen from the above, when the cutting knife assembly 500 has not cut to the bottom and the handle 100 is located in the second area 130, the main control module starts the motor to drive the cutting knife driving member 600, so that the cutting knife moves toward the distal end to advance. During the advance process, the medical staff can drive the cutting knife driving member 600 by actuating the handle 100, thereby assisting the movement of the cutting knife assembly 500 toward the distal end, so that the cutting knife assembly 500 can cut thicker tissue.

[0121] It is worth noting that Fig.16As shown, when the handle 100 just enters the second area 130 and the cutting knife has not cut to the bottom, the motor starts. At this time, the pawl 611 and the rack 601 are not matched. The handle 100 continues to be actuated to a certain angle, and the pawl 611 and the rack 601 are matched. At this time, the medical staff can actuate the handle 100 to assist the cutting knife assembly 500.

[0122] After the cutting knife assembly 500 completes the advance, the main control module controls the motor assembly 800 to reverse, and drives the cutting knife assembly 500 to move toward the proximal end to retract the knife. At this time, the jaw assembly 100 is in a closed state, and the switch 810 is in a passage state, so that the motor can work normally. After the cutting knife assembly 500 returns to the initial position, the retraction is completed, and the medical staff can open the jaw assembly 100 through the unlocking assembly. The unlocking assembly is used to release the lock of the connecting rod assembly 210 in the second position. The unlocking assembly includes an operating part arranged outside the housing of the operating assembly 400, and an unlocking part located in the housing of the operating assembly 400 to resist the connecting rod assembly 210 located in the second position. The unlocking part is linked with the operating part. When the medical staff operates the operating part, the unlocking part moves and pushes the connecting rod assembly 210, so that the connecting rod assembly 210 returns to the first position, and the jaw assembly opens to release the human tissue. Specifically, the operating part can be a button arranged on the housing of the operating assembly 400, and the unlocking part is arranged in the operating assembly 400, which is a rod body that can act on the connecting rod assembly 210. The button is connected to the rod body. When the button is not operated, the rod body is located above the connecting rod assembly 210, and the connecting rod assembly 210 is self-locked in the second position; when the medical staff operates the button, the rod body moves downward to abut against and push the connecting rod assembly 210, so that the connecting rod assembly 210 is no longer in the second position, so as to release the self-locking state of the connecting rod assembly 210. The operating assembly 100 also includes a spring, one end of the spring is connected to the frame 210, and the other end is connected to the outer sleeve 221. When the connecting rod assembly 210 is in the second position, the spring is in a compressed state; when the connecting rod assembly 210 is in the first position, the spring is in a released state. When the medical staff operates the button so that the connecting rod assembly 210 is no longer in the second position, the spring is released, driving the outer sleeve 221 to move toward the proximal end, thereby moving the connecting rod assembly 210 to the first position, and opening the jaw assembly 100. When the connecting rod assembly 210 moves from the second position to the first position and no longer abuts against the limiting member 212, the limiting member 212 moves from the unlocking position to the locking position under the action of the torsion spring, so that the switch member 810 is in the disconnected state. After opening the jaw assembly 100, the medical staff can remove the jaw assembly 100 from the human body.

[0123] In the surgical instrument of this embodiment, when the handle 100 is actuated for the first time, the position limiting member 700 in the locked state limits the matching structure 610 so that the handle 100 cannot drive the cutting knife driving member 600 to move through the matching structure 610, and the switch member 810 is in the disconnected state, so that the first actuation of the handle 100 cannot start the motor assembly 800 to drive the cutting knife driving member 600 to move. Through the setting of the position limiting member 700, the handle 100 drives the movement of the electric drive and the manual drive of the cutting knife driving member 600 when the jaw assembly 300 is closed, and the structure is simple, effective, and highly reliable.

[0124] Example 2

[0125] The second embodiment of the present application discloses a surgical instrument, which is generally the same as the surgical instrument in the first embodiment, with the main difference being that the mating structure 610 is different.

