A new type of rough head and thin rod pliers

Abstract

A new type of thick head and thin rod pliers is provided, which comprises a handle assembly and an inner rod assembly. The inner rod assembly comprises an outer tube, an inner pull rod, a first plier blade, a second plier blade, a first connecting plate, a second connecting plate and a main pin. The outer tube comprises a distal end base and a proximal end tube handle and an elongated tube extending therebetween, and the base comprises a seat body and a first arm and a second arm. The first plier blade and the second plier blade are mounted between the first arm and the second arm, the first connecting plate is connected with the first plier blade to form a first transmission pair capable of rotating with each other, the second connecting plate is connected with the second plier blade to form a second transmission pair capable of rotating with each other, and the pull rod comprises a pull rod head mounted between the first connecting plate and the second connecting plate to form a rotatable driving pair. The outer diameter of the elongated tube is D1, the maximum outer diameter of the base is D2, and D1 and D2 satisfy the relationship 1.5×D1≤D2≤2.5×D1.

Description

Technical Field

[0001] This invention relates to surgical instruments, and more particularly to a minimally invasive surgical instrument. Background Technology

[0002] Laparoscopic minimally invasive surgery uses extended laparoscopic surgical instruments, which are inserted into the patient's body through natural cavities or constructed puncture channels to perform procedures such as tissue grasping, cutting, separation, coagulation, and suturing. Compared to traditional open surgery, its main advantages are reduced trauma, less pain, and faster recovery. Currently, laparoscopic surgery typically creates multiple 10mm puncture channels (approximately 13mm outer diameter) and 5mm puncture channels (approximately 7mm outer diameter) in the patient's body wall. The 10mm channels allow 10mm instruments to enter and exit the patient, while the 5mm channels allow 5mm instruments. Clinical experience over the past 30 years has shown that the current 13mm and 7mm channels cause significant trauma to the patient's body wall muscles, resulting in longer recovery times and even the risk of hernia or chronic pain. To date, there is no effective solution. Utility Model Content

[0003] Therefore, in order to solve the problems of existing technologies, a variety of solutions have been proposed.

[0004] In one aspect of the invention, a novel coarse-tipped fine-bar pliers is provided, comprising a handle assembly and an inner rod assembly. The inner rod assembly includes an outer tube, an inner pull rod, a first clamping plate, a second clamping plate, a first connecting plate, a second connecting plate, and a kingpin. The outer tube includes a distal base, a proximal handle, and an extension tube extending therebetween. The base includes a seat body and a first and second arm extending distally. The seat body extends proximally and its outer diameter gradually decreases to form a proximal ramp. A side hole is provided at the distal end of the base and laterally penetrates the first and second arms. The extension tube includes a distal end and a proximal end, and a tube body extending therebetween. The distal end is integrally connected to the proximal ramp, and the proximal end is integrally connected to the proximal handle. The first clamping plate includes a first jaw, a first tail, and a first shoulder connected thereto. The first jaw includes a first jaw, and the first tail includes a first pivot hole and a first tail hole. The second clamping plate includes a second jaw, a second tail, and a second shoulder connected thereto. The second jaw includes a second jaw, and the second tail includes a second pivot hole and a second tail hole. The first connecting piece includes a first head and a first tail and a first body connected thereto. The second connecting piece includes a second head and a second tail and a second body connected thereto. The inner pull rod includes a pull rod head and a pull rod tail and a pull rod extending therefrom. The first and second clamping plates are mounted between a first arm and a second arm. A main pin passes through the first pivot hole, the second pivot hole, and a side hole, fixing the first and second clamping plates between the first and second arms. The first and second clamping plates are rotatable around the main pin, forming a main rotating pair. The first and second connecting plates are installed between the first and second arms. The first jaw tail and the first jaw head are integrated to form a first transmission pair that can rotate relative to each other. The second jaw tail and the second jaw head are integrated to form a second transmission pair that can rotate relative to each other. The pull rod head is clamped between the first and second jaw tails, and the pull rod head, the first jaw tail, and the second jaw tail are integrated to form a main drive pair that can rotate relative to each other. Moving the pull rod head drives the first and second connecting plates to move and rotate, thereby driving the first and second transmission pairs to move and rotate, and further driving the main rotating pair to rotate, thus realizing the closing or opening of the first and second jaws.

