clip applier

Abstract

A clip applier is provided, which includes a handle assembly, a barrel assembly, a proximal end of the barrel assembly being connected with the handle assembly, and a jaw assembly, a proximal end of the jaw assembly being connected with a distal end of the barrel assembly. The barrel assembly includes a sleeve, a storage assembly disposed in the sleeve and configured to store a plurality of ligating clips, and a push assembly disposed in the sleeve and configured to push a distal-most ligating clip of the plurality of ligating clips into the jaw assembly. The push assembly includes a clamping mechanism, the clamping mechanism including a force receiving portion and a clamping portion, and the clamping mechanism is configured to cause the clamping portion to clamp the distal-most ligating clip by applying a force to the force receiving portion, thereby causing the distal-most ligating clip to move in a distal direction.

Description

Technical Field

[0001] This application relates to surgical instruments, and more specifically, to a clamping forceps. Background Technology

[0002] During surgical procedures, surgeons use ligation clips to close cut blood vessels. Compared to suturing blood vessels with sutures, using ligation clips is relatively simpler and faster. The instrument used to operate the ligation clip is usually called a clip clamp, and the ligation clip is mounted in the jaws at the end of the instrument. During surgery, the clip clamp, equipped with the ligation clip, is inserted into the designated location in the body cavity through a trocar. After locating the blood vessel to be ligated, the surgeon closes the jaws and ligation clip externally by pulling the trigger on the handle of the clip clamp.

[0003] Currently, there are clip-applying products capable of continuously launching multiple ligation clips, allowing surgeons to insert multiple clips into body cavities. However, existing products still have some shortcomings; for example, the ligation clips may become blocked in the delivery track or accidentally detach from the jaws.

[0004] Therefore, the purpose of this application is to provide a more reliable clamping product to solve the above-mentioned problems. Summary of the Invention

[0005] This application discloses a clamping pliers, including a handle assembly, a barrel assembly, and a jaw assembly. The proximal end of the barrel assembly is connected to the handle assembly. The proximal end of the jaw assembly can be connected to the distal end of the barrel assembly. In some embodiments, the barrel assembly may include a sleeve, a storage assembly disposed within the sleeve, and a pusher assembly disposed within the sleeve. The storage assembly may be configured to store a plurality of ligation clips, and the pusher assembly may be configured to push the distalmost ligation clip into the jaw assembly. In some embodiments, the pusher assembly may include a clamping mechanism, which may include a force-receiving portion and a clamping portion. The clamping mechanism may be configured to apply force to the force-receiving portion, causing the clamping portion to clamp the distalmost ligation clip, thereby moving the distalmost ligation clip in a distal direction. The clamping pliers according to this application, by utilizing the clamping mechanism to clamp the distalmost ligation clip while using the pusher assembly to push the distalmost ligation clip, avoids possible blockage or accidental dislodgement of the ligation clip, thereby providing ligation clips for continuous firing in a safe and efficient manner.

[0006] In some embodiments, the storage assembly may include a track, a first push rod disposed in the track, and a first spring sleeved on the first push rod. A plurality of ligation clips may be arranged sequentially along the axial direction of the track. The distal end of the first push rod may abut against the nearest ligation clip among the plurality of ligation clips. In some embodiments, the first spring is compressed, and the distal end of the track may include an elastic baffle, such that the plurality of ligation clips are held between the elastic baffle and the distal end of the first push rod by the elastic force provided by the first spring. Under the combined action of the first spring and the elastic baffle, the plurality of ligation clips are axially and sequentially stored in the storage assembly between the distal end of the first push rod and the elastic baffle.