[0126] like Figure 21 to Figure 25 As shown, the mating structure 610 in this embodiment includes a first mating component 630 and a second mating component 640. The first mating component 630 and the second mating component 640 are detachably mated. The first mating component 630 is used to mating with the handle 100, and the second mating component 640 is used to mating with the cutting knife driving member 600. When the first mating component 630 and the second mating component 640 are mating, the first mating component 630 can transmit with the second mating component 640, and the actuation of the handle 100 can drive the rack 601 through the first mating component 630 and the second mating component 640, thereby driving the cutting knife assembly 500 to move; when the first mating component 630 and the second mating component 640 are separated, the first mating component 630 and the second mating component 640 cannot transmit, and the actuation of the handle 100 cannot drive the rack 601 and the cutting knife assembly 500 to move.

[0127] When the handle 100 is actuated, the first tooth portion 140 is engaged with the first gear 631 when the handle 100 rotates relative to the initial position by an angle greater than or equal to a first preset angle, so that the handle 100 can drive the first gear 631; the handle 100 continues to be actuated, and the handle 100 drives the first gear 631 to rotate through the first tooth portion 140, driving the first ratchet portion 632 to rotate in the first direction, and then drives the rack 601 to move toward the distal end through the second ratchet portion 642 and the second gear 641.

[0128] Fig. 27 and Fig.28When the middle limit member 700 is in the locked position, it limits the first mating component 630 and / or the second mating component 640, so that the first mating component 630 is separated from the second mating component 640. Limitation means that the limit member 700 limits the position of the first mating component 630 and / or the second mating component 640, so that the first mating component 630 and the second mating component 640 remain in a non-contact state. Before the handle 100 is actuated for the first time, the limit member 700 is in the locked position. In response to the first actuation of the handle 100, the closing mechanism 200 drives the jaw assembly 300 to switch from the open position to the closed position. At the same time, the closing mechanism 200 drives the limit member 700 to switch from the locked position to the unlocked position. As shown in FIG. 25, the closing mechanism 200 keeps the jaw assembly 300 in the closed position and also keeps the limit member 700 in the unlocked position. In the unlocked position, as shown in FIG. Fig.29 and Fig.30 As shown, the limiting member 700 releases the limiting of the first matching component 630 and / or the second matching component 640, and the first matching component 630 cooperates with the second matching component 640, so that the handle 100 is connected to the cutting knife driving member 600 by transmission, and the handle 100 can drive the cutting knife driving member 600 to move by actuation. Specifically, in this embodiment, the limiting member 700 is rotatably arranged on the frame 410, and is rotated and switched from the locked position to the unlocked position. The closing mechanism 200 can drive the limiting member 700 to rotate, and the limiting member 700 keeps the limiting of the first matching component 630 and / or the second matching component 640 during the rotation process, until the limiting member 700 rotates to the unlocked position, and the limiting of the first matching component 630 and / or the second matching component 640 is released, and the first matching component 630 cooperates with the second matching component 640, so that the handle 100 can be connected to the cutting knife driving member 600 by transmission, and the handle 100 can drive the cutting knife driving member 600 to move by actuation.

[0129] The first mating assembly 630 includes a first gear 631 and a first ratchet portion 632. The first gear 631 and the first ratchet portion 632 are coaxially arranged and connected to each other, so that the first ratchet portion 632 and the first gear 631 move synchronously. The second mating assembly 640 includes a second gear 641 and a second ratchet portion 642. The second gear 641 and the second ratchet portion 642 are coaxially arranged and connected to each other, so that the second ratchet portion 642 and the second gear 641 move synchronously. When the first mating assembly 630 and the second mating assembly 640 are mated, the first ratchet portion 632 meshes with the second ratchet portion 642, so that the handle 100 is connected to the rack 601 in a transmission manner, specifically a one-way driving connection. When the handle 100 is actuated, it can drive the first gear 631 to rotate, and the second gear 641 is rotated through the transmission of the first ratchet portion 632 and the second ratchet portion 642. The second gear 641 drives the rack 601 to move, thereby driving the cutting knife assembly 500 to move.