[0005] In one embodiment, the outer diameter of the extension tube is D1, and the maximum outer diameter of the base is D2. D1 and D2 satisfy the relationship 1.5*D1≤D2≤2.5*D1.

[0006] In another scheme, the near-end ramp and the axis of the extension pipe form an angle A1, where 2°≤A1≤45°.

[0007] In another scheme, 1.5mm≤D0≤2.5mm, 1.5mm≤D1≤2.6mm.

[0008] In another embodiment, the lateral thickness B1 of the first jaw, the lateral width B2 of the first jaw, and the maximum circumscribed circle diameter D4 of the first jaw shoulder satisfy the following relationships: B1≤0.25*D4, B2≤0.5*D4.

[0009] In another embodiment, the length of the first jaw is H1, and the distance from the proximal end of the first jaw to the first pivot hole is H2, where H1 ≥ 0.1 * H2.

[0010] In another embodiment, the length of the extension tube is L1, and the length of the base is L2, wherein L1 ≥ 10 * L2. Attached Figure Description

[0011] To gain a fuller understanding of the essence of the present invention, a detailed description will be provided below in conjunction with the accompanying drawings, wherein:

[0012] Figure 1 This is a side projection view of instrument 1;

[0013] Figure 2 This is a projected view of the other side of instrument 1;

[0014] Figure 3 This is an exploded view of the inner rod assembly 3;

[0015] Figure 4 It is a partial projection view of the broken side of the outer tube 10;

[0016] Figure 5 yes Figure 4 Sectional view 5-5;

[0017] Figure 6 This is a side projection view of the first clamping plate 30 (the second clamping plate 40);

[0018] Figure 7 This is a side projection view of the first clamping plate 30 (the second clamping plate 40);

[0019] Figure 8 This is a projection view of the first clamp 30 (second clamp 40) from the far end toward the progress.

[0020] Figure 9 This is a 3D schematic diagram of the first connecting piece 50 (the second connecting piece 60);

[0021] Figure 10 This is a partial projection view of the distal head of the inner rod assembly 3;

[0022] Figure 11 yes Figure 10 Partial sectional view 11-11;

[0023] Figure 12yes Figure 10 Partial sectional view 12-12;

[0024] Figure 13 This is a partial sectional view of the inner rod assembly and the handle assembly in action;

[0025] Figure 14 This is a three-dimensional schematic diagram of a typical single-port multi-channel puncture device (platform);

[0026] Figure 15 This is a schematic diagram of the puncture channel setup for a new microsurgical technique;

[0027] Figure 16 This is a three-dimensional schematic diagram of the 80 micro-puncture needle;

[0028] In all views, the same label indicates the same part or component. Detailed Implementation

[0029] Embodiments of the invention are disclosed herein; however, it should be understood that the disclosed embodiments are merely examples of the invention, and the invention can be implemented in different ways. Therefore, the disclosure herein is not to be construed as limiting, but rather serves only as the basis for the claims and as a means of teaching those skilled in the art how to use the invention.

[0030] refer to Figure 1 For ease of description, the side closer to the operator will be defined as the proximal end, and the side farther from the operator will be defined as the distal end. During laparoscopic surgery, a trocar assembly is typically used to create a surgical channel in the patient's body wall for instruments to enter and exit the body. Various minimally invasive instruments can be inserted into the body cavity through this channel. During the procedure, one or more trocar assemblies may need to be used simultaneously, and one or more instruments may be configured for simultaneous operation as needed.

[0031] Figure 1 A novel type of coarse-headed fine-bar pliers 1 is described, comprising a handle assembly 2 and an inner bar assembly 3.

[0032] Figures 2-3 The structure and composition of the inner rod assembly 3 are depicted. The inner rod assembly 3 shown includes an outer tube 10, an inner tie rod 20, a first clamping plate 30, a second clamping plate 40, a first connecting plate 50, a second connecting plate 60, and a main pin 70.

