A clip applier with good rotation flexibility

Abstract

This utility model discloses a clamping pliers with good rotational flexibility, including a clamp bar assembly, a clamp head assembly, and an operating handle assembly. The clamp bar assembly includes an outer tube and a core rod inserted inside the outer tube. The clamp head assembly includes two clamp heads hinged to the left end of the core rod. The operating handle assembly includes a grip and a pull handle. The grip is fixedly installed at the right end of the outer tube, and the right end of the outer tube has a guide groove penetrating both side walls. The pull handle is detachably installed at the right end of the core rod, and the outer end of the pull handle extends movably through the left end of the guide groove to the outside of the outer tube. An elastic element is inserted inside the right end of the outer tube, axially elastically pressing against the right end of the core rod. The two clamp heads are exposed outside the left end of the outer tube in an open state. The clamping and firing operation of the two clamp heads can be flexibly controlled with one hand, and the two clamp heads can be rotated at any angle to adapt the height of the ligation clip to the tissue to be clamped. It is easy to disassemble and install, and convenient for later cleaning and maintenance. The overall structure is simple, lightweight, and flexible.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a clamp with good rotational flexibility. Background Technology

[0002] Clip clamps are key auxiliary instruments in clinical laparoscopic surgery, primarily used to grasp and release ligation clips to effectively ligate blood vessels, bile ducts, and other fluid-carrying vessels within the body. During surgical procedures, a clear surgical field is crucial for accurate manipulation by the surgeon. If excessive bleeding impairs observation, ligation of ruptured blood vessels is necessary to control the bleeding. Using clip clamps in conjunction with ligation clips for hemostasis has become a widely used technique in both open and minimally invasive surgeries. Hemostasis, as a core component of basic surgical procedures, permeates almost all surgical processes; therefore, clip clamps are an indispensable accessory during ligation clip application, and their effectiveness directly affects the reliability and safety of the ligation procedure.

[0003] With the increasing use of ligation clips in clinical practice, the market demand for clamping forceps is growing. Currently, most clamping forceps on the market are non-detachable, with a gun-like structure. During clamping, the handle assembly must be held by hand, and the clamp head assembly is closed by moving the movable handle towards the fixed handle. Since the handle assembly is not easily operable, a rotary knob is installed on the proximal outer side of the clamp bar assembly. Correspondingly, a rotation angle mechanism is installed inside the clamp bar assembly to control the rotation angle of the clamp head assembly by turning the knob. Therefore, most clamping forceps on the market have a complex overall structure, are heavy, inconvenient for subsequent disassembly and cleaning, and lack flexibility in rotation angle. The operation process is complicated, requiring the use of a rotary knob to control the rotation angle of the clamp head assembly. This invention proposes a clamping forceps with better rotational flexibility to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a clamping clamp with good rotational flexibility. The right end of the core rod, which is inserted inside the outer sleeve, is axially elastically abutted against the right end of the outer sleeve through an elastic element. A handle is installed at the right end of the outer sleeve, and a pull handle installed at the right end of the core rod extends to the outside of the outer sleeve through the left end of the guide groove on the outer sleeve. During use, the movement of the outer sleeve towards the clamping head assembly can be flexibly controlled with one hand. During this process, the outer sleeve moves to the left and gradually drives the two clamping heads to close, thereby realizing the clamping and firing operation of the ligation clamp installed in the jaws between the two clamping heads. After the handle is released, the outer sleeve automatically moves to the right to reset under the elastic restoring force of the elastic element. During the operation, the clamping head assembly can be rotated at any angle to make the height of the ligation clamp match the tissue to be clamped, thereby helping to improve the success rate of ligation operation. The pull handle can be removed from the core rod, and the core rod and elastic element can be pulled out from inside the outer sleeve for easy cleaning and maintenance. The overall structure is simple, lightweight, flexible, and highly practical.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a clamp with good rotational flexibility, including a clamp bar assembly, a clamp head assembly installed at the left end of the clamp bar assembly, and an operating handle assembly installed at the right end of the clamp bar assembly. The clamp head assembly includes two clamp heads that can be opened and closed. The clamp bar assembly includes an outer tube and a core rod that is movably inserted inside the outer tube. The two clamp heads are hinged to the left end of the core rod. The operating handle assembly includes a grip and a pull handle. The grip is fixedly installed at the right end of the outer tube. The right end of the outer tube has a guide groove that runs longitudinally through its upper and lower side walls. The pull handle is detachably installed at the right end of the core rod, and the outer end of the pull handle moves through the left end of the guide groove and extends to the outside of the outer tube. An elastic element that axially elastically abuts against the right end of the core rod is inserted inside the right end of the outer tube, and the two clamp heads are exposed outside the left end of the outer tube in an open state.

