Orthopedic reduction forceps

Abstract

The application discloses an orthopedic reduction forceps, comprising two forceps heads, two forceps arms hinged to each other, wherein the first end of one of the forceps arms is movably connected with one of the forceps heads through an adjusting mechanism, and the first end of the other forceps arm is fixedly connected with the other forceps head or movably connected with the other forceps head through an adjusting mechanism; the adjusting mechanism comprises a push cylinder, a medium loop and a driving assembly, wherein the push cylinder is arranged at the first end of the forceps arm, the output shaft of the push cylinder is connected with the second end of the forceps head, the driving assembly is arranged at the second end of the forceps arm, and the driving assembly is connected with the push cylinder through the medium loop, which is used for driving the fluid in the medium loop to flow into the push cylinder along a first path or a second path, so as to control the output shaft of the push cylinder and the forceps head to move in the direction of increasing or reducing the size of the forceps head. The application can adjust the size of the forceps head outside the human body, is convenient and fast to operate, and effectively improves the success rate of operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an orthopedic reduction forceps. Background Technology

[0002] In orthopedic clinical treatment, fracture reduction is a crucial procedure in internal fixation surgery, external fixation surgery, and trauma repair. It precisely restores displaced or misaligned bone fragments to anatomical or functional alignment, laying a solid foundation for bone healing and limb function reconstruction. Orthopedic reduction forceps, by clamping, pulling, or pushing the bone fragments, can achieve reduction and temporary fixation of fracture pieces, and are one of the important surgical instruments for fracture reduction in orthopedic clinical treatment.

[0003] Currently, the orthopedic reduction forceps routinely used in clinical practice typically consist of two hinged arms and forceps heads fixed to the front ends of the arms. Because the forceps heads and arms are fixedly connected, the maximum opening size of the jaws is fixed and lacks any size adjustment function. During use, they can only be adapted to bone reduction operations of a single size and location, and cannot flexibly adjust the size of the clamping jaws according to the different bone sizes of different patients. This can easily increase the difficulty of the operation and prolong the operation time, especially when the jaws need to be inserted into the body through an incision for orthopedic surgery. Since the size of the surgical incision is constant, the jaws are widened by increasing the angle between the two forceps arms. If the angle between the two forceps arms is too large, the surgical incision can be stretched by the forceps arms, causing secondary damage to the patient, increasing the patient's pain and recovery time.

[0004] To address the shortcomings of conventional orthopedic reduction forceps, existing technologies have provided some adjustable orthopedic reduction forceps. For example, Chinese utility model patent application number CN201120300640.6 discloses a novel bone-holding forceps. The front end of the right forceps arm of this novel forceps is connected to retractable short clamping teeth, which can flexibly adjust the size of the clamping opening according to the different bone sizes of different patients during surgery. This reduces the difficulty of the doctor's work, facilitates the operation, improves the doctor's work efficiency, shortens the patient's treatment time, and reduces the patient's pain. However, although the aforementioned new bone-holding forceps have a certain ability to adjust the size of the jaws, the adjustment mechanism is integrated at one end near the jaws. This end often needs to be inserted into the body through the surgical incision during surgery. Therefore, the size adjustment needs to be completed in advance before the start of surgery. If it is necessary to adapt to different sizes of bones during surgery, the surgeon cannot adjust in real time and quickly. The operation must be paused to make secondary adjustments to the instruments or even replace the instruments. The operation process is cumbersome and lacks continuity, which increases the risk of intraoperative bleeding and surgical infection, and easily reduces the success rate of surgery. It is difficult to meet the needs of efficiency and convenience in modern orthopedic surgery.

[0005] Therefore, it is necessary to develop an orthopedic reduction forceps to overcome the shortcomings in current practical applications. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes an orthopedic reduction forceps that allows for adjustment of the jaw size outside the human body, making operation convenient and quick, and effectively improving the success rate of surgery.