[0033] Figures 3-5The structure and composition of the outer tube 10 are depicted. The outer tube 10 includes a distal base 11, a proximal handle 17, and an extension tube 15 extending therebetween. The base 11 includes a seat body 111 and a first arm 112 and a second arm 113 extending distally. The seat body 111 extends proximally and gradually narrows in outer diameter to form a proximal ramp 115. The first arm 112 and the second arm 113 define a U-shaped fork 114. A side hole 116 is provided at the distal end of the base and laterally penetrates the first arm and the second arm. A shaft hole 117 penetrates the base and communicates with the U-shaped fork 114. The extension tube 15 includes a distal head 151, a proximal tail 155, and a tube body 153 extending therebetween. The handle 17 includes a distal handle head 171, a proximal handle tail 175, and a handle body 173 extending therebetween. The adjacent region of the handle tail 175 includes a handle ring groove 177.

[0034] The tube head 151 is integrally connected to the ramp 115, and the tube tail 155 is integrally connected to the handle 171. Those skilled in the art will recognize that the outer tube 10 can be disassembled into two or more parts and then welded together. Alternatively, it can be made from the same base tube or rod by cutting away material.

[0035] Figure 3 The structure of the inner tie rod 20 is depicted. The inner tie rod 20 includes a tie rod head 21, a tie rod tail 27, and a tie rod bar 25 extending therebetween. The tie rod tail 27 includes a tie rod annular groove 271, and the tie rod head 21 includes a tie rod cross axis 271.

[0036] Figures 6-8 The structure and composition of the first jaw 30 and the second jaw 40 are depicted. The first jaw 30 includes a first jaw 31, a first jaw 35, and a first jaw shoulder 33 connected thereto. The first jaw 31 includes a first jaw 311, and the first jaw includes a first pivot hole 351 and a first jaw hole 352 passing through it. The second jaw 40 includes a second jaw 41, a second jaw 45, and a second jaw shoulder 43 connected thereto. The second jaw 41 includes a second jaw 411, and the second jaw includes a second pivot hole 451 and a second jaw hole 452 passing through it.

[0037] Figure 9 The structure and composition of a first connecting piece 50 and a second connecting piece 60 are depicted. The first connecting piece 50 includes a first tip 51, a first tail 55, and a first body 53 connected thereto. The first tip includes an outwardly extending first connecting shaft 511, and the first tail includes a through-hole 551. The second connecting piece 60 includes a second tip 61, a second tail 65, and a second body 63 connected thereto. The second tip includes an outwardly extending second connecting shaft 611, and the second tail includes a through-hole 651.

[0038] Figures 10-12The assembly relationship of the inner rod assembly 3 is depicted. The first clamping plate 30 and the second clamping plate 40 are installed in the U-shaped fork 114 between the first arm 112 and the second arm 113; the main pin passes through the first pivot hole 351, the second pivot hole 451 and the side hole 116, fixing the first and second clamping plates between the first and second arms; wherein the first clamping plate and the second clamping plate can rotate around the main pin, forming a main rotating pair. The first connecting plate and the second connecting plate are installed in the U-shaped fork; the first connecting shaft 511 passes through the first clamping tail hole 352 to connect the first clamping tail 35 and the first clamping head 51, and can rotate relative to each other, forming a first transmission pair; the second connecting shaft 611 passes through the second clamping tail hole 452 to connect the second clamping tail and the second clamping head, and can rotate relative to each other, forming a second transmission pair. The pull rod head 21 is clamped between the first tail plate 55 and the second tail plate 65. The pull rod horizontal shaft 271 passes through the first tail plate hole 551 and the second tail plate hole 651, connecting the pull rod head with the first and second connecting plates, and can rotate relative to each other, forming a main drive pair.

