A pincer for a dachshund

Abstract

The application relates to a pincer for a havana, belonging to the technical field of medical instruments, which comprises a pincer body, the pincer body comprises a fixed handle, a movable handle, a pipe body and a pull rod, the fixed handle and the pipe body are fixedly connected at one end, the movable handle and the fixed handle are hinged, the pull rod is slidably connected inside the pipe body, the end of the pull rod close to the movable handle is hinged with the movable handle, the end of the pipe body away from the movable handle is fixedly connected with a fixed pincer head, a movable pincer head is arranged on one side of the fixed pincer head, a moving assembly for moving the movable pincer head is arranged at the end of the pull rod close to the fixed pincer head, a clamping body is arranged between the movable pincer head and the fixed pincer head, the clamping body comprises elastic sheets and clamping sheets, the elastic sheets and the clamping sheets are provided with two corresponding elastic sheets and clamping sheets, the two elastic sheets are fixedly connected at one end, the other ends of the elastic sheets are bent away from each other, the clamping sheets and the bent ends of the elastic sheets are fixedly connected, the clamping sheets are in a meandering shape, and the two clamping sheets are overlapped with each other. The application has the effect of improving the use convenience of the pincer for a havana.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a pug clamp. Background Technology

[0002] Pug forceps are widely used in cardiac and small vessel surgeries. During cardiac and small vessel surgeries, pug forceps are needed to clamp blood vessels for coronary artery bypass grafting or small vessel surgery.

[0003] The existing pug clamp includes a clamp body and a clamp body. The clamp body consists of two overlapping curved metal plates, which are hinged at the overlap. An elastic plate is fixed between the tail ends of the two metal plates. A connecting hole is opened through both metal plates. A clamp head is fixedly connected to the front end of the clamp body. Two pins are fixedly connected to the clamp head. Before placing the clamp body into the patient's body, the tail end of the clamp body is placed inside the clamp head, and the two pins of the clamp head are inserted into the connecting holes. By moving the movable handle of the clamp body, the movable handle drives the pull rod inside the clamp body to move. The pull rod drives the clamp head to move, and the clamp head compresses the elastic plate, causing the front ends of the two metal plates to open. Moving the clamp body moves the clamp body to the blood vessel, placing the blood vessel between the two metal plates. Releasing the movable handle allows the clamp head to open, the metal plates to release their elasticity, and the front ends of the two metal plates to move relative to each other, clamping and fixing the blood vessel.

[0004] When removing the clamp, insert the forceps into the clamp and align the pin and connecting hole. Move the movable handle again to close the forceps and open the front end of the metal plate. Move the forceps to remove the clamp from the patient's body.

[0005] Regarding the aforementioned technologies, when the forceps head begins to clamp the clamp body, the forceps head begins to close, and the angle decreases from large to small. During this process, the clamp body is prone to slipping out of the forceps head. At the same time, when removing the clamp body, the pin on the forceps head needs to be aligned with the connecting hole on the clamp body. Since it is inside the patient's body, it is not easy to observe, which leads to alignment difficulties, thus resulting in the inconvenience of using the Pug forceps. Summary of the Invention

[0006] To improve the ease of use of pug pliers, this application provides a pug pliers.

[0007] The pug pliers provided in this application adopt the following technical solution: A type of pug pliers includes a pliers body comprising a fixed handle, a movable handle, a tube body, and a pull rod. The fixed handle and one end of the tube body are fixedly connected. The movable handle and the fixed handle are hinged. The pull rod is located inside the tube body and slidably connected to the tube body. The end of the pull rod near the movable handle is hinged to the movable handle. A fixed jaw head is fixedly connected to the end of the tube body away from the movable handle. The length direction of the fixed jaw head is parallel to the length direction of the tube body. A movable jaw head is provided on one side of the fixed jaw head and is parallel to the fixed jaw head. A moving component that drives the movable jaw head to move is provided at the end of the pull rod near the fixed jaw head. A clamping body is provided between the movable jaw head and the fixed jaw head. The clamping body includes elastic plates and clamping plates. Two elastic plates and two clamping plates are provided and correspond one-to-one. One end of the two elastic plates is fixedly connected to each other, and the other ends of the elastic plates are bent away from each other. The clamping plates are fixedly connected to the bent ends of the elastic plates. The clamping plates are zigzag and the two clamping plates overlap each other.