[0007] The technical solution of this invention is implemented as follows: An orthopedic reduction forceps includes two forceps heads and two forceps arms hinged together, wherein the first end of one forceps arm is movably connected to one of the forceps heads via an adjustment mechanism, and the first end of the other forceps arm is fixedly connected to the other forceps head or movably connected to the other forceps head via an adjustment mechanism; The adjustment mechanism includes a push cylinder, a medium circuit, and a drive assembly. The push cylinder is located at the first end of the clamp arm, and its output shaft is connected to the second end of the clamp head. The drive assembly is located at the second end of the clamp arm and is connected to the push cylinder through the medium circuit. The drive assembly is used to drive the fluid in the medium circuit to flow into the push cylinder along a first path or a second path, so as to control the output shaft of the push cylinder and the clamp head to move in the direction of increasing or decreasing the jaws.

[0008] In a preferred embodiment, the drive assembly includes a fluid pusher and two chambers. The two chambers are arranged opposite to each other and are fixedly connected to the second end of the clamp arm. The opposite ends of the two chambers are connected to the medium circuit. The two ends of the fluid pusher are respectively movably sleeved with the adjacent ends of the two chambers. When the fluid pusher moves along the chambers, the fluid in the medium circuit flows into one of the chambers and the fluid in the other chamber flows into the medium circuit.

[0009] In a preferred embodiment, the fluid pusher includes an outer cylinder, a middle collar, an inner rod, and two plugs. The two ends of the outer cylinder are respectively fitted onto the outer sides of the two compartments, and the outer cylinder is threadedly connected to the compartments. The middle part of the inner rod is fixedly fitted onto the inner side of the outer cylinder through the middle collar, and the two ends of the inner rod are rotatably connected to the two plugs, and the plugs are movably and sealingly fitted onto the inner side of the compartments.

[0010] In a preferred embodiment, the medium circuit includes two medium pipes, one end of which is connected to the two inner cavities of the push cylinder, and the other end of which is connected to the opposite ends of the two compartments.

[0011] In a preferred embodiment, the clamp arm includes a main arm and a support arm. The first end of the main arm is fixedly connected to the clamp head or push cylinder, and the first end of the support arm is fixedly connected to the main arm. The second end of the support arm is opposite to the second end of the main arm. Two compartments are respectively fixedly disposed at the second ends of the main arm and the support arm. The second end of one medium pipe extends along the main arm to the second end of the main arm, and the second end of the other medium pipe extends sequentially through the main arm and the support arm to the second end of the support arm.

[0012] In a preferred embodiment, the push cylinder includes a cylinder body and a piston head. The cylinder body is fixedly connected to the first end of the clamp arm, and the cylinder body and the piston head are slidably sleeved together. The interior of the cylinder body is divided by the piston head to form two non-communicating cavities. The two cavities are respectively connected to two medium pipelines. The push cylinder also includes a piston rod. One end of the piston rod is fixedly connected to the piston head, and the other end of the piston rod extends out of the cylinder body and is fixedly connected to the clamp head.

[0013] In a preferred embodiment, the cylinder body is provided with a cylinder port, which is slidably and sealingly connected to the piston rod. Furthermore, the cylinder body is provided with two inlets and outlets, and the two medium pipelines are respectively connected to the two inner cavities through the two inlets and outlets.

[0014] In a preferred embodiment, both the inner wall of the cylinder port and the outer wall of the plug are provided with sealing rings.

[0015] In a preferred embodiment, at least one locking mechanism is further included, the locking mechanism comprising a locking ring and a retaining ring, wherein the locking ring is threadedly sleeved on the outside of the second end of the clamp arm, the retaining ring is movably sleeved on the outside of the second end of the clamp arm via a guide assembly, and one end of the retaining ring abuts against the locking ring, and the outer cylinder is provided with a retaining tooth portion at one end facing the retaining ring, the retaining tooth portion engaging with the other end of the retaining ring.

