clamping pliers

Abstract

This invention discloses a clamping forceps, including a clamping chamber, a jaw assembly, a clamp delivery drive mechanism, a retraction stop mechanism, and an actuator. The clamping chamber includes clamps. The clamp delivery drive mechanism includes a first drive member and a clamp delivery rod. The actuator can drive the first drive member to move so that the clamp delivery rod pushes the clamp into the jaw assembly. The retraction stop mechanism includes a guide pivot member, which has a first retraction stop portion, a second retraction stop portion, and a third retraction stop portion. The actuator has an open position, a middle position, and a closed position. When the actuator is in the middle position, the clamp is in a ready position. Before the actuator moves from the open position to the closed position, the first, second, and third retraction stop portions can sequentially prevent the first drive member from retracting, thereby avoiding clamp delivery failures and preventing the clamp located in the jaw assembly from retracting and causing problems with clamping blood vessels or tissues, ensuring smooth clamping, and improving the reliability and safety of the surgery.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a clamping forceps. Background Technology

[0002] In surgical procedures, clips are frequently used to clamp blood vessels or tissues to reduce bleeding. Closing blood vessels or tissues with clips is a simple and quick method, leading to a dramatic increase in their use in surgery. A clip applicator is a device used to apply these clips to blood vessels or tissues.

[0003] Traditional clamping forceps can only be used once. After a clamp is installed externally, the jaws of the clamping forceps are inserted into the body to apply the clamp. Repeating the installation of a single clamp is inconvenient. In recent years, continuous clamping forceps that can apply multiple clamps continuously have become a trend.

[0004] A continuous clipping clamp contains multiple clips, which are applied sequentially to blood vessels or tissues during use. Specifically, the continuous clipping clamp includes a clip delivery component capable of sequentially pushing the multiple clips into the jaw assembly. Existing continuous clipping clamps are prone to clip delivery failures when pushing the clips into the jaw assembly. For example, if the clip delivery component resets before the previous clip is fully inserted into the jaw assembly, subsequent pushes will move the next clip instead of continuing to push the previously incompletely inserted clip, thus causing a clip delivery failure.

[0005] Based on the above, it is necessary to improve the clamping clamp in the existing technology. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a clamping clamp that solves the technical problem that the clamping clamp is prone to premature reset of the clamping rod, which leads to clamping failure.

[0007] This invention is achieved through the following technical solution:

[0008] A clamping pliers includes a clamping chamber, a jaw assembly, a clamping drive mechanism, a locking mechanism, and an actuator; the clamping chamber includes clamps; the clamping drive mechanism includes a first drive member and a clamping rod, the actuator driving the first drive member to move such that the clamping rod pushes the clamps from the clamping chamber into the jaw assembly; the locking mechanism includes a guide pivot member having a first locking portion, a second locking portion, and a third locking portion, the second locking portion being located between the first locking portion and the third locking portion;

[0009] The actuator has an open position, a middle position, and a closed position. When the actuator is in the middle position, the clamp is in the ready position.

[0010] In response to the actuator moving from the open position to the intermediate position, the first stop and the second stop are sequentially located at the proximal end of the first drive member to prevent the first drive member from moving backward;

[0011] In response to the actuator moving from the intermediate position to the closed position, the third stop portion is located at the proximal end of the first drive member and remains in contact with the first drive member to prevent the first drive member from retracting.

[0012] When the actuator is in the closed position, the first drive member separates from the third stop part.

[0013] Furthermore, the first driving member has an initial position, a first position, a second position, and a third position; when the actuator is in the open position, the first driving member is in the initial position, and when the actuator is in the intermediate position, the first driving member is in the third position.

[0014] When the first driving member moves from the initial position to the first position, the first stop portion is located at the proximal end of the first driving member;

[0015] Before the first driving member moves from the first position to the second position, the first driving member is located between the first stop portion and the second stop portion;

[0016] When the first driving member moves from the first position to the second position, the second stop portion is located at the proximal end of the first driving member;

[0017] Before the first driving member moves from the second position to the third position, the first driving member is located between the second stop portion and the third stop portion;

[0018] When the first driving member moves from the second position to the third position, the third stop portion is located at the proximal end of the first driving member.

[0019] Furthermore, the jaw assembly defines a first longitudinal axis; the clamping chamber includes at least two clamps, which are stacked along a preset direction at an angle to the first longitudinal axis, wherein the clamp aligned with the jaw assembly along the first longitudinal axis is the first clamp.

[0020] Furthermore, before the first drive member drives the clamping rod to move the first clamp to the point of complete exit from the clamping chamber, the first drive member is positioned between the first stop part and the second stop part to prevent the first drive member from retracting.

[0021] Furthermore, the second stop portion is located on the far side of the first stop portion, the proximal end of the first stop portion has a first guide surface, the distal end of the first stop portion has a first stop surface, the first drive member can move from the first guide surface to between the first stop portion and the second stop portion, and the first stop surface abuts against the first drive member when the first drive member retracts to prevent it from retracting.

[0022] Furthermore, after the first driving member drives the clamping rod to push the first clamp to move to the fully exited clamping chamber and before reaching the ready position, the first driving member is located between the second stop part and the third stop part to prevent the first driving member from retracting.

[0023] Furthermore, the third stop portion is located on the far side of the second stop portion, the proximal end of the second stop portion has a second guide surface, the distal end of the second stop portion has a second stop surface, the first drive member can move from the second guide surface to between the second stop portion and the third stop portion, and the second stop surface abuts against the first drive member when the first drive member retracts to prevent it from retracting.

[0024] Furthermore, when the first driving member drives the feeding rod to push the first clamp to the ready position, the first driving member moves to the distal end of the third stop portion and abuts against the distal end of the third stop portion to prevent the first driving member from retracting.

[0025] Furthermore, the proximal end of the third stop portion has a third guide surface, and the distal end of the third stop portion has a third stop surface. The first driving member can move from the third guide surface to the distal end of the third stop portion, and the third stop surface can abut against the first driving member when the first driving member retracts to prevent it from retracting.

[0026] Furthermore, the actuator has a guide channel, which includes a starting point, a first stop point, a second stop point, a third stop point, and an end point; the stop mechanism also includes a guide member disposed on the guide pivot member, at least a portion of the guide member being accommodated in the guide channel and capable of moving within the guide channel. In response to the actuator moving from the open position to the closed position, the guide member moves sequentially from the starting point to the first stop point, the second stop point, the third stop point, and the end point.

[0027] Furthermore, in response to the guide moving from the starting point to the first stop point, the first stop portion is located at the proximal end of the first drive member to prevent the first drive member from retracting.

[0028] In response to the guide moving from the first stop point to the second stop point, the second stop portion is located at the proximal end of the first drive member to prevent the first drive member from retracting;

[0029] In response to the guide moving from the second stop point to the third stop point and before moving from the third stop point to the end point, the first drive member abuts against the distal end of the third stop portion to prevent the first drive member from retracting.

[0030] Furthermore, in response to the guide moving from the third stop point to the end point, the third stop part separates from the first drive member.

[0031] Furthermore, the first driving element has an initial position, a first position, a second position, and a third position;

[0032] When the guide is located at the starting point, the first drive is located at the initial position;

[0033] When the guide is located at the first stop point, the first drive is located at the first position;

[0034] When the guide member is located at the second stop point, the first drive member is located at the second position;

[0035] When the guide member is located at the third stop point, the first drive member is located at the third position;

[0036] Before the guide member moves from the third stop point to the end point, the first drive member remains in the third position.

[0037] Furthermore, the clamping clamp includes a housing, and the anti-retraction mechanism further includes a biasing spring; the guide pivot also has a pivot portion, a guide portion, and a force-receiving portion, with the pivot portion disposed between the guide portion and the force-receiving portion;

[0038] The pivot portion is pivotally connected to the housing so that the guide pivot member can rotate relative to the housing. The guide member is disposed on the guide portion, and the bias spring abuts against the force-receiving portion.

[0039] The movement of the actuator causes the guide to move around the pivot under the action of the bias spring, so that the first stop, the second stop and the third stop can be located in sequence at the proximal end of the first drive to prevent the first drive from moving backward.

[0040] Furthermore, when the actuator is in the intermediate position, the first drive member disengages from the actuator, and the third stop portion abuts against the first drive member to prevent the first drive member from retracting.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows: The clamp of the present invention, by setting a first stop and a second stop, prevents the clamp delivery rod from retracting and resetting before the clamp is delivered to the ready position, thus avoiding the occurrence of clamp delivery failure. By setting a third stop, the clamp located in the clamp jaw assembly is prevented from retracting and causing the problem of being unable to clamp blood vessels or tissues, thus ensuring smooth clamping and improving the reliability and safety of the operation. Attached Figure Description

[0042] Figure 1 is a schematic diagram of the first angle of the clamping forceps provided in a specific embodiment of the present invention;

[0043] Figure 2 is a structural schematic diagram of the second angle of the clamping forceps provided in a specific embodiment of the present invention;

[0044] Figure 3 is a structural schematic diagram of the clamping forceps at the third angle provided in a specific embodiment of the present invention;

[0045] Figure 4 is a structural schematic diagram of a portion of the fourth angle region of the clamping forceps provided in a specific embodiment of the present invention;

[0046] Figure 5 is a structural schematic diagram of a portion of the fifth angle region of the clamping forceps provided in a specific embodiment of the present invention;

[0047] Figure 6 is a structural schematic diagram of a portion of the first angle of the clamping forceps provided in a specific embodiment of the present invention;

[0048] Figure 7 is a schematic diagram of the structure of the base provided in a specific embodiment of the present invention;

[0049] Figure 8 is a structural schematic diagram of the actuator at a first angle provided in a specific embodiment of the present invention;

[0050] Figure 9 is a structural schematic diagram of a portion of the sixth angle region of the clamping forceps provided in a specific embodiment of the present invention;

[0051] Figure 10 is a structural schematic diagram of the clamp at the seventh angle provided in a specific embodiment of the present invention. Figure 10 is a top view of Figure 1.

[0052] Figure 11 is a structural schematic diagram of a portion of the eighth angle of the clamping forceps provided in a specific embodiment of the present invention;

[0053] Figure 12 is a structural schematic diagram of a portion of the ninth angle of the clamping forceps provided in a specific embodiment of the present invention;

[0054] Figure 13 is a structural schematic diagram of a portion of the tenth angle of the clamping forceps provided in a specific embodiment of the present invention;

[0055] Figure 14 is a schematic diagram of the clamping compartment provided in a specific embodiment of the present invention;

[0056] Figure 15 is a cross-sectional view of the clamping pliers at the eleventh angle provided in a specific embodiment of the present invention, wherein the clamping rod does not perform the clamping action;

[0057] Figure 16 is a cross-sectional view of the clamp at the eleventh angle provided in a specific embodiment of the present invention, wherein the clamping rod delivers the clamp to the ready position;

[0058] Figures 17A-17B are schematic diagrams of the structure of the guide pivot provided in a specific embodiment of the present invention;

[0059] Figure 18 is a structural schematic diagram of the first angle of the clamp provided in a specific embodiment of the present invention, wherein the actuator is in the open position;

[0060] Figure 19 is a structural schematic diagram of the first angle of the clamping pliers provided in a specific embodiment of the present invention, wherein the first driving member moves to the first position;

[0061] Figure 20 is a structural schematic diagram of the first angle of the clamping pliers provided in a specific embodiment of the present invention, wherein the actuator is in the middle position;

[0062] Figure 21 is a structural schematic diagram of the first angle of the clamping pliers provided in a specific embodiment of the present invention, wherein the actuator is in the closed position;

[0063] Figure 22 is a structural schematic diagram of a portion of the first angle of the clamping forceps provided in a specific embodiment of the present invention;

[0064] Figure 23 is a schematic diagram of the guide channel provided in a specific embodiment of the present invention;

[0065] Figure 24 is a structural schematic diagram of the actuator at the second angle provided in a specific embodiment of the present invention;

[0066] Figures 25A-B are schematic diagrams of the path switching component provided in a specific embodiment of the present invention;

[0067] Figure 26 is a structural schematic diagram of the actuator at the third angle provided in a specific embodiment of the present invention;

[0068] Figure 27 is a structural schematic diagram of the clamping forceps at the twelfth angle provided in a specific embodiment of the present invention;

[0069] Figure 28A is a state diagram of the path switching component when the actuator is in the open position;

[0070] Figure 28B is a state diagram of the path switching component before the actuator moves from the open position to the closed position;

[0071] Figure 29A is a state diagram of the path switching component when the actuator is in the closed position;

[0072] Figure 29B is a state diagram of the path switching component before the actuator resets and reaches the open position.

[0073] Figure 30 is a structural schematic diagram of the clamp at the thirteenth angle provided in a specific embodiment of the present invention;

[0074] Figure 31 is a structural schematic diagram of the clamping forceps at the fourteenth angle provided in a specific embodiment of the present invention;

[0075] Figure 32 is a structural schematic diagram of the clamping forceps at the fifteenth angle provided in a specific embodiment of the present invention;

[0076] Figure 33A is a schematic diagram of the cooperation between the operating element and the locking element, wherein the operating element is in the locked state;

[0077] Figure 33B is a schematic diagram of the cooperation between the operating element and the locking element, wherein the operating element is in the unlocked state;

[0078] Figure 34 is a structural schematic diagram of the clamping forceps at the first angle provided in a specific embodiment of the present invention, mainly to show the connecting parts;

[0079] Figure 35 is a structural schematic diagram of the clamp at the sixteenth angle provided in a specific embodiment of the present invention.