[0006] This utility model discloses a clamping pliers with good rotational flexibility. The right end of the core rod, which is inserted inside the outer sleeve, is axially elastically abutted against the right end of the outer sleeve through an elastic element. A handle is installed at the right end of the outer sleeve, and a pull handle installed at the right end of the core rod extends to the outside of the outer sleeve through the left end of the guide groove on the outer sleeve. During use, the movement of the outer sleeve towards the clamping head assembly can be flexibly controlled with one hand. During this process, the outer sleeve moves to the left and gradually drives the two clamping heads to close, thereby realizing the clamping and firing operation of the ligation clip installed in the jaws between the two clamping heads. After releasing the handle, the outer sleeve automatically moves to the right to reset under the elastic restoring force of the elastic element. During operation, the clamping head assembly can be rotated at any angle to adapt the height of the ligation clip to the tissue to be clamped, thereby helping to improve the success rate of ligation operation. The pull handle can be removed from the core rod, allowing the core rod and elastic element to be pulled out from inside the outer sleeve for easy cleaning and maintenance. The overall structure is simple in design, lightweight, flexible, and highly practical.

[0007] A preferred technical solution is that the handle includes a first handle, a second handle, and several screws. The first handle has an arm plate at one end, and the free end of the arm plate has several mounting holes three through the plate. The second handle has a cavity with an opening facing one end, and the second handle also has several threaded holes through a set of side walls of the cavity. The right end of the core rod has a mounting groove that perpendicularly penetrates its axial center line. The free end of the arm plate passes through the mounting groove and is inserted into the cavity of the second handle. The free end of the arm plate and the second handle are fixedly connected together by screws that pass through the corresponding mounting holes three and threaded holes on both handles. One of the first handle and the second handle extends from the left end of the upper port of the guide groove to the upper outside of the outer sleeve, and the other of the first handle and the second handle extends from the left end of the lower port of the guide groove to the lower outside of the outer sleeve. The handle consists of handle one and handle two connected together by the arm plate and the cavity and then fixed and locked together with screws. When the clamp needs to be cleaned or maintained, simply remove the screws and take off the handle to disassemble the core rod and elastic element from the inside of the outer tube, so as to facilitate the cleaning, inspection or replacement of each component. After completion, the components can be reassembled. The disassembly and installation are highly operable and efficient.

[0008] A further preferred technical solution includes a mounting rod extending along the axial length direction at the right end of the core rod. The outer circumferential side of the core rod has several circular bosses extending radially outward along the axial length direction. The outer diameter of both the mounting rod and the circular bosses is slightly smaller than the inner diameter of the outer sleeve. The mounting groove is formed on the mounting rod along the axial centerline. The fact that the outer diameter of both the mounting rod and the circular bosses is slightly smaller than the inner diameter of the outer sleeve ensures excellent smoothness and stability during axial reciprocating motion of the core rod within the outer sleeve. The outer diameter of the mounting rod is larger than the outer diameter of the core rod, ensuring good structural strength even after the mounting groove is formed on the mounting rod, thus contributing to a longer overall service life of the core rod.

[0009] A preferred technical solution is that the grip is a rotating structure, a connecting pipe is coaxially welded and fixed to the right end of the outer sleeve, the left end of the connecting pipe has a circular groove with an opening facing the left, the right end of the connecting pipe passes through and is welded and fixed inside the center hole of the grip, the right end of the connecting pipe has a through hole that communicates with the bottom of the circular groove, and the inner diameter of the through hole is less than the inner diameter of the circular groove, the left port of the circular groove communicates with the right end of the inner cavity of the outer sleeve, the right end of the elastic element is inserted and installed inside the circular groove, and the right end of the elastic element abuts against the bottom of the circular groove and the left end abuts against the right end face of the core rod. The handle is designed as a rotating structure, so that the operating handle assembly is well-suited to the operator's palm when rotating the clamp at any angle, further improving the rotational flexibility and applicability of the clamp of this utility model; the right end of the outer tube is welded and fixedly connected to the handle through a connecting pipe, which is highly feasible in terms of process; the inside of the right end of the connecting pipe has a through hole that penetrates the bottom of the circular groove, so that cleaning liquid or disinfectant is not easily accumulated inside the right end of the outer tube, further improving the convenience and efficiency of cleaning, disinfecting and drying the outer tube.

[0010] A further preferred technical solution includes a grip comprising an inner metal core and an outer plastic coating. The right end of the connecting tube passes through and is welded and fixed inside the central hole of the metal core. The elastic element is a spring. The inner metal core improves the ease of operation when the right end of the outer tube is fixedly connected to it, the plastic coating improves the comfort of gripping, and the spring, being a versatile and readily available material, ensures the successful manufacture and implementation of the clamping pliers of this invention.