[0130] The stopper 700 includes a main body 710 and a blocking portion 720. The main body 710 is rotatably disposed on the frame 410. The stopper 700 switches between a locked position and an unlocked position by rotating. The blocking portion 720 is connected to the main body 710 and is located on a side of the main body 710 close to the first seat 633. The first mating component 630 has a first seat 633, such as Figure 26 to Figure 28 As shown, when the limiting member 700 is in the locked position, the blocking portion 720 abuts against the first seat body 633 to limit the first seat body 633. The blocking portion 720 limits the first seat body 633 from moving along the axis of the first gear 631 toward the second gear 641, so that the first elastic member 635 remains in a compressed state, and the first mating component 630 is in the first separation position. Fig.29 and Fig.30 As shown, when the limiter 700 is switched to the unlocked position, the blocking portion 720 rotates with the main body 710 and separates from the first seat body 633, releasing the limit on the first seat body 633, and the blocking portion 720 no longer abuts against the first seat body 633, so that the first seat body 633 can move in the direction where the second gear 641 is located, and the first elastic member 635 is released, so that the first seat body 633, the first shaft body 634, the first gear 631 and the first ratchet portion 632 move toward the second gear 641, and the first ratchet portion 632 cooperates with the second ratchet portion 642, and the first mating component 630 switches to the first mating position. The specific structures of the first mating component 630, the second mating component 7640, and the limiter 700 can be found in the applicant's prior application CN2023103953681, which will not be repeated in this application.

[0131] The positional relationship between the limiting member 700 and the switch member 810 in the second embodiment, and the manner in which the limiting member 700 triggers the switch member 810 are the same as those in the first embodiment.

[0132] Example 3

[0133] The third embodiment of the present application discloses a surgical instrument, which is substantially the same as the surgical instrument in the first embodiment, except that the structure of the stopper 700 is different. The stopper 700 in the second embodiment is movably connected to the frame 410 and switches between a locked position and an unlocked position by movement.

[0134] like Figure 31 to Figure 33As shown, when the limiter 700 is in the locked position, the blocking portion 720 is located between the pawl 611 and the cutting knife driving member 600, separating the cutting knife driving member 600 from the pawl 611 to limit the pawl 611, so that the pawl 611 and the cutting knife driving member 600 cannot cooperate. When the limiter 700 is in the unlocked position, the stopper 740 is disengaged from between the pawl 611 and the cutting knife driving member 600 to release the limit on the pawl 611, so that the pawl 611 can cooperate with the cutting knife driving member 600. The pawl 611 can cooperate with the rack 610 means that the pawl 611 is engaged with the rack 610, or the pawl 611 is separated from the rack 610, and in response to the actuation of the handle 100, the pawl 611 moves toward the rack 610 to engage with the rack 610.

[0135] The blocking portion 720 is located between the ratchet 611 and the cutting knife driving member 600 when in the locked position, and can stably block the ratchet 611 from cooperating with the cutting knife driving member 600. During the first actuation, although the ratchet 611 does not cooperate with the cutting knife driving member 600, it still moves under the drive of the handle 100, that is, the ratchet 611 slides relative to the cutting knife driving member 600. When the ratchet 611 is displaced under the drive of the handle 100, it always abuts against the blocking portion 720. The blocking portion 720 has a sufficient length in the direction in which the ratchet 611 moves, and can stably limit the ratchet 611 and prevent the ratchet 611 from cooperating with the cutting knife driving member 600.

[0136] Further, when the stopper 700 is located at the locking position, the blocking portion 720 at least abuts against the pawl 611. The blocking portion 720 at least abuts against the pawl 611 means that the blocking portion 720 only abuts against the pawl 611, or the blocking portion 720 abuts against the pawl 611 and the cutting knife driving member 600 at the same time. In one embodiment, one side (upper side) of the blocking portion 720 abuts against the cutting knife driving member 600, and the pawl 611 abuts against the other side (lower side) of the blocking portion 720 under the action of the elastic member 620. In another embodiment, the upper side of the blocking portion 720 is separated from the cutting knife driving member 600, and the lower side abuts against the pawl 611.