[0080] Figure 36 is a structural schematic diagram of the clamp at the first angle provided in a specific embodiment of the present invention, mainly to show the cooperation method between the connector and the spindle;

[0081] Figure 37 is a structural schematic diagram of the connecting sleeve provided in a specific embodiment of the present invention;

[0082] The reference numerals in the above figures are as follows: 1-Shaft assembly; 2-Second longitudinal axis; 3-Main shaft; 4-Retaining ring; 5-First receiving groove; 6-Jaw assembly; 7-First longitudinal axis; 8-Clamping chamber; 9-First cavity; 10-Second cavity; 11-Inlet; 12-Outlet; 13-Actuator; 14-Grip part; 15-Push claw; 16-Pivot end; 17-Handle housing; 18-First head housing; 19-Second head housing; 20-Second limiting surface; 21-Limiting plate; 22-First driving component; 23-Annular flange; 24-Feeding rod; 25-Outer tube; 26-Sleeve; 27-Closing tube; 29-Seat body; 30-First rod body; 31-Second rod body; 32-Sliding groove; 33-Limiting part; 34-Weight reduction groove; 35-Pushing part; 36-Base; 37-First socket part; 38-First slot; 39-Second socket part; 40-Second slot; 41-First oblong hole; 42-The Two oblong holes; 43-First guide surface; 44-Second guide surface; 45-Guide post; 46-First clutch element; 47-Post body; 48-Stop block; 49-Clamping block; 50-First spring; 51-First push post; 52-Second push post; 53-First pivot axis; 54-Second pivot axis; 55-Second spring; 56-Third spring; 57-Fourth spring; 58-Rotating element; 59-Clamp; 60-Third clamp; 61-Second clamp; 62-First clamp; 63-Torsion spring; 64-First torsion arm; 65-Second torsion arm; 66-Push plate; 67-Guide pivot; 68-First stop; 69-First guide surface; 70-First stop surface; 71-Second stop; 72-Third stop; 73-Pivot; 74-Guide; 75-Force-bearing part; 76-First swing arm; 77-Second swing arm; 78-Third swing arm; 79-Reinforcing rib; 80-Offset spring; 81-Guide; 82-Guide channel; 83-Main channel; 84-Slave channel; 85-First wall; 86-Blocking wall; 87-Second wall; 88-Guide wall; 89-Starting point; 90-First stop point; 91-First stop point 92-Second stop point; 93-End point; 94-Path switching component; 95-Pivot part; 96-First trigger part; 97-Second trigger part; 98-Actuating part; 99-Baffle; 101-First guide rib; 102-First guide ramp; 103-Second guide rib; 104-Second guide ramp; 105-Protrusion; 106-First recess; 107-Second recess; 108-Operating element; 109-Protrusion; 110-Locking component; 111-Recess; 112-Drive rod; 113-Shaft; 114-Fifth spring; 115-First clamp arm; 116-Second clamp arm; 117-Sixth spring; 118-First transmission component; 119-First tooth; 120-Second transmission component; 121-Second tooth; 122-Limiting tooth; 123-First connecting rod; 124-Second connecting rod; 125-Connector; 126-First plane;127 - Second plane; 128 - Connecting sleeve; 129 - First stop; 130 - Second stop; 131 - Luer connector; 132 - Rotating component; 133 - First connecting part; 134 - Second connecting part; 135 - Through hole; 136 - First pin; 137 - Second pin; 138 - Opening; 139 - Third longitudinal axis. Detailed Implementation

[0083] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0084] It is important to understand that the terms "proximal" and "distal" used in this article are relative to the clinician manipulating the handle assembly of the clamp. "Proximal" refers to the part closer to the clinician, while "distal" refers to the part farther from the clinician. That is, the handle assembly is proximal, and the jaw assembly is distal. For example, the proximal end of a component refers to the end relatively closer to the handle assembly, and the distal end refers to the end relatively closer to the jaw assembly. However, clamps can be used in many orientations and positions, so these terms expressing relative positional relationships are not limited or absolute.

[0085] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. It should be noted that when "connected" or "linked" is preceded by a qualifier, it has the meaning defined by that qualifier, excluding only obviously excluded cases, but not other possible cases. For example, "detachable connection" refers to a detachable connection, excluding an integral part, but movable connections are not excluded.

[0086] Referring to the placement direction and angle of the clamps in Figure 1, the term "first direction" used in this article refers to the direction perpendicular to the paper in Figure 1. "Second direction" refers to the up-down direction (i.e., the vertical direction). The "first direction" and the "second direction" are perpendicular to each other.

[0087] Please refer to Figure 1. This embodiment provides a clamping forceps, specifically a continuous clamping forceps, for applying clamps 59 to the human body, such as blood vessels or other tissues other than blood vessels.

[0088] This embodiment of the clamp includes an operating component, a lever assembly 1 extending from the operating component, a jaw assembly 6, a transmission mechanism, and a clamping chamber 8. The clamping chamber 8 has clamps 59. The jaw assembly 6 is located at the distal end of the lever assembly 1.

[0089] The operating assembly includes a housing and an actuator 13 movably mounted on the housing. The housing is divided into a head housing and a handle housing 17 extending from the underside of the head housing. The handle housing 17 and the actuator 13 form a handle assembly. A user can hold the handle housing 17 with one hand and pull the actuator 13 with their finger, causing the actuator 13 to move relative to the housing. Those skilled in the art will readily recognize that although the actuator 13 is shown and described, the clamps disclosed herein may also be designed without it. For example, the clamps may be electrically powered and may include an actuation button for actuating a motor to control the firing of the device.

[0090] In this embodiment, part of the transmission mechanism is housed within the housing of the operating component, and part of the transmission mechanism is located in the lever assembly 1. To realize the clamping action and the jaw closing action (clamping action), the transmission mechanism includes a clamping drive mechanism and a jaw drive mechanism. The clamping drive mechanism is used to perform the clamping action, and the jaw drive mechanism is used to perform the jaw closing action.

[0091] The transmission mechanism may have a first state and a second state. In the first state, the clamp delivery drive mechanism drives the clamp 59 of the clamp chamber 8 to move to the jaw assembly 6, so that the clamp 59 is stably clamped in the jaw assembly 6 to await clamping. In the second state, the jaw drive mechanism drives the jaw assembly 6 to move, so that the jaw assembly 6 closes, thereby clamping the tissue or blood vessel with the clamp 59 in the jaw assembly 6.

[0092] Actuator 13 provides power to the transmission mechanism. Specifically, the transmission mechanism also includes a switching mechanism, which selectively drives either the clamping drive mechanism or the jaw drive mechanism. Actuator 13 abuts against the switching mechanism to provide power, and the switching mechanism selectively transmits this power to either the clamping drive mechanism or the jaw drive mechanism. Actuator 13 can drive the switching mechanism to move distally. When the transmission mechanism is in the first state, the switching mechanism moves distally to drive the clamping drive mechanism to move distally. After the switching mechanism moves distally by a preset stroke, the transmission mechanism switches from the first state to the second state. When the transmission mechanism switches to the second state, the switching mechanism continues to move distally to drive the jaw drive mechanism to move distally.

[0093] The switching mechanism is operably connected to the jaw drive mechanism, which has a push part 35. By pushing the push part 35, the jaw drive mechanism can be moved to a distal end. Specifically:

[0094] When the transmission mechanism is in the first state, the switching mechanism is combined with the clamping drive mechanism to drive the clamping drive mechanism to move; the switching mechanism is separated from the pushing part 35 of the jaw drive mechanism. When the switching mechanism drives the clamping drive mechanism to move, the jaw drive mechanism is not driven and is in a stationary state.

[0095] When the transmission mechanism is in the second state, the switching mechanism is separated from the clamp feeding drive mechanism, and the clamp feeding drive mechanism no longer moves forward; the switching mechanism is combined with the push part 35 of the jaw drive mechanism to drive the jaw drive mechanism to move, so that the jaw drive mechanism drives the jaw assembly 6 to move.

[0096] In this embodiment, the movements of the clamping drive mechanism and the jaw drive mechanism are independent and performed in a time-sharing manner, which can prevent some problems caused by their linkage, such as complex structure and complex motion relationship.

[0097] In this embodiment, the doctor operates an actuator 13, which in turn acts on a switching mechanism, selectively activating two different drive mechanisms: a clamp delivery drive mechanism and a jaw drive mechanism. This allows the two different drive mechanisms to complete their respective actions in a preset sequence. In other words, the doctor can complete both the clamp delivery and jaw closing actions within one overall stroke by operating a single actuator 13. These two actions follow a preset sequence without interference, ensuring the safety and smoothness of the doctor's surgical procedure. Furthermore, the operation is simple and user-friendly.

[0098] Referring to Figures 2 and 12, the clamping drive mechanism includes a first drive member 22 and a clamping rod 24 connected to the first drive member 22. The rod assembly 1 includes a main shaft 3. The first drive member 22 is sleeved on the main shaft 3 and can move along the main shaft 3. The main shaft 3 is provided with a first receiving groove 5, which extends along the longitudinal direction of the main shaft 3. The clamping rod 24 is located in the first receiving groove 5 and moves within the first receiving groove 5. The proximal end of the clamping rod 24 is connected to the first drive member 22, and the distal end of the clamping rod 24 can act on the clamp 59.

[0099] The first driving member 22 can drive the clamping rod 24 to move, thereby driving the clamp 59 of the clamping chamber 8 into the jaw assembly 6. Specifically, in the first state, the switching mechanism is operably connected to the first driving member 22 to perform the clamping action. The switching mechanism drives the first driving member 22 to move distally, causing the clamping rod 24 to move distally to push the clamp 59 of the clamping chamber 8 against the jaw assembly 6. In the second state, the switching mechanism is separated from the first driving member 22, the first driving member 22 no longer moves forward, and at this time the clamp 59 has been stably clamped in the jaw assembly 6.

[0100] Referring to Figures 3-5, the jaw drive mechanism includes an outer tube 25 and a second drive member, and a switching mechanism is operably connected to the second drive member. The outer tube 25 is sleeved on the main shaft 3 of the shaft assembly 1, and the distal end of the outer tube 25 mates with the jaw assembly 6 (see the description below for details). The proximal end of the outer tube 25 is connected to the second drive member, which can drive the outer tube 25 to move in order to drive the jaw assembly 6 to move.

[0101] A pusher 35 is disposed on the second drive member. The switching mechanism drives the pusher 35 to move the second drive member distally. In the first state, the switching mechanism is separated from the pusher 35, and the switching mechanism does not drive the second drive member distally; the second drive member is stationary. In the second state, the switching mechanism abuts against the pusher 35 to perform a jaw closing action; the switching mechanism drives the second drive member distally, causing the outer tube 25 to move distally to close the jaw assembly 6.

[0102] Referring to Figures 4-5 and 11, the second driving component includes a seat 29, a first rod 30, and a second rod 31. The seat 29 is sleeved on the main shaft 3, and its distal end is connected to the proximal end of the outer tube 25. The seat 29 has a first side and a second side, which are arranged opposite to each other along a first direction. A first connecting portion 133 extends outward from the first side, and a second connecting portion 134 extends outward from the second side. The distal end of the first rod 30 is connected to the first connecting portion 133, and the distal end of the second rod 31 is connected to the second connecting portion 134. In this embodiment, two rods are provided to make the movement of the second driving component more balanced and to improve the overall stability of the transmission mechanism. Of course, only one rod can be provided.

[0103] The two rods have largely the same structure. Taking one rod as an example, the structure of the rod will be described. A sliding groove 32 is provided on the rod; the sliding groove 32 is a closed groove. A pushing part 35 is provided on the rod, specifically at the far end of the sliding groove 32. Since the second driving member in this embodiment includes two rods, the jaw driving mechanism has two pushing parts 35. To reduce the weight of the rods, each rod is also provided with a weight-reducing groove 34, located on the far side of the sliding groove 32. The pushing part 35 is located between the sliding groove 32 and the weight-reducing groove 34. The purpose of providing the weight-reducing groove 34 is to reduce the weight of the rods, making the overall weight of the clamp lighter and easier to use. The purpose of providing the sliding groove 32 is to guide the switching mechanism; the switching mechanism at least partially moves within the sliding groove 32, making the movement of the switching mechanism more stable. The specific structure will be described in detail later.

[0104] The switching mechanism includes a base 36, a first clutch mechanism, and a second clutch mechanism. To make the overall structure of the switching mechanism more compact, to fully utilize the internal space of the clamping jaws, and to ensure smoother and more stable movement, a portion of the first clutch mechanism is housed within the base 36, and at least a portion of the second clutch mechanism is housed within the base 36. The actuator 13 abuts against the base 36 to provide power to the switching mechanism, causing it to move to the distal end.

[0105] Referring to Figures 6-7, when the transmission mechanism is in the first state, the base 36 is fitted onto the first driving member 22. Specifically, the base 36 has a through hole 135, in which the first driving member 22 is accommodated. The through hole 135 penetrates both the distal and proximal end faces of the base 36, allowing the first driving member 22 to pass through it. When the transmission mechanism is in the second state, the first driving member 22 stops moving forward, while the base 36 continues to move forward, separating the base 36 from the first driving member 22.

[0106] The first clutch mechanism includes a first clutch element 46 and a clutch switching mechanism. The first clutch element 46 is connected to the clutch switching mechanism. The second clutch mechanism includes a second clutch element.

[0107] When the transmission mechanism is in the first state, the second clutch is separated from the pushing part 35 of the second drive member, and the first clutch 46 is connected to the first drive member 22, so that the switching mechanism can drive the first drive member 22 to move so that the clamping rod 24 moves, thereby performing the clamping action.

[0108] When the transmission mechanism is in the second state, under the action of the clutch switching mechanism, the first clutch 46 disengages from the first driving member 22; the second clutch abuts against the pushing part 35 of the second driving member, enabling the switching mechanism to drive the second driving member to move, thereby driving the outer tube 25 to move and thus performing the jaw closing action. The structure and principle of the switching mechanism will be explained in more detail below with reference to the placement direction and angle of the clamps in Figure 1:

[0109] Referring to Figures 4 and 6, the base 36 has a first side and a second side opposite to each other along a first direction. The first side of the base 36 is provided with a first sleeve portion 37, and the second side of the base 36 is provided with a second sleeve portion 39. The first sleeve portion 37 is fitted onto the first rod 30 and can move along the first rod 30, while the second sleeve portion 39 is fitted onto the second rod 31 and can move along the second rod 31. This achieves an operable connection between the switching mechanism and the second driving member. The first side is also provided with a first oblong hole 41, and the second side is also provided with a second oblong hole 42. The first oblong hole 41 is located above the first sleeve portion 37, and the second oblong hole 42 is located above the second sleeve portion 39. Each oblong hole extends along a second direction.

[0110] Referring to Figures 2-3 and 5-6, the clutch switching mechanism includes a guide post 45. A guide rail is provided inside the head housing, and the guide post 45 can move on the guide rail. The guide post 45 is connected to the first clutch component 46.

[0111] Specifically, the clamp head housing includes a first head housing 18 and a second head housing 19. The first head housing 18 and the second head housing 19 are symmetrically arranged along the axial direction of the main shaft 3. Guide rails can be selectively disposed on the inner wall of either the first head housing 18 or the second head housing 19. To ensure smoother movement of the guide post 45 on the guide rails, the guide rails are symmetrically disposed on the inner walls of both the first head housing 18 and the second head housing 19. That is, both the inner walls of the first head housing 18 and the second head housing 19 are provided with guide rails. The guide post 45 has a first end and a second end. The first end of the guide post 45 moves on the guide rail on the inner wall of the first head housing 18, and the second end of the guide post 45 moves on the guide rail on the inner wall of the second head housing 19.

[0112] The guide rail includes a first guide surface 43 and a second guide surface 44. The second guide surface 44 is higher than the first guide surface 43. The guide post 45 can move on the first guide surface 43 and the second guide surface 44. The first guide surface 43 is smoothly connected to the second guide surface 44 by an inclined surface, making the movement of the guide post 45 smoother.