[0007] In some embodiments, the pushing component may further include a second spring, a first slider, and a sliding component. The distal end of the second spring may be connected to the proximal end of the first push rod, the first slider may be connected to the proximal end of the second spring, and the sliding component may not contact the first slider when not under force. In some embodiments, the force-receiving portion of the clamping mechanism may include a first force-receiving portion and a second force-receiving portion. The first force-receiving portion may be fixed to the first slider, and the second force-receiving portion may be fixed to the sliding component. In some embodiments, the pushing component may be configured to apply a force to the sliding component in the distal direction, causing the sliding component and the second force-receiving portion to move in the distal direction, and causing the clamping portion to gradually clamp the distal ligation clip. In some embodiments, the pushing component may further be configured to, as the sliding component moves to contact the first slider and continues to move in the distal direction, the first slider overcomes the elastic force of the second spring and compresses the second spring, causing the first slider and the first force-receiving portion to also move in the distal direction, and causing the clamping portion to move in the distal direction while clamping the distal ligation clip, until the distal ligation clip is pushed into the jaw assembly. According to the embodiment, the clamping forceps can ensure that after clamping the farthest ligation clip first, the pushing component is used to push the farthest ligation clip into the jaw assembly, thereby further preventing the ligation clip from accidentally falling off and enhancing operational safety.

[0008] In some embodiments, the clamping mechanism may be formed by bending a sheet metal strip or by symmetrically connecting two sheet metal strips to provide appropriate elasticity and flexibility.

[0009] In some embodiments, the jaw assembly may include a throat and a pair of jaws, each jaw hinged to the throat such that each jaw can close and open relative to the throat to receive a ligation clip in an open state and close it at a target location.

[0010] In some embodiments, the jaws include a groove conforming to the shape of the ligation clips to accommodate multiple ligation clips and guide the multiple ligation clips to move within the groove in a proximal / distal direction.

[0011] In some embodiments, the ligation clip includes a protrusion, and the inside of the jaws includes a recess adapted to receive and lock the protrusion.

[0012] In some embodiments, the sliding assembly may include a second push rod, a third spring coaxially disposed with respect to the second push rod, a second slider coaxially disposed with respect to the second push rod, and a third slider located at the proximal end of the second slider. The third spring may be disposed at the proximal end of the clamping mechanism, and the distal end of the second slider may abut against the proximal end of the third spring. In some embodiments, the jaw assembly may further include a first pull wire and a pair of second pull wires. The distal end of the first pull wire may branch to connect to the middle of each jaw respectively, and the proximal end of the first pull wire may connect to the third slider. The distal end of each second pull wire may connect to the proximal end of each jaw respectively, and the proximal end of each second pull wire is connected to the second slider respectively. The sliding assembly and jaw assembly can be configured such that: by applying a force to the third slider in the proximal direction, the first pull wire moves with the third slider in the proximal direction, causing the jaws to close; and the closing of the jaws causes the second pull wire to pull the second slider in the distal direction and compress the third spring; and by applying a force to the third slider in the distal direction, the first pull wire moves with the third slider in the distal direction, while the second pull wire moves with the second slider in the proximal direction due to the elastic force generated in the proximal direction by the restoration of the third spring, causing the jaws to open. The clamping pliers according to the embodiment control the closing and opening of the jaws by pulling wires, reducing the space occupied and thus reserving space for installing a clamping mechanism in the barrel assembly, as will be described in more detail below with reference to the accompanying drawings.

[0013] In some embodiments, the handle assembly may include a triggering mechanism that switches between a triggered state and a released state, a third push rod, and a transmission mechanism. The distal end of the third push rod may be connected to the proximal end of a third slider, and the transmission mechanism may be configured to convert the triggering and releasing of the triggering mechanism into movement of the third push rod in both the distal and proximal directions, thereby applying force to the third slider in both directions. The clamping forceps according to embodiments may be ready to await the next clamping and pushing operation of the clamping mechanism after the clamping and pushing operation of the ligation clip has been completed.

[0014] In some embodiments, the third slider may be magnetic, and the distal end of the third push rod may include a magnet. The connection between the distal end of the third push rod and the proximal end of the third slider is achieved by magnetic attraction between the third slider and the magnet. The third slider and the magnet can be easily disconnected to facilitate replacement of the disposable barrel assembly, thereby allowing for the reuse of the handle assembly. Attached Figure Description

[0015] The embodiments of this application are further illustrated below by way of example with reference to the accompanying drawings, which form part of this specification. In the drawings:

[0016] Figure 1 This is a perspective view of the clamping forceps according to an exemplary embodiment;