[0011] A preferred technical solution also includes a connecting flat rod extending along the axial length at the left end of the core rod. The free end of the connecting flat rod has a mounting hole (I) penetrating both the front and rear sides. A pin passes through the mounting hole (I), and both ends of the pin extend to the outside of the free end of the connecting flat rod. Each of the two pliers has a mounting hole (II) at its right end. One pliers' right end is rotatably fitted onto the front end of the pin through the mounting hole (II), and the other pliers' right end is rotatably fitted onto the rear end of the pin through the mounting hole (II). Each end of the pin has an elastic component for keeping the two pliers open. The hinged mounting method of the two pliers at the left end of the core rod is simple and highly feasible for application.

[0012] A further preferred technical solution includes: the front and rear sides of the free end of the connecting flat rod also have a "9"-shaped countersunk groove coaxially located at both ends of the mounting hole; the right ends of both clamp heads have ear plates in the vertical direction; the ear plates have mounting holes that penetrate the plate body; the side of the ear plate facing the connecting flat rod has a "9"-shaped countersunk groove corresponding to the inner end of the mounting hole; both ends of the pin are respectively sleeved with a torsion spring located between the free end of the connecting flat rod and the corresponding ear plate; the torsion spring is embedded in the mounting cavity formed by a set of corresponding "9"-shaped countersunk grooves and "9"-shaped countersunk grooves; one end of the torsion spring is engaged with the end groove of the "9"-shaped countersunk groove and the other end is engaged with the end groove of the "9"-shaped countersunk groove; a set of corresponding "9"-shaped countersunk grooves, "9"-shaped countersunk grooves and torsion springs constitute a set of the elastic components. The elastic component has a clever and reasonable structural design. The two clamps can maintain a stable open state in the initial state, thus ensuring that the ligation clip can be accurately grasped during the ligation operation.

[0013] A further preferred technical solution includes a countersunk groove three on the side of one of the clamp heads facing away from the connecting flat rod, located at the outer end of the corresponding mounting hole two. One end of the pin has an end cap, which is correspondingly embedded in the countersunk groove three. The other end of the pin passes through and is welded to the mounting hole two on the other clamp head. The assembly method of the pin and the two clamp heads is simple, ensuring good stability and high reliability of the two clamp heads hinged at the left end of the core rod, while also ensuring smooth operation of the two clamp heads during opening or closing.

[0014] A further preferred technical solution includes an arc-shaped notch on the upper and lower sides of the left edge of the outer sleeve, with one of the clamp heads on the upper side corresponding to the arc-shaped notch, and the other on the lower side corresponding to the arc-shaped notch. During clamping, after the right ends of the two clamp heads move a certain distance inside the left end of the outer sleeve, the bottom edges of the two arc-shaped notches begin to drive the two clamp heads to gradually close, effectively reducing the resistance during the process of the left edge of the outer sleeve driving the two clamp heads closer to each other, and further improving the smoothness of the clamping operation.

[0015] A further preferred technical solution includes clamping grooves extending along the left-right length direction and corresponding positioning grooves located at the left ends of the side walls of the clamping grooves on the mating surfaces of the two clamping heads. During the clamping process of the clamping head assembly, the two clamping arms of the ligation clip are embedded in the clamping grooves on the corresponding clamping heads, and the positioning cylinders at the ends of the clamping arms are embedded in the corresponding positioning grooves. This improves the installation stability of the ligation clip at the clamping jaw position and helps to increase the success rate of the clamping operation on the first attempt. During clamping, the corresponding clamping grooves on the two clamping heads form a ligation clip cavity after closing, and the corresponding positioning grooves form a positioning cylinder cavity, improving the stability of the ligation clip closing process and helping to increase the success rate of the ligation operation on the first attempt.

[0016] The advantages and beneficial effects of this utility model are as follows:

[0017] 1. This utility model provides a flexible clamping clamp with good rotational flexibility. The right end of the core rod, which is inserted inside the outer sleeve, is axially elastically abutted against the right end of the outer sleeve through an elastic element. A handle is installed at the right end of the outer sleeve, and a pull handle installed at the right end of the core rod extends to the outside of the outer sleeve through the left end of the guide groove on the outer sleeve. During use, the movement of the outer sleeve towards the clamping head assembly can be flexibly controlled with one hand. During this process, the outer sleeve moves to the left and gradually drives the two clamping heads to close, thereby realizing the clamping and firing operation of the ligation clamp installed in the jaws between the two clamping heads. After the handle is released, the outer sleeve automatically moves to the right to reset under the elastic restoring force of the elastic element. During operation, the clamping head assembly can be rotated at any angle to adapt the height of the ligation clamp to the tissue to be clamped, thereby helping to improve the success rate of ligation operation. The pull handle can be removed from the core rod, allowing the core rod and elastic element to be pulled out from inside the outer sleeve for easy cleaning and maintenance. The overall structure is simple, lightweight, flexible, and highly practical.