[0039] Now combined Figure 1 , Figure 2 , Figure 10 and Figure 13 Understood. The handle assembly 2 includes a first handle 92 and a second handle 93 connected to a handle pivot 91, the first and second handles being rotatable about the handle pivot. The wheel assembly 95 includes a wheel 951, an outer sleeve 953, and an inner sleeve 955. The outer sleeve 953 is integrally connected to the wheel 951, and the inner sleeve 955 is integrally connected to the first handle 92. The outer sleeve 953 and the inner sleeve 955 constitute a rotating mechanism that allows the wheel 951 to rotate relative to the first handle. The button assembly 97 is installed in the button mounting chamber 98 of the first handle 92. The button assembly 97 includes a locking member 972, one end of which is connected to an elastic element 971 and the other end is connected to a button 974. A fastener 973 restricts the locking member 972 within the mounting chamber 98, and the elastic element 971 drives the locking member 972 to move laterally within the mounting chamber 98 to the locked position. The novel coarse-headed fine-bar pliers 1 includes a handle assembly 2 and an inner bar assembly 3. The pull rod tail 27 matches the second handle 93. The elastic element 971 drives the locking member 972 to move laterally within the mounting chamber 98 to the locking position and match the handle ring groove 177. The handle body 173 matches the rotating wheel 951, which transmits rotational torque to the inner rod assembly. The first and second handles rotate around the handle axis, thereby pushing the pull rod tail 27 to move axially, which in turn pushes the pull rod head to move axially, thereby driving the first and second connecting pieces to move and rotate, causing the first and second jaws to rotate, thus closing or opening the first and second jaws. Pressing the button 97 compresses the elastic element 971, causing the locking member 972 to move laterally away from the locking position, disengaging the handle ring groove 177 from the locking member 972, thereby separating the inner rod assembly 3 and the handle assembly 2.

[0040] Those skilled in the art should understand that currently performed laparoscopic minimally invasive surgery typically involves establishing multiple puncture channels in the patient's body wall. Various extended surgical scissors, forceps, clamps, and energy devices are inserted through these channels to perform surgical procedures such as lesion exposure, organ removal, lesion resection, hemostasis, internal suturing, and removal of lesions and foreign bodies. Compared to traditional open surgery, laparoscopic surgery involves smaller incisions and faster recovery. To date, in the field of general surgery, most laparoscopic surgeries have gradually replaced traditional open surgeries.

[0041] A typical puncture channel setup for laparoscopic cholecystectomy: A 10mm trocar (actual inner diameter 10.8mm, outer diameter 13mm) T1 is placed at the umbilicus as the endoscopic channel; a 10mm trocar T2 is the main channel; and two 5mm trocars (actual inner diameter 5.8mm, outer diameter 7mm) T3 and T4 are used as auxiliary channels.

[0042] A typical puncture channel setup for laparoscopic esophagectomy: a 10mm trocar T1 is placed at the navel as the endoscopic channel; a 10mm trocar T2 is the main channel; and four 5mm trocars T3, T4, T5, and T6 are used as auxiliary channels.

[0043] With the widespread clinical application of laparoscopic surgery, the procedure has become increasingly sophisticated, and the validation of its effectiveness has deepened. Studies have shown that laparoscopic surgery creates larger puncture channels in the patient's body wall, especially channels larger than 10mm, which damage muscle fibers, leading to a longer recovery period. Some patients are prone to incisional hernias, and most experience pain for a considerable period after surgery, especially when the wound muscles are stressed or when external environmental factors such as weather changes occur.

[0044] In recent years, single-port laparoscopic surgery has gradually become a new focus in order to reduce functional muscle damage. For example... Figure 14 Single-port laparoscopic surgery involves making a 30mm incision at the patient's navel, inserting a protective sheath, and widening the incision to approximately 50mm. A multi-access sealed platform is then attached to the protective sheath, allowing surgical procedures such as lesion exposure, organ removal, lesion excision, hemostasis, internal suturing, and removal of lesions and foreign bodies to be performed through a single incision. The main challenge of single-port laparoscopic surgery is that the trauma at the navel is greater than the combined trauma caused by traditional multiple puncture channels. Furthermore, the lack of a triangular area for instrument coordination when multiple instruments are inserted through a single incision under single-port laparoscopy demands a high level of surgical skill from the surgeon and results in a longer surgical time.