[0137] The position-limiting member 700 further includes a moving portion 750, which is movably disposed on the frame 410. The moving portion 750 is connected to the blocking portion 720, and can drive the blocking portion 720 to move so that the blocking portion 720 is separated from between the pawl 611 and the cutting knife driving member 600. In the process of the closing mechanism 200 driving the jaw assembly 300 to move from the open position to the closed position, the closing mechanism 200 drives the moving portion 750 to move, thereby driving the position-limiting member 700 to switch from the locked position to the unlocked position. Specifically, in the process of the connecting rod assembly 210 switching from the first position to the second position, the connecting rod assembly 210 drives the moving portion 750 to move, and the moving portion 750 drives the blocking portion 720 to move.

[0138] The moving part 750 is slidably disposed on the frame 410. Figure 32 to Figure 34 As shown, the moving part 750 includes a sliding part 751 and a guide part 752. The sliding part 751 is slidably connected to the frame 410. The guide part 752 is connected to the sliding part 751. The guide part 752 has a guide slope 761. When the connecting rod assembly 210 switches from the first position to the second position, the connecting rod assembly 210 abuts and pushes the guide part 752 to drive the moving part 750 to move, thereby driving the blocking part 720 to disengage from between the pawl 611 and the cutting knife driving member 600. Specifically, the frame 410 is provided with a sliding shaft 420. The sliding part 751 is annularly arranged and sleeved on the sliding shaft 420. The sliding part 751 can move along the axial direction of the sliding shaft 420. The moving part 750 also includes a spring 770. The spring 770 is arranged on the side of the sliding part 751 away from the blocking part 720 and sleeved on the sliding shaft 420 to apply elastic force to the sliding part 751. A screw 780 is provided at one end of the sliding shaft 420 away from the frame 410. The screw 780 includes a stud and a nut. The stud is screwed into the sliding shaft 420 to cooperate with the sliding shaft 420. The nut is located on the side of the sliding shaft 420 away from the frame 410. One end of the spring 770 abuts against the nut, and the other end abuts against the sliding part 751. The guide portion 752 is located below the moving portion 750, and the guide slope 761 has a high side and a low side from top to bottom. In the front-to-back direction, the high side is located between the low side and the blocking portion 720. The connecting rod assembly 210 gradually moves upward during the process of switching from the first position to the second position, first abutting against the low side of the guide slope 761, pushing the guide portion 752 to move until it abuts against the high side of the guide slope 761. In the process of being pushed by the connecting rod assembly 210, the guide portion 752 drives the sliding portion 751 to move relative to the sliding shaft 420 in a direction away from the pawl 611, thereby driving the blocking portion 720 to move to disengage from between the pawl 611 and the cutting knife drive 600. During this process, the spring 770 is compressed.

[0139] Furthermore, the first connecting rod 211 and / or the second connecting rod 212 in the connecting rod assembly 210 is provided with a mating bevel 762. Specifically, the connecting rod that contacts the guide portion 752 during the process of switching the connecting rod assembly 210 from the first position to the second position is provided with a mating bevel 762. The slope of the mating bevel 762 is substantially consistent with that of the guide bevel 761, so as to better promote the movement of the guide portion 752.

[0140] In a preferred embodiment, the blocking portion 720 is arranged in a sheet shape, and the width of the blocking portion 720 is substantially the same as the width of the cutting knife driving member 600, so as to cover the surface of the cutting knife driving member 600 and prevent the pawl 611 from cooperating with the cutting knife driving member 600, while saving the material of the blocking portion 720 and facilitating the movement of the limiting member 700.