[0018] 2. The handle consists of handle one and handle two connected together by the arm plate and the cavity and then fixed and locked together with screws. When the clamp needs to be cleaned or maintained, simply remove the screws and take off the handle to disassemble the core rod and elastic element from the inside of the outer tube, so as to facilitate the cleaning, inspection or replacement of each component. After completion, the components can be reassembled. The disassembly and installation are highly operable and efficient.

[0019] 3. The outer diameter of the mounting rod and the outer diameter of the circular boss are both slightly smaller than the inner diameter of the outer sleeve, ensuring excellent smoothness and stability when the core rod moves axially back and forth inside the outer sleeve; the outer diameter of the mounting rod is larger than the outer diameter of the core rod, ensuring good structural strength even after the mounting groove is opened on the mounting rod, which helps to improve the overall service life of the core rod.

[0020] 4. The handle is designed as a rotating structure, so that the operating handle assembly is well-suited to the operator's palm when rotating the clamp at any angle, further improving the rotational flexibility and applicability of the clamp of this utility model; the right end of the outer tube is welded and fixedly connected to the handle through a connecting pipe, which is highly feasible in terms of process; the inside of the right end of the connecting pipe has a through hole that penetrates the bottom of the circular groove, so that cleaning liquid or disinfectant is not easily accumulated inside the right end of the outer tube, further improving the convenience and efficiency of cleaning, disinfecting and drying the outer tube.

[0021] 5. The metal core inside the handle improves the ease of operation when the right end of the outer tube is fixedly connected to it, the plastic coating layer improves the comfort of gripping, and the elastic element is a spring, which has good versatility and is readily available in the market, ensuring that the clamping pliers of this utility model can be successfully prepared and implemented.

[0022] 6. One of the clamp heads has a countersunk groove three on the side opposite to the connecting flat rod, located at the outer end of the corresponding mounting hole two. One end of the pin has an end cap, which is correspondingly embedded in the countersunk groove three. The other end of the pin passes through and is welded to the mounting hole two on the other clamp head. The assembly method of the pin and the two clamp heads is simple, ensuring good stability and high reliability of the two clamp heads hinged at the left end of the core rod, while also ensuring smooth operation of the two clamp heads during opening or closing.

[0023] 7. The outer sleeve has an arc-shaped notch on both the upper and lower sides of its left end edge. One of the clamping heads on the upper side corresponds to the arc-shaped notch on the upper side, and the other on the lower side corresponds to the arc-shaped notch on the lower side. During clamping, after the right ends of the two clamping heads move a certain distance inside the left end of the outer sleeve, the bottom edges of the two arc-shaped notches begin to drive the two clamping heads to gradually close. This effectively reduces the resistance during the process of the left end edge of the outer sleeve driving the two clamping heads closer together, further improving the smoothness of the clamping operation. Attached Figure Description

[0024] Figure 1 This is a perspective view of a clamp with good rotational flexibility according to this utility model.

[0025] Figure 2 This is a longitudinal sectional view along the axial centerline of a clamping pliers with good rotational flexibility (the pliers head assembly is in an open state);

[0026] Figure 3 This is a longitudinal sectional view of the operating handle assembly along its axial centerline;

[0027] Figure 4 This is an exploded view of a clamping pliers with good rotational flexibility according to this utility model;

[0028] Figure 5 This is a 3D view of the pliers head assembly;

[0029] Figure 6 This is a breakdown diagram of the handle;

[0030] Figure 7 It is a 3D diagram of the core rod;

[0031] Figure 8 It is a 3D diagram of the outer tube;

[0032] Figure 9 This is a breakdown diagram of the pliers head assembly;

[0033] Figure 10 This is a longitudinal sectional view along the axial centerline of a clamping pliers with good rotational flexibility (the clamping head assembly is in a closed state, and the ligation clamp is hidden).