[0113] The guide post 45 can move on the guide rail following the movement of the first clutch member 46. When the guide post 45 moves on the first guide surface 43, the first clutch member 46 remains engaged with the first drive member 22. Since the second guide surface 44 is higher than the first guide surface 43, when the guide post 45 moves to the second guide surface 44 of the guide rail, it drives the first clutch member 46 to move upward, causing the first clutch member 46 to disengage from the first drive member 22. And when the first clutch member 46 disengages from the first drive member 22, the second clutch member abuts against the pushing part 35 of the jaw drive mechanism to push the jaw drive mechanism to move. The advantages of this configuration are that, on the one hand, the clutch switching mechanism has a simple structure, requiring no additional devices, and makes full use of the internal space of the housing, resulting in a compact structure; on the other hand, it consumes less power and operates smoothly and effortlessly.

[0114] The guide post 45 is housed in the base 36. The first end of the guide post 45 extends from the first oblong hole 41 and rests on a guide rail on the inner wall of the first head housing 18. The second end of the guide post 45 extends from the second oblong hole 42 and rests on a guide rail on the inner wall of the second head housing 19. Since each oblong hole extends along a second direction, the guide post 45 can move along the second direction (i.e., move up and down).

[0115] Referring to Figures 5-6 and 12, the first driving member 22 is an annular component, and an annular retaining edge 23 is provided on the outer peripheral surface of the first driving member 22.

[0116] Referring to Figures 4-6, the first clutch 46 is housed in the base 36. The first clutch 46 includes a column 47, a stop 48, and a locking block 49. The upper end of the column 47 is connected to the guide column 45, enabling the column 47 to move the guide column 45 to a distal or proximal end, while the guide column 45 can move the column 47 along a second direction. The stop 48 is disposed at the bottom end of the column 47, and the locking block 49 is disposed at the bottom end of the stop 48. The projection of the locking block 49 onto a plane perpendicular to the second direction is located inside the projection of the stop 48 onto that plane.

[0117] The bottom end of the locking block 49 is detachably connected to the first driving member 22. The bottom end face of the locking block 49 is an arc-shaped surface that matches the surface of the first driving member 22, making the connection between the locking block 49 and the first driving member 22 more stable. In the first state, the locking block 49 is located at the proximal end of the annular stop 23, and the distal end face of the locking block 49 abuts against the proximal end face of the annular stop 23. The locking block 49 can push the annular stop 23 distally, causing the first driving member 22 to move distally. In the second state, the locking block 49 moves upward and separates from the annular stop 23.

[0118] The proximal end face of the locking block 49 is an inclined surface. Therefore, when the first driving member 22 and the first clutch member 46 are reset (see the following description), the proximal end face of the locking block 49 can pass through the far end of the annular stop 23, so that the locking block 49 returns to the proximal end of the annular stop 23.

[0119] The first clutch element 46 also includes a first spring 50. The first spring 50 is sleeved on the column 47, with its upper end abutting against the guide post 45 and its lower end abutting against the upper end of the stop block 48. In the first state, the first spring 50 is in a compressed state, exerting a downward force on the stop block 48, making the bottom end of the clamping block 49 more stably abut against the first driving element 22, thus improving the stability of the clamping action.

[0120] In summary, when the transmission mechanism is in the first state, under the action of the actuator 13, the base 36 moves to the distal end, the first clutch 46 moves to the distal end, and the guide post 45 moves to the distal end along the first guide surface 43 under the action of the first clutch 46. When the guide post 45 moves from the first guide surface 43 to the second guide surface 44, the guide post 45 drives the first clutch 46 to move upward, so that the first clutch 46 is separated from the first drive member 22, and the transmission mechanism switches to the second state.

[0121] Referring to Figures 4-5, the second clutch includes two push pins: a first push pin 51 and a second push pin 52. The first push pin 51 is located in the sliding groove 32 of the first rod 30 and can move within it. Both its upper and lower ends are connected to the first sleeve portion 37. The first push pin 51 engages with the pushing portion 35 of the first rod 30. The second push pin 52 is located in the sliding groove 32 of the second rod 31 and can move within it. Both its upper and lower ends are connected to the second sleeve portion 39. The second push pin 52 engages with the pushing portion 35 of the second rod 31. Because the sliding groove 32 is a closed groove, the push pins will not disengage from it.

[0122] The second clutch element can also consist of only one pusher. In this embodiment, two pushers are provided to make the switching mechanism's push on the lever more balanced and stable. This embodiment, by providing two levers, two sleeves, and two pushers, makes the movement of the switching mechanism more balanced, and also makes the movement of the second driving element more balanced, thereby improving the overall stability of the transmission mechanism.

[0123] When the transmission mechanism is in the first state, the first pusher 51 separates from the pushing part 35 of the first rod 30, and the second pusher 52 separates from the pushing part 35 of the second rod 31. Under the action of the actuator 13, the base 36 moves to the distal end, the first pusher 51 moves to the distal end in the sliding groove 32 of the first rod 30 and gradually approaches the pushing part 35 of the first rod 30, and the second pusher 52 moves to the distal end in the sliding groove 32 of the second rod 31 and gradually approaches the pushing part 35 of the second rod 31.

[0124] When the transmission mechanism is in the second state, the first pusher 51 abuts against the pushing part 35 of the first rod 30, and the second pusher 52 abuts against the pushing part 35 of the second rod 31. As a result, the second clutch drives the second drive member to move to the distal end, so that the outer tube 25 moves to the distal end to close the jaw assembly 6.

[0125] As described above, the actuator 13 abuts against the base 36 to provide power to the switching mechanism, causing the switching mechanism to move to the distal end.

[0126] Referring to Figures 7-8, the proximal end of the first socket 37 is provided with a first slot 38, and the proximal end of the second socket 39 is provided with a second slot 40. Correspondingly, the actuator 13 has a gripping portion 14 and symmetrically arranged push claws 15 extending from the gripping portion 14 into the head housing. One push claw 15 is disposed in the first slot 38, and the other push claw 15 is disposed in the second slot 40. The gripping portion 14 is for the user to hold. This makes the force applied by the actuator 13 to the base 36 more uniform, makes the contact between the actuator 13 and the base 36 more stable, and allows the base 36 to move forward smoothly.

[0127] The inner wall of the first head housing 18 of the clamping clamp is provided with a first limiting surface (not shown in the attached figure). The first limiting surface mates with the bottom end face of the first socket 37, and the bottom end of the first socket 37 is located on the first limiting surface. The first limiting surface extends along the movement trajectory of the first socket 37. Referring to Figure 9, the inner wall of the second head housing 19 of the clamping clamp is provided with a second limiting surface 20. The second limiting surface 20 mates with the bottom end face of the second socket 39, and the bottom end of the second socket 39 is located on the second limiting surface 20. The second limiting surface 20 extends along the movement trajectory of the second socket 39. Thus, when the base 36 moves to the distal or proximal end, the first socket 37 moves on the first limiting surface, and the second socket 39 moves on the second limiting surface 20, making the movement of the base 36 more stable and precise. The structures of the first limiting surface and the second limiting surface 20 are substantially the same.

[0128] Referring to Figures 1 and 10, in this embodiment, the jaw assembly 6 is pivotally connected to the shaft assembly 1 so that the jaw assembly 6 can rotate relative to the shaft assembly 1 about a first pivot axis 53. Specifically, the jaw assembly 6 defines a first longitudinal axis 7, and the shaft assembly 1 defines a second longitudinal axis 2. The jaw assembly 6 can rotate relative to the shaft assembly 1 about the first pivot axis 53, such that the first longitudinal axis 7 is parallel to or at an angle to the second longitudinal axis 2. This facilitates the doctor's adjustment of the position and angle of the jaw assembly 6, thereby making it convenient to use.

[0129] This embodiment of the clamp also includes a transmission assembly, a steering rod assembly, and an operating element 108. The operating element 108 is drivably connected to the transmission assembly, which is drivably connected to the steering rod assembly. In response to a force applied to the operating element 108, the operating element 108 moves to drive the transmission assembly to move, such that the steering rod assembly moves to drive the jaw assembly 6 to rotate relative to the rod body assembly 1 about a first pivot axis 53.

[0130] Referring to Figure 11, the transmission assembly is operably connected to the main shaft 3. The transmission assembly includes a first transmission member 118 and a second transmission member 120. The second transmission member 120 is sleeved on the main shaft 3, and the first transmission member 118 and the second transmission member 120 are operably connected. The transmission assembly is located proximal to the base 29 and distal to the pusher portion 35. That is, the transmission assembly is generally located between the base 29 and the pusher portion 35. Positioning the transmission assembly between the base 29 and the pusher portion 35 makes the overall instrument layout more compact and easier to operate. Specifically, the operating element 108 should be as close as possible to the handle assembly so that the operating element 108 can be operated by the same hand that operates the handle assembly. This makes the surgeon's operation more convenient and improves surgical efficiency.

[0131] In this embodiment, the operating element is located close to the actuator 13. Taking Figure 3 as an example, the operating element 108 is located to the upper left of the actuator 13 and close to it. During actual operation, the doctor holds the handle housing 17 with their thumb, operates the operating element 108 with their index finger, and operates the actuator 13 with the other fingers, enabling complete manipulation of the clamp with only one hand. Since the transmission assembly is driven by the operating element 108, in order to achieve effective force transmission and structural compactness, the transmission assembly should be as close as possible to the operating element. Therefore, it is preferable to place the transmission assembly between the base 29 and the push part 35. The specific structures of the transmission assembly, the steering rod assembly, and the operating element will be described in detail later.

[0132] Because the transmission component is located between the seat 29 and the push part 35, the distance between the seat 29 and the push part 35 is increased. Therefore, the seat 29 and the push part 35 need to be connected by a rod. As mentioned above, in order to reduce the weight of the rod, a weight-reducing groove 34 needs to be set in the rod to effectively reduce the weight of the rod, making the overall weight of the clamp lighter and more convenient to use.

[0133] As described above, the switching mechanism moves distally along the main shaft 3, causing the second clutch to abut against the pushing part 35 of the second drive member. When the second clutch abuts against the pushing part 35 of the second drive member, the switching mechanism continues to move distally, causing the second drive member to move distally and close the jaw assembly 6. When the jaw assembly 6 is closed, there is a preset distance between the switching mechanism and the transmission assembly along the second longitudinal axis 2 of the rod assembly 1. In other words, the switching mechanism never contacts the transmission assembly as it moves distally, the transmission assembly is not obstructed from the movement of the switching mechanism, and the movement of the switching mechanism and the movement of the transmission assembly do not interfere with each other.

[0134] Referring to Figures 4-5, the clamp also includes a first reset member, which stores first energy during the movement of the switching mechanism toward the distal end. Upon releasing the first energy, the switching mechanism moves to the proximal end and resets under the action of the first reset member. Specifically, the first reset member includes two second springs 55. One second spring 55 is sleeved on the first rod 30, with its proximal end abutting against the distal end of the first sleeve portion 37 and its distal end abutting against the first connecting portion 133 of the seat 29. The other second spring 55 is sleeved on the second rod 31, with its proximal end abutting against the distal end of the second sleeve portion 39 and its distal end abutting against the second connecting portion 134 of the seat 29. During the movement of the switching mechanism toward the distal end, the first sleeve portion 37 gradually approaches the first connecting portion 133, while the second sleeve portion 39 gradually approaches the second connecting portion 134. The two second springs 55 can be compressed to store the first energy. Upon releasing the first energy, the switching mechanism can move to the proximal end and reset.

[0135] Referring to Figures 5 and 12, each sliding groove 32 has a limiting part 33 at its proximal end. In the initial state (i.e., when the switching mechanism has not moved to the distal end), under the action of the first reset member, the push post abuts against the limiting part 33 of its sliding groove 32. When the base 36 of the switching mechanism is reset under the action of the first reset member, the push post slides to the proximal end in the sliding groove 32 until it abuts against the limiting part 33. Due to the limiting part 33, the push post stops at the limiting part 33, allowing the base 36 of the switching mechanism to be reset to that position.

[0136] Referring to Figures 4-5, the clamp also includes a second reset member. The second reset member stores second energy during the movement of the clamping drive mechanism towards the distal end. Releasing the second energy, the clamping drive mechanism moves towards the proximal end and resets under the action of the second reset member. Specifically, the second reset member includes a third spring 56, which is sleeved on the main shaft 3. The proximal end of the third spring 56 abuts against the distal surface of the annular retaining edge 23 of the first drive member 22, and the distal end of the third spring 56 abuts against a retaining ring 4 outside the main shaft 3. The retaining ring 4 extends circumferentially along the main shaft 3 and is located near the transmission assembly. During the process of the switching mechanism driving the first drive member 22 to move towards the distal end, the annular retaining edge 23 of the first drive member 22 gradually approaches the retaining ring 4, causing the third spring 56 to be compressed and store second energy. Releasing the second energy allows the first drive member 22 to move towards the proximal end and reset, i.e., the clamping drive mechanism moves towards the proximal end and resets.

[0137] Referring to Figure 12, the feed rod 24 is housed in the first receiving groove 5. In the initial state (i.e., when the feed rod 24 has not moved to the distal end), under the action of the second resetting member, the proximal end of the feed rod 24 can abut against the proximal end face of the first receiving groove 5. When the first driving member 22 moves to the proximal end to reset under the action of the second resetting member, the feed rod 24 moves until its proximal end abuts against the proximal end face of the first receiving groove 5, causing the feed rod 24 to stop moving further to the proximal end and reset to that position. The first driving member 22 also stops moving further to the proximal end under the action of the feed rod 24.

[0138] Referring to Figures 3 and 11, the clamp also includes a third reset component. This third reset component stores and releases third energy during the distal movement of the jaw drive mechanism, causing the jaw drive mechanism to move proximally and reset under the action of the third reset component. Specifically, the third reset component includes a fourth spring 57, which is sleeved on the outer tube 25. The proximal end of the fourth spring 57 abuts against the distal end face of the seat 29, and the distal end of the fourth spring 57 abuts against the inner wall of the head housing. During the distal movement of the second drive component driven by the switching mechanism, the fourth spring 57 is compressed to store and release third energy, allowing the second drive component to move proximally and reset, i.e., the jaw drive mechanism moves proximally and resets.

[0139] Referring to Figure 3, the head housing of the clamp is provided with a limiting plate 21, which is symmetrically arranged on the inner walls of the first head housing 18 and the second head housing 19. In the initial state (i.e., when the jaw drive mechanism has not moved to the distal end), under the action of the third reset member, the seat 29 of the second drive member abuts against the limiting plate 21. When the second drive member moves to the proximal end and resets under the action of the third reset member, the seat 29 moves to abut against the limiting plate 21. Due to the limiting effect of the limiting plate 21, the second drive member can stop moving further to the proximal end, allowing the second drive member to reset to that position.

