Surgical instrument

Abstract

The invention relates to the field of medical instruments, and discloses a surgical instrument which comprises an operation assembly, a sleeve assembly and a jaw assembly, the sleeve assembly is connected between the operation assembly and the jaw assembly, and the operation assembly comprises a rack; a handle; the connecting rod assembly comprises a first connecting rod and a second connecting rod; in response to actuation of the handle, the linkage assembly moves from the first position to the second position, and the jaw assembly is closed; when the connecting rod assembly is located at the second position, the first connecting rod and the second connecting rod are collinear or generally collinear, so that the connecting rod assembly is self-locked at the second position; the unlocking assembly comprises a release button, a first release part and a second release part, when the release button is operated, the first release part and the second release part are driven to rotate, and the second release part acts on the connecting rod assembly to enable the connecting rod assembly to be separated from the second position. The connecting rod assembly is locked through self-locking, no acting force exists between the connecting rod assembly and the unlocking assembly, locking is more stable, self-locking of the connecting rod assembly can be relieved only by pressing the release button, and the jaw assembly is opened.

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 to first close the jaw assembly to squeeze the patient's tissue. The cutting knife assembly can cut the tissue and simultaneously fire the staples in the staple cartridge for suturing. When the jaw assembly is closed to squeeze the tissue, the jaw assembly needs to be locked so that it cannot be opened. In the prior art, a release button is set on the frame. After the handle is pressed to close the jaws, the connecting rod connected to the handle resists the release button to lock the jaw assembly. However, during the actual operation, the medical staff will hold the handle during operation, which may cause relative movement between the connecting rod and the release button, resulting in unstable locking of the jaw assembly. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a surgical instrument that can stably lock the jaws and facilitate unlocking.

[0005] The present invention is implemented through the following technical solutions: A surgical instrument comprises: an operating assembly, a sleeve assembly and a jaw assembly, wherein the distal end of the sleeve assembly is connected to the jaw assembly, and the operating assembly comprises:

[0006] A frame; a handle rotatably connected to the frame;

[0007] A link assembly, comprising a first link and a second link, wherein the first link is connected to the proximal end of the sleeve assembly, one end of the second link is rotatably connected to the frame, and the other end is rotatably connected to the first link; in response to the actuation of the handle, the link assembly moves from a first position to a second position to drive the sleeve assembly to move, thereby driving the jaw assembly to close; when the link assembly is in the first position, the first link and the second link form an angle with each other, and when the link assembly is in the second position, the first link and the second link are collinear or substantially collinear, so that the link assembly is self-locked in the second position;

[0008] An unlocking assembly includes a release button, a first release member and a second release member, wherein the first release member is drivably connected to the release button, and the first release member is drivably connected to the second release member, and when the release button is operated, the first release member is driven to rotate, and when the first release member rotates, the second release member is driven to rotate, and the second release member acts on the connecting rod assembly to cause the connecting rod assembly to disengage from the second position and move toward the first position, thereby opening the jaw assembly.

[0009] Further, the second release member includes a rotation shaft, a first rod portion and a second rod portion, the first release member is drivably connected to the first rod portion to drive the second release member to rotate around the rotation shaft, and the second rod portion acts on the connecting rod assembly when rotating with the second release member;

[0010] The first rod portion and the second rod portion are collinear or form a certain angle with each other.

[0011] Furthermore, a side of the first rod portion away from the rotating shaft forms a connecting end, and a side of the second rod portion away from the rotating shaft forms a pushing end;

[0012] When the release button is in a released state, the second release member is in a first state, the connecting end is engaged with the first release member, and the pushing end is engaged with the connecting rod assembly;

[0013] When the release button switches from the release state to the pressing state, the first release member rotates to drive the second release member to rotate to the second state, and the pushing end rotates with the second release member to act on the connecting rod assembly.

[0014] Furthermore, the release button is rotatably arranged on the frame, and the first release member is connected to the release button. When the release button is operated, the release button and the first release member rotate along a first direction, and the first release member drives the second release member to rotate along a second direction, which is opposite to the first direction. When the second release member rotates along the second direction, it acts on the connecting rod assembly.

[0015] Furthermore, the connecting rod assembly also includes a third connecting rod and a fourth connecting rod, the third connecting rod is connected to the sleeve assembly, one end of the fourth connecting rod is rotatably connected to the frame, and the other end is rotatably connected to the third connecting rod; the first connecting rod and the second connecting rod are arranged on a first side of the frame, the third connecting rod and the fourth connecting rod are arranged on a second side of the frame, the first connecting rod is connected to the third connecting rod, or the second connecting rod is connected to the fourth connecting rod; the third connecting rod moves synchronously with the first connecting rod, and the fourth connecting rod moves synchronously with the second connecting rod.

[0016] Furthermore, the second release member also includes a third rod portion and a connecting rod, the first rod portion and the second rod portion are arranged on a first side of the frame, the third rod portion is arranged on a second side of the frame, and the connecting rod is connected between the second rod portion and the third rod portion, so that the third rod portion and the second rod portion move synchronously; in response to the second release member being driven to rotate by the first release member, one of the second rod portion and the third rod portion acts on the first connecting rod or the second connecting rod, and the other acts on the third connecting rod or the fourth connecting rod.