[0034] In the diagram: 1. Outer tube; 2. Core rod; 3. Pliers head; 4. Handle; 5. Pull handle; 6. Elastic element; 7. Pin; 8. Torsion spring; 1-1. Guide groove; 1-2. Arc-shaped notch; 1-3. Connecting tube; 1-3a. Circular groove; 1-3b. Through hole; 2-1. Mounting rod; 2-1a. Mounting groove; 2-2. Connecting flat rod; 2-3. Circular boss; 2-4. Mounting hole one; 2-5. "9" shaped countersunk groove one; 3 -1. Ear plate; 3-1a. Mounting hole two; 3-1b. "9" shaped countersunk groove two; 3-1c. Countersunk groove three; 3-2. Clamping groove; 3-3. Positioning groove; 4-1. Metal core; 4-2. Plastic coating layer; 5-1. Handle one; 5-1a. Arm plate; 5-1b. Mounting hole three; 5-2. Handle two; 5-2a. Cavity; 5-2b. Threaded hole; 5-3. Screw; 7-1. End cap; A. Tail end groove. Detailed Implementation

[0035] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0036] Example

[0037] like Figures 1-9 As shown, a clamp with good rotational flexibility includes a clamp bar assembly, a clamp head assembly mounted on the left end of the clamp bar assembly, and an operating handle assembly mounted on the right end of the clamp bar assembly. The clamp head assembly includes two clamp heads 3 that can be opened and closed. The clamp bar assembly includes an outer tube 1 and a core rod 2 that is movably inserted inside the outer tube 1. The two clamp heads 3 are hinged to the left end of the core rod 2. The operating handle assembly includes a grip 4 and a pull handle 5. The grip 4 is fixedly installed to the right end of the outer tube 1. The right end of the outer tube 1 has a guide groove 1-1 that runs longitudinally through its upper and lower side walls. The pull handle 5 is detachably installed to the right end of the core rod 2, and the outer end of the pull handle 5 moves through the left end of the guide groove 1-1 and extends to the outside of the outer tube 1. An elastic member 6 that axially elastically abuts against the right end of the core rod 2 is inserted inside the right end of the outer tube 1, and the two clamp heads 3 are exposed to the outside of the left end of the outer tube 1 in an open state.

[0038] Preferably, the handle 5 includes a first handle 5-1, a second handle 5-2, and several screws 5-3. One end of the first handle 5-1 has an arm plate 5-1a, and the free end of the arm plate 5-1a has several mounting holes 5-1b penetrating the plate. The second handle 5-2 has a cavity 5-2a with an opening facing one end, and the second handle 5-2 also has several threaded holes 5-2b penetrating a set of sidewalls of the cavity 5-2a. The right end of the core rod 2 has a mounting groove 2-1a perpendicularly penetrating its axial center line. The free end of the arm plate 5-1a passes through the... The mounting slot 2-1a is inserted into the cavity 5-2a on the handle 2 5-2, and the free end of the arm plate 5-1a and the handle 2 5-2 are fixedly connected together by the screw 5-3 passing through the corresponding mounting hole 3 5-1b and threaded hole 5-2b on both. One of the handle 1 5-1 and the handle 2 5-2 extends out from the left end of the upper port of the guide groove 1-1 and extends to the upper outside of the outer sleeve 1, and the other of the handle 1 5-1 and the handle 2 5-2 extends out from the left end of the lower port of the guide groove 1-1 and extends to the lower outside of the outer sleeve 1.

[0039] More preferably, the right end of the core rod 2 has a mounting rod 2-1 extending along the axial length direction, and the outer peripheral side of the core rod 2 is provided with a plurality of circular bosses 2-3 extending radially outward along the axial length direction, and the outer diameter of the mounting rod 2-1 and the outer diameter of the circular bosses 2-3 are both slightly smaller than the inner diameter of the outer sleeve 1, and the mounting groove 2-1a is opened on the mounting rod 2-1 along the axial center line.

[0040] Preferably, the grip 4 is a rotating structure, and a connecting pipe 1-3 is coaxially welded and fixed to the right end of the outer sleeve 1. The left end of the connecting pipe 1-3 has a circular groove 1-3a with an opening facing the left. The right end of the connecting pipe 1-3 passes through and is welded and fixed inside the center hole of the grip 4. The right end of the connecting pipe 1-3 has a through hole 1-3b that communicates with the bottom of the circular groove 1-3a, and the inner diameter of the through hole 1-3b is less than the inner diameter of the circular groove 1-3a. The left port of the circular groove 1-3a communicates with the right end of the inner cavity of the outer sleeve 1. The right end of the elastic element 6 is inserted and installed inside the circular groove 1-3a, and the right end of the elastic element 6 abuts against the bottom of the circular groove 1-3a, and the left end abuts against the right end face of the core rod 2.

[0041] More preferably, the grip 4 includes an inner metal core 4-1 and an outer plastic coating layer 4-2, the right end of the connecting tube 1-3 passes through and is welded and fixed inside the central hole of the metal core 4-1, and the elastic element 6 is a spring.