[0016] In a preferred embodiment, the guide assembly includes at least one guide groove and at least one slider, wherein the guide groove is disposed on the outer wall of the second end of the clamp arm, and the length direction of the guide groove is consistent with the length direction of the clamp arm, the slider is fixedly connected to the retaining ring, and the slider is slidably connected to the guide groove.

[0017] Compared with the prior art, the present invention has the following advantages: By incorporating an adjustment mechanism on at least one of the clamp arms, the mechanism includes a push cylinder, a media circuit, and a drive assembly. The push cylinder is connected to the second end of the clamp head, and the drive assembly is connected to the push cylinder via the media circuit. During surgery, when the surgeon controls the clamp head to clamp the bone using the clamp arm, the drive assembly can drive the fluid in the media circuit to flow into the push cylinder along a first or second path. This causes the output shaft of the push cylinder and the connected clamp head to move in the direction of increasing or decreasing the clamp jaw size, thereby adjusting the jaw size to fit bones of different sizes. Furthermore, in cases where the clamp jaw needs to be inserted into the body through an incision for surgery, by placing the push cylinder at the first end of the clamp arm and the drive assembly at the second end, the first end of the clamp arm and the clamp head can be inserted into the body through the surgical incision during surgery, while the second end of the clamp arm and the drive assembly are exposed outside the body. This allows the surgeon to adjust the jaw size outside the body using the drive assembly, making the operation convenient and quick, effectively improving the success rate of the surgery. Moreover, the angle between the two clamp arms remains constant during the adjustment of the jaw size, effectively avoiding secondary injuries. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 A magnified view of part A in the middle; Figure 4 For the present invention Figure 2 A magnified view of part B in the middle section; Figure 5 This is a partial exploded view of the structure of the present invention.

[0020] Reference numerals: clamp head-1; clamp arm-2, main arm-21, support arm-22; push cylinder-3, cylinder body-31, cylinder port-311, inlet / outlet-312, piston head-32, inner cavity-33, piston rod-34; medium circuit-4; drive assembly-5, fluid pushing component-51, outer cylinder-511, middle collar-512, inner rod-513, plug-514, chamber-52; locking mechanism-6, locking ring-61, retaining ring-62, guide assembly-63, guide groove-631, slider-632, retaining tooth part-64. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Reference Figures 1-5 An orthopedic reduction forceps includes two forceps heads 1 and two forceps arms 2 hinged together, wherein the first end of one forceps arm 2 is movably connected to one of the forceps heads 1 through an adjustment mechanism, and the first end of the other forceps arm 2 is fixedly connected to the other forceps head 1 or movably connected to the other forceps head 1 through an adjustment mechanism. In one embodiment, the first end of one of the clamp arms 2 is movably connected to one of the clamp heads 1 via an adjustment mechanism, and the first end of the other clamp arm 2 is fixedly connected to the other clamp head 1, so that one of the clamp heads 1 of the reset clamp is adjustable; In another embodiment, the first end of one of the clamp arms 2 is movably connected to one of the clamp heads 1 via an adjustment mechanism, and the first end of the other clamp arm 2 is movably connected to the other clamp head 1 via an adjustment mechanism, so that both clamp heads 1 of the reset clamp are adjustable.

[0025] Furthermore, the adjustment mechanism includes a push cylinder 3, a medium circuit 4, and a drive assembly 5. The push cylinder 3 is located at the first end of the clamp arm 2, and its output shaft is connected to the second end of the clamp head 1. The drive assembly 5 is located at the second end of the clamp arm 2, and its drive assembly 5 is connected to the push cylinder 3 via the medium circuit 4. The drive assembly 5 is used to drive the fluid in the medium circuit 4 to flow into the push cylinder 3 along a first or second path, thereby controlling the output shaft of the push cylinder 3 and the clamp head 1 to move in the direction of increasing or decreasing the clamping jaws. This allows the doctor to change the size of the jaws of the repositioning forceps as needed to adapt to bones of different sizes. Especially when facing situations where the jaws need to be inserted into the body through a surgical incision, the two clamp heads 1 can be inserted into the body through a smaller surgical incision. The clamp heads 1 can then be controlled to move in the direction of increasing the clamping jaws, allowing the forceps to clamp larger bones without changing the angle between the two clamp arms 2. This avoids the surgical incision from being enlarged and reduces the occurrence of secondary injuries.