[0141] like Fig.34 and Fig.36As shown, the switch member 810 is located on the movement path of the moving part 750. When the moving part 750 moves to the unlocking position, it acts on the switch member 810. The switch member 810 is a push-type switch. When the limit member 700 is in the locking position, the switch member 810 is released and is in the disconnecting state; when the limit member 700 moves to the unlocking position, the switch member 810 is pressed by the moving part 750 and is in the connecting state. In another embodiment, as shown in FIG. Fig.37 and Fig.38 As shown, the limit member 700 is located in the locked position, and the switch member 810 is pressed and is in an open circuit state; when the limit member 700 moves to the unlocked position, the switch member 810 is released and is in a pass state. Of course, the switch member 810 can also be an inductive switch, such as a photoelectric sensor. The frame is provided with a light source, which generates an electrical signal when irradiated by light. The frame 410 is provided with a light source. When the limit member 700 is located in the locked position, the switch member 810 is irradiated by the light emitted by the light source, generates an electrical signal, and is in an open circuit state. When the limit member 700 moves to the unlocked position, part of the limit member 700 is located in the path of the light emitted by the light source, blocking the light irradiating the photoelectric sensor. The switch member 810 cannot generate an electrical signal, or the generated electrical signal is small, and is in a pass state. Of course, the switch member 810 can also be other types of inductive switches. In this application, only the photoelectric sensor is used as an example for illustration, and other types of inductive switches are not described in detail.

[0142] 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.

[0143] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A surgical instrument, comprising an operating assembly, a jaw assembly and a cutting knife assembly, characterized in that: The operating components include: frame; a handle rotatably disposed on the frame, the handle being operated for first actuation and subsequent actuation; a closing mechanism connected to the jaw assembly; A cutting blade driving member connected to the cutting blade assembly; A matching structure, wherein the handle is operably connected to the cutting blade drive member through the matching structure; A motor assembly connected to the cutting blade drive member; A switch component, arranged on the frame; A limiter, movably disposed on the frame, having a locking position and an unlocking position; In the locked position, the limiter limits the matching structure to separate the handle from the cutting knife driving member, and the limiter puts the switch member in an off-circuit state; in response to the first actuation of the handle, the closing mechanism drives the jaw assembly to switch from the open position to the closed position and keeps the jaw assembly in the closed position, and drives the limiter to move from the locked position to the unlocked position; In the unlocked position, the limit member releases the limit on the mating structure so that the handle can cooperate with the cutting knife drive member through the mating structure, and acts on the switch member to put the switch member in a passage state; in the passage state, in response to subsequent actuation of the handle, the motor assembly starts and drives the cutting knife drive member to move distally, and the mating structure drives the cutting knife drive member to move distally, thereby simultaneously driving the cutting knife assembly.

2. The surgical instrument according to claim 1, characterized in that The limiting member includes a blocking portion and a protruding portion; when the limiting member is located at the unlocking position, the protruding portion acts on the switch member to put the switch member in a passage state, the blocking portion is separated from the matching structure, and the handle can be matched with the cutting knife driving member through the matching structure; When the limiting member is located at the locking position, the blocking portion acts on the matching structure to separate the handle from the cutting blade driving member, and the extending portion is separated from the switch member, so that the switch member is in an open circuit state.

3. The surgical instrument according to claim 1, characterized in that The closing mechanism includes a connecting rod assembly, the connecting rod assembly is connected to the jaw assembly, and when the handle is actuated for the first time, the handle is operably engaged with the connecting rod assembly to drive the connecting rod assembly to switch from the first position to the second position, thereby driving the jaw assembly to switch from the open position to the closed position; During the process of switching from the first position to the second position, the connecting rod assembly drives the limiting member to switch from the locking position to the unlocking position.

4. According to the surgical instrument according to claim 3, the limit member includes a protrusion, and when the connecting rod assembly is located at the first position, the protrusion is separated from the connecting rod assembly, so that the limit member is in a locked position; during the movement of the connecting rod assembly from the first position to the second position, the connecting rod assembly resists the protrusion to drive the limit member to move to the unlocked position.

5. The surgical instrument according to claim 3, characterized in that: The connecting rod assembly includes a first connecting rod and a second connecting rod, the first connecting rod is rotatably connected to the rod body assembly, one end of the second connecting rod is rotatably connected to the first connecting rod, and the other end is rotatably connected to the frame; when the connecting rod assembly is in the first position, the first connecting rod and the second connecting rod form a certain angle with each other; when the connecting rod assembly is in the second position, the connecting rod assembly is located at a dead point or substantially at a dead point, so that the connecting rod assembly is locked in the second position; when the connecting rod assembly moves to the second position, the limiting member is driven to switch from the unlocking position to the unlocking position by the first connecting rod or the second connecting rod, and when the connecting rod assembly is locked in the second position, the limiting member is maintained in the unlocking position.