[0140] Referring to Figure 13, the clamp in this embodiment also includes a rotating member 58. The jaw assembly 6 and the shaft assembly 1 are pivotally connected via the rotating member 58. The proximal end of the rotating member 58 is pivotally connected to the distal end of the spindle 3, allowing the rotating member 58 to rotate relative to the shaft assembly 1 about a first pivot axis 53. The distal end of the rotating member 58 is connected to the jaw assembly 6. Specifically, the jaw assembly 6 includes a first clamp arm 115 and a second clamp arm 116 pivotally connected to the distal end of the rotating member 58. The first clamp arm 115 and the second clamp arm 116 can move closer to each other. When the rotating member 58 rotates relative to the shaft assembly 1 about the first pivot axis 53, the jaw assembly 6 can rotate with the rotating member 58. That is, the jaw assembly 6 can rotate relative to the shaft assembly 1 about the first pivot axis 53 under the drive of the rotating member 58.

[0141] A clamping magazine 8 is disposed on the rotating member 58. When the rotating member 58 rotates relative to the rod assembly 1 about the first pivot axis 53, the clamping magazine 8 can rotate with the rotating member 58. Referring to FIG14, the clamping magazine 8 includes at least two clamps 59. The clamping magazine 8 has a clamping cavity to accommodate the clamps 59, and the clamps 59 are stacked within the clamping cavity. The stacking direction of the clamps 59 is at an angle to the first longitudinal axis 7 of the jaw assembly 6. In this embodiment, it is preferable that the stacking direction of the clamps 59 is perpendicular to the first longitudinal axis 7. In other embodiments, the stacking direction of the clamps 59 is at an acute angle or an obtuse angle to the first longitudinal axis 7.

[0142] The number of clips 59 in the clip chamber 8 is adjustable. The number of clips 59 does not affect the normal use of the clamping forceps. In actual use, the number of clips 59 can be adjusted according to the needs of use. During the operation, a continuous clamping process generally applies three clips 59 to the tissue or blood vessel. Therefore, in this embodiment, the clip chamber 8 includes three clips 59.

[0143] Referring to Figure 14, the clamping chamber 8 includes a first chamber 9 and a second chamber 10. Using the placement direction and angle of the clamps in Figure 14 as a reference, the first chamber 9 is positioned above the second chamber 10, and the first chamber 9 communicates with the second chamber 10. The proximal end of the second chamber 10 intersects with the proximal end face of the clamping chamber 8, forming the inlet 11 of the second chamber 10, and the distal end of the second chamber 10 intersects with the distal end face of the clamping chamber 8, forming the outlet 12 of the second chamber 10.

[0144] The clamping chamber 8 has three clamps 59 arranged from top to bottom as clamp 60, clamp 61, and clamp 62. Clamps 60 and 61 are located in the first cavity 9, and clamp 62 is located in the second cavity 10. The clamping chamber 8 also includes a biasing assembly that can apply a generally downward force to the upper surface of clamp 60. Specifically, the biasing assembly includes a torsion spring 63 and a push plate 66. The torsion spring 63 has a first torsion arm 64 and a second torsion arm 65. If no external force is applied, the two torsion arms of the torsion spring 63 will be in a naturally extended state. In the naturally extended state, the first torsion arm 64 and the second torsion arm 65 are arranged approximately along the vertical direction shown in Figure 14. In this embodiment, the first torsion arm 64 of the torsion spring 63 is engaged in the clamping chamber 8, and the second torsion arm 65 of the torsion spring 63 is rotated at a certain angle relative to its naturally extended state and then acts on clamp 60, thereby applying a force to clamp 60. The second torsion arm 65 of the torsion spring 63 is connected to the push plate 66. The torsion spring 63 applies force to the clip 60 through the push plate 66, thereby increasing the force-bearing area and enabling the torsion spring 63 to act more stably on the clip 60.

[0145] Referring to Figure 15, in the initial state (i.e., before the clamping rod 24 performs the clamping action), the distal end of the clamping rod 24 extends into the second cavity 10 from the inlet 11. Therefore, when the clamping chamber 8 rotates relative to the rod assembly 1, the clamping rod 24 also bends under the action of the clamping chamber 8 to accommodate its rotation. The clamping rod 24 is made of an elastic material, including but not limited to metal, making it a flexible clamping rod 24 capable of bending and deforming to accommodate the rotation of the clamping chamber 8.

[0146] Referring to Figure 16, when the feed lever 24 moves to the distal end (i.e. forward) and pushes the clamp 62 against the jaw assembly 6, and before the feed lever 24 moves to the reset position, the feed lever 24 abuts against the bottom of the clamp 61, so that neither the clamp 60 nor the clamp 61 moves downward.

[0147] When the feed lever 24 moves distally (i.e., forward) and pushes the clamp 62 against the jaw assembly 6, and after the feed lever 24 moves to its reset position, under the action of the biasing assembly, both clamps 60 and 61 move downward, allowing clamp 61 to enter the second cavity 10 so that clamping can continue. The downward movement of clamps 60 and 61 under the action of the biasing assembly is with reference to the placement angle and direction of the clamping forceps in Figures 14-16. When the placement direction and angle of the clamping forceps change, clamps 60 and 61 can still move into the second cavity 10 under the action of the biasing assembly.

[0148] As described above, when the transmission mechanism is in the first state, the switching mechanism engages with the clamping drive mechanism, and the clamping clamp performs the clamping action. The user manipulates the actuator 13, causing the first clutch 46 to push the first drive 22 to move distally, thereby moving the clamping rod 24 distally. The clamping rod 24 pushes the clamp 59 from the proximal end of the clamp 59 in the second cavity 10 to the jaw assembly 6, which is the moment when clamping is completed, and the position of the clamp 59 is the ready position. The ready position is the position where the clamp 59 is stably clamped by the jaw assembly 6 and can be effectively compressed to a closed state. If the clamp 59 slides in the jaw assembly 6 and is not in the ready position, insufficient support for the clamp 59 will occur during clamping, causing the clamp 59 to automatically pop out or twist, resulting in poor compression effect.

[0149] When the user manipulates actuator 13 to push clamp 62 into jaw assembly 6 via clamping rod 24, if the user accidentally releases actuator 13 before clamp 62 is pushed into the ready position, the switching mechanism will retract and reset under the action of the first reset member, causing clamping rod 24 to retract and reset. Since clamp 62 has already been pushed forward a certain distance, after clamping rod 24 retracts and resets, clamps 60 and 61 will move downwards into the second cavity 10. When the user manipulates actuator 13 again to drive clamping rod 24 to move further away, clamping rod 24 simultaneously pushes clamps 61 and 62. Due to clamp 61 interfering with clamp 62, clamping cannot be performed normally. Therefore, in this invention, before the clamping rod 24 pushes the clamp 62 into the ready position, the clamping rod 24 always stays at the proximal end of the clamp 62 to hold the clamp 62 and support the clamp 61 and the clamp 60. Even if the user accidentally releases the actuator 13, the clamping rod 24 will not move backward, and the clamp 61 and the clamp 60 will not enter the second cavity 10 in advance.

[0150] As described above, when the transmission mechanism is in the second state, the switching mechanism is separated from the clamp delivery drive mechanism, and the switching mechanism is engaged with the push part 35 of the jaw drive mechanism, causing the clamp to perform a jaw closing action. The user operates the actuator 13, and the second clutch pushes the second drive member to move distally, causing the outer tube 25 to move distally to close the jaw assembly 6, thereby closing the clamp 59 in the jaw assembly 6. This is the clamping completion moment, and the clamp 59 in the ready position is applied to the tissue or blood vessel.

[0151] When the jaw assembly 6 closes to close the clamp 59, the clamp 59 tends to move proximally during the closing process, resulting in poor clamping effect. Therefore, in this invention's clamping forceps, when the transmission mechanism is in the second state, the clamp delivery rod 24 remains at the proximal end of the clamp 59 to prevent the clamp 59 from retracting and failing to clamp. In other words, when the transmission mechanism is in the second state, the switching mechanism is separated from the clamp delivery drive mechanism, and the clamp delivery drive mechanism does not move proximally, allowing the clamp delivery rod 24 to continue to hold the clamp 59 proximally. When the jaw assembly 6 is fully closed, the clamp 59 has been applied to the tissue or blood vessel, and the clamp delivery drive mechanism then moves proximally to reset.

[0152] To achieve the above effects, the clamp in this embodiment also includes a backstop mechanism. The backstop mechanism is housed within the head housing.

[0153] As described above, actuator 13 is movably connected to the housing. Pulling actuator 13 causes it to move relative to the housing, and actuator 13 can move to three specific positions: open position, intermediate position, and closed position. Specifically, referring to Figure 18, initially, when the user does not operate actuator 13, actuator 13 is in the open position. Referring to Figure 20, when the user operates actuator 13 and the clamping is completed, actuator 13 is in the intermediate position, and when actuator 13 is in the intermediate position, clamp 59 is in the ready position. Referring to Figure 21, when the user operates actuator 13 and the clamping is completed, actuator 13 is in the closed position.

[0154] Specifically, before the actuator 13 moves from the open position to the intermediate position, the switching mechanism engages with the clamping drive mechanism, and the clamping jaws perform a clamping action. "Before moving to the intermediate position" means that the actuator 13 has not yet reached the intermediate position. When the actuator 13 is in the intermediate position, the switching mechanism separates from the clamping drive mechanism, and simultaneously, the switching mechanism engages with the pushing part 35 of the jaw drive mechanism. When the actuator 13 moves from the intermediate position to the closed position, the clamping jaws perform a jaw closing action.

[0155] Referring to Figures 6 and 9, the anti-reverse mechanism includes a guide pivot 67. Referring to Figures 17A-17B, the guide pivot 67 has a first anti-reverse portion 68, a second anti-reverse portion 71, and a third anti-reverse portion 72. The second anti-reverse portion 71 is located between the first anti-reverse portion 68 and the third anti-reverse portion 72. Specifically, the first anti-reverse portion 68 is located proximal to the second anti-reverse portion 71, and the third anti-reverse portion 72 is located distal to the second anti-reverse portion 71.

[0156] As described above, the clamp feeding drive mechanism includes a first drive member 22 and a clamp feeding rod 24. The actuator 13 can drive the first drive member 22 to move so that the clamp feeding rod 24 pushes the clamp 59 into the jaw assembly 6.

[0157] Before the actuator 13 moves from the open position to the intermediate position, the first stop 68 and the second stop 71 are positioned sequentially at the proximal end of the first drive member 22 to prevent the first drive member 22 from retracting. Before the clamp 59 enters the ready position, if the user accidentally releases the actuator 13, the first drive member 22 will abut against the first stop 68 or the second stop 71, preventing the first drive member 22 from retracting. The clamping lever 24 will always remain at the proximal end of the clamp 59, abutting against the clamp 59, thereby avoiding clamping errors.

[0158] In response to the actuator 13 moving from the intermediate position to the closed position, the third stop 72 is located near the proximal end of the first drive member 22 and remains in contact with the first drive member 22 to prevent the first drive member 22 from retracting. "Before moving to the closed position" means that the actuator 13 has not yet moved to the closed position. Before the jaw assembly 6 closes, the first drive member 22 will not retract, and the clamping rod 24 remains near the proximal end of the clamp 59 to hold the clamp 59 in place to prevent the clamp 59 from retracting, thereby ensuring the stability of clamping.

[0159] When the actuator 13 is in the closed position, the first drive member 22 separates from the third stop 72. After the clamp 59 has been applied to the tissue or blood vessel, the third stop 72 separates from the first drive member 22, the first drive member 22 moves proximally to reset, and the clamp delivery rod 24 moves proximally to reset.

[0160] Since the base 36 of the switching mechanism has a through hole 135, the first driving member 22 is housed in the through hole 135. The through hole 135 passes through the distal end face and the proximal end face of the base 36. Therefore, when the first driving member 22 moves to the proximal end, the first driving member 22 can pass through the through hole 135 and abut against one of the first stop part 68, the second stop part 71, and the third stop part 72.

[0161] The first driving member 22 has an initial position, a first position, a second position, and a third position. The initial position is the position where the user does not operate the actuator 13 and the first driving member 22 is not moving. The switching mechanism drives the first driving member 22 to move from the initial position to the distal end, passing through the first position, the second position, and finally reaching the third position. When the actuator 13 is in the open position, the first driving member 22 is in the initial position. When the actuator 13 is in the intermediate position, the first driving member 22 is in the third position. Before the actuator 13 moves from the intermediate position to the closed position, the first driving member 22 remains in the third position.

[0162] Referring to Figure 19, when the first driving member 22 moves from the initial position to the first position, the first driving member 22 is located at the distal end of the first stop portion 68. Specifically, when the first driving member 22 moves from the initial position to the distal end to the first position, the first driving member 22 just reaches the distal end of the first stop portion 68. At this time, if the first driving member 22 moves to the proximal end, the proximal end of the first driving member 22 will abut against the first stop portion 68 and will be unable to continue retracting.

[0163] It should be noted that "moving proximally" refers to moving in the direction towards the proximal end of the clamp, while "moving distally" refers to moving in the direction towards the distal end of the clamp. This is for ease of description. Also, "proximal" and "distal" in other contexts refer to the proximal and distal ends of the clamp.

[0164] Before the first driving member 22 moves from the first position to the second position, the first driving member 22 is located between the first stop portion 68 and the second stop portion 71. Specifically, during the process of the first driving member 22 moving from the first position to the distal end before moving to the second position, the first driving member 22 moves distally between the first stop portion 68 and the second stop portion 71. During this movement, if the first driving member 22 moves proximally, the proximal end of the first driving member 22 will abut against the first stop portion 68 and will be unable to continue retracting.

[0165] When the first driving member 22 moves from the first position to the second position, the first driving member 22 is located at the distal end of the second stop portion 71. Specifically, when the first driving member 22 is in the second position, the first driving member 22 has just reached the distal end of the second stop portion 71. At this time, if the first driving member 22 moves to the proximal end, the proximal end of the first driving member 22 will abut against the second stop portion 71 and will be unable to continue to move backward.

[0166] Before the first driving member 22 moves from the second position to the third position, the first driving member 22 is located between the second stop portion 71 and the third stop portion 72. Specifically, during the process of the first driving member 22 moving from the second position to the third position, the first driving member 22 moves distally between the second stop portion 71 and the third stop portion 72. During this movement, if the first driving member 22 moves proximally, the proximal end of the first driving member 22 will abut against the second stop portion 71 and will be unable to continue retracting.

[0167] Referring to Figure 20, when the first driving member 22 moves from the second position to the third position, the first driving member 22 is located at the distal end of the third stop portion 72. Specifically, when the first driving member 22 is in the third position, the first driving member 22 has just moved to the distal end of the third stop portion 72, and the third stop portion 72 abuts against the proximal end of the first driving member 22. At this time, if the first driving member 22 moves towards the proximal end, the proximal end of the first driving member 22 will abut against the third stop portion 72 and will not be able to continue to move backward.