[0026] During the surgery, the surgeon controls the clamp head 1 to clamp the bone via the clamp arm 2. As needed, the fluid in the medium circuit 4 can be driven by the drive component 5 to flow into the push cylinder 3 along a first or second path. This causes the output shaft of the push cylinder 3 and the connected clamp head 1 to move in the direction of increasing or decreasing the clamp size, thereby adjusting the clamp size to fit bones of different sizes. Furthermore, the push cylinder 3 is located at the first end of the clamp arm 2, and the drive component 5 is located at the second end of the clamp arm 2. During the surgery, the first end of the clamp arm 2 and the clamp head 1 can be inserted into the body through the surgical incision, while the second end of the clamp arm 2 and the drive component 5 are exposed outside the body. This allows the surgeon to adjust the clamp size outside the body using the drive component 5, making the operation convenient and quick, and effectively improving the success rate of the surgery.

[0027] In this embodiment, the first end of the clamp arm 2 is the end that contacts the patient, and the second end of the clamp arm 2 is the end that the doctor holds; the push cylinder 3 is a pneumatic cylinder and the fluid in the medium circuit 4 is gas, or the push cylinder 3 is a hydraulic cylinder and the fluid in the medium circuit 4 is liquid.

[0028] Reference Figure 4 and Figure 5 The drive assembly 5 includes a fluid pusher 51 and two chambers 52. The two chambers 52 are arranged opposite to each other and are fixedly connected to the second end of the clamp arm 2. The opposite ends of the two chambers 52 are connected to the medium circuit 4. The two ends of the fluid pusher 51 are respectively movably sleeved with the adjacent ends of the two chambers 52. When the fluid pusher 51 moves along the chambers 52, the fluid in the medium circuit 4 flows into one of the chambers 52 and the fluid in the other chamber 52 flows into the medium circuit 4.

[0029] Specifically, fluid fills the medium circuit 4, the push cylinder 3, and the two chambers 52. When the fluid pusher 51 moves along its axial direction, the positions of its two ends extending into the corresponding chambers 52 change synchronously. That is, the depth of one end of the fluid pusher 51 extending into the corresponding chamber 52 increases, and the space in the chamber 52 that can hold fluid decreases, so that the fluid in the chamber 52 flows out of the chamber 52 and into the medium circuit 4. Correspondingly, the depth of the other end of the fluid pusher 51 extending into the corresponding chamber 52 decreases, and the space in the chamber 52 that can hold fluid increases, so that the fluid in the medium circuit 4 flows into the chamber 52.

[0030] Furthermore, the medium circuit 4 includes two medium pipes, one end of which is connected to the two inner cavities 33 of the push cylinder 3, and the other end of which is connected to the opposite ends of the two compartments 52.

[0031] Specifically, one chamber 52 is connected to one of the inner cavities 33 of the push cylinder 3 via one of the media pipes to form a first path, and the other chamber 52 is connected to another inner cavity 33 of the push cylinder 3 via another media pipe to form a second path. Both media pipes, the two inner cavities 33 of the push cylinder 3, and the two chambers 52 are filled with fluid. When the doctor controls the fluid pusher 51 to move towards the forceps head 1, the first end of the fluid pusher 51 moves to a deeper position in the corresponding chamber 52, causing the fluid in the first path to also move towards the forceps head 1. This drives more fluid in the first path into the corresponding inner cavity 33 and pushes the fluid in the other inner cavity 33 out of the push cylinder 3 through the piston head 32 of the push cylinder 3, and moves along the second path away from the forceps head 1, causing the forceps head 1 to move in the direction of narrowing the jaws. Correspondingly, controlling the fluid pusher 51 to move away from the forceps head 1 can drive the forceps head 1 to move in the direction of widening the jaws. Thus, by controlling the movement of the fluid pusher 51, the effect of adjusting the jaw size can be achieved.