[0008] By adopting the above technical solution, the elastic plate is elastic, and the pull rod is flexible. The elastic plate is placed between the fixed and movable clamp heads. Pressing the movable handle towards the fixed handle causes the pull rod to move away from the fixed clamp head. The pull rod, through the moving component, moves the movable clamp head towards the fixed clamp head, ensuring the movable and fixed clamp heads remain parallel. The fixed and movable clamp heads push the elastic plate, causing the two elastic plates to abut against each other and remain parallel. The elastic plate causes the two clamping pads to open. Moving the clamp body moves the clamping pads to the blood vessel, and then releasing the movable handle. When the fixed and movable clamp heads open, the elastic plate returns to its original shape, and the front ends of the two clamps move in opposite directions, clamping and fixing the blood vessel. Simultaneously, when removing the clamp, move the clamp body so that the elastic plate is between the movable and fixed clamp heads. Press the movable handle, and the movable clamp head moves towards the fixed clamp head, causing the two clamps to open. Move the clamp body again, removing the clamp from the patient's body. During the clamping process, the fixed and movable clamp heads remain parallel, resulting in better force distribution, eliminating the need for alignment, and preventing slippage, thus improving the ease of use of the Pug clamp.

[0009] Optionally, the moving jaw and the fixed jaw are provided with toothed ridges on opposite sides, and the opposite sides of the bent end of the elastic sheet are provided with toothed ridges, so that the toothed ridges of the moving jaw and the fixed jaw and the toothed ridges of the elastic sheet mesh and match.

[0010] By adopting the above technical solution, during the process of the moving jaw head moving towards the fixed jaw head, the toothed edges on the moving jaw head mesh with the toothed edges on the elastic plate, and the toothed edges on the fixed jaw head mesh with the toothed edges on the elastic plate. This increases the contact area between the fixed jaw head and the moving jaw head and the elastic plate, making it less likely for the elastic plate to slip off between the fixed jaw head and the moving jaw head.

[0011] Optionally, both of the two clamping pieces are provided with toothed ridges on opposite sides of the end away from the elastic piece, and the toothed ridges of the two clamping pieces are meshed together.

[0012] By adopting the above technical solution, after the clip clamps the blood vessel, the toothed ridges on the clips increase the friction between the clips and the blood vessel, thereby improving the stability of the clips clamping the blood vessel.

[0013] Optionally, the moving component includes a first connecting piece and a second connecting piece. One end of the first connecting piece is hinged to the fixed jaw head, and the end of the first connecting piece away from the fixed jaw head is slidably connected to the movable jaw head along the length direction of the movable jaw head. One end of the second connecting piece is hinged to the movable jaw head, and the end of the second connecting piece away from the movable jaw head is slidably connected to the fixed jaw head along the length direction of the fixed jaw head. The end of the pull rod away from the movable handle extends out of the tube body and is connected to the end of the second connecting piece near the fixed jaw head. The first connecting piece and the second connecting piece overlap, and the first connecting piece and the second connecting piece are rotatably connected at the overlap.

[0014] By adopting the above technical solution, the moving handle drives the pull rod to move, the pull rod drives the second connecting piece to move, and the second connecting piece, guided by the first connecting piece, drives the moving jaw head to move towards the fixed jaw head, thus the moving component realizes the function of driving the moving jaw head to move.

[0015] Optionally, the moving pliers head and the fixed pliers head are provided with mounting grooves on opposite sides along their own length direction, and the two ends of the first connecting piece and the second connecting piece are respectively located in the mounting grooves on both sides.

[0016] By adopting the above technical solution, the setting of the mounting groove provides movement space for the folding of the first connecting piece and the second connecting piece, making it less likely for the first connecting piece and the second connecting piece to affect the pressing elastic sheet.