[0017] Further, the surgical instrument further comprises a cutting knife assembly, wherein the cutting knife assembly is partially located in the jaw assembly and is used to cut tissue when advancing the knife; the operating assembly further comprises a cutting knife driving member, wherein the cutting knife driving member is connected to the cutting knife assembly, and in response to the distal movement of the cutting knife driving member, the cutting knife assembly advances the knife to cut tissue;

[0018] The operating assembly further comprises a bracket, which is movably disposed on the frame, and in response to the distal movement of the cutting blade assembly, the bracket moves relative to the frame;

[0019] When the cutting knife driving member is in the pre-feed position, the bracket is in the open position, the bracket is separated from the release button, and the release button can be operated to drive the first release member to rotate; when the cutting knife driving member moves a preset distance to the distal end from the pre-feed position, the bracket moves to the limit position to resist the release button, thereby limiting the movement of the release button.

[0020] Further, the bracket includes a bracket body and an elastic component, the elastic component is connected between the frame and the bracket body, and the bracket body is rotatably connected to the frame;

[0021] The cutting knife driving member is provided with a first protrusion, and the bracket body is provided with a first matching member. When the cutting knife driving member is located at the pre-feed position, the first protrusion abuts against the first matching member, so that the bracket is in the open position and the elastic component is compressed; when the cutting knife driving member moves the preset distance toward the distal end, the first protrusion moves toward the distal end and disengages from the first matching member, and the elastic component is released, so that the bracket switches to the limit position.

[0022] Furthermore, the release button includes a flange, and when the bracket is located at the limit position, the bracket body abuts against the flange to limit the movement of the release button; when the bracket is located at the release position, the bracket body is separated from the flange, and the release button can be operated to drive the first release member to rotate.

[0023] Further, the sleeve assembly includes a slider and an elastic member, the first connecting rod is connected to the slider, the elastic member is connected between the slider and the frame, and when the connecting rod assembly is located at the second position, the slider is located at the distal position, and the elastic member is compressed;

[0024] The second release member acts on the connecting rod assembly to cause the connecting rod assembly to be disengaged from the second position, and the elastic member is released to cause the slider to move to the proximal position, thereby driving the connecting rod assembly to move to the first position.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the connecting rod assembly is locked by self-locking, there is no force between it and the unlocking assembly, the locking is more stable, and the self-locking of the connecting rod assembly can be released by simply pressing the release button to open the jaw assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a surgical instrument according to a specific embodiment of the present invention;

[0027] Figure 2 is a structural schematic diagram of a connecting rod assembly of a surgical instrument according to a specific embodiment of the present invention when it is in a first position;

[0028] Figure 3 is a structural schematic diagram of a connecting rod assembly of a surgical instrument according to a specific embodiment of the present invention when it is in a second position;

[0029] Figure 4 is a front view of a connecting rod assembly according to a specific embodiment of the present invention in a second position;

[0030] Figure 5 It is a structural schematic diagram of an unlocking connecting rod assembly of an unlocking assembly according to a specific embodiment of the present invention;

[0031] Figure 6 is a structural schematic diagram of a connecting rod assembly according to a specific embodiment of the present invention;

[0032] Figure 7 is a schematic structural diagram of a second release member in a specific embodiment of the present invention;

[0033] Figure 8 is a schematic structural diagram of a release button and a first release member according to a specific embodiment of the present invention;

[0034] Fig. 9 is a schematic structural diagram of a support according to a specific embodiment of the present invention;

[0035] Fig.10 is a schematic structural diagram of a driving cutting blade assembly according to a specific embodiment of the present invention;

[0036] Fig.11 yes Figure 4 Sectional view at A in the middle;

[0037] Fig.12 is a structural schematic diagram of a bracket in a specific embodiment of the present invention in a limited position;

[0038] Fig.13 yes Fig.12 Sectional view at B in the middle;

[0039] Fig.14 It is a schematic structural diagram of the connection between the cutting blade assembly and the rack according to a specific embodiment of the present invention;

[0040] Fig.15 yes Fig.14 A partial enlarged view of point C in the middle;

[0041] Fig.16 is a structural schematic diagram of a jaw assembly according to a specific embodiment of the present invention;

[0042] Fig.17 It is a cross-sectional view of a jaw assembly according to a specific embodiment of the present invention.

[0043] in:

[0044] 100, jaw assembly; 110, nail magazine seat; 112, lower slide groove; 120, nail support seat; 124, upper slide groove;

[0045] 200, sleeve assembly; 210, outer sleeve; 220, slider; 230, elastic member;

[0046] 300, operating assembly; 310, frame; 320, handle; 321, supporting member; 330, connecting rod assembly; 331, first connecting rod; 332, second connecting rod; 333, third connecting rod; 334, fourth connecting rod; 340, first hinge point; 350, gripping handle; 360, cutting knife driving member; 3600, rack; 3601, sliding groove; 361, first protrusion; 370, bracket; 371, bracket body; 372, first matching member;

[0047] 400, unlocking assembly; 410, release button; 411, extension; 420, first release member; 430, second release member; 431, rotation axis; 432, first rod; 4321, connecting end; 433, second rod; 4331, pushing end; 434, connecting rod; 435, third rod;

[0048] 500, cutting knife assembly; 510, cutting knife; 520, spindle; 530, knife head; 531, knife body; 532, upper beam; 533, lower beam. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] 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.

[0052] A specific embodiment of the present invention discloses a surgical instrument, such as Figure 1 As shown, the stapler may include an operating assembly 300, a sleeve assembly 200 and a jaw assembly 100. The sleeve assembly 200 is connected between the operating assembly 300 and the jaw assembly 100. The jaw assembly 100 has an open state and a closed state, and clamps the patient's tissue in the closed state. Medical staff can control the opening and closing of the jaw assembly 100 through the operating assembly 300.