[0045] Traditional multi-port laparoscopic surgery requires a 10mm or 12mm main puncture channel, involving multiple changes of various instruments such as tissue forceps, energy forceps (dissection forceps), needle holders (suture forceps), clipping forceps (closure forceps), irrigation tubes, and retrieval instruments. Approximately 90% of the time, 5mm diameter instruments are used, and about 10% of the time, 10mm diameter instruments are used. Other auxiliary or collaborative puncture channels consistently use 5mm diameter instruments. The large-diameter puncture channel, combined with the insertion and exit of multiple instruments and extreme angled manipulations, causes significant muscle tearing and damage at the puncture site. Single-port laparoscopic surgery, in essence, enlarges the main operating port. All instruments enter the patient's body through an incision sheath, employing a larger and more complex surgical procedure with varying incised angles. This results in a larger incision for the patient and greater additional damage at the incision site.

[0046] This invention proposes a novel minimally invasive surgical technique combining multi-port and single-port laparoscopy. For example... Figure 15 As shown, an incision of approximately 15 mm in diameter is made at the patient's navel using a simplified single-port access platform T0. The single-port access platform T0 includes an incision protective sleeve with a diameter of approximately 15 mm, to which a multi-port sealing platform is connected. The multi-port access platform includes a 5 mm diameter channel T1 and a 10 mm diameter channel T2. Small incisions are made at appropriate locations around the 15 mm incision, for example... Figure 15 The T4, T5, T6, and T7 incisions shown allow instruments to be inserted directly into the patient's body without changing instruments during the minimally invasive surgery. In one approach, a 5mm endoscope is inserted through T1, while temporarily used large-diameter instruments, such as clamps, closing forceps, and retrieval devices, are inserted through T2. In another approach, a 10mm instrument used for routine procedures is inserted through T2; when the 10mm instrument is used briefly, a 5mm endoscope is used through T1, while temporarily used large-diameter instruments, such as clamps, closing forceps, and retrieval devices, are inserted through T2.

[0047] For reference Figures 4-5 In one embodiment, the outer diameter of the extension tube is D1, and the outer diameter of the base 11 is D2. D1 and D2 satisfy the relationship 1.5*D1≤D2≤2.5*D1. The base 11 extends towards the proximal end and its outer diameter gradually decreases to form a proximal slope 115. The slope 115 forms an angle A1 with the axis of the extension tube 15, where 2°≤A1≤45°. The diameter of the tube handle is D3, where D3>D1. The length of the extension tube is L1, and the length of the base is L2. In a preferred design, L1≥10*L2.

[0048] Now for reference Figures 6-8In one embodiment, the lateral thickness B1 of the first jaw (second jaw), the lateral width B2 of the first jaw (second tip), and the maximum circumscribed circle diameter D4 of the first jaw shoulder (second jaw shoulder) satisfy the following relationships: B1≤0.25*D4, B2≤0.5*D4.

[0049] The length H1 of the first jaw (second jaw) and the distance H2 from the proximal end of the first jaw to the first pivot hole (the distance from the proximal end of the second jaw to the second pivot hole) are defined as follows: H1 ≥ 0.1 * H2.

[0050] Figure 16 An ultramicro puncture needle 80 is described, comprising a proximal puncture handle 81 and a distal puncture rod 83 with a diameter of D0, the puncture rod comprising a distal needle tip 85.

[0051] To date, in clinical applications such as flexible endoscopic surgery, urological endoscopy, otolaryngological endoscopy, and hysteroscopy, surgical forceps with a diameter less than 3.0 mm must pass through a fixed-diameter channel on the endoscope. Therefore, designing such forceps with a distal head diameter larger than the extension tube diameter has no clinical value. Those skilled in the art should understand that these forceps passing through the endoscopic channel must generally be flexible or semi-rigid, limited to simple or specific surgical procedures. These instruments cannot replace existing 5 mm series instruments for complex general surgical procedures.