[0032] Preferably, the medium conduit is a channel opened inside the clamp arm 2 and extending along the length of the clamp arm 2, or the medium conduit is a conduit embedded inside the clamp arm 2.

[0033] Furthermore, the fluid pushing component 51 includes an outer cylinder 511, a middle collar 512, an inner rod 513, and two plugs 514. The two ends of the outer cylinder 511 are respectively sleeved on the outer sides of the two chambers 52, and the outer cylinder 511 is threadedly connected to the chambers 52. The middle part of the inner rod 513 is fixedly sleeved on the inner side of the outer cylinder 511 through the middle collar 512, and the two ends of the inner rod 513 are respectively rotatably connected to the two plugs 514. The plugs 514 are movably and sealingly sleeved on the inner side of the chambers 52.

[0034] Preferably, the outer cylinder 511, the middle collar 512, and the inner rod 513 are integrally formed. When the outer cylinder 511 is rotated, the middle collar 512 and the inner rod 513 rotate synchronously. Since the outer cylinder 511 is threadedly connected to the outer wall of the chamber 52, the outer cylinder 511, the middle collar 512, and the inner rod 513 will move along the axial direction while rotating, which will drive the two plugs 514 to move synchronously, thereby changing the position of the plugs 514 in the chamber 52 and thus promoting the flow of fluid.

[0035] Reference Figure 2 and Figure 5 The clamp arm 2 includes a main arm 21 and a support arm 22. The first end of the main arm 21 is fixedly connected to the clamp head 1 or the push cylinder 3. The first end of the support arm 22 is fixedly connected to the main arm 21, and the second end of the support arm 22 is opposite to the second end of the main arm 21. The two chambers 52 are respectively fixedly disposed at the second ends of the main arm 21 and the support arm 22. The second end of one medium pipe extends along the main arm 21 to the second end of the main arm 21, and the second end of the other medium pipe extends sequentially through the main arm 21 and the support arm 22 to the second end of the support arm 22.

[0036] Specifically, the support arm 22 is arc-shaped. On the one hand, this allows the second end of the support arm 22 to be opposite to the second end of the main arm 21 after bending, thereby making the two compartments 52, which are respectively fixed to the second end of the main arm 21 and the second end of the support arm 22, opposite to each other. On the other hand, the second end of the support arm 22 is connected to the second end of the main arm 21 through the drive assembly 5 to form a closed ring structure. When in use, the doctor's fingers can pass through the above-mentioned ring structure, making operation more convenient.

[0037] Reference Figure 3 The push cylinder 3 includes a cylinder body 31 and a piston head 32. The cylinder body 31 is fixedly connected to the first end of the clamp arm 2. The cylinder body 31 and the piston head 32 are slidably sleeved together. The interior of the cylinder body 31 is divided by the piston head 32 to form two non-communicating inner cavities 33. The two inner cavities 33 are respectively connected to the two medium pipelines. The push cylinder 3 also includes a piston rod 34. One end of the piston rod 34 is fixedly connected to the piston head 32, and the other end of the piston rod 34 extends out of the cylinder body 31 and is fixedly connected to the clamp head 1.

[0038] Specifically, when fluid enters the corresponding inner cavity 33 from the first path or the second path, the amount of fluid in the inner cavity 33 increases, which pushes the piston head 32 to move and squeezes the fluid in the other inner cavity 33 out of the cylinder body 31. When the piston head 32 moves, it drives the piston rod 34 to extend and retract synchronously, thereby achieving the effect of controlling the movement of the clamp head 1.