[0053] like Figure 2 As shown, the operating assembly 300 includes: a frame 310, a handle 320, a connecting rod assembly 330 and an unlocking assembly 400, wherein the handle 320 is rotatably connected to the frame 310, and a spring (not shown in the figure) is arranged between the handle 320 and the frame 310, and the handle 320 has an initial position and a pressing position, and the medical staff can operate the handle 320 to rotate the handle 320 relative to the frame 310, and the handle 320 moves to the pressing position when it is actuated, and moves to the initial position when the handle 320 is released. The connecting rod assembly 330 includes a first connecting rod 331 and a second connecting rod 332, the first connecting rod 331 is connected to the sleeve assembly 200, and one end of the second connecting rod 332 is rotatably connected to the frame 310, and the other end is rotatably connected to the first connecting rod 331. In response to the actuation of the handle 320, the link assembly 330 moves from the first position to the second position to drive the sleeve assembly 200 to move, and the sleeve assembly 200 drives the jaw assembly 100 to close when it moves; wherein when the link assembly 330 is in the first position, as shown in FIG. Figure 2 As shown, the first connecting rod 331 and the second connecting rod 332 form a certain angle with each other; when the connecting rod assembly 330 is in the second position, as shown in FIG. Figure 3 As shown, the first connecting rod 331 and the second connecting rod 332 are colinear or substantially colinear, so that the connecting rod assembly 330 is self-locked in the second position; the unlocking assembly 400 is used to release the self-locking of the connecting rod assembly 330, so that the jaw assembly 100 switches from a closed state to an open state.

[0054] Collinearity means that the first link 331 and the second link 332 are located on the same straight line, and the angle between them is 180°. Substantially collinearity means that the first link 331 and the second link 332 pass the dead point position, and the angle between the first link 331 and the second link 332 is greater than 0° and less than 5°. When the link assembly 330 is located at the dead point (corresponding to collinearity) or substantially located at the dead point (corresponding to substantially collinearity), the pressure angle between the first link 331 and the second link 332 is substantially equal to 90°. When the first link 331 or the second link 332 is subjected to an external force from the sleeve assembly 200, the torque on the other link is zero, so that the link assembly 330 cannot move, and the link assembly 330 is self-locked in the second position, so that the jaw assembly 100 is locked in the closed position.

[0055] like Figures 1 to 3 As shown, the unlocking assembly 400 includes a release button 410, a first release member 420 and a second release member 430. The release button 410 is arranged outside the housing of the operating assembly 300 for operation by medical personnel. The first release member 420 is drivably connected to the release button 410. The first release member 420 is connected to the second release member 430. When the release button 410 is operated, the first release member 420 is driven to rotate. When the first release member 420 rotates, the second release member 430 is driven to rotate. When the second release member 430 rotates, it acts on the connecting rod assembly 330, so that the connecting rod assembly 330 is separated from the second position and moves to the first position, thereby opening the jaw assembly 100. The unlocking assembly 400 acts on the connecting rod assembly 330 through the second release member 430, releases the self-locking between the first connecting rod 331 and the second connecting rod 332, so that the first connecting rod 331 and the second connecting rod 332 are no longer in the dead point position, thereby causing the connecting rod assembly 330 to move back to the first position, thereby switching the jaw assembly 100 to the open state.

[0056] like Figure 3As shown, the second release member 430 includes a rotation shaft 431, a first rod portion 432 and a second rod portion 433. The second release member 430 is connected to the frame 310 through the rotation shaft 431. The first rod portion 432 and the second rod portion 433 are both connected to the rotation shaft 431. The first release member 420 is drivably connected to the first rod portion 432. When the first release member 420 is driven by the release button 410 to rotate, it drives the second release member 430 to rotate around the rotation shaft 431. When the second rod portion 433 rotates with the second release member 430, it acts on the connecting rod assembly 330 to make the connecting rod assembly 330 disengage from the second position. The first rod portion 432 and the second rod portion 433 extend in different directions. The first rod portion 432 and the second rod portion 433 are collinear or at a certain angle to each other. In one embodiment, the first rod portion 432 and the second rod portion 433 are collinear. The second release member 430 is generally rod-shaped. In a preferred embodiment, the first rod portion 432 and the second rod portion 433 form a certain angle with each other, and the second release member 430 is substantially V-shaped.

[0057] Combination Figure 3 and Figure 4 The first rod portion 432 forms a connecting end 4321 on a side away from the rotating shaft 431, and the second rod portion 433 forms a pushing end 4331 on a side away from the rotating shaft 431. Specifically, the first release member 420 is drivably connected to the connecting end 4321, and the second rod portion 433 acts on the connecting rod assembly 330 through the pushing end 4331.