[0052] In one design of this invention, the following parameters are used: 2.0mm ≤ D0 ≤ 3.0mm, 2.0mm ≤ D1 ≤ 3.5mm, and 1.5*D1 ≤ D2 ≤ 2.0*D1. In a specific embodiment, D0 = 3.0mm, D1 = 3.5mm, and D2 = 5.0mm. That is, a 3.0mm puncture needle is used to puncture the patient's body wall. After removing the puncture needle, a 5.0mm instrument tip is used to dilate the wound. Once inside the patient's body, a 3.5mm diameter outer tube maintains a slight dilatational contact with the incision. In this embodiment, instrument 1 achieves the same strength as a 5mm diameter instrument. In another specific embodiment, D0 = 2.5mm, D1 = 3.0mm, and D2 = 4.5mm. That is, a 2.5mm puncture needle is used to puncture the patient's body wall. After removing the puncture needle, a 4.5mm instrument tip is used to dilate the wound. Once inside the patient's body, a 3.0mm diameter outer tube maintains a slight dilatational contact with the incision. This design achieves the same strength as device 1 with a diameter of 5mm.

[0053] In another design of the present invention, the values ​​are 1.5mm ≤ D0 ≤ 2.5mm, 1.5mm ≤ D1 ≤ 2.6mm, and 1.5*D1 ≤ D2 ≤ 2.5*D1. In one specific design, D0 = 2.0mm, D1 = 2.5mm, and D2 = 4.0mm. That is, a 3.0mm puncture needle is used to puncture the patient's body wall. After removing the puncture needle, a 5.0mm instrument tip is used to dilate the wound. Once inside the patient's body, a 3.5mm diameter outer tube maintains a slight dilatational contact with the incision. In another specific design, D0 = 1.5mm, D1 = 1.9mm, and D2 = 4.0mm. That is, a 1.5mm puncture needle is used to puncture the patient's body wall. After removing the puncture needle, a 4.0mm instrument tip is used to dilate the wound. Once inside the patient's body, a 1.9mm diameter outer tube maintains a slight dilatational contact with the incision. Those skilled in the art will understand that the extension tube and inner tie rod can be manufactured using high-strength stainless steel (e.g., 17-4PH, 17-7PH, PH15-7Mo, 15-5PH), and the first clamping plate, second clamping plate, first connecting plate, and second connecting plate can be manufactured using ultra-high-strength stainless steel (e.g., Custom465, F863). Combined with the aforementioned dimensional design of 1.5*D1≤D2≤2.5*D1, the strength of the device can be made close to or equivalent to that of existing 5mm diameter devices.

[0054] Studies have shown that when the incision size is ≤2.6mm, there is less damage to the patient's muscles or tissues, and the wound heals with almost no scarring. Based on this research, a preferred approach selects instruments with diameters of 1.5mm≤D0≤2.5mm, 1.5mm≤D1≤2.6mm, and 1.5*D1≤D2≤2.5*D1. Unlike traditional laparoscopic surgery, this approach does not involve multiple instruments being switched between via a main instrument. Instead, several incisions are made in the patient's body wall, and the necessary tissue forceps, energy forceps, dissecting forceps, needle holders, etc., are inserted separately. Instruments are not switched during the procedure; only the appropriate instruments are used as needed. While instruments ≤1.5mm cause less trauma to the patient with current material technology and processing techniques, their strength and rigidity are insufficient to support the complex procedures of general surgical laparoscopic surgery.

[0055] Those skilled in the art should understand that certain features described in this invention can be combined and rearranged:

[0056] For example, the first clamp tail hole and the first connecting shaft are interchanged, that is, the first clamp tail includes the first connecting shaft, and the first blade head includes the first transmission hole, and the first connecting shaft is inserted into the first transmission hole to form the first transmission pair.

[0057] For example, the first connecting shaft is replaced by the first transmission hole, and an additional connecting shaft is inserted into the first jaw hole and the first transmission hole to connect the first jaw and the first blade head together to form a first transmission pair that can rotate with each other.

[0058] For example, a drive hole can be used to replace the horizontal shaft 271 of the pull rod. An additional drive shaft is inserted into the drive hole, the first tail hole, and the second tail hole, connecting the pull rod head to the first and second connecting plates, which can rotate relative to each other, forming a main drive pair.