[0042] Preferably, the core rod 2 has a connecting flat rod 2-2 extending along the axial length at its left end. The free end of the connecting flat rod 2-2 has a mounting hole 2-4 penetrating through both the front and rear sides. A pin 7 is inserted inside the mounting hole 2-4, and both ends of the pin 7 extend to the outside of the free end of the connecting flat rod 2-2. The right ends of the two pliers 3 each have a mounting hole 3-1a. The right end of one pliers 3 is rotatably fitted onto the front end of the pin 7 through the mounting hole 3-1a, and the right end of the other pliers 3 is rotatably fitted onto the rear end of the pin 7 through the mounting hole 3-1a. Each end of the pin 7 is equipped with an elastic component for keeping the two pliers 3 in an open state.

[0043] More preferably, the front and rear sides of the free end of the connecting flat rod 2-2 also have a "9"-shaped countersunk groove 2-5 coaxially located at both ends of the mounting hole 2-4. The right ends of both clamp heads 3 have ear plates 3-1 located in the vertical direction. The ear plates 3-1 have mounting holes 3-1a penetrating the plate body. The side of the ear plate 3-1 facing the connecting flat rod 2-2 has a "9"-shaped countersunk groove 3-1b corresponding to the inner end of the mounting hole 3-1a. The pin 7 is respectively fitted with a countersunk groove located at both ends of the mounting hole 3-4. A torsion spring 8 connects the free end of the flat rod 2-2 and the corresponding ear plate 3-1. The torsion spring 8 is embedded in the mounting cavity formed by a set of corresponding "9"-shaped countersunk groove 2-5 and "9"-shaped countersunk groove 3-1b. One end of the torsion spring 8 is engaged with the end slot A of the "9"-shaped countersunk groove 2-5, and the other end is engaged with the end slot A of the "9"-shaped countersunk groove 3-1b. A set of corresponding "9"-shaped countersunk groove 2-5, "9"-shaped countersunk groove 3-1b and torsion spring 8 constitute a set of the elastic components described above.

[0044] More preferably, the ear plate 3-1 on one of the pliers 3 has a countersunk groove 3-1c located on the outer end of the corresponding mounting hole 3-1a on one side away from the connecting flat rod 2-2. One end of the pin 7 has an end cap 7-1, and the end cap 7-1 is correspondingly embedded in the countersunk groove 3-1c. The other end of the pin 7 passes through and is welded and fixed inside the mounting hole 3-1a on the other pliers 3.

[0045] More preferably, an arc-shaped notch 1-2 is provided on the upper and lower sides of the left end edge of the outer sleeve 1, and one of the pliers 3 on the upper side corresponds to one of the arc-shaped notches 1-2 on the upper side, and one of the pliers 3 on the lower side corresponds to one of the arc-shaped notches 1-2 on the lower side.

[0046] More preferably, the mating surfaces of the two clamping heads 3 have clamping grooves 3-2 extending along the left-right length direction and positioning grooves 3-3 located at the left ends of the two side walls of the clamping grooves 3-2.

[0047] (I) The clamping principle of the clamping pliers with good rotational flexibility according to this utility model:

[0048] In the initial state, both clamp heads 3 are fully exposed outside the left end of the outer sleeve 1 in an open position, and the handles 5-1 and 5-2 on the pull handle 5 are both abutting against the left end of the guide groove 1-1 (see Appendix). Figure 2 and attached Figure 3Hold the operating handle assembly with your hand, positioning the handle 4 in the palm of your hand, with the outer tube 1 inserted into the gap between your index and middle fingers, hooking the handles 5-1 and 5-2 with your index and middle fingers; align the jaws between the two clamp heads 3 with the ligation clip in the open position inside the packaging box, ensuring that the two clamping arms of the ligation clip are correspondingly fitted into the clamping grooves 3-2 on the two clamping heads 3, and that the positioning cylinders at the ends of the two clamping arms are fitted into the corresponding positioning grooves 3-3 on the two clamping heads 3, thus performing the clamping operation; then operate the clamping forceps to deliver the clamp head assembly with the ligation clip to the tissue tube to be clamped, and use your palm to drive the handle 4 to move the outer tube 1 to the left (i.e., towards the clamp head assembly), causing the right ends of the two clamp heads 3 to gradually retract into the left end of the outer tube 1. During this process, the two clamp heads 3 gradually approach each other under the drive of the left edge of the outer tube 1 (see Appendix). Figure 10 The ligator engages the two clamp arms inside the jaws and snaps them together, thus completing the ligator engagement operation. The grip 4 is released, and the outer sleeve 1 moves to the right under the elastic restoring force of the elastic element 6, resetting the clamp. The two clamp heads 3 gradually move away from each other until they return to their initial open state.