[0017] Figure 2 This is an exploded view of the barrel assembly and jaw assembly of the clamping pliers according to an exemplary embodiment;

[0018] Figure 3 This is a side sectional view of a storage component according to an exemplary embodiment;

[0019] Figure 4 This is a schematic diagram of the clamping mechanism of the push component according to an exemplary embodiment;

[0020] Figures 5a-5c This is a top sectional view of a barrel assembly according to an exemplary embodiment, showing the steps of pushing the ligation clip using a pushing component;

[0021] Figure 6 This is an exploded view of the handle assembly according to an exemplary embodiment;

[0022] Figure 7a and 7b These are the side view and the side sectional view of the handle component in an untriggered state, respectively.

[0023] Figure 8a and 8b These are the side view and the side sectional view of the handle component in the triggered state, respectively.

[0024] Figure 9 This is a side sectional view of the handle assembly and barrel assembly according to an exemplary embodiment;

[0025] Figure 10 This is a perspective view of the jaw assembly and barrel assembly according to an exemplary embodiment;

[0026] Figures 11a-11c This is a side sectional view of the jaw assembly and barrel assembly according to an exemplary embodiment, showing the steps of pushing the ligation clip from the barrel assembly into the jaw assembly; and

[0027] Figure 12a and 12b This is a side sectional view of a jaw assembly and a barrel assembly according to an exemplary embodiment, illustrating the principle of using a pull wire to close and open the jaws of the jaw assembly. Detailed Implementation

[0028] Through the following detailed description of embodiments of this application in conjunction with the accompanying drawings and specific embodiments, those skilled in the art will gain a clearer and more thorough understanding of the further features, advantages, and effects of this application. In the following description, spatial and directional terms such as “upper,” “lower,” “front,” “rear,” “top,” “bottom,” “vertical,” and “horizontal” may be used to describe embodiments of this application; however, it should be understood that these terms are merely for the convenience of describing the embodiments shown in the figures and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as “connect,” “joint,” “fixed,” and “attached” may refer to a direct connection between two elements or structures without other elements or structures, or to an indirect connection between two elements or structures through an intermediate element or structure, unless otherwise expressly stated herein. The use of ordinal numbers such as “first” and “second” is merely to distinguish the elements they refer to from one another and does not have any sequential or priority meaning, unless otherwise expressly stated herein. The terms “proximal” and “distal” as used herein are defined relative to the clinician manipulating the handle of a surgical instrument. The term "proximal" refers to the part of the component or structure that is closer to the clinician, while "distal" refers to the part of the component or structure that is farther away from the clinician.

[0029] First refer to Figure 1 , Figure 1 This is a perspective view of the clamp 1000 according to an exemplary embodiment. Figure 1 As shown, the clamp 1000 includes a jaw assembly 1100 at the distal end, a handle assembly 1300 at the proximal end, and a barrel assembly 1200 between the two. Figure 1 A knob 1400 is also shown located between the barrel assembly 1200 and the handle assembly 1300. The knob 1400 is fixed to the barrel assembly 1200, and rotating the knob 1400 changes the angle of the barrel assembly 1200 and the jaw assembly 1100 relative to the handle assembly 1300. During the procedure, the jaw assembly 1100 and the barrel assembly 1200 are inserted into the body cavity together through a trocar, and a ligation clip stored in the barrel assembly 1200 is delivered to and closed near the target blood vessel. Furthermore, Figure 1 The sleeve 1217 of the barrel assembly 1200 is also shown.

[0030] The specific structure and working principle of the jaw assembly 1100, the barrel assembly 1200, and the handle assembly 1300 will be described in detail below with reference to the exemplary embodiments in the accompanying drawings.

[0031] 1. Barrel assembly

[0032] First refer to Figure 2 , Figure 2This is an exploded view of the jaw assembly 1100 and the barrel assembly 1200 of the clamping clamp 1000 according to an exemplary embodiment. As shown, the jaw assembly 1100 includes a pair of jaws 1110a and 1110b for clamping the ligation clamp. Further detailed description of the jaw assembly 1100 will be provided in later sections.