[0017] Optionally, the fixed jaw head has a first sliding groove extending along its length, which is connected to the mounting groove. A first sliding rod is slidably connected to the fixed jaw head within the first sliding groove. The length direction of the first sliding rod is perpendicular to the length direction of the first sliding groove. The first sliding rod passes through the end of the second connecting piece near the fixed jaw head, and the first sliding rod and the second connecting piece are slidably connected. A pull rod is rotatably connected to the end of the fixed jaw head near the first sliding rod. The movable jaw head has a second sliding groove extending along its length, which is connected to the mounting groove of the movable jaw head. A second sliding rod is slidably connected within the second sliding groove. The length direction of the second sliding rod is parallel to the length direction of the first sliding rod. The second sliding rod passes through the end of the first connecting piece at the movable jaw head, and the second sliding rod and the first connecting piece are rotatably connected.

[0018] By adopting the above technical solution, the pull rod drives the first slide rod to move in the first slide groove, the first slide rod drives the second connecting piece to move, and the second connecting piece, guided by the first connecting piece, drives the moving jaw head to move towards the fixed jaw head. At the same time, the first connecting piece drives the second slide rod to move in the second slide groove. Through the setting of the first slide rod and the second slide rod, the sliding connection between the second connecting piece and the fixed jaw head and the sliding connection between the first connecting piece and the moving jaw head are realized.

[0019] Optionally, baffles are fixedly connected to both sides of the fixed jaw and the moving jaw, and the baffles connecting the fixed jaw and the moving jaw are offset from each other.

[0020] By adopting the above technical solution, when the elastic sheet is between the fixed jaw head and the moving jaw head, the baffle blocks the elastic sheet, making it difficult for the elastic sheet to slip out between the fixed jaw head and the moving jaw head.

[0021] Optionally, a telescopic plate is provided between the fixed jaw head and the moving jaw head. The telescopic plate is composed of multiple plates that are sleeved together and slidably connected. The opposite ends of the telescopic plate extend to the fixed jaw head and the moving jaw head respectively and are slidably connected to them. The telescopic plate is located on the side of the moving component away from the tube body.

[0022] By adopting the above technical solution, during the process of moving the elastic piece between the moving jaw head and the stationary jaw head, the telescopic plate blocks the elastic piece, making it difficult for the elastic piece to extend to the first connecting piece and the second connecting piece and affect the folding of the first connecting piece and the second connecting piece.

[0023] Optionally, the fixed clamp head and the movable clamp head each have a moving groove on their respective sides along their own length direction, and the opposite ends of the telescopic plate are respectively located in the moving groove. Both the fixed clamp head and the movable clamp head are slidably connected to the telescopic plate.

[0024] By adopting the above technical solution, when the fixed clamp head and the moving clamp head abut, the telescopic plate is in a retracted state, and both ends of the telescopic plate are respectively in the moving grooves on both sides. Thus, the setting of the moving grooves makes it less likely for the telescopic plate to affect the pressing elastic sheet.

[0025] Optionally, rollers are rolled at the fixed connection point of the two elastic sheets.

[0026] By adopting the above technical solution, the elastic plate extends between the fixed jaw head and the moving jaw head. When the roller and the telescopic plate come into contact, the telescopic plate drives the roller to roll during the extension and retraction process. Thus, the setting of the roller is not likely to affect the extension and retraction of the telescopic plate.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. By pressing the handle, the handle moves the lever, which in turn moves the moving jaw head toward the fixed jaw head via the moving component. The fixed jaw head and the moving jaw head press against the elastic plate, which in turn causes the clamping plates on both sides to open. During the clamping process, the fixed jaw head and the moving jaw head are always in a parallel state, resulting in better force distribution, no need for alignment, and less slippage, thus improving the convenience of using the pug pliers. 2. By setting up the first and second slide rods, the linkage between the pull rod and the moving component is realized; 3. The baffle design prevents the elastic plate from slipping between the stationary and moving jaws. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a pug clamp according to an embodiment of this application; Figure 2 This is a schematic diagram illustrating the structure of the clamp in the embodiments of this application; Figure 3 This is a cross-sectional view of the clamp body in the embodiment of this application; Figure 4 This is a schematic diagram illustrating the structure of the moving pliers head in the embodiments of this application.