[0168] When the first driving member 22 is in the third position, the actuator 13 is in the middle position. If the actuator 13 is continued to be manipulated, the third stop part 72 will always be in contact with the proximal end of the first driving member 22 to prevent the first driving member 22 from moving from the middle position to the closed position.

[0169] Referring to Figure 21, when the actuator 13 moves from the middle position to the closed position, the third stop part 72 disengages from the first drive member 22.

[0170] As described above, the jaw assembly 6 defines a first longitudinal axis 7. Referring to Figure 15, the clamp 59 aligned with the jaw assembly 6 along the first longitudinal axis 7 is the first clamp, i.e., clamp 62 is the first clamp. Clamp 62 is located within the second cavity 10 of the clamping chamber 8. The first drive member 22 moves distally to drive the clamping rod 24 to move clamp 62. When the first drive member 22 moves to the second position, clamp 62 moves to exit the clamping chamber 8. When the first drive member 22 moves to the third position, clamp 62 enters the ready position.

[0171] Referring to Figure 19, the first driving member 22 drives the clamping rod 24 to push the clamp 62 to the point before it is fully out of the clamping chamber 8. The first driving member 22 is located between the first stop part 68 and the second stop part 71 to prevent the first driving member 22 from retracting. Before the clamping rod 24 drives the clamp 62 to the point before it is fully out of the clamping chamber 8, the distal end of the clamp 61 abuts against the upper surface of the clamp 62, and the proximal end of the clamp 61 abuts against the upper part of the clamping rod 24. If the clamping rod 24 retracts and resets at this time, under the action of the biasing component, the proximal end of the clamp 61 will fall into the second cavity 10. When the clamping rod 24 moves forward again, the distal end of the clamping rod 24 will push against the clamp 61 and will not be able to continue pushing against the clamp 62. Due to the interference of the clamp 61, the clamping rod 24 cannot deliver the clamp 62 to the ready position, thus causing a clamping failure. In this embodiment, the clamping rod 24 will not retract before the clamp 62 moves to the end of the clamping chamber 8, thus preventing clamping failure.

[0172] The first driving member 22 drives the clamping rod 24 to push the clamp 62 to move until it is fully out of the clamping chamber 8 and before it reaches the ready position. The first driving member 22 is positioned between the second stop part 71 and the third stop part 72 to prevent the first driving member 22 from retracting. When the clamping rod 24 drives the clamp 62 to move to the fully out of the clamping chamber 8 and before it reaches the ready position, the clamp 61 abuts against the upper part of the clamping rod 24. If the clamping rod 24 retracts and resets at this time, under the action of the biasing component, the clamp 61 completely falls into the second cavity 10. When the clamping rod 24 moves forward again, the distal end of the clamping rod 24 will push against the clamp 61 and will not be able to continue pushing against the clamp 62, resulting in a clamping failure. In this embodiment, the clamping rod 24 does not retract before the clamp 62 reaches the ready position, thus preventing a clamping failure.

[0173] Referring to Figure 20, when the first driving member 22 drives the clamping rod 24 to push the clamp 62 to the ready position, the first driving member 22 moves to the distal end of the third stop 72 and abuts against the distal end of the third stop 72 to prevent the first driving member 22 from retracting. When the clamping rod 24 drives the clamp 62 to the ready position, if the clamping rod 24 retracts to reset, the clamp 62 will retract under force during the closing of the jaw assembly 6, making clamping impossible. However, in this embodiment, the clamping rod 24 does not retract before or during the closing of the jaw assembly 6; it abuts against the clamp 62 to prevent it from retracting, thereby ensuring normal clamping.

[0174] This embodiment, by setting a first stop 68 and a second stop 71, ensures that the clamp delivery rod 24 will not retract and reset before the clamp is delivered to the ready position, thus avoiding clamp delivery failure. By setting a third stop 72, it prevents the clamp 62 located in the jaw assembly 6 from retracting and causing problems such as inability to clamp blood vessels or tissues, ensuring smooth clamping and improving the reliability and safety of the operation.

[0175] Referring to Figure 17, the proximal end of the first stop portion 68 has a first guide surface 69, and the distal end of the first stop portion 68 has a first stop surface 70. The first drive member 22 can move from the first guide surface 69 to between the first stop portion 68 and the second stop portion 71. The first stop surface 70 can abut against the first drive member 22 when the first drive member 22 retracts to prevent it from retracting.

[0176] The third stop portion 72 is located on the far side of the second stop portion 71. The proximal end of the second stop portion 71 has a second guide surface, and the distal end of the second stop portion 71 has a second stop surface. The first drive member 22 can move from the second guide surface to between the second stop portion 71 and the third stop portion 72. The second stop surface can abut against the first drive member 22 when the first drive member 22 retracts to prevent it from retracting.

[0177] The proximal end of the third stop portion 72 has a third guide surface, and the distal end of the third stop portion 72 has a third stop surface. The first drive member 22 can move from the third guide surface to the distal end of the third stop portion 72. The third stop surface can abut against the first drive member 22 when the first drive member 22 retracts to prevent it from retracting.

[0178] Specifically, referring to Figure 17, the first guide surface 69 is an arc-shaped surface, and the first guide surface 69 forms an obtuse angle with the movement direction of the first driving member 22, so that the first driving member 22 can move along the first guide surface 69 and enter the distal end of the first stop portion 68. The first stop surface 70 forms an acute angle or a right angle with the movement direction of the first driving member 22, so that the first driving member 22 cannot move along the first stop surface 70 to the proximal end of the first stop portion 68, but can abut against the first stop surface 70.

[0179] The first guide surface 69, the second guide surface, and the third guide surface have roughly the same structure and their cooperation with the first driving member 22 are also roughly the same. The structure of the second guide surface and the third guide surface, as well as their cooperation with the first driving member 22, will not be described in detail here. The first anti-reverse surface 70, the second anti-reverse surface, and the third anti-reverse surface have roughly the same structure and their cooperation with the first driving member 22 are also roughly the same. The structure of the second anti-reverse surface and the third anti-reverse surface, as well as their cooperation with the first driving member 22, will not be described in detail here.

[0180] When the first driving member 22 moves to the first guide surface 69 of the first stop portion 68, the first driving member 22 exerts a force on the first stop portion 68. Under the action of the bias spring 80 (see below for details), the guide pivot member 67 moves down a certain distance. At this time, the guide member 81 also moves down a certain distance in the guide channel 82, so that the first stop portion 68 moves down and the first driving member 22 can pass through the first stop portion 68. After the first driving member 22 passes through the first stop portion 68 and moves to the far end of the first stop portion 68, under the action of the bias spring 80, the guide pivot member 67 moves up, so that the first stop portion 68 moves up again to the movement trajectory of the first driving member 22, so that the first stop portion 68 can abut against the first driving member 22. The cooperation methods of the first stop portion 68, the second stop portion 71, the third stop portion 72 and the first driving member 22 are roughly the same, and will not be described again here.

[0181] Referring to Figures 17A-17B, 22, the guide pivot 67 in this embodiment also has a pivot portion 73, a guide portion 74, and a force-receiving portion 75. The pivot portion 73 is disposed between the guide portion 74 and the force-receiving portion 75. The pivot portion 73 is pivotally connected to the housing via a first pin 136, allowing the guide pivot 67 to rotate relative to the housing around the first pin 136. The first stop portion 68, the second stop portion 71, and the third stop portion 72 are all disposed above the pivot portion 73. It should be noted that since the guide pivot 67 can rotate relative to the housing around the first pin 136, "the guide pivot 67 moves downward" and "the guide 81 moves downward" refer to the portion of the guide pivot 67 located far from the pivot portion 73, including the various stop portions, moving downward relative to the pivot as the guide pivot 67 rotates counterclockwise, and the guide 81 also moves downward relative to the pivot. Alternatively, the guide pivot 67 can be configured to move up and down as a whole with the rotation of the actuator 13.

[0182] The anti-reverse mechanism also includes a bias spring 80. One end of the bias spring 80 abuts against the force-receiving part 75, and the other end abuts against the housing. When the bias spring 80 is in a compressed state, it applies a force to the force-receiving part 75, causing the guide pivot 67 to tend to rotate clockwise about the first pin 136 of the pivot part 73.

[0183] Specifically, referring to Figures 17A-17B, the guide pivot 67 includes a first rotating arm 76 extending proximally from the pivot 73 and a second rotating arm 77 extending distally from the pivot 73. The end of the first rotating arm 76 is a force-bearing portion 75, and the end of the second rotating arm 77 is a guide portion 74. The first rotating arm 76 and the second rotating arm 77 form a lever with the first pin 136 of the pivot 73 as the fulcrum. The bias spring 80 and the guide portion 74 are located at both ends of the lever. When the bias spring 80 is in a compressed state, the bias spring 80 applies a thrust to the force-bearing portion 75, causing the guide pivot 67 to have a clockwise rotation tendency. That is, the first stop portion 68, the second stop portion 71, the third stop portion 72, and the guide portion 74 also have a clockwise rotation tendency.

[0184] Referring again to Figures 17A-17B, the guide pivot 67 further includes a third rotating arm 78 extending obliquely upward from the pivot portion 73. The third rotating arm 78 forms an obtuse angle with the first rotating arm 76. The end of the third rotating arm 78 is a first stop portion 68. A second stop portion 71 extends distally from the first stop portion 68, and a third stop portion 72 extends distally from the second stop portion 71. A reinforcing rib 79 is provided between the first rotating arm 76 and the third rotating arm 78, making the structure of the guide pivot 67 more robust and stable.

[0185] Referring to Figures 8 and 18-21, the actuator 13 includes an actuator body, a user-operated grip portion 14 disposed at one end of the actuator body, and a pusher 15 disposed at the other end of the actuator body. The pusher 15 abuts against and pushes the base 36 of the switching mechanism, causing the clamping drive mechanism or jaw drive mechanism to move. The actuator body has a pivot end 16 pivotally connected to the housing, and the actuator 13 can rotate around the pivot end 16. The actuator 13 also has a guide channel 82. The guide channel 82 is located in the actuator body and between the pivot end 16 and the pusher 15. Therefore, the guide channel 82 is disposed within the actuator 13, eliminating the need for an additional structure to accommodate the guide channel 82, resulting in a compact overall structure.

[0186] Referring to Figures 18-21, the anti-reverse mechanism of this embodiment further includes a guide member 81, which is disposed in the guide portion 74 of the guide pivot member 67. At least a portion of the guide member 81 is accommodated in the guide channel 82. When the actuator 13 rotates about its pivot end 16, the guide channel 82 rotates accordingly, causing the guide member 81 to move around the first pivot pin 136 under the action of the bias spring 80.

[0187] Referring to Figure 23, the guide channel 82 includes a starting point 89, a first stop point 90, a second stop point 91, a third stop point 92, and an ending point 93. During the user's operation of the actuator 13 moving from the open position to the closed position, the actuator 13 moves, causing relative movement between the guide channel 82 and the guide member 81. The guide member 81 can move sequentially from the starting point 89 to the first stop point 90, the second stop point 91, the third stop point 92, and the ending point 93 within the guide channel 82, following the movement of the actuator 13. The guide channel 82 is a closed channel, meaning it is surrounded on all sides. The guide member 81's movement in all directions within the guide channel 82 is restricted, preventing it from leaving the guide channel 82. Therefore, in this embodiment, the guide member 81 cannot detach from the actuator 13.

[0188] The distances from the starting point 89 to the pivot end 16 of the actuator 13 and from the ending point 93 to the pivot end 16 of the actuator 13 are both less than the distances from the first stop point 90 to the pivot end 16 of the actuator 13, less than the distances from the second stop point 91 to the pivot end 16 of the actuator 13, and also less than the distances from the third stop point 92 to the pivot end 16 of the actuator 13. That is, the positions of the first stop point 90, the second stop point 91, and the third stop point 92 are higher than the starting point 89 and the ending point 93. When the actuator 13 is pulled, the actuator 13 moves and drives the guide 81 to rotate clockwise from the starting point 89 and rise to the first stop point 90 under the action of the bias spring 80. The actuator 13 continues to move, causing the guide 81 to move from the first stop point 90 to the second stop point 91, the third stop point 92, and then down to the ending point 93. When the guide member 81 moves to the first stop point 90, the guide pivot member 67 rotates upward, causing the first stop part 68, the second stop part 71 and the third stop part 72 to move upward.

[0189] Referring to Figure 18, when guide member 81 is at the starting point 89, the first driving member 22 is in the initial position. When guide member 81 is at the first stop point 90, the first driving member 22 is in the first position. When guide member 81 is at the second stop point 91, the first driving member 22 is in the second position. When guide member 81 is at the third stop point 92, the first driving member 22 is in the third position. Before guide member 81 moves from the third stop point 92 to the end point 93, the first driving member 22 remains in the third position.

[0190] Referring to Figure 19, in response to the guide member 81 moving from the starting point 89 to the first stop point 90, the guide pivot member 67 has already rotated upwards, and the first drive member 22 has just moved to the distal end of the first stop portion 68, that is, the first stop portion 68 is located at the proximal end of the first drive member 22 to prevent the first drive member 22 from retracting. At this time, if the actuator 13 is released, the first drive member 22 will retract a short distance and then abut against the first stop portion 68 and stop retracting further, thereby preventing the first drive member 22 from retracting.

[0191] During the process of the guide member 81 moving from the first stop point 90 to the second stop point 91, the first drive member 22 moves distally between the first stop part 68 and the second stop part 71. During this process, the actuator 13 is released, and the first drive member 22 will retreat a short distance and then come into contact with the first stop part 68, stopping its continued retreat.

[0192] When the guide member 81 moves to the second stop point 91, the first drive member 22 is in the second position, and the first drive member 22 has just moved to the far end of the second stop part 71, that is, the second stop part 71 is located at the near end of the first drive member 22 to prevent the first drive member 22 from moving backward. At this time, if the actuator 13 is released, the first drive member 22 will move backward a short distance and then come into contact with the second stop part 71 and stop moving backward.

[0193] During the process of the guide member 81 moving from the second stop point 91 to the third stop point 92, the first drive member 22 moves distally between the second stop part 71 and the third stop part 72. During this process, if the actuator 13 is released, the first drive member 22 will retreat a short distance and then come into contact with the second stop part 71 and stop retreating.

[0194] Referring to Figure 20, when the guide member 81 moves to the third stop point 92, the first drive member 22 is in the third position, and the first drive member 22 has just moved to the distal end of the third stop part 72. The first drive member 22 abuts against the distal end of the third stop part 72 to prevent the first drive member 22 from retracting. When the guide member 81 moves to the third stop point 92, the actuator 13 is in the middle position, and the clamp 59 is in the ready position.