[0033] The barrel assembly 1200 is functionally divided into a storage assembly 1210 for storing ligation clips and a push assembly 1220 for pushing the ligation clips into the jaw assembly 1100. For example... Figure 2 As shown, the storage assembly 1210 is located at the distal end of the barrel assembly 1200 and mainly includes: a rail 1211, elastic baffles 1212a and 1212b, a first push rod 1213, a first spring 1214, locking blocks 1215 and 1216, and a sleeve 1217 (in... Figure 1 (As shown in the image). Please also refer to... Figure 3 , Figure 3 This is a side sectional view of the storage component 1210 according to an exemplary embodiment. Figure 2 and Figure 3 In this configuration, multiple ligation clips 1218a (the furthest ligation clip) - 1218l (the closest ligation clip) are arranged sequentially along the axial direction of track 1211 in a queue. It is understood that the number of ligation clips shown in the figure is merely an example; different numbers of ligation clips may be used in alternative embodiments. The distal end of the first push rod 1213 abuts against the ligation clip 1218l, and the first push rod 1213 is connected to the free distal end of the first spring 1214. In the illustrated embodiment, the first spring 1214 is coaxially sleeved on the first push rod 1213, and the distal end of the first spring 1214 abuts against the proximal side of the convex distal end of the first push rod 1213. Other connection methods may also be used in alternative embodiments. The distal end of the first spring 1214 is fixed relative to the track 1211 by locking blocks 1215 and 1216. In the illustrated embodiment, locking blocks 1215 and 1216 have complementary wedge shapes and are fixed in the track 1211 by expansion bolts 1220. Other fixing methods may be used in alternative embodiments. After the ligation clips are loaded in the track 1211, on the one hand, the first spring 1214 is compressed in the proximal direction and generates elastic force in the distal direction, causing the first push rod 1213 to apply a thrust to the plurality of ligation clips 1218a-1218l in the distal direction. On the other hand, elastic baffles 1212a and 1212b are provided at the distal end of the track 1211 to prevent the ligation clip 1218a from entering the jaw assembly 1100. Thus, a queue of multiple ligation clips 1218a-1218l can be maintained between the elastic baffles 1212a and 1212b and the first push rod 1213, thereby realizing the function of the storage component 1210 in storing multiple ligation clips 1218a-1218l.

[0034] Next reference Figure 4 , Figure 4 This is a schematic diagram of the clamping mechanism 1221 of the push assembly 1220 according to an exemplary embodiment. The clamping mechanism 1221 can be formed by bending and welding a single sheet metal strip, or it can be formed by symmetrically combining two sheet metal strips 1221a and 1221b, as shown below. Figure 2 As shown in the embodiment, the clamping mechanism 1221 is similar in form to tweezers, and includes clamping portions 1221(1) and 1221(2), a first force-receiving portion 1221(3), and a second force-receiving portion 1221(4). Similar to the working principle of tweezers, when a force in a relative direction is applied to the first force-receiving portion 1221(3) and the second force-receiving portion 1221(4) along the direction of the arrow shown in the figure, the clamping mechanism 1221 will deform, causing the first force-receiving portion 1221(3) and the second force-receiving portion 1221(4) to move closer to each other, while the clamping portions 1221(1) and 1221(2) also move closer to each other to clamp the ligation clip at the farthest end between them. In the above process, the greater the force applied to the first force-receiving portion 1221(3) and the second force-receiving portion 1221(4), the greater the clamping force generated between the clamping portions 1221(1) and 1221(2). Conversely, if the force applied to the first force-bearing part 1221(3) and the second force-bearing part 1221(4) is reduced, the first force-bearing part 1221(3) and the second force-bearing part 1221(4) will move away from each other, and the clamping parts 1221(1) and 1221(2) will also move away from each other, thereby reducing the clamping force.