[0029] In the diagram, 1. clamp body; 11. fixed handle; 12. movable handle; 13. tube body; 14. pull rod; 2. fixed clamp head; 21. first slide groove; 22. first slide rod; 3. movable clamp head; 31. second slide groove; 32. second slide rod; 4. moving assembly; 41. first connecting piece; 42. second connecting piece; 5. clamp body; 51. elastic piece; 52. clamping piece; 521. roller; 6. placement groove; 7. baffle; 8. telescopic plate; 9. moving groove. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0031] This application discloses a pug clamp.

[0032] refer to Figure 1 A pug clamp includes a clamping body 5, which includes an elastic sheet 51 and a clamping piece 52. There are two elastic sheets 51 and two clamping pieces 52, and they correspond one to one. One end of the two elastic sheets 51 is fixedly connected, and the other end of the two elastic sheets 51 is bent in opposite directions. The bent end of the elastic sheet 51 is fixedly connected to the clamping piece 52. The two clamping pieces 52 are bent and overlap each other. In this embodiment, the elastic sheet 51 is made of metal.

[0033] When the elastic sheet 51 is pressed against the bent portion, the elastic sheet 51 causes the two clips 52 to open, moving the clips 52 to the blood vessel and positioning them at the ends away from the elastic sheet 51. The pressing on the elastic sheet 51 is then released, and the bent portion of the elastic sheet 51 is released and moves in opposite directions. The elastic sheet 51 causes the clips 52 to move, so that the front ends of the clips 52 move in opposite directions, and the clips 52 clamp and fix the blood vessel.

[0034] refer to Figure 2 The two clips 52 have serrations on their opposite sides along their length, away from the elastic plate 51. After the clips 52 clamp and fix the blood vessel, the serrations increase the friction between the clips 52 and the blood vessel, making it less likely for the blood vessel to slip out of the clips 52 on both sides.

[0035] refer to Figure 1 and Figure 3 A clamp body 1 is provided on one side of the clamp body 5. The clamp body 1 includes a fixed handle 11, a movable handle 12, a tube body 13 and a pull rod 14. The movable handle 12 is located on the side of the fixed handle 11 away from the clamp body 5. The upper end of the movable handle 12 is hinged to the upper end of the fixed handle 11. The fixed handle 11 and the tube body 13 are fixedly connected. The pull rod 14 is disposed inside the tube body 13. The length direction of the pull rod 14 is parallel to the tube body 13. The end of the pull rod 14 near the movable handle 12 extends to the outside of the tube body 13 and is hinged to the upper end of the movable handle 12. In this embodiment, the pull rod 14 has bendability.

[0036] Press the lower end of the moving handle 12 toward the fixed handle 11, and the upper end of the moving handle 12 will rotate away from the fixed handle 11, causing the moving handle 12 to move the pull rod 14.

[0037] refer to Figure 3 and Figure 4 A fixed clamp head 2 is fixedly connected to one end of the tube body 13 away from the fixed handle 11. The length direction of the fixed clamp head 2 is parallel to the length direction of the tube body 13. A movable clamp head 3 is provided directly below the fixed clamp head 2. The movable clamp head 3 is parallel to the fixed clamp head 2. A moving component 4 is provided at the fixed clamp head 2 to drive the movable clamp head 3 to move toward the fixed clamp head 2.

[0038] The fixed jaw head 2 and the movable jaw head 3 each have a mounting groove 6 along their own length on opposite sides. The moving component 4 includes a first connecting piece 41 and a second connecting piece 42. One end of the first connecting piece 41 is located in the mounting groove 6 of the fixed jaw head 2 away from the tube body 13 and is hinged to the fixed jaw head 2. The end of the first connecting piece 41 away from the fixed jaw head 2 extends into the mounting groove 6 of the movable jaw head 3 near the tube body 13 and is slidably connected to the movable jaw head 3. One end of the second connecting piece 42 is located in the mounting groove 6 of the movable jaw head 3 away from the tube body 13 and is hinged to the movable jaw head 3. The end of the second connecting piece 42 away from the movable jaw head 3 extends into the mounting groove 6 of the fixed jaw head 2 near the tube body 13 and is slidably connected to the fixed jaw head 2. The second connecting piece 42 overlaps with the first connecting piece 41, and the first connecting piece 41 and the second connecting piece 42 are rotatably connected at the overlap. The end of the pull rod 14 away from the fixed handle 11 extends outside the tube body 13 and is connected to the end of the second connecting piece 42 inside the fixed jaw head 2.