[0049] (II) The cleaning principle of the clamping pliers with good rotational flexibility according to this utility model:

[0050] Remove screw 5-3 from handle 5, detach handle 1 5-1 and handle 5-2 from the clamp rod assembly, pull the clamp head assembly and core rod 2 out from the inside of outer tube 1 to the left, remove elastic element 6, and clean, dry and disinfect each component; then, reinstall elastic element 6 and core rod 2 with clamp head assembly from the left end into the inside of outer tube 1; insert the free end of arm plate 5-1a of handle 1 5-1 through the mounting groove 2-1a from one side of outer tube 1 into the cavity 5-2a of handle 2 5-2 on the other side of outer tube 1, and re-fix the free end of arm plate 5-1a and handle 2 5-2 together with screw 5-3 through the corresponding mounting holes 3 5-1b and threaded holes 5-2b on both, thus completing the cleaning operation of the clamping pliers.

[0051] This utility model discloses a clamping pliers with good rotational flexibility. The right end of the core rod, which is inserted inside the outer sleeve, is axially elastically abutted against the right end of the outer sleeve through an elastic element. A handle is installed at the right end of the outer sleeve, and a pull handle installed at the right end of the core rod extends to the outside of the outer sleeve through the left end of the guide groove on the outer sleeve. During use, the movement of the outer sleeve towards the clamping head assembly can be flexibly controlled with one hand. During this process, the outer sleeve moves to the left and gradually drives the two clamping heads to close, thereby realizing the clamping and firing operation of the ligation clip installed in the jaws between the two clamping heads. After releasing the handle, the outer sleeve automatically moves to the right to reset under the elastic restoring force of the elastic element. During operation, the clamping head assembly can be rotated at any angle to adapt the height of the ligation clip to the tissue to be clamped, thereby helping to improve the success rate of ligation operation. The pull handle can be removed from the core rod, allowing the core rod and elastic element to be pulled out from inside the outer sleeve for easy cleaning and maintenance. The overall structure is simple in design, lightweight, flexible, and highly practical.

[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A clip applier having good rotational flexibility, characterized by, The clamp assembly includes a clamp bar assembly, a clamp head assembly mounted on the left end of the clamp bar assembly, and an operating handle assembly mounted on the right end of the clamp bar assembly. The clamp head assembly includes two clamp heads (3) that can be opened and closed. The clamp bar assembly includes an outer tube (1) and a core rod (2) that is movably inserted inside the outer tube (1). The two clamp heads (3) are hinged to the left end of the core rod (2). The operating handle assembly includes a grip (4) and a pull handle (5). The grip (4) is fixedly mounted to the right end of the outer tube (1). The outer tube (1) has a guide groove (1-1) that runs longitudinally through its upper and lower side walls at the right end. The handle (5) is detachably installed at the right end of the core rod (2). The outer end of the handle (5) moves through the left end of the guide groove (1-1) and extends to the outside of the outer tube (1). An elastic element (6) that axially and elastically abuts against the right end of the core rod (2) is inserted inside the right end of the outer tube (1). The two clamp heads (3) are exposed to the outside of the left end of the outer tube (1) in an open state.

2. The clip applier of claim 1, wherein: The pull handle (5) includes a first handle (5-1), a second handle (5-2), and several screws (5-3). The first handle (5-1) has an arm plate (5-1a) at one end. The free end of the arm plate (5-1a) has several mounting holes (5-1b) that penetrate the plate. The second handle (5-2) has a cavity (5-2a) with its opening facing one end. The second handle (5-2) also has several threaded holes (5-2b) that penetrate a set of side walls of the cavity (5-2a). The right end of the core rod (2) has a mounting groove (2-1a) that perpendicularly penetrates its axial center line. The free end of the arm plate (5-1a) passes through the mounting groove. The slot (2-1a) is inserted into the cavity (5-2a) on the handle (5-2), and the free end of the arm plate (5-1a) and the handle (5-2) are fixedly connected together by the screw (5-3) passing through the corresponding mounting hole (5-1b) and threaded hole (5-2b) on both. One of the handle (5-1) and the handle (5-2) extends from the left end of the upper port of the guide slot (1-1) to the upper outside of the outer sleeve (1), and the other of the handle (5-1) and the handle (5-2) extends from the left end of the lower port of the guide slot (1-1) to the lower outside of the outer sleeve (1).

3. The clip applier of claim 2, wherein: The right end of the core rod (2) has a mounting rod (2-1) extending along the axial length direction. The outer peripheral side of the core rod (2) is provided with a plurality of circular bosses (2-3) extending radially outward along the axial length direction. The outer diameter of the mounting rod (2-1) and the outer diameter of the circular bosses (2-3) are both slightly smaller than the inner diameter of the outer sleeve (1). The mounting groove (2-1a) is opened on the mounting rod (2-1) along the axial center line.