[0035] After explaining the basic structure and working principle of the clamping mechanism 1221, the following references... Figures 5a-5c The top sectional view is used to explain the steps of pushing the ligation clip using the pushing component 1220. For example... Figures 5a-5c As shown and can be referenced at the same time. Figure 2 The pushing assembly 1220 also includes a second spring 1222, a first slider 1223, a second push rod 1224, and a third slider 1225. The distal end of the second spring 1222 is connected to the proximal end of the first push rod 1213. In the illustrated embodiment, the distal end of the second spring 1222 contacts the proximal end of the locking block 1216. The proximal end of the second spring 1222 is connected to the first slider 1223, and the first force-receiving portion 1221(3) of the clamping mechanism 1221 is fixed to the first slider 1223 by a first bolt 1219. The second push rod 1224 and the third slider 1225 can be considered as a whole, also referred to herein as a sliding assembly, and the second force-receiving portion 1221(4) of the clamping mechanism 1221 is fixed between the second push rod 1224 and the third slider 1225.

[0036] In such Figure 5aIn the initial stage shown, no force is applied to the sliding component, the sliding component does not contact the first slider 1223, and the clamping parts 1221(1) and 1221(2) of the clamping mechanism 1221 are located on both sides of the farthest ligation clip 1218a.

[0037] In such Figure 5b In the first stage shown, a distal thrust is applied to the third slider 1225 along the axial direction, causing the third slider 1225, the second push rod 1224, and the second force-receiving part 1221(4) to move distally until the second push rod 1224 comes into contact with the first slider 1223. In this first stage, the first force-receiving part 1221(3) remains stationary due to the elastic force of the second spring 1222 in the distal direction, causing the first force-receiving part 1221(3) and the second force-receiving part 1221(4) to come closer to each other, thereby causing the clamping parts 1221(1) and 1221(2) to clamp the ligation clip 1218a.

[0038] In such Figure 5c In the second stage shown, as the pushing force continues to be applied to the third slider 1225, the second push rod 1224 begins to push the first slider 1223, thereby causing the first slider 1223 to overcome the elastic force of the second spring 1222 and move in the distal direction together with the first force-receiving part 1221(3). In this second stage, the distance between the first force-receiving part 1221(3) and the second force-receiving part 1221(4) no longer continues to decrease, and the clamping parts 1221(1) and 1221(2) maintain the state of clamping the ligation clip 1218a, moving the ligation clip 1218a toward the jaw assembly 1100 until the distal ligation clip 1218a (e.g., breaking through the obstruction of the elastic baffles 1212a and 1212b) enters the jaw assembly 1100.

[0039] In some embodiments, the clamping mechanism 1221 is formed by bending a sheet metal strip or by symmetrically connecting two sheet metal strips, thereby providing the required strength, flexibility and elasticity.

[0040] During the process of pushing the ligation clip, not only does the track limit the movement, but the clamping mechanism also clamps the clip, thus avoiding the safety risks of the surgery caused by the accidental detachment of the ligation clip.

[0041] In addition, such as Figure 2As shown, the slider assembly also includes a washer 1226, a third spring 1227, and a second slider 1228. The third slider 1225 is located on the proximal side of the second slider 1228. The third spring 1227 is disposed on the proximal end of the clamping mechanism 1221. In some embodiments, the second slider 1228 is coaxial with the second push rod 1224, and the distal end of the second slider 1228 contacts the proximal end of the third spring 1227, which in turn contacts the washer 1226. The washer 1226 is fixed relative to the sleeve 1217, such that the proximal end of the third spring 1227 is a fixed end. The functions of these components are related to the closing and opening of the jaw assembly, and will be described in further detail in the following sections.

[0042] 2. Handle assembly

[0043] The following is for reference. Figure 6 , Figure 6 This is an exploded view of the handle assembly 1300 according to an exemplary embodiment. Figure 6 As shown, the handle assembly 1300 mainly includes a trigger mechanism 1301, a third push rod 1302, a magnet 1303, a spring washer 1304, a fourth spring 1305, piston cylinders 1306a and 1306b, a first connecting rod 1307, connecting rod wings 1308a and 1308b, a second connecting rod 1309a and 1309b, handle housings 1310a and 1310b, and a hinge pin 1311. Handle housings 1310a and 1310b are mated to form the outer shell of the entire handle assembly 1300. Piston cylinders 1306a and 1306b are mated to form a cylindrical piston cylinder, which can be fixed in the middle of the outer shell. The third push rod 1302, magnet 1303, spring washer 1304, and fourth spring 1305 are coaxially mounted in the piston cylinder. The third push rod 1302 is axially movable within the piston cylinder, and a proximal limiting spring washer 1304 is located on the third push rod 1302. A fourth spring 1305 is mounted between the spring washer 1304 and the bottom of the piston cylinder. The third push rod 1302 is driveably connected to a trigger-type triggering mechanism 1301 via a first connecting rod 1307, connecting rod wings 1308a and 1308b, and second connecting rods 1309a and 1309b (which may be collectively referred to herein as the drive mechanism). The triggering mechanism 1301 is connected to the housing via a hinge pin 1311.