[0039] Furthermore, the cylinder body 31 is provided with a cylinder port 311, which is slidably and sealingly connected to the piston rod 34. In addition, the cylinder body 31 is provided with two inlets and outlets 312, and the two medium pipelines are respectively connected to the two inner cavities 33 through the two inlets and outlets 312.

[0040] Specifically, two inlets and outlets 312 are respectively located at both ends of the cylinder body 31. The sliding range of the piston head 32 is between the two inlets and outlets 312. When fluid flows into the corresponding inner cavity 33 from the inlet and outlet 312 located on the cylinder body 31 near the jaw 1, the fluid in the inner cavity 33 increases, pushing the piston head 32 to move away from the jaw 1, and driving the piston rod 34 to move along the cylinder opening 311 in the direction of retracting into the cylinder body 31, thereby pulling the jaw 1 to move in the direction of narrowing jaws. Similarly, when fluid flows into the corresponding inner cavity 33 from the inlet and outlet 312 located on the cylinder body 31 away from the jaw 1, the fluid in the inner cavity 33 increases, pushing the piston head 32 to move closer to the jaw 1, and driving the piston rod 34 to move along the cylinder opening 311 in the direction of extending out of the cylinder body 31, thereby pushing the jaw 1 to move in the direction of widening jaws.

[0041] Furthermore, the inner wall of the cylinder port 311 and the outer wall of the plug 514 are both provided with sealing rings. The sealing rings are made of silicone or rubber materials, which can effectively improve the sealing performance of the adjustment structure and reduce the possibility of fluid leakage to the outside.

[0042] Reference Figure 1 , Figure 4 and Figure 5 The orthopedic reduction forceps also includes at least one locking mechanism 6, which includes a locking ring 61 and a retaining ring 62. The locking ring 61 is threaded onto the outside of the second end of the forceps arm 2, and the retaining ring 62 is movably fitted onto the outside of the second end of the forceps arm 2 via a guide assembly 63. One end of the retaining ring 62 abuts against the locking ring 61. Furthermore, the outer cylinder 511 has a retaining tooth 64 at one end facing the retaining ring 62, and the retaining tooth 64 engages with the other end of the retaining ring 62.

[0043] Specifically, the retaining ring 62 has a serrated surface at one end of the outer cylinder 511, which allows it to engage with the retaining tooth portion 64. When the rotating drive assembly 5 is used to adjust the jaws to the required size, the retaining ring 62 is pushed towards the outer cylinder 511 until the serrated surface of the retaining ring 62 engages with the retaining tooth portion 64, thereby restricting the rotational freedom of the drive assembly 5 and effectively preventing it from rotating unintentionally. Furthermore, the outer wall of the second end of the clamp arm 2 is provided with an external thread, and the locking ring 61 is threadedly connected to the clamp arm 2 through the external thread. When the retaining ring 62 engages with the retaining tooth portion 64, the locking ring 61 is rotated to move towards the retaining ring 62 until the locking ring 61 tightly abuts against the end of the retaining ring 62 away from the outer cylinder 511, thereby restricting the movement freedom of the retaining ring 62 and preventing the retaining ring 62 from moving away from the outer cylinder 511 and disengaging from the retaining tooth portion 64 unintentionally.

[0044] Preferably, the outer walls of the locking ring 61 and the outer cylinder 511 are provided with multiple vertical lines extending along their axial direction, which can effectively improve the frictional force when they rotate and come into contact with the human body; the outer wall of the retaining ring 62 is provided with multiple annular lines surrounding the outer side of its axial direction, which can effectively improve the frictional force when it moves and comes into contact with the human body.