6. The surgical instrument according to claim 1, characterized in that The surgical instrument further comprises a main control module, a cutting knife detection device, and a handle detection device, wherein the main control module is electrically connected to the handle detection device and the cutting knife detection device, wherein the cutting knife detection device is used to obtain a cutting knife detection signal indicating the position of the cutting knife assembly, and the main control module determines whether the cutting knife assembly has cut to the bottom according to the cutting knife detection signal, and the handle detection device is used to obtain a handle detection signal indicating the position information of the handle, and the main control module determines the position of the handle according to the handle detection signal; When the switch is in the passage state, the main control module determines that the cutting knife assembly has not cut to the bottom and determines that the position of the handle meets the preset conditions, and then controls the motor assembly to drive the cutting knife drive member to move toward the distal end.

7. The surgical instrument according to claim 5, characterized in that The switch component is electrically connected to the main control module. When the switch component is in the on state, it sends a on signal to the main control module. When the main control module receives the on signal and determines that the cutting knife assembly has not cut to the bottom and that the position of the handle meets the preset conditions, it controls the motor assembly to drive the cutting knife drive component to move toward the distal end.

8. The surgical instrument according to claim 5, characterized in that The handle has an initial position and a pressing position, and a first area and a second area are formed between the initial position and the pressing position. When the handle moves from the initial position to the pressing position, it passes through the first area and the second area in sequence; when the main control module determines that the handle is located in the second area based on the handle detection signal, it further determines that the position of the handle meets the preset condition.

9. The surgical instrument according to claim 1, characterized in that The motor assembly includes a motor and a power supply, and the switch element is connected in series between the motor and the power supply. When the switch element is in the on state, the motor is connected to the power supply, and when the switch element is in the off state, the motor is disconnected from the power supply.

10. The surgical instrument according to claim 2, characterized in that The cutting knife driving member includes a rack, and the matching structure includes a pawl, and the pawl is rotatably connected to the handle; when the limiting member is in the locking position, the pawl is pressed by the blocking portion to separate the pawl from the rack, and then the handle is separated from the rack; when the limiting member is in the unlocking position, the blocking portion is separated from the pawl to release the limitation on the pawl, and in response to the actuation of the handle, the pawl cooperates with the rack to make the handle and the rack transmission connected.

11. The surgical instrument according to claim 2, characterized in that The mating structure includes a first mating component and a second mating component, the handle is operably mated with the first mating component, the second mating component is mated with the cutting knife drive, and the first mating component and the second mating component are detachably mated; when the limit member is located at the locking position, the blocking portion stops the first mating component and / or the second mating component to separate the first mating component from the second mating component, thereby separating the handle from the cutting knife drive; when the limit member is located at the unlocking position, the blocking portion releases the stop on the first mating component and / or the second mating component to connect the first mating component and the second mating component, thereby enabling the handle to engage with the cutting knife drive through the mating structure.

12. The surgical instrument according to claim 11, characterized in that The cutting knife driving member includes a toothed member; the first mating component includes a first gear and a first ratchet portion connected to the first gear, and the first gear is operably matched with the handle; the second mating component includes a second gear and a second ratchet portion connected to the second gear, and the second gear is matched with the toothed member; when the first mating component and the second mating component are connected, the first ratchet portion cooperates with the second ratchet portion, and in response to subsequent actuation of the handle, the first gear drives the second gear through the first ratchet portion and the second ratchet portion, so that the second gear drives the toothed member to move; when the first mating component and the second mating component are separated, the first ratchet portion is separated from the second ratchet portion.

13. The surgical instrument according to claim 2, characterized in that The limiting member is movably arranged on the frame, and when the limiting member is in a locked position, the blocking portion is located between the matching structure and the cutting knife driving member to stop the matching structure, so that the handle is separated from the cutting knife driving member; When the limiting member is in the unlocking position, the blocking portion is disengaged from between the matching structure and the cutting knife driving member, so that the handle can be matched with the cutting knife driving member through the matching structure.

Images