[0044] The following is for reference. Figure 7a and 7b as well as Figure 8a and 8bFigures show a side view and a side sectional view of the handle assembly in its untriggered and triggered states, respectively. As shown, the second link 1309 is fixed to the third push rod 1302 by a second bolt 1312, and the second link 1309 can slide linearly within a groove in the housing. The trigger mechanism 1301 is rotatable relative to the housing via a hinge pin 1311. The first link 1307 is connected to one end of a link wing 1308 by a third bolt 1313, and the other end of the link wing 1308 is connected to the second link 1309 by a fourth bolt 1314.

[0045] like Figure 7a and 7b As shown, no force is applied to rotate the trigger mechanism 1301 at this time, so the handle assembly 1300 is in an untriggered state. In this state, the third push rod 1302 is pushed to the far end in the piston cylinder by the fourth spring 1305 and stops at the left end of the piston cylinder.

[0046] like Figure 8a and 8b As shown, a force is applied to rotate the trigger mechanism 1301, thus putting the handle assembly 1300 in the triggered state. In this state, the rotational motion of the trigger mechanism 1301 is converted into a translational motion of the third push rod 1302 compressing the fourth spring 1305 in the proximal direction within the piston cylinder via the aforementioned transmission mechanism. Once the force applied to the trigger mechanism 1301 disappears, the third push rod 1302 will be reset by the elastic force of the fourth spring 1305.

[0047] Next reference Figure 9 The side cross-sectional view of the handle assembly and barrel assembly is used to explain the interaction between the push assembly 1220 and the third push rod 1302. As mentioned earlier, the barrel assembly 1200 can be connected to the handle assembly 1300, and the sleeve 1217 of the barrel assembly 1200 is coaxial with the third push rod 1302 of the handle assembly 1300. In this embodiment, the third slider 1225 can be an iron block and is in contact with the magnet 1303 at the distal end of the third push rod 1302. Therefore, through the magnetic attraction between the third slider 1225 and the magnet 1303, the translational movement of the third push rod 1302 can produce a push-pull action on the sliding assembly where the third slider 1225 is located, thereby controlling the push assembly 1220 by operating the trigger mechanism 1301. In addition, since the magnetic attraction of magnet 1303 is weak in the direction parallel to the contact surface, the third slider 1225 and magnet 1303 can be disconnected in the direction parallel to the contact surface. This is beneficial for replacing the disposable barrel assembly 1200, so that the handle assembly 1300 can be reused.

[0048] It should be understood that the various components of the aforementioned transmission mechanism and their connection relationships are merely exemplary, and those skilled in the art can certainly conceive of other forms of transmission mechanisms to achieve the same function.

[0049] 3. Jaw assembly

[0050] The following is for reference. Figure 10 and Figures 11a-11c This illustrates the steps of pushing the ligation clip from the barrel assembly into the jaw assembly.

[0051] like Figure 11a As shown, when the farthest ligation clip 1218a is clamped by the clamping mechanism 1221 of the pushing component and pushed through the elastic baffles 1212a and 1212b, the elastic baffles 1212a and 1212b return to their original state to continue blocking the subsequent ligation clip queue, while the ligation clip 1218a enters between the jaws 1110a and 1110b of the jaw assembly 1100.

[0052] like Figure 11b As shown, the clamping mechanism 1221 continues to clamp and push the ligation clip 1218a in the jaw assembly 1100. The jaws 1110a and 1110b are provided with sliding grooves that conform to the shape of the ligation clip as guide rails to prevent the ligation clip 1218a from falling off the jaws 1110a and 1110b.