[0058] like Figure 4 As shown, when the release button 410 is in the released state, the first release member 420 is not driven, the second release rod 430 is in the first state, the connecting end 4321 is engaged with the first release rod 420, and the pushing end 4313 is engaged with the connecting rod assembly 330. When the pushing end 4313 is engaged with the connecting rod assembly 330, it only contacts the connecting rod assembly 330, and does not apply a force to the connecting rod assembly 330, and the connecting rod assembly 330 is kept in the second position; when the pushing end 4331 rotates with the second release rod 430, it contacts the connecting rod assembly 330 and applies a force to the connecting rod assembly 330. The connecting rod assembly 330 is locked by itself, and there is no force between it and the second release member 430, and the locking is stable. Figure 5 As shown, when the release button 410 switches from the release state to the pressing state, the first release member 420 rotates, connects with the connecting end 4312 and drives the connecting end 4312 to rotate, thereby driving the second release member 430 to rotate, so that the second release member 430 rotates to the second state. During the process of the second release member 430 switching from the first state to the second state, the rotation of the pushing end 4313 around the rotating shaft 431 acts on the connecting rod assembly 330, destroying the self-locking of the connecting rod assembly 330 and causing the connecting rod assembly 330 to disengage from the second position.

[0059] The first connecting rod 331 and the second connecting rod 332 are connected to the first hinge point 340. When the release button 410 is operated, the first release member 420 rotates to drive the second release member 430 to rotate. Preferably, the second release member 430 acts on the first hinge point 340, and the first hinge point 340 is located at the connection between the first connecting rod 331 and the second connecting rod 332. Applying force to the first hinge point 340 can better destroy the self-locking of the connecting rod assembly 330. The second release member 430 can also act on the first connecting rod 331 or the second connecting rod 332 to release the self-locking of the connecting rod assembly 330.

[0060] When the connecting rod assembly 330 is in the second position and the second release member 431 is in the first state, the push end 4313 contacts or corresponds to the first hinge point 340. Contact means that the push end 4313 touches the first hinge point 340 but does not apply a force to the first hinge point 340; correspondence means that the push end 4313 is separated from the first hinge point 340, the push end 4313 is located on one side of the first hinge point 340, and when the second release member 431 rotates, the push end 4313 rotates to abut against the first hinge point 340, and applies a force to the first hinge point 340, so that the connecting rod assembly 330 is separated from the second position.

[0061] The release button 410 is rotatably disposed on the frame 310, and the first release member 420 is drivably connected to the second release member 431. When the release button 410 is operated, the release button 410 and the first release member 420 rotate along a first direction, and the rotation of the first release member 420 along the first direction drives the second release member 431 to rotate along a second direction, and the second direction is opposite to the first direction. Figure 4 As shown in , the first direction is the clockwise direction, and the second direction is the counterclockwise direction. When the second release member 430 rotates along the second direction, it acts on the connecting rod assembly 330 through the pushing end 4313. Specifically, in this embodiment, the side of the first release member 420 close to the second release member 430 is lower than the connecting end 4321, and the first release member 420 supports the connecting end 4321 or is separated from the connecting end 4321. When the first release member 420 rotates with the release button 410, the first release member 420 supports the connecting end 4321 and pushes the connecting end 4321, so that the first release member 420 rotates.

[0062] In this embodiment, the height of the first hinge point 340 when it is in the second position is higher than that when it is in the first position. That is, when the connecting rod assembly 330 moves from the first position to the second position, the first hinge point 340 moves upward; when the connecting rod assembly 330 moves from the second position to the first position, the first hinge point 340 moves downward. The second release member 431 is disposed above the connecting rod assembly 330. When the second release member 431 rotates in the second direction (counterclockwise) to the second state, the push end 4313 rotates downward, and can apply a downward force to the first hinge point 340, so that the connecting rod assembly 330 is disengaged from the second position and biased toward the direction of the first position.

[0063] like Figure 1 As shown, the operating assembly 300 further includes a gripping handle 350, which is used for the medical staff to grip in order to operate the handle 320, and the release button 410 is approximately located above the gripping handle 350. When the medical staff grips the gripping handle 350, they can operate the release button 410 with their thumb, specifically by pushing the release button 410 forward to rotate it. The setting position and operation mode of the release button 410 conform to the human operating habits, so that the medical staff may use it more easily.

[0064] In another embodiment, if Figure 6 and Figure 7 As shown, the connecting rod assembly 330 further includes a third connecting rod 333 and a fourth connecting rod 334, wherein the third connecting rod 333 is rotatably connected to the sleeve assembly 200, and one end of the fourth connecting rod 334 is rotatably connected to the frame 310, and the other end is rotatably connected to the third connecting rod 333. The first connecting rod 331 and the second connecting rod 332 are arranged on a first side of the frame 310, and the third connecting rod 333 and the fourth connecting rod 334 are arranged on a second side of the frame 310. Specifically, the third connecting rod 333 and the first connecting rod 331 are symmetrically arranged on both sides of the frame 310, and the fourth connecting rod 334 and the second connecting rod 332 are symmetrically arranged on both sides of the frame 310. The first connecting rod 331 is connected to the third connecting rod 333, or the second connecting rod 332 is connected to the fourth connecting rod 334, so that the third connecting rod 333 moves synchronously with the first connecting rod 331, and the fourth connecting rod 334 moves synchronously with the second connecting rod 332. When the connecting rod assembly 330 is in the first position, the first connecting rod 331 and the second connecting rod 332 form an angle with each other, and the third connecting rod 333 and the fourth connecting rod 334 form an angle with each other; when the connecting rod assembly 330 is in the second position, the first connecting rod 331 and the second connecting rod 332 are collinear or substantially collinear, and the third connecting rod 333 and the fourth connecting rod 334 are collinear or substantially collinear, and the connecting rod assembly 330 is self-locked in the second position. The connecting rod assembly 330 improves the stability of the movement of the connecting rod assembly 330 and the stability of the locking jaw assembly 100 by arranging connecting rods on both sides of the frame 310. The closing of the jaw assembly 100 and the compression of the jaw assembly 100 on the tissue are made more stable.