[0195] During the process of the guide member 81 moving from the third stop point 92 to the end point 93, the first drive member 22 is always in the third position, and the third stop part 72 abuts against the proximal end of the first drive member 22 to prevent the first drive member 22 from moving backward.

[0196] During the process of the guide member 81 moving from the third stop point 92 to the end point 93, the guide pivot member 67 does not move downward, so that the third stop part 72 can remain in contact with the proximal end of the first drive member 22, so that the clamping rod 24 can abut against the clamp 59 at the proximal end of the clamp 59, and the clamp 59 will not move backward during the clamping process, thereby ensuring the stability of the clamping.

[0197] Referring to Figure 21, in response to the guide member 81 moving from the third stop point 92 to the end point 93, the third stop portion 72 separates from the first drive member 22. Specifically, when the guide member 81 reaches the end point 93, the clamping is completed, the guide pivot member 67 moves downward, the third stop portion 72 moves below the first drive member 22, the first drive member 22 resets, and at this time the actuation is in the closed position.

[0198] Referring to Figure 23, the guide channel 82 includes a main channel 83 and a secondary channel 84 extending from an opening 138 of the main channel 83, the opening 138 being located between the two ends of the main channel 83. The secondary channel 84 extends from the opening 138 of the main channel 83 in a direction away from the pivot end 16, i.e., the distance between the secondary channel 84 and the pivot end 16 is greater than the distance between the main channel 83 and the pivot end 16. The main channel 83 has a starting point 89 and an ending point 93 at its two ends, respectively. A first stop point 90, a second stop point 91, and a third stop point 92 are all located within the secondary channel 84. A bias spring 80 applies a force to the guide pivot 67, allowing the guide 81 to disengage from the main channel 83 and enter the secondary channel 84.

[0199] When the guide member 81 moves from the starting point 89 of the main channel 83 into the secondary channel 84, the guide member 81 moves upward to the first stop point 90, and the guide pivot member 67 rotates upward. As the guide member 81 moves within the secondary channel 84, it passes through the second stop point 91 and the third stop point 92 in sequence. Before moving from the third stop point 92 to the end point 93, the guide member 81 continues to move within the secondary channel 84, during which time the third stop part 72 remains in contact with the first drive member 22. When the guide member 81 moves from the third stop point 92 to the end point 93 of the channel 84, the guide member 81 moves downward, causing the guide pivot member 67 to move downward, and the third stop part 72 moves to below the first drive member 22, at which point the first drive member 22 resets.

[0200] The following section details the working process of the clamp in this embodiment performing the clamping action and jaw closing action from the perspective of the guide component 81:

[0201] The operator presses the actuator 13, causing the guide 81 to move sequentially from the starting point 89 to the first stop point 90, the second stop point 91, the third stop point 92, and the end point 93.

[0202] Referring to Figures 18-19, during the process of the guide member 81 moving from the starting point 89 to the first stop point 90, the guide member 81 enters the channel 84 through the autonomous channel 83, the guide pivot member 67 rotates upward, the first stop part 68, the second stop part 71, and the third stop part 72 all move upward, and the first drive member 22 moves to the far end of the first stop part 68.

[0203] During the process of the guide member 81 moving from the first stop point 90 to the second stop point 91, the guide member 81 moves in the channel 84, and the first drive member 22 moves from the distal end of the first stop part 68 to the distal end of the second stop part 71.

[0204] During the process of the guide member 81 moving from the starting point 89 to the second stop point 91, the guide column 45 moves on the first guide surface 43. The first clutch member 46 is detachably connected to the first drive member 22, and the switching mechanism drives the first drive member 22 to move.

[0205] Before the guide member 81 moves from the second stop point 91 to the third stop point 92, the guide member 81 moves through the channel 84, and the first drive member 22 moves distally between the second stop part 71 and the third stop part 72. The guide post 45 continues to move on the first guide surface 43. When the guide post 45 moves to the inclined surface between the first guide surface 43 and the second guide surface 44, the guide member 81 is about to reach the third stop point 92 but has not yet reached it. While the guide post 45 is on the inclined surface, the first clutch member 46 remains separably connected to the first drive member 22, and the switching mechanism drives the clamping drive mechanism to move.

[0206] Referring to Figure 20, when the guide member 81 reaches the third stop point 92, the guide member 81 is still moving from the channel 84. The first drive member 22 just reaches the far end of the third stop part 72, and the third stop part 72 abuts against the proximal end of the first drive member 22. At this time, the guide post 45 just reaches the second guide surface 44, the first clutch member 46 disengages from the first drive member 22, and the second clutch member abuts against the pushing part 35 of the jaw drive mechanism. The switching mechanism can drive the jaw drive mechanism to move. When the guide member 81 reaches the third stop point 92, the actuator 13 is in the middle position. This is the moment when the clamping is completed, and the clamping drive mechanism has already sent the clamp 59 to the ready position.

[0207] Before the guide member 81 moves from the third stop point 92 to the end point 93, the guide member 81 moves in the channel 84, so that the guide pivot 67 does not move downward, and the third stop part 72 remains in contact with the proximal end of the first drive member 22. The guide post 45 moves on the second guide surface 44, the second clutch part abuts against the pushing part 35 of the jaw drive mechanism, and the switching mechanism drives the jaw drive mechanism to move.

[0208] Referring to Figure 21, when guide 81 reaches endpoint 93, guide 81 enters main channel 83, guide pivot 67 moves downward, third stop 72 separates from first drive 22, and first drive 22 resets under the action of second reset member. At this time, guide post 45 is located on second guide surface 44, and second clutch abuts against the pushing part 35 of jaw drive mechanism. When guide 81 reaches endpoint 93, actuator 13 is in closed position, which is the moment of clamping completion, and clamp 59 in ready position is applied to tissue or blood vessel. Releasing actuator 13 resets jaw drive mechanism under the action of third reset member, switching mechanism resets under the action of first reset member, and actuator 13 resets under the drive of switching mechanism.

[0209] Referring to Figure 19, in this embodiment, when the guide member 81 moves from the starting point 89 to the first stop point 90 within the guide channel 82, the first driving member 22 has already pushed the clamp 59, and the position of the clamp 59 has changed. If the guide member 81 retracts from the first stop point 90 back to the starting point 89, the first stop part 68 will move down and will not be able to prevent the first driving member 22 from retracting. If the first driving member 22 retracts, clamping interference and clamping errors will occur in the next clamping action.

[0210] Therefore, in this embodiment, when the guide member 81 moves from the starting point 89 to the first stop point 90 within the guide channel 82, the guide member 81 can be locked by the guide channel 82, and the guide member 81 cannot retract from the first stop point 90 back to the starting point 89. Specifically, referring to FIG23, the channel 84 includes a blocking wall 86. The main channel 83 includes a first wall 85 extending from the starting point 89 to connect with the blocking wall 86, and the first wall 85 and the blocking wall 86 form a right angle or an acute angle. This simple angle design of the guide channel 82 ensures that the blocking wall 86 effectively prevents the guide member 81 from retracting from the first stop point 90 back to the starting point 89.

[0211] To enable the guide member 81 to move from the third stop point 92 to the end point 93, the channel 84 also includes a guide wall 88. The main channel 83 also includes a second wall 87 extending from the end point 93 to connect with the guide wall 88, the second wall 87 forming an obtuse angle with the guide wall 88. This simple angular design of the guide channel ensures that the guide member 81 can move from the third stop point 92 to the end point 93.

[0212] In this embodiment, the actuator 13 has a forward motion and a reset motion. Specifically, from an initial moment, the user holds the actuator 13 in operation, and the actuator 13 moves from the open position to the intermediate position and then to the closed position. The movement of the actuator 13 toward the closed position is defined as the forward motion of the actuator 13. Correspondingly, the movement of the actuator 13 toward the open position is defined as the reset motion of the actuator 13.

[0213] When the actuator 13 moves in the forward direction, the guide 81 moves along the first path in the guide channel 82. When the actuator 13 moves in the reset direction, the guide 81 moves along the second path in the guide channel 82. The first path includes the main channel 83 and the slave channel 84, and the second path includes the main channel 83 but does not include the slave channel 84.

[0214] When the actuator 13 reaches the closed position, the user releases the actuator 13. Under the action of the first reset member, the switching mechanism moves to the proximal end to reset, and the actuator 13 is reset under the action of the switching mechanism. During this process, no stopping is required. The second motion path shields the channel 84 to prevent the guide member 81 from entering the channel 84 from the end point 93 during the reset motion and thus being unable to return from the first stop point 90 to the starting point 89, ensuring the smooth reset of the actuator 13 and the stop mechanism.

[0215] To achieve the aforementioned shielding from channel 84, the clamping device in this embodiment also includes a path switching component 94, a positioning mechanism, and a path driving component.

[0216] The path switching element 94 has an open state and a closed state. When the path switching element 94 is in the open state, it opens the slave channel 84 to allow the guide 81 to enter or exit the slave channel 84. When the path switching element 94 is in the closed state, it blocks the slave channel 84 to prevent the guide 81 from entering the slave channel 84.

[0217] Referring to Figure 24, the path switching element 94 is connected to the actuator 13. The path switching element 94 is disposed between the actuator 13 and the first head housing 18. As described above, the actuator body is provided with a pivot end 16 that is pivotally connected to the housing, and the actuator 13 can rotate around the pivot end 16. The gripping part 14 of the actuator 13 is disposed on one side of the pivot end 16, and the path switching element 94 is disposed on the opposite side of the pivot end 16.

[0218] Referring to Figures 24-26, the path switching component 94 includes a pivot portion 95, a first trigger portion 96, a second trigger portion 97, and an execution portion 98. The pivot portion 95 of the path switching component 94 is connected to the actuator body via a second pin 137. The path switching component 94 is rotatable relative to the actuator 13 about the second pin 137. The first trigger portion 96 is disposed on one side of the pivot portion 95, the second trigger portion 97 is disposed on the opposite side of the pivot portion 95, and the execution portion 98 is disposed on the first trigger portion 96. The execution portion 98 is correspondingly disposed to the slave channel 84 of the guide channel 82, and the execution portion 98 is used to shield the slave channel 84. Preferably, the first trigger portion 96 and the second trigger portion 97 form an obtuse angle, and this obtuse angle faces the first head housing. In other embodiments, the first trigger portion 96 and the second trigger portion 97 may form an acute angle or a right angle.

[0219] Referring to Figure 25 B-26, the actuator 98 extends a baffle 99 toward the opening 138 of the main channel 83. When the actuator 98 is tilted toward the actuator 13, the baffle 99 can close the opening 138 of the main channel 83 to close the secondary channel 84, so that the guide 81 cannot enter the secondary channel 84 from the opening 138. At this time, the guide 81 can only move along the baffle 99 from the end point 93 of the main channel 83 to the starting point 89 of the main channel 83.

[0220] When the path switching component 94 rotates relative to the actuator 13 about the second pin 137 at the pivot 95, the first trigger part 96 rotates toward the inner wall of the first head housing 18 or toward the actuator 13. When the first trigger part 96 rotates toward the inner wall of the first head housing 18, the second trigger part 97 rotates toward the actuator 13.

[0221] The positioning mechanism includes a protrusion 105, a first recess 106, and a second recess 107. Referring to FIG. 25B, the protrusion 105 is disposed on the pivot portion 95 of the path switching member 94. When the path switching member 94 rotates about the second pin 137, the protrusion 105 rotates synchronously. Referring to FIG. 18-21, both the first recess 106 and the second recess 107 are disposed on the actuator body. The protrusion 105 is elastic, allowing it to move from the first recess 106 to the second recess 107, and vice versa.

[0222] When the protrusion 105 is located inside the second recess 107, the second trigger part 97 tilts toward the actuator 13, the first trigger part 96 tilts toward the inner wall of the first head housing 18, and the execution part 98 disposed on the first trigger part 96 also tilts toward the inner wall of the first head housing 18, so that the execution part 98 gives way to the channel 84, and at this time the path switching member 94 is in the open state.

[0223] When the protrusion 105 is located inside the first recess 106, the second trigger part 97 is tilted toward the inner wall of the first head housing 18, the first trigger part 96 is tilted toward the actuator 13, and the execution part 98 disposed on the first trigger part 96 is also tilted toward the actuator 13, so that the execution part 98 closes the channel 84, and the path switching member 94 is in a closed state at this time.

[0224] When no external force is applied, the protrusion 105 is operably accommodated in the second recess 107 or the first recess 106. The protrusion 105 can be limited by the second recess 107 or the first recess 106, so that the path switching member 94 cannot rotate around the second pin 137, thereby keeping the path switching member 94 always in the open or closed state.

[0225] During the movement of the actuator 13, the path switching member 94 and the path driving member move relative to each other. The path driving member can drive the path switching member 94 to switch between an open state and a closed state. Specifically, the path driving member drives the path switching member 94 to rotate relative to the actuator 13 about the second pin 137, causing the protrusion 105 to move between the second recess 107 and the first recess 106. When the protrusion 105 of the path switching member 94 is operably accommodated in the second recess 107, the path switching member 94 needs to rotate about the second pin 137 in a first preset direction by a first angle to move the protrusion 105 into the first recess 106. When the protrusion 105 of the path switching member 94 is operably accommodated in the first recess 106, the path switching member 94 needs to rotate about the second pin 137 in a second preset direction by a second angle to move the protrusion 105 into the second recess 107. The first preset direction and the second preset direction are opposite to each other. For example, when the first preset direction is clockwise, the second preset direction is counterclockwise.

[0226] Referring to Figure 27, the path drive component includes a first guide rib 101 and a second guide rib 103, both of which are disposed on the inner wall of the first head housing 18. The first guide rib 101 has a first guide ramp 102, and the second guide rib 103 has a second guide ramp 104.

[0227] Initially, the user does not operate actuator 13, and actuator 13 is in the open position. At this time, path switching element 94 is located at the second guide rib 103 and disengaged from the first guide rib 101. In response to actuator 13 moving from the open position to the closed position, actuator 13 can drive path switching element 94 to move from the second guide rib 103 to the first guide rib 101. When actuator 13 is in the closed position, path switching element 94 is located at the first guide rib 101 and disengaged from the second guide rib 103. In response to actuator 13 moving from the closed position to the open position, actuator 13 can drive path switching element 94 to move from the first guide rib 101 to the second guide rib 103. Specifically:

[0228] Referring to Figure 28A, initially, when the actuator 13 is in the open position, the first trigger part 96 disengages from the first guide rib 101, the second trigger part 97 is located between the second guide rib 103 and the actuator 13, the second trigger part 97 does not abut against the second guide rib 103, the protrusion 105 is operably accommodated in the second recess 107, the second trigger part 97 is tilted toward the actuator 13, the first trigger part 96 is tilted toward the inner wall of the first head housing 18, the actuator 98 is tilted toward the inner wall of the first head housing 18, the actuator 98 clears the passage 84, and the path switching member 94 is in the open state.