[0053] like Figure 11c As shown, the front ends of the clamp jaws 1110a and 1110b are provided with perforated grooves 1110(1) for fixing the cylindrical upper and lower locking protrusions 1218(1) of the lip of the ligation clip 1218a. Once the upper and lower locking protrusions 1218(1) of the ligation clip 1218a fall into the perforated grooves 1110(1) of the clamp jaws 1110a and 1110b respectively along the slide, due to the elastic expansion of the ligation clip 1218a itself, the locking protrusions 1218(1) will be locked in the perforated grooves 1110(1), and the ligation clip 1218a can no longer move in this state.

[0054] At this time, the clamping mechanism 1221 completes the task of pushing the ligation clip 1218a. As the third slider 1225 is pulled in the proximal direction, the clamping mechanism 1221 will return to the initial position and return to the released state. At the same time, the next ligation clip 1218b in the storage component 1210 will be located between 1221(1) and 1221(2), waiting for the clamping mechanism 1221 to clamp and push again.

[0055] After the ligation clip is pushed into the jaw assembly, the clamping forceps can be manipulated to close and open the jaws of the jaw assembly, thereby performing the vascular closure procedure. See below for reference. Figure 12a and 12bThis will explain the principle of the closing and opening of the jaws 1110a and 1110b of the jaw assembly 1110.

[0056] As shown in the figure, the jaws 1110a and 1110b are hinged to the throat 1130 via leaf springs 1120a and 1120b, allowing the jaws 1110a and 1110b to rotate relative to the throat 1130. The closing and opening of the jaws 1110a and 1110b are controlled by a first draw wire 1140 and a second draw wire 1150. As shown in the figure, the first draw wire 1140 extends centrally within the jaw assembly 1100 and the barrel assembly 1200, with its distal end forked into two branches to connect to the middle sections of the jaws 1110a and 1110b respectively, and its proximal end connected to a third slider 1225. Two second draw wires 1150 are located above and below the first draw wire 1140, with their distal ends connected to the tails of the jaws 1110a and 1110b respectively, and their proximal ends connected to a second slider 1228. Additionally, as shown in the figure, washer 1226 is limited by two bolts 1229.

[0057] like Figure 12a As shown, if a proximal pulling force is applied to the third slider 1225, the first pull wire 1140 will move proximally together with the third slider 1225, which will cause the jaws 1110a and 1110b to clamp and close in the middle, thereby closing the ligation clamp between them. Simultaneously, the closing of the jaws 1110a and 1110b will cause the second pull wire 1150 to move distally together with the second slider 1228 and compress the third spring 1227.

[0058] like Figure 12b As shown, if a distal-direction thrust is applied to the third slider 1225, the first wire puller 1140 will move distally along with the third slider 1225. Simultaneously, the second slider 1228 is subjected to a proximal-direction elastic force generated by the recovery of the third spring 1227, and the second wire puller 1250 will move proximally along with the second slider 1228, causing the jaws 1110a and 1110b to open.

[0059] The advantage of controlling the opening and closing of the jaws by drawing wire is that the drawing wire occupies little space and is independent of the distance between the point of action and the target, thus reserving space for installing the clamping mechanism according to this application in the barrel assembly.

[0060] Although this application has been described with reference to the foregoing embodiments, those skilled in the art will understand that various changes can be made without departing from the spirit and scope of this application as defined by the appended claims. While this specification contains details of many specific implementations, these should not be construed as limiting the scope of the claims, but rather as descriptions of features specific to particular embodiments. The scope of this application is defined by the appended claims and their equivalents, and is not limited to the embodiments described above.