[0039] As the pull rod 14 moves toward the fixed handle 11, the pull rod 14 causes one end of the second connecting piece 42 inside the fixed jaw head 2 to slide along the length of the placement groove 6. Under the guidance of the first connecting piece 41, the second connecting piece 42 causes the movable jaw head 3 to move toward the fixed jaw head 2. At the same time, the end of the first connecting piece 41 inside the movable jaw head 3 slides in the placement groove 6. When the movable handle 12 is released, the movable handle 12 returns to its original position, causing the pull rod 14 to move. The pull rod 14 causes the first connecting piece 41 to move, so that the movable jaw head 3 returns to its original position.

[0040] refer to Figure 2 and Figure 4 The bent portion of the elastic sheet 51 has toothed ribs on opposite sides. The fixed jaw head 2 and the movable jaw head 3, on opposite sides away from the tube body 13, have toothed ribs along their own length. The toothed ribs of the movable jaw head 3 and the fixed jaw head 2 are meshed with the gears of the elastic sheet 51.

[0041] The elastic plate 51 is placed between the movable forceps head 3 and the fixed forceps head 2. As the movable forceps head 3 moves toward the fixed forceps head 2, it pushes the bent part of the elastic plate 51 toward the fixed forceps head 2. The teeth of both the movable forceps head 3 and the fixed forceps head 2 mesh with the gears of the elastic plate 51, increasing the contact area between the movable forceps head 3 and the fixed forceps head 2 and the elastic plate 51. This makes it less likely for the elastic plate 51 to slip out between the movable forceps head 3 and the fixed forceps head 2. At the same time, the movable forceps head 3 and the fixed forceps head 2 clamp and fix the two elastic plates 51, and the elastic plates 51 tend to be horizontal. The two clamping plates 52 open. After the movable forceps head 3 returns to its original position, the elastic plate 51 returns to its bent shape, causing the clamping plate 52 to move away from the end of the elastic plate 51 and clamp and fix the blood vessel.

[0042] refer to Figure 3 and Figure 4 The fixed clamp head 2 has a first sliding groove 21 extending along its length from one end near the tube body 13. The first sliding groove 21 is connected to the placement groove 6. The fixed clamp head 2 is slidably connected to a first sliding rod 22 within the first sliding groove 21. The length direction of the first sliding rod 22 is perpendicular to the length direction of the fixed clamp head 2. The first sliding rod 22 passes through a second connecting piece 42 and is rotatably connected to the second connecting piece 42 at one end. The pull rod 14 extends into the placement groove 6 from one end near the fixed clamp head 2 and is rotatably connected to the first sliding rod 22. The movable clamp head 3 has a second sliding groove 31 extending along its length from one end near the tube body 13. The second sliding groove 31 is connected to the placement groove 6. The movable clamp head 3 is slidably connected to a second sliding rod 32 within the second sliding groove 31. The length direction of the second sliding rod 32 is perpendicular to the length direction of the movable clamp head 3. The second sliding rod 32 passes through a first connecting piece 41 and is rotatably connected to the first connecting piece 41 at one end.

[0043] Pull rod 14 drives the first slide rod 22 to move, the first slide rod 22 drives the first connecting piece 41 to move, and at the same time the second connecting piece 42 drives the second slide rod 32 to move in the second slide groove 31. The arrangement of the first slide rod 22 and the second slide rod 32 realizes the sliding connection between the first connecting piece 41 and the moving pliers head 3, and the sliding connection between the second connecting piece 42 and the fixed pliers head 2.