[0065] The second release member 430 also includes a third rod portion 435 and a connecting rod 434. The first rod portion 432 and the second rod portion 433 are arranged on the first side of the frame 310, and the third rod portion 435 is arranged on the second side of the frame 310. The connecting rod 434 is connected between the second rod portion 433 and the third rod portion 435, so that the second rod portion 433 and the third rod portion 435 move synchronously. When the connecting rod assembly 330 is in the second position, the first connecting rod 331 and the second connecting rod 332 are colinear or substantially colinear, and the third connecting rod 333 and the fourth connecting rod 334 are colinear or substantially colinear, the second release member 430 is driven to rotate by the first release member 420, and in the process of moving from the first state to the second state, the second rod portion 433 acts on the first connecting rod 331 and the second connecting rod 332, and the third rod portion 435 acts on the third connecting rod 333 and the fourth connecting rod 334, and at the same time, the self-locking of the first connecting rod 331 and the second connecting rod 332 and the self-locking of the third connecting rod 333 and the fourth connecting rod 334 are released, so that the connecting rod assembly 330 is disengaged from the second position.

[0066] It is worth noting that the rotation of the second release member 430 can only make the connecting rod assembly 330 disengage from the second position, but is not sufficient to move the connecting rod assembly 330 to the first position. In this embodiment, after the connecting rod assembly 330 disengages from the second position, it can automatically move to the first position to open the jaw assembly 100, which is specifically achieved through the following structure:

[0067] like Figure 4 and Figure 5 As shown, the sleeve assembly 200 includes a slider 220, an elastic member 230 and an outer sleeve 210. The outer sleeve 210 is connected to the jaw assembly 100. When the outer sleeve 210 is located in the distal position, the jaw assembly 100 is in a closed state; when the outer sleeve 210 is located in the proximal position, the jaw assembly 100 is in an open state; the slider 220 is connected to the outer sleeve 210, and the first connecting rod 331 is rotatably connected to the slider 220, and the elastic member 230 is connected between the slider and the frame 310. When the connecting rod assembly 330 is in the first position, the outer sleeve 210 is in the proximal position, and the elastic member 230 is in the initial state; when the connecting rod assembly 330 moves from the first position to the second position, the distal end of the first connecting rod 331 moves distally, and the first connecting rod 331 drives the outer sleeve 210 to move distally through the slider 220, so that the outer sleeve 210 moves to the distal position, the jaw assembly 100 is in a closed state, the elastic member 230 is compressed, and the connecting rod assembly 330 self-locks in the second position, so that the elastic member 230 is in a compressed state.

[0068] After the second release member 430 rotates to act on the connecting rod assembly 330 and causes the connecting rod assembly 330 to disengage from the second position, the connecting rod assembly 330 is no longer self-locking, the elastic member 230 is released, and the elastic force of the elastic member 230 causes the slider 220 and the outer sleeve 210 to move toward the proximal end. The slider 220 pushes the first connecting rod 331 to cause the connecting rod assembly 330 to move to the first position, and the jaw assembly 100 is opened.

[0069] Furthermore, the surgical instrument also includes a cutting knife assembly (not shown in the figure), part of which is located in the jaw assembly 100 and is used to cut tissue during cutting, which is the process of the cutting knife assembly moving toward the distal end. Figure 2 As shown, the operating assembly 300 further includes a cutting knife driving member 360, which is connected to the cutting knife assembly. In response to the distal movement of the cutting knife assembly, the cutting knife assembly advances to cut tissue.

[0070] Among them Fig.16 and Fig.17 As shown, the jaw assembly 100 includes a nail magazine seat 110 and a nail support seat 120 hingedly connected to the nail magazine seat 110, a nail magazine is installed in the nail magazine seat 110, and the cutting knife assembly 500 includes a cutter head 530 located in the jaw assembly 100, the cutter head 530 is arranged in an "I" shape, the cutter head 530 includes a blade body 531, an upper beam 532 and a lower beam 533, a nail magazine is provided in the nail magazine seat 110, the nail magazine seat 110 is provided with a lower slide groove 112, the nail support seat 120 is provided with an upper slide groove 124, the lower beam 533 of the cutter head 530 is placed in the lower slide groove 112, the blade body 531 is located in the nail magazine, and when the jaw assembly 100 is in a closed state, the upper slide groove 124 is substantially parallel to the lower slide groove 112. When the jaw assembly 100 is switched to the closed state, the cutter head 530 is located at the proximal end of the nail magazine, the lower beam 533 of the cutter head 530 is located in the lower slide groove 112, and the upper beam 532 does not enter the upper slide groove 124. When the cutter is advanced, the cutting knife assembly 300 moves distally, and the upper beam 532 of the cutter head 530 enters the upper slide groove 124, and cooperates with the upper slide groove 124 and the lower slide groove 112 at the same time. The cutter head 530 of the cutting knife is limited by the upper slide groove 124 and the lower slide groove 112 to ensure that the position of the cutter head 530 is stable and will not deviate when the cutter is advanced. When the cutter head 530 moves to the distal end of the nail magazine, the upper beam 532 of the cutter head 530 is still located in the upper slide groove 124.