Claims

1. A clamping pliers, characterized in that, include: Handle assembly; A barrel assembly, the proximal end of which is connected to the handle assembly, and A jaw assembly, the proximal end of which is connected to the distal end of the barrel assembly; The barrel assembly includes: casing; A storage component disposed within the cannula is configured to store multiple ligation clips, and A push assembly disposed within the cannula is configured to push the most distal ligation clip among the plurality of ligation clips into the jaw assembly. The push assembly includes a clamping mechanism comprising a force-receiving portion and a clamping portion. The clamping mechanism is configured to apply force to the force-receiving portion, causing the clamping portion to clamp the most distal ligation clip, thereby moving the most distal ligation clip in a distal direction. The storage component includes: The track, in which the plurality of ligation clips are arranged sequentially along the axial direction of the track, A first push rod is disposed in the track, the distal end of the first push rod abutting against the nearest ligation clip among the plurality of ligation clips, and A first spring, which is sleeved on the first push rod, wherein: The first spring is in a compressed state, and the distal end of the track includes an elastic stop, such that the plurality of ligature clips are held between the elastic stop and the distal end of the first push rod by the elastic force provided by the first spring. The push component also includes: A second spring, the distal end of which is connected to the proximal end of the first push rod. A first slider, the first slider being connected to the proximal end of the second spring, and A sliding component that does not contact the first slider when no force is applied, wherein: The clamping mechanism includes a first force-receiving part and a second force-receiving part. The first force-receiving part is fixed to the first slider, and the second force-receiving part of the clamping mechanism is fixed to the sliding assembly. The pushing assembly is configured as follows: By applying a force to the sliding assembly in the distal direction, the sliding assembly and the second force-receiving part move in the distal direction, and the clamping part gradually clamps the distal ligation clip; and As the sliding assembly moves to contact the first slider and continues to move in the distal direction, the first slider overcomes the elastic force of the second spring and compresses the second spring, causing the first slider and the first force-bearing part to also move in the distal direction, and causing the clamping part to move in the distal direction while clamping the distal ligation clip, until the distal ligation clip is pushed into the jaw assembly.

2. The clamping pliers as described in claim 1, characterized in that, The clamping mechanism is formed by bending a sheet metal strip or by connecting two sheet metal strips symmetrically.

3. The clamping forceps as described in claim 1 or 2, characterized in that, The jaw assembly includes a throat and a pair of jaws, each of the jaws being hinged to the throat such that each of the jaws can be closed and opened relative to the throat.

4. The clamping forceps as described in claim 3, characterized in that, The clamp jaws include grooves that conform to the shape of the ligation clip.

5. The clamping pliers as described in claim 3, characterized in that, The ligation clip includes a protrusion, and the inside of the jaws includes a recess adapted to receive and lock the protrusion.

6. The clamping forceps as described in claim 3, characterized in that, The sliding component includes: Second pusher; A third spring is coaxially disposed with the second push rod, and the third spring is located at the proximal end of the clamping mechanism. A second slider is coaxially arranged with the second push rod, the distal end of the second slider abutting against the proximal end of the third spring; and The third slider is located on the proximal side of the second slider, and The jaw assembly also includes: A first wire, the distal end of which branches to connect to the middle of each of the jaws respectively, and the proximal end of the first wire connecting to the third slider, and A pair of second wires, the distal end of each second wire being connected to the proximal end of each jaw, and the proximal end of each second wire being connected to the second slider; the sliding assembly and the jaw assembly are configured as follows: By applying a force to the third slider in the proximal direction, the first wire moves with the third slider in the proximal direction, causing the jaws to close, and the closing of the jaws causes the second wire to pull the second slider in the distal direction and compress the third spring; and By applying a force to the third slider in the distal direction, the first wire moves with the third slider in the distal direction, while the second wire moves with the second slider in the proximal direction due to the elastic force generated in the proximal direction by the restoration of the third spring, causing the jaws to open.

7. The clamping pliers as described in claim 6, characterized in that, The handle assembly includes: The trigger mechanism is configured to switch between a trigger state and a release state. The third push rod, the distal end of which is connected to the proximal end of the third slider, and The transmission mechanism is configured to convert the triggering and releasing of the triggering mechanism into movement of the third push rod in the distal and proximal directions, thereby applying force to the third slider in the distal and proximal directions.

8. The clamping pliers as described in claim 7, characterized in that, The third slider is magnetic, and the distal end of the third push rod includes a magnet. The connection between the distal end of the third push rod and the proximal end of the third slider is achieved by the magnetic attraction between the third slider and the magnet.

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