[0044] refer to Figure 2 and Figure 4Both the fixed jaw head 2 and the movable jaw head 3 are fixedly connected to baffles 7 on opposite sides. The moving directions of the baffles 7 and the movable jaw head 3 are parallel, and the baffles 7 connected to the fixed jaw head 2 and the movable jaw head 3 are staggered. When the elastic piece 51 is between the movable jaw head 3 and the fixed jaw head 2, the baffles 7 block the elastic piece 51, making it difficult for the elastic piece 51 to slip out between the movable jaw head 3 and the fixed jaw head 2.

[0045] refer to Figure 2 and Figure 4 Both the fixed jaw head 2 and the movable jaw head 3 have a moving groove 9 on their respective sides along their length. The moving groove 9 is located on the side of the mounting groove 6 away from the tube body 13. A telescopic plate 8 is provided between the fixed jaw head 2 and the movable jaw head 3. The telescopic plate 8 is composed of multiple plates that are sleeved together and slidably connected. The length direction of the telescopic plate 8 is perpendicular to that of the fixed jaw head 2. The opposite ends of the telescopic plate 8 extend into the moving grooves 9 on both sides. The end of the telescopic plate 8 in the moving groove 9 of the fixed jaw head 2 is slidably connected to the fixed jaw head 2. The end of the telescopic plate 8 in the moving groove 9 of the movable jaw head 3 is slidably connected to the movable jaw head 3. Two elastic plates 51 are fixedly connected to each other, and a roller 521 is rolled at one end.

[0046] During the process of the moving jaw head 3 moving towards the fixed jaw head 2 to press the elastic sheet 51, the elastic sheet 51 tends to extend towards the baffle 7, causing the roller 521 to abut against the baffle 7. At the same time, the telescopic plate 8 retracts and blocks the elastic sheet 51, making it difficult for the elastic sheet 51 to extend between the first connecting piece 41 and the second connecting piece 42. The setting of the roller 521 makes it difficult for the elastic sheet 51 to affect the extension and retraction of the telescopic plate 8.

[0047] The implementation principle of a pug forceps according to an embodiment of this application is as follows: Pressing the lower end of the moving handle 12 towards the fixed handle 11 causes the upper end of the moving handle 12 to move the pull rod 14 away from the tube body 13. The pull rod 14, through the moving component 4, moves the moving forceps head 3 towards the fixed forceps head 2, and the moving forceps head 3 and the fixed forceps head 2 remain parallel. During the movement of the moving forceps head 3, the elastic sheet 51 is pressed, causing the elastic sheet 51 to tend towards a straight line. The elastic sheet 51 causes the clamping plate 52 to open, moving the forceps body 1 so that the clamping plate 52 is positioned at the blood vessel, with the blood vessel between the two clamping plates 52. Releasing the moving handle 12 causes it to return to its original position, and simultaneously the elastic sheet 51 returns to its bent state, causing the clamping plate 52 to clamp and fix the blood vessel. The fixed forceps head 2 and the moving forceps head 3 remain parallel, resulting in better force distribution, no need for alignment, and less slippage, thereby improving the convenience of using the pug forceps.

[0048] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pair of pug pliers, comprising a plier body (1), the plier body (1) comprising a fixed handle (11), a movable handle (12), a tube body (13), and a pull rod (14), wherein the fixed handle (11) and one end of the tube body (13) are fixedly connected, the movable handle (12) and the fixed handle (11) are hinged, the pull rod (14) is located inside the tube body (13) and slidably connected to the tube body (13), and the end of the pull rod (14) near the movable handle (12) is hinged to the movable handle (12), characterized in that: The tube body (13) is fixedly connected to a fixed clamp head (2) at the end away from the moving handle (12). The length direction of the fixed clamp head (2) is parallel to the length direction of the tube body (13). A moving clamp head (3) is provided on one side of the fixed clamp head (2). The moving clamp head (3) is parallel to the fixed clamp head (2). A moving component (4) that drives the moving clamp head (3) to move is provided at the end of the pull rod (14) near the fixed clamp head (2). A clamp body (5) is provided between the moving clamp head (3) and the fixed clamp head (2). The clamp body (5) includes an elastic sheet (51) and a clamping piece (52). There are two elastic sheets (51) and two clamping pieces (52) that correspond to each other. One end of the two elastic sheets (51) is fixedly connected to each other. The other end of the elastic sheets (51) is bent away from each other. The clamping piece (52) is fixedly connected to the bent end of the elastic sheet (51). The clamping piece (52) is curved and the two clamping pieces (52) overlap each other. The moving component (4) includes a first connecting piece (41) and a second connecting piece (42). One end of the first connecting piece (41) is hinged to the fixed jaw head (2). The end of the first connecting piece (41) away from the fixed jaw head (2) is slidably connected to the moving jaw head (3) along the length of the moving jaw head (3). One end of the second connecting piece (42) is hinged to the moving jaw head (3). The end of the second connecting piece (42) away from the moving jaw head (3) is slidably connected to the fixed jaw head (2) along the length of the fixed jaw head (2). The end of the pull rod (14) away from the moving handle (12) extends to the outside of the tube body (13) and is connected to the end of the second connecting piece (42) near the fixed jaw head (2). The first connecting piece (41) and the second connecting piece (42) overlap and are rotatably connected at the overlap.