[0045] Furthermore, the guide assembly 63 includes at least one guide groove 631 and at least one slider 632. The guide groove 631 is located on the outer wall of the second end of the clamp arm 2, and the length direction of the guide groove 631 is consistent with the length direction of the clamp arm 2. The slider 632 is fixedly connected to the retaining ring 62, and the slider 632 is slidably connected to the groove, thereby restricting the degree of freedom of the retaining ring 62 and ensuring that the retaining ring 62 can only move along the guide groove 631 in the direction of approaching or moving away from the outer cylinder 511, preventing it from rotating axially. As a result, when the retaining ring 62 is engaged with the retaining tooth 64, the outer cylinder 511 cannot rotate, thus achieving a locking effect.

[0046] Preferably, there are four guide grooves 631 and four sliders 632, which are distributed at equal angles around the outside of the clamp arm 2, resulting in better stability in limiting and guiding.

[0047] Working principle of this invention: In use, the doctor controls the clamp head 1 through the clamp arm 2, allowing the jaws of the orthopedic reduction clamp to open and close to clamp the bone. As needed, the outer cylinder 511 can be rotated, causing the middle collar 512 and inner rod 513 to rotate synchronously and move along the axial direction towards the clamp head 1. This causes the two plugs 514 to move synchronously, positioning the plug 514 at the first end of the inner rod 513 deeper into the corresponding chamber 52. This pushes fluid along the first path into the inner cavity 33 of the push cylinder 3 near the clamp head 1, thereby pushing the piston head 32 away from the clamp head 1 and causing the piston rod 34 to retract synchronously, thus pulling the clamp head 1 towards a narrowing jaw direction. Similarly, rotating the outer cylinder 511 in reverse reverses the rotation of the middle collar 512 and inner rod 513, causing them to rotate synchronously and move along the axial direction away from the clamp head 1, thus pushing the piston head 32 away from the clamp head 1. The two plugs 514 move synchronously, causing the plug 514 at the second end of the inner rod 513 to be positioned deeper in the corresponding chamber 52. This pushes fluid along the second path into the inner cavity 33 of the push cylinder 3, away from the jaw 1, thereby pushing the piston head 32 towards the jaw 1 and causing the piston rod 34 to extend synchronously, thus pushing the jaw 1 towards a larger jaw size. Once the jaw is adjusted to the desired size, the retaining ring 62 is pushed towards the outer cylinder 511 until the serrated surface of the retaining ring 62 engages with the retaining tooth 64. Then, the locking ring 61 is rotated, moving it towards the retaining ring 62 until the locking ring 61 tightly abuts against the end of the retaining ring 62 away from the outer cylinder 511, thereby locking the drive assembly 5 and preventing it from rotating unplanned, thus effectively improving the stability of the jaw size. Therefore, in use, this invention allows for convenient and quick adjustment of the jaw size by rotating the outer cylinder 511 outside the human body, adapting to bones of different sizes and effectively improving the success rate of surgery.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An orthopedic reduction clamp, characterized in that: It includes two pliers (1) and two pliers arms (2) hinged to each other. The first end of one of the pliers arms (2) is movably connected to one of the pliers (1) through an adjustment mechanism, and the first end of the other pliers arm (2) is fixedly connected to the other pliers (1) or movably connected to the other pliers (1) through an adjustment mechanism. The adjustment mechanism includes a push cylinder (3), a medium circuit (4), and a drive assembly (5). The push cylinder (3) is located at the first end of the clamp arm (2), and the output shaft of the push cylinder (3) is connected to the second end of the clamp head (1). The drive assembly (5) is located at the second end of the clamp arm (2), and the drive assembly (5) is connected to the push cylinder (3) through the medium circuit (4). It is used to drive the fluid in the medium circuit (4) to flow into the push cylinder (3) along a first path or a second path, so as to control the output shaft of the push cylinder (3) and the clamp head (1) to move in the direction of increasing or decreasing the jaws.