[0229] Referring to Figure 28B, before the actuator 13 moves from the open position to the closed position, the actuator 13 drives the path switching member 94 to move from the second guide rib 103 to the first guide rib 101. When the first trigger part 96 moves to the first guide slope 102 of the first guide rib 101, the first trigger part 96 continues to move along the first guide slope 102. The first guide slope 102 applies force to the first trigger part 96, causing the path switching member 94 to start rotating around the second pin 137 in a first preset direction. Since it has not rotated by a sufficient angle, i.e., it has not rotated by the first angle, the protrusion 105 is still operably accommodated in the second recess 107. The second recess 107 limits the protrusion 105, and the path switching member 94 always remains in the open state. Before the actuator 13 moves forward from the open position to the closed position, the guide member 81 can move within the channel 84.

[0230] Referring to Figure 29A, when the actuator 13 reaches the closed position, the first trigger part 96 of the path switching member 94 moves along the first guide slope 102 to the space between the first guide rib 101 and the actuator 13. The path switching member 94 rotates around the second pin 137 in the first preset direction by a first angle. The protrusion 105 moves from the second recess 107 into the first recess 106, and the path switching member 94 switches to the closed state.

[0231] Referring to Figure 29B, during the process of the actuator 13 resetting from the closed position to the open position and before reaching the open position, the path switching member 94 moves from the first guide rib 101 to the second guide rib 103 under the action of the actuator 13. When the second trigger part 97 moves to the second guide slope 104 of the second guide rib 103, the second trigger part 97 continues to move along the second guide slope 104. The second guide slope 104 applies force to the second trigger part 97, causing the path switching member 94 to begin rotating around the second pin 137 in the second preset direction. Since it does not rotate by a sufficient angle, i.e., it does not rotate by the second angle, the protrusion 105 is still operably accommodated in the first recess 106. The first recess 106 limits the protrusion 105, and the path switching member 94 always remains in the closed state. During the process of the actuator 13 resetting from the closed position to the open position and before reaching the open position, the guide member 81 cannot move within the channel 84.

[0232] Referring to Figure 28A, when the actuator 13 moves from the closed position to the open position and reaches the open position, the second trigger part 97 of the path switching member 94 moves along the second guide slope 104 to the space between the second guide rib 103 and the actuator 13, so that the path switching member 94 rotates around the second pin 137 in the second preset direction by a second angle, and the protrusion 105 moves from the first recess 106 to the second recess 107, and the path switching member 94 switches to the open state.

[0233] As described above, the clamp in this embodiment also includes a transmission assembly, a steering rod assembly, and an operating element 108. Referring to FIG30, the jaw assembly 6 is pivotally connected to the main shaft 3 of the rod assembly 1 via a rotating member 58. In response to the force applied to the operating element 108, the operating element 108 moves to drive the transmission assembly to move, so that the steering rod assembly moves to drive the jaw assembly 6 to rotate relative to the rod assembly 1 about the first pivot axis 53.

[0234] Specifically, the operating element 108 is connected to the transmission assembly via a connecting assembly. Referring to FIG. 31, the connecting assembly includes a drive rod 112 and a shaft 113. The drive rod 112 defines a third longitudinal axis 139. The drive rod 112 is connected to the transmission assembly, and the third longitudinal axis 139 of the drive rod 112 is at an angle to the second longitudinal axis 2 of the rod body assembly 1. In this embodiment, the third longitudinal axis 139 is preferably perpendicular to the second longitudinal axis 2. The shaft 113 is connected to the drive rod 112, and the direction of the shaft 113 is parallel to or at an angle to the direction of the second longitudinal axis 2 of the rod body assembly 1. In this embodiment, the direction of the shaft 113 is preferably parallel to the direction of the second longitudinal axis 2 of the rod body assembly 1. Referring to FIG. 33A-33B, the operating element 108 is sleeved on the shaft 113 and can slide along the shaft 113. The operating element 108 can rotate about the third longitudinal axis 139 of the drive rod 112 and drive the drive rod 112 to rotate.

[0235] Referring to Figure 31, the transmission assembly includes a first transmission member 118 and a second transmission member 120. The first transmission member 118 has a first tooth portion 119, which includes a plurality of first teeth arranged circumferentially such that the central axis of the first tooth portion 119 is perpendicular to the second longitudinal axis 2 of the shaft assembly 1. The second transmission member 120 is sleeved on the main shaft 3 and has a second tooth portion 121, which includes a plurality of second teeth arranged generally along the second longitudinal axis 2 of the shaft assembly 1. The second tooth portion 121 is located on one side of the second transmission member 120. The plurality of second teeth are arranged in a row. The first tooth portion 119 of the first transmission member 118 meshes with the second tooth portion 121 of the second transmission member 120.

[0236] The first transmission member 118 is connected to the drive rod 112 in the connecting assembly. The operating element 108 causes the drive rod 112 to rotate, thereby driving the first transmission member 118 to rotate. The first tooth 119 meshes with the second tooth 121, causing the second transmission member 120 to produce a displacement to the distal or proximal end.

[0237] Referring again to Figure 31, the second tooth portion 121 has a first end and a second end opposite to each other along the second longitudinal axis 2 of the rod assembly 1. The first end has a limiting tooth 122, and the second end also has a limiting tooth 122. That is, the plurality of second teeth of the second tooth portion 121 are located between the two limiting teeth 122. The width of the limiting tooth 122 is greater than that of the second tooth. The limiting tooth 122 does not fit with the first tooth portion 119 of the first transmission member 118. Therefore, the first transmission member 118 cannot mesh with the limiting tooth 122, so that the first transmission member 118 can only move between the limiting teeth 122 at both ends of the second transmission member 120. Thus, when the first transmission member 118 moves to the limiting tooth 122 at the first end of the second tooth portion 121, the first transmission member 118 can no longer move. When the first transmission member 118 moves to the limiting tooth 122 at the second end of the second tooth portion 121, the first transmission member 118 can no longer move.

[0238] It should be noted that the movement of the transmission assembly is equivalent to the first transmission member 118 moving along the second tooth 121 of the second transmission member 120. However, in actual movement, the first transmission member 118 has no displacement in the direction of the second longitudinal axis 2 of the rod assembly 1, while the second transmission member 120 has a displacement towards the far end or near end in the direction of the second longitudinal axis 2 of the rod assembly 1, so as to drive the steering rod assembly to move, thereby driving the jaw assembly 6 to rotate relative to the rod assembly 1 around the first pivot axis 53.

[0239] Referring to Figure 32, the steering rod assembly includes a first link 123 and a second link 124. The main shaft 3 is provided with a second receiving groove, in which the second link 124 is disposed and movable. The proximal end of the second link 124 is connected to the second transmission member 120. The distal end of the second link 124 is pivotally connected to the proximal end of the first link 123. The distal end of the first link 123 is pivotally connected to the proximal end of the rotating member 58. Thus, when the second transmission member 120 displaces towards the distal or proximal end, it can drive the second link 124 to move towards the distal or proximal end, causing the first link 123 to rotate relative to the second link 124 in a first rotation direction or a second rotation direction. This, in turn, drives the jaw assembly 6 to rotate relative to the rod body assembly 1 about the first pivot axis 53 in the first or second rotation direction.

[0240] In this embodiment, the operating element 108 has a locked state and an unlocked state. In the locked state, the operating element 108 can only perform a first movement to switch to the unlocked state. "Can only perform a first movement" means that the operating element 108 only performs the first movement and cannot perform a second movement, thus preventing the jaw assembly 6 from rotating relative to the shaft assembly 1 about the first pivot axis 53. In the unlocked state, the operating element 108 can perform a second movement to drive the first transmission member 118 to move, thereby causing the jaw assembly 6 to rotate relative to the shaft assembly 1 about the first pivot axis 53. In the unlocked state, the operating element 108 can perform a third movement to switch to the locked state.

[0241] To lock the operating element 108, the clamp in this embodiment further includes a locking member 110, which is disposed in the head housing. Referring to FIG33B, the operating element 108 has a protrusion 109, which is located between the locking member 110 and the drive rod 112.

[0242] Referring to Figures 33A-33B, the locking member 110 has a plurality of recesses 111, each recess 111 being adapted to a protrusion 109 of the operating element 108. Each recess 111 is capable of receiving the protrusion 109, and the protrusion 109 can be selectively accommodated within one of the recesses 111. In the locked state, the protrusion 109 of the operating element 108 is operably held within one of the recesses 111 of the locking member 110. In the unlocked state, the protrusion 109 of the operating element 108 disengages from its residing recess 111. Because the operating element 108 can slide along the shaft 113, the protrusion 109 of the operating element 108 can move between the drive rod 112 and the locking member 110, thereby switching the operating element 108 between the locked and unlocked states. The first movement is the sliding of the operating element 108 on the shaft 113 in the direction toward the drive rod 112; the second movement is the rotation of the operating element 108 about the third longitudinal axis 139 of the drive rod 112; and the third movement is the sliding of the operating element 108 on the shaft 113 in the direction away from the drive rod 112.

[0243] Referring to Figures 33A-33B, the clamp includes a fifth spring 114. The fifth spring 114 is sleeved on the shaft 113 and is located between the operating element 108 and the drive rod 112. When the operating element 108 slides on the shaft 113 in the direction toward the drive rod 112 (first movement), the fifth spring 114 is compressed to store reset energy and releases the reset energy, enabling the operating element 108 to perform a third movement.

[0244] In the locked state, in response to the force applied to the operating element 108, the operating element 108 makes a first movement, causing the protrusion 109 of the operating element 108 to disengage from the recess 111 in which it is located, thereby switching the operating element 108 from the locked state to the unlocked state.

[0245] In the unlocked state, in response to the force applied to the operating element 108, the operating element 108 performs a second movement, causing the jaw assembly 6 to rotate relative to the rod assembly 1 about the first pivot axis 53.

[0246] In the unlocked state, in response to the force applied to the operating element 108, the operating element 108 performs a third movement, such that the protrusion 109 of the operating element 108 is operably accommodated in one of the recesses 111 of the locking member 110, thereby switching the operating element 108 from the unlocked state to the locked state.

[0247] Referring to Figures 33A-33B, the locking member 110 is an arc-shaped component, with multiple recesses 111 disposed on the inner side of the arc-shaped component. Each recess 111 extends radially along the arc-shaped component. The multiple recesses 111 are arranged approximately circumferentially and along the movement trajectory of the second movement of the operating element 108. Thus, when the operating element 108 rotates by a preset angle, the operating element 108 can perform a third movement at that preset angle, so that the protrusion 109 of the operating element 108 is accommodated in the recess 111 corresponding to the preset angle, thereby allowing the operating element 108 to maintain the preset angle and switch to the locked state, so that the jaw assembly 6 can be stably maintained at a certain rotation angle.

[0248] The multiple recesses 111 of the locking member 110 allow the jaw assembly 6 to rotate at different angles and stably maintain that rotation angle. Specifically, the operating element 108 can drive the jaw assembly 6 to rotate relative to the lever assembly 1 about the first pivot axis 53 in a first rotation direction, and can also drive the jaw assembly 6 to rotate relative to the lever assembly 1 about the first pivot axis 53 in a second rotation direction. The rotation of the jaw assembly 6 in the first rotation direction includes a fully rotated state, at which point the jaw assembly 6 is in the first rotation position. The rotation of the jaw assembly 6 in the second rotation direction also includes a fully rotated state, at which point the jaw assembly 6 is in the second rotation position.

[0249] As described above, the operating element 108 causes the drive rod 112 to rotate, thereby driving the first transmission member 118 to rotate. The first tooth 119 meshes with the second tooth 121, causing the second transmission member 120 to displace towards the distal or proximal end. When the first transmission member 118 moves to the limiting tooth 122 at the first end of the second tooth 121, the first transmission member 118 can no longer move, and at this time the jaw assembly 6 is in the first rotation position. When the first transmission member 118 moves to the limiting tooth 122 at the second end of the second tooth 121, the first transmission member 118 can no longer move, and at this time the jaw assembly 6 is in the second rotation position.

[0250] The operating element 108 can drive the jaw assembly 6 to rotate to a first rotation position, and also to a second rotation position, and can drive the jaw assembly 6 to rotate between the first and second rotation positions. Since the multiple recesses 111 of the locking member 110 are arranged along the rotation trajectory of the second movement of the operating element 108, the operating element 108 can perform a third movement after rotating a preset angle to selectively accommodate itself in a recess 111 corresponding to that preset angle, thereby switching the operating element 108 to a locked state. This allows the jaw assembly 6 to be stably held in the first rotation position, the second rotation position, or a position between the first and second rotation positions. In other words, the jaw assembly 6 can rotate relative to the lever assembly 1 at multiple angles and can stably maintain its rotation angle, thus making the use of the clamping pliers more flexible. Both the first and second rotation positions are relative to the lever assembly 1, and are the positions of the jaw assembly 6 relative to the lever assembly 1.

[0251] Referring to Figures 34-35, in this embodiment, the outer tube 25 includes a sleeve 26 and a closing tube 27. The sleeve 26 is fitted onto the main shaft 3, and the closing tube 27 is fitted onto the clamping chamber 8 and the rotating component 58. The proximal end of the sleeve 26 is connected to the seat 29 of the second driving component, and the distal end of the sleeve 26 is pivotally connected to the proximal end of the closing tube 27. The distal end of the closing tube 27 engages with the jaw assembly 6. The sleeve 26 can move proximal or distal, causing the closing tube 27 to move proximal or distal, thereby opening or closing the jaw assembly 6. Specifically, the jaw assembly 6 includes a first jaw arm 115 and a second jaw arm 116. Referring to Figure 32, a sixth spring 117 is provided between the first jaw arm 115 and the second jaw arm 116. When the closing tube 27 moves distally (i.e., forward), the jaw assembly 6 is received within the closing tube 27 from its distal end. At this time, the sixth spring 117 is compressed to store energy, and the jaw assembly 6 closes. As the closed tube 27 moves proximally (i.e. backward), the jaw assembly 6 extends from the distal end of the closed tube 27, and the sixth spring 117 releases energy to open the jaw assembly 6.

[0252] The sleeve 26 is pivotally connected to the closed tube 27, and since the closed tube 27 is sleeved on the rotating member 58, when the rotating member 58 rotates, in response to the force applied to the closed tube 27 by the rotating member 58, the closed tube 27 rotates relative to the sleeve 26 about the second pivot axis 54.