2. The pug pliers according to claim 1, characterized in that: The moving jaw (3) and the fixed jaw (2) are provided with toothed ridges on opposite sides, and the opposite sides of the bent end of the elastic plate (51) are provided with toothed ridges. The toothed ridges of the moving jaw (3) and the fixed jaw (2) and the toothed ridges of the elastic plate (51) are meshed and matched.

3. The pug pliers according to claim 1, characterized in that: Both of the two clamping pieces (52) have toothed ridges on opposite sides of the end away from the elastic piece (51), and the toothed ridges of the two clamping pieces (52) are meshed together.

4. The pug pliers according to claim 1, characterized in that: The moving pliers (3) and the fixed pliers (2) are provided with mounting grooves (6) on their opposite sides along their own length direction, and the two ends of the first connecting piece (41) and the second connecting piece (42) are respectively located in the mounting grooves (6) on both sides.

5. A pug pliers according to claim 4, characterized in that: The fixed clamp head (2) has a first sliding groove (21) extending along its length. The first sliding groove (21) is connected to the mounting groove (6). The fixed clamp head (2) is slidably connected to a first sliding rod (22) within the first sliding groove (21). The length direction of the first sliding rod (22) is perpendicular to the length direction of the first sliding groove (21). The first sliding rod (22) passes through the second connecting piece (42) near one end of the fixed clamp head (2). The first sliding rod (22) and the second connecting piece (42) are slidably connected. The pull rod (14) is close to the fixed clamp head (2). One end is rotatably connected to the first slide rod (22), and the moving pliers head (3) is provided with a second slide groove (31) along its own length direction. The second slide groove (31) is connected to the mounting groove (6) of the moving pliers head (3). A second slide rod (32) is slidably connected in the second slide groove (31). The length direction of the second slide rod (32) is parallel to the length direction of the first slide rod (22). The second slide rod (32) passes through the end of the first connecting piece (41) located at the moving pliers head (3). The second slide rod (32) and the first connecting piece (41) are rotatably connected.

6. The pug pliers according to claim 1, characterized in that: Both sides of the fixed jaw (2) and the moving jaw (3) are fixedly connected with baffles (7), and the baffles (7) connecting the fixed jaw (2) and the moving jaw (3) are misaligned.

7. The pug pliers according to claim 1, characterized in that: A telescopic plate (8) is provided between the fixed clamp head (2) and the movable clamp head (3). The telescopic plate (8) is composed of multiple plates connected together and slidably connected. The two ends of the telescopic plate (8) extend to the fixed clamp head (2) and the movable clamp head (3) respectively and are slidably connected to them. The telescopic plate (8) is located on the side of the moving component (4) away from the tube body (13).

8. A pug pliers according to claim 7, characterized in that: The fixed clamp head (2) and the movable clamp head (3) are provided with a moving groove (9) on their respective sides along their own length direction. The two ends of the telescopic plate (8) are respectively located in the moving groove (9). Both the fixed clamp head (2) and the movable clamp head (3) are slidably connected to the telescopic plate (8).

9. A pug pliers according to claim 8, characterized in that: Rollers (521) are tumbling connected at the fixed connection of the two elastic sheets (51).

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