[0071] During the cutting process, when the knife head 530 cooperates with the upper slide groove 124 and the lower slide groove 112 at the same time, if the medical staff operates the jaw opening assembly to switch the jaw assembly 100 to the open state, the connecting rod assembly 330 is no longer self-locked in the second position, and moves to the first position under the action of the elastic member 230, so that the sleeve assembly 200 has a force to move proximally, and then the nail seat 120 has a force to rotate toward the open state of the jaw assembly 100. Since the nail seat 120 cooperates with the knife head 530 through the upper slide groove 124 and the upper beam 532, it cannot be rotated to open the jaw assembly 100, but it will pull the knife head 530 upward, so that the knife head 530 is pulled upward, and the knife head 530 is tightened in the vertical direction, and its friction in the cutting direction (horizontal direction) becomes larger, so that the knife head 530 cannot move in the jaw assembly 100, and the cutting cannot be carried out normally. Therefore, during the cutting process, the cutter head 530 cooperates with the upper slide groove 124 and the lower slide groove 112 at the same time, and the unlocking component 400 is operated, which will make it impossible to cut or retract normally.

[0072] like Figure 2 and Figure 4 As shown, the operating assembly 300 further includes a bracket 370, which is movably disposed on the frame 310. In response to the distal movement of the cutting blade assembly, the bracket 370 moves relative to the frame 310. Figures 8 to 12 As shown, when the cutting knife driving member 360 is located at the pre-feeding position, the bracket 370 is in the open position, the bracket 370 is separated from the release button 410, and the release button 410 can be operated to drive the first release member 420 to rotate. In the pre-feeding position, the cutting knife driving member 360 is not driven and is located at the initial position. When the cutting knife driving member 360 moves a preset distance to the distal end, the bracket 370 switches to the limit position, abuts against the release button 410, and limits the movement of the release button 410. When the stapler is in use, the medical staff line closes the jaw assembly 100 by actuating the handle 320 to clamp the human tissue stably, and then drives the cutting knife driving member 360 to move and start the feeding. During the feeding process, if the jaw assembly 100 is opened due to misoperation by the medical staff, the cutting knife assembly will be unable to move.

[0073] Due to the setting of the bracket 370, during the cutting process, after the cutting knife driving member 360 moves to the far end by a preset distance, the bracket 370 is located at the limit position, abutting against the release button 410. Even if the medical staff accidentally touches the release button 410, the release button 410 cannot drive the first release member 420 to rotate and open the jaw assembly 100, thereby ensuring that the jaw assembly 100 will not be opened due to misoperation during the cutting process. The cutting knife driving member 360 is in the pre-cutting position, and when the cutting process has not started, the bracket 370 is in the opening position, and the medical staff can open the jaw assembly 100 by operating the release button 410.

[0074] The cutting knife drive 360 ​​is driven by a motor assembly (not shown) and / or driven by a handle 320. The cutting knife drive 360 ​​is a rack 3600. In the embodiment driven by the motor assembly, the motor assembly is connected to a gear assembly, and the gear assembly is engaged with the rack 3600 so that the motor assembly can drive the rack to move to the distal end or the proximal end. In the embodiment driven by the handle 320, the handle 320 is connected with a ratchet or a gear matched with the rack 3600 so that the handle 320 can drive the rack 3600 to move to the distal end when actuated, thereby feeding. In the embodiment driven by the motor assembly and the handle 320 together, the motor assembly is connected to the rack 3600 by the gear assembly, and the handle 320 is connected to the rack 3600 by a ratchet or a gear, and the motor assembly and the handle 320 can both drive the rack 3600 to move to the distal end to realize feeding.

[0075] The bracket 370 includes a bracket body 371 and an elastic component (not shown in the figure). The elastic component is connected between the frame 310 and the bracket body 371. The bracket body 371 is rotatably connected to the frame 310. The bracket body 371 is rotated to switch the bracket 370 between the open position and the limited position. The elastic component is specifically a torsion spring, which can provide a force to rotate the bracket body 371. The cutting knife driving member 360 is provided with a first protrusion 361, and the bracket body 371 is provided with a first matching member 372. When the cutting knife driving member 360 is located at the pre-feeding position, the first protrusion 361 abuts against the first matching member 372, so that the bracket 370 is in the open position, the elastic component is compressed, the bracket body 371 is separated from the release button 410, and the medical staff can operate the release button 410; when the cutting knife driving member 360 moves to the far end by a preset distance, the first protrusion 361 moves to the far end and separates from the bracket body 371. In this process, the torsion spring is gradually released, and the force of the torsion spring causes the bracket body 371 to rotate until the first protrusion 361 is separated from the first matching member 372, and the bracket body 371 rotates until the bracket 370 is located at the limit position, limiting the movement of the release button 410. After the feeding process begins, the bracket 370 limits the release button 410 to prevent the medical staff from misoperating and causing the jaw assembly 100 to open.

[0076] The release button 410 includes a flange 411, which is extended from the release button 410. When the bracket 370 is located at the limiting position, the bracket body 371 abuts against the flange 411 to limit the rotation of the release button 410. When the bracket 370 is located at the opening position, the bracket body 371 is separated from the flange 411, and the release button 410 can be operated to drive the first release member 420 to rotate, thereby opening the jaw assembly 100. In this embodiment, the flange 411 is arranged on the upper side of the release button 410, and the bracket body 371 is located on the lower side of the release button 410. When the release button 410 is operated and rotated clockwise, the flange 411 rotates downward, and the bracket body 371 abuts against the flange 411 so that the flange 411 and the release button 410 cannot rotate.