[0253] The jaw assembly 6 includes a fully open state and a fully closed state. Referring to the placement angle and direction of the clamps in Figure 34, when the jaw assembly 6 is in the fully open state, the vertical distance between the distal ends of the first clamp arm 115 and the second clamp arm 116 is at its maximum; when the jaw assembly 6 is in the fully closed state, the vertical distance between the distal ends of the first clamp arm 115 and the second clamp arm 116 is at its minimum. The complete closure of the jaw assembly 6 causes the clamp 59 between the first clamp arm 115 and the second clamp arm 116 to change from an open state to a fully closed state to clamp tissue or blood vessels. When the jaw assembly 6 is in both the fully open and fully closed states, the first pivot axis 53 coincides with the second pivot axis 54.

[0254] Referring to Figure 1, the clamp also includes a rotating component 132. The rotating component 132 is fitted onto the sleeve 26 and fixedly connected to the sleeve 26. Thus, by rotating the rotating component 132, the sleeve 26 can be driven to rotate about the second longitudinal axis 2 of the rod assembly 1. When the sleeve 26 moves forward or backward, the rotating component 132 also moves forward or backward with the sleeve 26.

[0255] Referring to Figures 34-35, in this embodiment, the sleeve 26 and the closed tube 27 are pivotally connected by two connectors 125. Thus, when the sleeve 26 rotates around the second longitudinal axis 2 of the rod assembly 1 under the drive of the rotating member 132, the sleeve 26 can drive the closed tube 27 to rotate. That is, by rotating the rotating member 132, the sleeve 26, the two connectors 125, and the closed tube 27 all rotate.

[0256] Specifically, referring to Figure 36, each connector 125 has a first plane 126 adapted to the main shaft 3, and the distal end of the main shaft 3 has a second plane 127 adapted to the first plane 126. Thus, when the rotating member 132 rotates, causing the sleeve 26 to rotate and thus each connector 125 rotates, each first plane 126 and its corresponding second plane 127 engage, causing the main shaft 3 to rotate with the connector 125. That is, when the rotating member 132 rotates, causing each connector 125 to rotate, the connector 125 can exert a force on the main shaft 3 to drive the main shaft 3 to rotate around the second longitudinal axis 2 of the shaft assembly 1. This causes the main shaft 3 to drive the rotating member 58 to rotate, causing the closing tube 27 and the jaw assembly 6 to rotate, thereby facilitating the doctor to adjust the jaw assembly 6 to a suitable angle to clamp blood vessels or tissue. The jaw assembly 6 rotates relative to the shaft assembly 1 around the first pivot axis 53, allowing the first longitudinal axis 7 of the jaw assembly 6 to be parallel to or at an angle to the second longitudinal axis 2 of the shaft assembly 1. When the first longitudinal axis 7 of the jaw assembly 6 is parallel to or at an angle to the second longitudinal axis 2 of the rod assembly 1, the sleeve 26 can be rotated by rotating the rotating member 132, and the connecting member 125 can be rotated to drive the main shaft 3 to rotate, thereby causing the closed tube 27, the rotating member 58, the clamping chamber 8, the steering rod assembly, the clamping drive mechanism, the jaw drive mechanism, and the jaw assembly 6 to all rotate.

[0257] In this embodiment, due to the limitation of the first transmission member 118, the second transmission member 120 cannot rotate around the second longitudinal axis 2 of the shaft assembly 1. To accommodate the rotation of the main shaft 3, the second transmission member 120 is connected to the main shaft 3 via a connecting sleeve 128. Specifically, referring to Figures 31-32, the connecting sleeve 128 is sleeved on the main shaft 3. The second transmission member 120 is sleeved on the connecting sleeve 128. The proximal end of the second connecting rod 124 is fixedly connected to the connecting sleeve 128. The second connecting rod 124 is disposed in the second receiving groove of the main shaft 3. When the main shaft 3 rotates around the second longitudinal axis 2 of the shaft assembly 1, it drives the second connecting rod 124 to rotate around the second longitudinal axis 2 of the shaft assembly 1. Thus, the second connecting rod 124 drives the connecting sleeve 128 to rotate synchronously with the main shaft 3 around the second longitudinal axis 2 of the shaft assembly 1. During the rotation of the connecting sleeve 128 around the second longitudinal axis 2 of the shaft assembly 1, the second transmission member 120 does not rotate, that is, there is relative rotation between the connecting sleeve 128 and the second transmission member 120.

[0258] Referring to Figure 37, a first stop 129 is provided at the distal end of the connecting sleeve 128, and a second stop 130 is provided at the proximal end of the connecting sleeve 128. Both the first stop 129 and the second stop 130 extend circumferentially. A second transmission member 120 is disposed between the first stop 129 and the second stop 130. Thus, when the second transmission member 120 undergoes displacement toward the distal or proximal end, the second transmission member 120 can act on the first stop 129 or the second stop 130, causing the connecting sleeve 128 to move toward the distal or proximal end, thereby causing the second connecting rod 124 to move toward the distal or proximal end.

[0259] Referring to Figure 1, the clamp also includes a Luer connector 131, which is connected to the rotating member 132. In this embodiment, the Luer connector 131 is a common Luer connector in the prior art, and its purpose is to connect the inside and outside of the clamp to facilitate cleaning of the inside of the clamp. The structure of the Luer connector 131 will not be described in detail here.

[0260] The sleeve 26 has a flushing hole that communicates with the interior of the sleeve 26. The Luer connector 131 has a flushing channel. The flushing channel has an inlet and an outlet. The outlet of the flushing channel communicates with the flushing hole of the sleeve 26. Flushing fluid is injected into the inlet of the Luer connector 131, allowing the flushing fluid to enter the interior of the clamp through the flushing channel and flushing hole to clean the interior of the clamp and remove contaminants, thus enabling the clamp to be reused. When the sleeve 26 moves forward or backward, the rotating member 132 also moves forward or backward with the sleeve 26, and therefore the Luer connector 131 also moves forward or backward accordingly. This prevents the Luer connector 131 from restricting the forward and backward movement of the sleeve 26 and ensures that the Luer connector 131 can always communicate with the flushing hole of the sleeve 26. In this embodiment, the flushing hole of the sleeve 26 is located inside the rotating member 132. The inlet of the flushing channel of the Luer connector 131 is located outside the rotating part 132, and the outlet of the flushing channel is located inside the rotating part 132 and communicates with the flushing hole of the sleeve 26.

[0261] In this embodiment, the jaw assembly 6 is connected to the outlet 12 of the second cavity 10 of the clamping chamber 8. The second cavity 10 is not coaxial with the rod body assembly 1. Therefore, the jaw assembly 6 and the rod body assembly 1 are also not coaxial. The jaw assembly 6 is offset relative to the rod body assembly 1. Therefore, the first longitudinal axis 7 of the jaw assembly 6 and the second longitudinal axis 2 of the rod body assembly 1 do not coincide.

[0262] In summary, the clamping forceps in this embodiment, by setting a first stop and a second stop, prevent the clamping rod from retracting and resetting before the clamp is delivered to the ready position, thus avoiding clamping failure. By setting a third stop, the clamp located in the jaw assembly is prevented from retracting and causing problems such as inability to clamp blood vessels or tissues, ensuring smooth clamping and improving the reliability and safety of the operation.

[0263] The clamping pliers in this embodiment are equipped with a clamping drive mechanism to perform the clamping action and a jaw drive mechanism to perform the jaw closing action. The pushing action is eliminated, which reduces the probability of failure during the clamping process and improves the stability of the clamping action.

[0264] In this embodiment, the clamping forceps have independent and time-separated movements of the clamping drive mechanism and the jaw drive mechanism, which can prevent some problems caused by the linkage between the two, such as complex structure and complex motion relationship.

[0265] In this embodiment, when the jaw assembly 6 is closed, the switching mechanism and the transmission assembly have a preset distance along the second longitudinal axis 2 of the rod assembly 1, so that when the switching mechanism moves to the far end, it will never come into contact with the transmission assembly. The setting of the transmission assembly will not hinder the movement of the switching mechanism, and the movement of the switching mechanism and the movement of the transmission assembly can not interfere with each other.

[0266] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0267] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A clip applier, comprising: The device comprises a clip bin, a jaw assembly, a clip feeding driving mechanism, a retreat preventing mechanism and an actuating member; the clip bin comprises clips; the clip feeding driving mechanism comprises a first driving member and a clip feeding rod, the actuating member drives the first driving member to move so that the clip feeding rod pushes the clips from the clip bin into the jaw assembly; the retreat preventing mechanism comprises a guide pivoting member, the guide pivoting member has a first retreat preventing part, a second retreat preventing part and a third retreat preventing part, the second retreat preventing part is located between the first retreat preventing part and the third retreat preventing part; The actuating member has an open position, an intermediate position and a closed position, when the actuating member is in the intermediate position, the clips are in a preparation position; Before the actuating member moves from the open position to the intermediate position, the first retreat preventing part and the second retreat preventing part are in turn located at the proximal end of the first driving member to prevent the first driving member from retreating; Before the actuating member moves from the intermediate position to the closed position, the third retreat preventing part is located at the proximal end of the first driving member and keeps abutting with the first driving member to prevent the first driving member from retreating; When the actuating member is in the closed position, the first driving member is separated from the third retreat preventing part.

2. The clip applier of Claim 1, wherein, The first driving member has an initial position, a first position, a second position and a third position; when the actuating member is in the open position, the first driving member is in the initial position, when the actuating member is in the intermediate position, the first driving member is in the third position; When the first driving member moves from the initial position to the first position, the first retreat preventing part is located at the proximal end of the first driving member; Before the first driving member moves from the first position to the second position, the first driving member is located between the first retreat preventing part and the second retreat preventing part; When the first driving member moves from the first position to the second position, the second retreat preventing part is located at the proximal end of the first driving member; Before the first driving member moves from the second position to the third position, the first driving member is located between the second retreat preventing part and the third retreat preventing part; When the first driving member moves from the second position to the third position, the third retreat preventing part is located at the proximal end of the first driving member.

3. The clip applier of Claim 2, wherein, The jaw assembly defines a first longitudinal axis; the clip bin comprises at least two clips, at least two of the clips are stacked along a preset direction, the preset direction is at an angle to the first longitudinal axis, wherein the clip aligned with the jaw assembly along the first longitudinal axis is a first clip.

4. The clip applier of Claim 3, wherein, Before the first driving member drives the clip feeding rod to push the first clip to move out of the clip bin completely, the first driving member is located between the first retreat preventing part and the second retreat preventing part to prevent the first driving member from retreating.

5. The clip applier of any one of Claims 1, 4, wherein, The second retreat-preventing part is located distally to the first retreat-preventing part, a proximal end of the first retreat-preventing part has a first guide surface, a distal end of the first retreat-preventing part has a first retreat-preventing surface, the first driving member is movable from the first guide surface to between the first retreat-preventing part and the second retreat-preventing part, the first retreat-preventing surface abuts against the first driving member when the first driving member is retracted to prevent the first driving member from being retracted.

6. The clip applier of Claim 3, wherein, The first driving member drives the pusher to push the first clip to move to the fully out of the clamping chamber and to reach the preparation position, the first driving member is located between the second retreat-preventing part and the third retreat-preventing part to prevent the first driving member from being retracted.

7. The clip applier of any one of Claims 1, 6, wherein, The third retreat-preventing part is located distally to the second retreat-preventing part, a proximal end of the second retreat-preventing part has a second guide surface, a distal end of the second retreat-preventing part has a second retreat-preventing surface, the first driving member is movable from the second guide surface to between the second retreat-preventing part and the third retreat-preventing part, the second retreat-preventing surface abuts against the first driving member when the first driving member is retracted to prevent the first driving member from being retracted.

8. The clip applier of Claim 3, wherein, The first driving member drives the pusher to push the first clip to move to reach the preparation position, the first driving member moves to the distal end of the third retreat-preventing part and abuts against the distal end of the third retreat-preventing part to prevent the first driving member from being retracted.

9. The clip applier of any one of Claims 1, 8, wherein, A proximal end of the third retreat-preventing part has a third guide surface, a distal end of the third retreat-preventing part has a third retreat-preventing surface, the first driving member is movable from the third guide surface to the distal end of the third retreat-preventing part, the third retreat-preventing surface abuts against the first driving member when the first driving member is retracted to prevent the first driving member from being retracted.

10. The clip applier of Claim 1, wherein, The actuating member has a guide channel, the guide channel includes a starting point, a first retreat-preventing point, a second retreat-preventing point, a third retreat-preventing point and an ending point; The retreat-preventing mechanism further includes a guide member, the guide member is arranged on the guide pivoting member, at least part of the guide member is accommodated in the guide channel and is movable in the guide channel, in response to the actuating member moving from the opening position to the closing position, the guide member moves from the starting point to the first retreat-preventing point, the second retreat-preventing point, the third retreat-preventing point and the ending point in sequence.

11. The clip applier of Claim 10, wherein, In response to the guide member moving from the starting point to the first retreat-preventing point, the first retreat-preventing part is located at a proximal end of the first driving member to prevent the first driving member from being retracted. In response to the guide member moving from the first retreat-preventing point to the second retreat-preventing point, the second retreat-preventing part is located at a proximal end of the first driving member to prevent the first driving member from being retracted. In response to the guide member moving from the second retreat-preventing point to the third retreat-preventing point and before moving from the third retreat-preventing point to the ending point, the first driving member abuts against a distal end of the third retreat-preventing part to prevent the first driving member from being retracted.

12. The clip applier of Claim 11, wherein, In response to the guide member moving from the third retreat-preventing point to the ending point, the third retreat-preventing part is separated from the first driving member.

13. The clip applier of claim 10, wherein the clip driver is configured to rotate the clip about the clip axis. The first driving member has an initial position, a first position, a second position and a third position; ​ When the guide member is located at the starting point, the first driving member is located at the initial position; The first driving member is located at the first position when the guide member is located at the first retreat-stop point; The first driving member is located at the second position when the guide member is located at the second retreat-stop point; The first driving member is located at the third position when the guide member is located at the third retreat-stop point; The first driving member is kept at the third position before the guide member moves from the third retreat-stop point to the terminal point.

14. The clip applier of Claim 10, wherein, The clip applier comprises a housing, and the retreat-stop mechanism further comprises a biasing spring; the guide pivot member further has a pivot portion, a guide portion and a force receiving portion, and the pivot portion is arranged between the guide portion and the force receiving portion; The pivot portion is pivotally connected with the housing so that the guide pivot member can rotate relative to the housing, the guide member is arranged on the guide portion, and the biasing spring abuts against the force receiving portion; Movement of the actuating member drives the guide member to move around the pivot portion under the action of the biasing spring, so that the first retreat-stop portion, the second retreat-stop portion and the third retreat-stop portion can be sequentially located at the proximal end of the first driving member to prevent the first driving member from retreating.

15. The clip applier of Claim 1, wherein, The first driving member is disengaged from the actuating member when the actuating member is located at the intermediate position, and the third retreat-stop portion abuts against the first driving member to prevent the first driving member from retreating.

Images