[0059] US patents US5489290, US5947996, US6340365, US7931667, US8551077, and US8926599 disclose various quick-connect and disconnect mechanisms for inner rod assemblies and reusable handles. These mechanisms, with slight modifications, can all be used to connect the inner rod assembly and the reusable handle of this invention. To date, the field of minimally invasive surgical instruments has disclosed many connection methods between inner rod assemblies and handles for minimally invasive surgical instruments. With slight modifications, these methods can all be used to connect the inner rod assembly and handle of this invention, and will not be exhaustive here. Those skilled in the art should understand that the first, second, etc., are not in a strict order, but are used only for the sake of simplicity and accuracy, and for ease of understanding.

Claims

1. A novel type of coarse-headed thin-bar pliers, comprising a handle assembly and an inner rod assembly, wherein the inner rod assembly comprises an outer tube, an inner pull rod, a first clamping plate, a second clamping plate, a first connecting plate, a second connecting plate, and a main pin, characterized in that: 1) The outer tube includes a distal base and a proximal handle, and an extension tube extending therebetween. The base includes a seat body and a first arm and a second arm extending distally. The seat body extends proximally and its outer diameter gradually decreases to form a proximal ramp. A side hole is provided at the distal end of the base and laterally penetrates the first arm and the second arm. The extension tube includes a distal tube head and a proximal tube tail, and a tube body extending therebetween. The tube head is integrated with the proximal ramp, and the tube tail is integrated with the proximal handle. 2) The first clamping plate includes a first jaw, a first tail, and a first shoulder connected thereto, the first tail including a first pivot hole; the second clamping plate includes a second jaw, a second tail, and a second shoulder connected thereto, the second tail including a second pivot hole penetrating thereto; the first connecting plate includes a first head and a first tail and a first body connected thereto, the second connecting plate includes a second head and a second tail and a second body connected thereto; the inner pull rod includes a pull rod head and a pull rod tail and a pull rod extending therebetween; 3) The first clamping plate and the second clamping plate are installed between the first arm and the second arm. The main pin passes through the first pivot hole, the second pivot hole, and the side hole, fixing the first clamping plate and the second clamping plate between the first arm and the second arm. The first clamping plate and the second clamping plate can rotate around the main pin, forming a main rotating pair. The first connecting piece and the second connecting piece are installed between the first arm and the second arm. The first clamping tail and the first clamping head are integrated and form a first transmission pair that can rotate relative to each other. The second clamping tail and the second clamping head are integrated and form a second transmission pair that can rotate relative to each other. The pull rod head is clamped between the first clamping tail and the second clamping tail. The pull rod head, the first clamping tail, and the second clamping tail are integrated and form a main driving pair that can rotate relative to each other. The movable pull rod head drives the first connecting piece and the second connecting piece to move and rotate, thereby driving the first transmission pair and the second transmission pair to move and rotate, and in turn driving the main rotary pair to rotate, so as to realize the closing or opening of the first and second jaws; 4) The outer diameter of the extension tube is D1, and the maximum outer diameter of the base is D2. D1 and D2 satisfy the relationship 1.5*D1≤D2≤2.5*D1.

2. The novel coarse-headed thin-bar pliers as described in claim 1, characterized in that, The proximal slope and the axis of the extension pipe form an angle A1, where 2°≤A1≤45°.

3. The novel coarse-headed thin-bar pliers as described in claim 1, characterized in that, 1.5mm≤D1≤2.6mm.

4. The novel coarse-headed thin-bar pliers as described in claim 1, characterized in that, The first jaw includes a first jaw, the second jaw includes a second jaw, the first jaw has a lateral thickness B1, the first jaw has a lateral width B2, and the first jaw has a maximum circumscribed circle diameter D4, wherein B1, B2, and D4 satisfy the following relationship: B1≤0.25*D4, B2≤0.5*D4.

5. The novel coarse-headed thin-bar pliers as described in claim 4, characterized in that, The length of the first jaw is H1, and the distance from the proximal end of the first jaw to the first pivot hole is H2, where H1 ≥ 0.1 * H2.

6. The novel coarse-tipped thin-bar pliers as described in claim 1, characterized in that: The length of the extension tube is L1, and the length of the base is L2, wherein L1 ≥ 10 * L2.

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