[0077] The rack 310 is provided with a main control module, an encoder and a zero position switch. The encoder and the zero position switch are electrically connected to the main control module. The zero position switch is located above the bracket body 371. When the bracket body 371 is in the open position, the zero position switch is not triggered. The cooperation between the first protrusion 361 and the first matching piece 372 enables the bracket body 371 to switch to the limit position after the rack 3600 moves to the far end for a preset distance. When the bracket body 371 rotates to the limit position, the bracket body 371 abuts against and triggers the zero position switch. After the zero position switch is triggered, a trigger signal is sent to the main control module. After receiving the trigger signal, the main control module controls the encoder to start recording the feed distance of the cutting knife assembly 500 (the movement distance of the rack 3600). Such a setting enables the encoder to more accurately record the feed distance of the cutting knife assembly 500, as follows:

[0078] During the movement of the rack 3600, the encoder starts to record the distance moved by the rack 3600 after the rack 3600 moves a preset distance from the pre-feed position, such as Fig.14 and Fig.15As shown, the cutting knife assembly 500 includes a cutting knife 510 and a core shaft 520, and the core shaft 520 is connected to the rack 3600. In this embodiment, the rack 3600 is provided with a sliding groove 3601, and the core shaft 520 is movably arranged in the sliding groove 3601. When the rack 3600 is located in the pre-feed position, the core shaft 520 is located on the distal side of the sliding groove 3601. When the rack 3600 moves toward the distal end, it drives the sliding groove 3601 to move toward the distal end. The rack 3600 moves a preset distance until the proximal end of the sliding groove 3601 abuts against the core shaft 520, and then the core shaft 520 can be pushed to move toward the distal end. It can be seen that during the process of the rack 3600 moving to the far end to drive the cutting blade assembly 500 to advance, there is a part of the empty stroke, that is, during the process of moving the preset distance from the pre-advance position, the cutting blade assembly 500 cannot be driven to move, so this part of the stroke should not be recorded as the cutting blade assembly 500 advance distance, that is, the rack 3600 needs to move to the far end for the preset distance before the bracket body 371 switches to the limit position to trigger the zero switch. In this embodiment, the preset distance is less than or equal to 6mm.

[0079] It should also be noted that the switching of the connecting rod assembly 330 from the first position to the second position is achieved by actuating the handle 320. Figure 2 and Figure 3 As shown, the handle 320 is provided with a supporting member 321. When the connecting rod assembly 330 is in the first position, the supporting member 321 is supported by the first connecting rod 331 or the second connecting rod 332. When the handle 320 is actuated, the supporting member 321 rotates to drive the connecting rod assembly 330 to move. When the handle 320 is actuated to the limit, the first connecting rod 331 and the second connecting rod 332 are collinear or substantially collinear, and self-locking is achieved. At this time, the handle 320 does not apply an action force to the first connecting rod 331 or the second connecting rod 332. When the handle 320 is subsequently operated, the handle 320 does not contact the connecting rod assembly 330, or contacts but does not apply an action force, and the actuation of the handle 320 does not affect the stability of the self-locking of the connecting rod assembly 330. At the same time, the handle 320 is separated from the unlocking assembly 400, and the operation of the handle 320 by the medical staff will not cause the unlocking assembly 400 to move, thereby ensuring the stability of the squeezing.

[0080] Further, the operating assembly 300 in this embodiment is only provided with a handle 320, and the handle 320 can be operated for the first actuation and subsequent actuation, and the subsequent actuation is any actuation after the first actuation. When the jaw assembly 100 is in an open state, in response to the first actuation of the handle 320, the connecting rod assembly 330 switches from the first position to the second position; in response to the subsequent actuation of the handle 320, the cutting knife driving member 360 moves distally, thereby driving the cutting knife assembly to advance. The operating assembly 300 includes a handle position detection device. During the subsequent actuation, the handle 320 actuates to a certain angle, and the main control module starts the motor assembly to drive the cutting knife driving member 360 to move distally. At the same time, the subsequent braking of the handle 320 can drive the cutting knife driving member 360 through the ratchet, thereby increasing the cutting knife assembly's advance force, so that the cutting knife assembly can smoothly cut when encountering thicker tissue. For specific solutions, please refer to the applicant's prior application CN2023103995400.

[0081] The surgical instrument in this embodiment realizes locking of the jaw assembly 100 through the self-locking of the connecting rod assembly 330, and the unlocking assembly 400 is used to release the self-locking of the connecting rod assembly 330 to open the jaws, so that the locking of the jaw assembly 100 is more stable; and the setting of the bracket 370 can prevent the jaw assembly 100 from opening after the feeding starts, thereby avoiding the situation where the cutting knife assembly 500 cannot feed normally.