4. The clip applier of claim 1, wherein: The grip (4) is a rotating structure. The right end of the outer tube (1) is coaxially welded with a connecting tube (1-3). The left end of the connecting tube (1-3) has a circular groove (1-3a) with an opening facing the left. The right end of the connecting tube (1-3) passes through and is welded to the center hole of the grip (4). The right end of the connecting tube (1-3) has a through hole (1-3b) that communicates with the bottom of the circular groove (1-3a). The inner diameter of the through hole (1-3b) is less than the inner diameter of the circular groove (1-3a). The left end of the circular groove (1-3a) communicates with the right end of the inner cavity of the outer tube (1). The right end of the elastic element (6) is inserted into the circular groove (1-3a). The right end of the elastic element (6) abuts against the bottom of the circular groove (1-3a) and the left end abuts against the right end face of the core rod (2).

5. The clamping pliers with good rotational flexibility as described in claim 4, characterized in that, The grip (4) includes an inner metal core (4-1) and an outer plastic coating layer (4-2). The right end of the connecting tube (1-3) passes through and is welded and fixed inside the central hole of the metal core (4-1). The elastic element (6) is a spring.

6. The clamping pliers with good rotational flexibility as described in claim 1, characterized in that, The core rod (2) has a connecting flat rod (2-2) extending along the axial length direction at its left end. The free end of the connecting flat rod (2-2) has a mounting hole (2-4) that passes through both the front and rear sides. A pin (7) is inserted inside the mounting hole (2-4), and both ends of the pin (7) extend to the outside of the free end of the connecting flat rod (2-2). The right ends of the two pliers (3) each have a mounting hole (3-1a). The right end of one pliers (3) is rotatably fitted onto the front end of the pin (7) through the mounting hole (3-1a), and the right end of the other pliers (3) is rotatably fitted onto the rear end of the pin (7) through the mounting hole (3-1a). Each end of the pin (7) is fitted with an elastic component for keeping the two pliers (3) in an open state.

7. The clamping pliers with good rotational flexibility as described in claim 6, characterized in that, The front and rear sides of the free end of the connecting flat rod (2-2) also have a "9"-shaped countersunk groove (2-5) coaxially located at both ends of the mounting hole (2-4). The right ends of the two clamp heads (3) each have a vertical ear plate (3-1). The ear plate (3-1) has a mounting hole (3-1a) penetrating the plate. The side of the ear plate (3-1) facing the connecting flat rod (2-2) is provided with a "9"-shaped countersunk groove (3-1b) corresponding to the inner end of the mounting hole (3-1a). The two ends of the pin (7) are respectively sleeved with a countersunk groove located at the end of the connecting flat rod (2-2). 2-2) The torsion spring (8) between the free end and the corresponding ear plate (3-1) is embedded in the mounting cavity formed by a set of corresponding "9"-shaped countersunk groove one (2-5) and "9"-shaped countersunk groove two (3-1b). One end of the torsion spring (8) is engaged in the end groove (A) of the "9"-shaped countersunk groove one (2-5) and the other end is engaged in the end groove (A) of the "9"-shaped countersunk groove two (3-1b). A set of corresponding "9"-shaped countersunk groove one (2-5), "9"-shaped countersunk groove two (3-1b) and torsion spring (8) constitute a set of the elastic components described above.

8. The clamping pliers with good rotational flexibility as described in claim 7, characterized in that, The ear plate (3-1) on one of the pliers (3) has a countersunk groove (3-1c) on the side opposite to the connecting flat rod (2-2) located at the outer end of the corresponding mounting hole two (3-1a). One end of the pin (7) has an end cap (7-1), and the end cap (7-1) is correspondingly embedded in the countersunk groove three (3-1c). The other end of the pin (7) passes through and is welded to the mounting hole two (3-1a) on another pliers (3).

9. The clamp with good rotational flexibility as described in any one of claims 1 to 8, characterized in that, The outer sleeve (1) has an arc-shaped notch (1-2) on the upper and lower sides of its left end edge, and the upper pliers (3) corresponds to the upper arc-shaped notch (1-2), and the lower pliers (3) corresponds to the lower arc-shaped notch (1-2).

10. The clamping pliers with good rotational flexibility as described in claim 9, characterized in that, The mating surfaces of the two clamp heads (3) have clamping grooves (3-2) extending along the left and right length directions and positioning grooves (3-3) located at the left ends of the two side walls of the clamping grooves (3-2).

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