[0082] After the firing is completed, the rack 3600 moves proximally back to the pre-feed position, so that the bracket 370 switches to the open position, the bracket 370 is separated from the release button 410, and the release button 410 is unlocked. The medical staff can operate the release button 410 to drive the first release member 420 to rotate, and then drive the second release member 430 to rotate to release the self-locking of the connecting rod assembly 330, open the jaw assembly 100, and then remove the jaw assembly 100 from the patient's body. It should be understood that although this specification is described in accordance with the implementation mode, 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 can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0083] 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 sleeve assembly and a jaw assembly, wherein the distal end of the sleeve assembly is connected to the jaw assembly, and the operating assembly comprises: frame; A handle rotatably connected to the frame; A link assembly, comprising a first link and a second link, wherein the first link is connected to the proximal end of the sleeve assembly, one end of the second link is rotatably connected to the frame, and the other end is rotatably connected to the first link; in response to the actuation of the handle, the link assembly moves from a first position to a second position to drive the sleeve assembly to move, thereby driving the jaw assembly to close; when the link assembly is in the first position, the first link and the second link form an angle with each other, and when the link assembly is in the second position, the first link and the second link are collinear or substantially collinear, so that the link assembly is self-locked in the second position; An unlocking assembly includes a release button, a first release member and a second release member, wherein the first release member is drivably connected to the release button, and the first release member is drivably connected to the second release member, and when the release button is operated, the first release member is driven to rotate, and when the first release member rotates, the second release member is driven to rotate, and the second release member acts on the connecting rod assembly to cause the connecting rod assembly to disengage from the second position and move toward the first position, thereby opening the jaw assembly.

2. The surgical instrument according to claim 1, characterized in that The second release member includes a rotation shaft, a first rod portion and a second rod portion, and the first release member is drivably connected to the first rod portion; the first release member rotates to drive the first rod portion to rotate around the rotation shaft, and the second rod portion acts on the connecting rod assembly when it is driven by the first rod portion to rotate; The first rod portion and the second rod portion are collinear or form a certain angle with each other.

3. The surgical instrument according to claim 2, characterized in that The side of the first rod away from the rotating shaft forms a connecting end, and the side of the second rod away from the rotating shaft forms a pushing end; the release button has a release state and a pressed state; When the release button is in a released state, the connecting end is engaged with the first release member, and the pushing end is engaged with the connecting rod assembly; When the release button switches from the release state to the pressing state, the first release member rotates to drive the second release member to rotate, and the pushing end rotates with the second release member to act on the connecting rod assembly.

4. The surgical instrument according to claim 1, characterized in that The release button is rotatably arranged on the frame, and the first release member is connected to the release button. When the release button is operated, the release button and the first release member rotate along a first direction, and the first release member drives the second release member to rotate along a second direction, which is opposite to the first direction. When the second release member rotates along the second direction, it acts on the connecting rod assembly.

5. The surgical instrument according to claim 2, characterized in that: The connecting rod assembly also includes a third connecting rod and a fourth connecting rod, the third connecting rod is connected to the sleeve assembly, one end of the fourth connecting rod is rotatably connected to the frame, and the other end is rotatably connected to the third connecting rod; the first connecting rod and the second connecting rod are arranged on a first side of the frame, and the third connecting rod and the fourth connecting rod are arranged on a second side of the frame; the first connecting rod is connected to the third connecting rod, and / or the second connecting rod is connected to the fourth connecting rod; the third connecting rod moves synchronously with the first connecting rod, and the fourth connecting rod moves synchronously with the second connecting rod.

6. The surgical instrument according to claim 5, characterized in that The second release member also includes a third rod portion and a connecting rod, the first rod portion and the second rod portion are arranged on a first side of the frame, the third rod portion is arranged on a second side of the frame, and the connecting rod is connected between the second rod portion and the third rod portion, so that the third rod portion and the second rod portion move synchronously; in response to the second release member being driven to rotate by the first release member, one of the second rod portion and the third rod portion acts on the first connecting rod or the second connecting rod, and the other acts on the third connecting rod or the fourth connecting rod.

7. The surgical instrument according to claim 1, characterized in that The surgical instrument further comprises a cutting knife assembly; the operating assembly further comprises a cutting knife driving member, the cutting knife driving member is connected to the cutting knife assembly, and in response to the distal movement of the cutting knife driving member, the cutting knife assembly advances to cut tissue; The operating assembly further comprises a bracket, which is movably disposed on the frame, and in response to the distal movement of the cutting blade assembly, the bracket moves relative to the frame; When the cutting knife driving member is in the pre-feed position, the bracket is in the open position, the bracket is separated from the release button, and the release button is operated to drive the first release member to rotate; when the cutting knife driving member moves a preset distance to the distal end from the pre-feed position, the bracket moves to the limit position to resist the release button, thereby limiting the movement of the release button.

8. The surgical instrument according to claim 7, characterized in that The bracket includes a bracket body and an elastic component, the elastic component is connected between the frame and the bracket body, and the bracket body is rotatably connected to the frame; The cutting knife driving member is provided with a first protrusion, and the bracket body is provided with a first matching member. When the cutting knife driving member is located at the pre-feed position, the first protrusion abuts against the first matching member, so that the bracket is in the open position and the elastic component is compressed; when the cutting knife driving member moves the preset distance toward the distal end, the first protrusion moves toward the distal end and disengages from the first matching member, and the elastic component is released, so that the bracket switches to the limit position.

9. The surgical instrument according to claim 8, characterized in that The release button includes a flange, and when the bracket is located at the limiting position, the bracket body abuts against the flange to limit the movement of the release button; when the bracket is located at the release position, the bracket body is separated from the flange, and the release button is operated to drive the first release member to rotate.

10. The surgical instrument according to claim 1, characterized in that The sleeve assembly includes a slider and an elastic member, the first connecting rod is connected to the slider, the elastic member is connected between the slider and the frame, and when the connecting rod assembly is located at the second position, the slider is located at the distal position, and the elastic member is compressed; The second release member acts on the connecting rod assembly to cause the connecting rod assembly to be disengaged from the second position, and the elastic member is released to cause the slider to move to the proximal position, thereby driving the connecting rod assembly to move to the first position.

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