2. The orthopedic reduction forceps according to claim 1, characterized in that: The drive assembly (5) includes a fluid pusher (51) and two chambers (52). The two chambers (52) are arranged opposite to each other and are fixedly connected to the second end of the clamp arm (2). The opposite ends of the two chambers (52) are connected to the medium circuit (4). The two ends of the fluid pusher (51) are movably sleeved with the adjacent ends of the two chambers (52). When the fluid pusher (51) moves along the chamber (52), the fluid in the medium circuit (4) flows into one of the chambers (52) and the fluid in the other chamber (52) flows into the medium circuit (4).

3. The orthopedic reduction forceps according to claim 2, characterized in that: The fluid pusher (51) includes an outer cylinder (511), a middle collar (512), an inner rod (513), and two plugs (514). The two ends of the outer cylinder (511) are respectively sleeved on the outside of the two chambers (52), and the outer cylinder (511) is threadedly connected to the chambers (52). The middle part of the inner rod (513) is fixedly sleeved on the inside of the outer cylinder (511) through the middle collar (512), and the two ends of the inner rod (513) are respectively rotatably connected to the two plugs (514). The plugs (514) are movably and sealingly sleeved on the inside of the chambers (52).

4. The orthopedic reduction forceps according to claim 3, characterized in that: The medium circuit (4) includes two medium pipes. One end of each medium pipe is connected to the two inner cavities (33) of the push cylinder (3), and the other end of each medium pipe is connected to the opposite end of each of the two compartments (52).

5. The orthopedic reduction forceps according to claim 4, characterized in that: The clamp arm (2) includes a main arm (21) and a support arm (22). The first end of the main arm (21) is fixedly connected to the clamp head (1) or the push cylinder (3). The first end of the support arm (22) is fixedly connected to the main arm (21), and the second end of the support arm (22) is opposite to the second end of the main arm (21). Two compartments (52) are respectively fixedly installed at the second ends of the main arm (21) and the support arm (22). The second end of one medium pipe extends along the main arm (21) to the second end of the main arm (21), and the second end of the other medium pipe extends sequentially through the main arm (21) and the support arm (22) to the second end of the support arm (22).

6. The orthopedic reduction forceps according to claim 4, characterized in that: The push cylinder (3) includes a cylinder body (31) and a piston head (32). The cylinder body (31) is fixedly connected to the first end of the clamp arm (2). The cylinder body (31) and the piston head (32) are slidably sleeved together. The interior of the cylinder body (31) is divided by the piston head (32) to form two non-communicating inner cavities (33). The two inner cavities (33) are respectively connected to the two medium pipelines. The push cylinder (3) also includes a piston rod (34). One end of the piston rod (34) is fixedly connected to the piston head (32), and the other end of the piston rod (34) extends out of the cylinder body (31) and is fixedly connected to the clamp head (1).

7. The orthopedic reduction forceps according to claim 6, characterized in that: The cylinder body (31) is provided with a cylinder port (311), the cylinder port (311) is slidably sealed to the piston rod (34), and the cylinder body (31) is provided with two inlets and outlets (312), and the two medium pipelines are respectively connected to the two inner cavities (33) through the two inlets and outlets (312).

8. The orthopedic reduction forceps according to claim 7, characterized in that: The inner wall of the cylinder port (311) and the outer wall of the plug (514) are both provided with sealing rings.

9. An orthopedic reduction clamp according to any one of claims 3 to 8, characterized in that: It also includes at least one locking mechanism (6), which includes a locking ring (61) and a retaining ring (62). The locking ring (61) is threaded onto the outside of the second end of the clamp arm (2). The retaining ring (62) is movably fitted onto the outside of the second end of the clamp arm (2) via a guide assembly (63). One end of the retaining ring (62) abuts against the locking ring (61). Furthermore, the outer cylinder (511) has a retaining tooth (64) at one end facing the retaining ring (62), and the retaining tooth (64) engages with the other end of the retaining ring (62).

10. The orthopedic reduction forceps according to claim 9, characterized in that: The guide assembly (63) includes at least one guide groove (631) and at least one slider (632). The guide groove (631) is located on the outer wall of the second end of the clamp arm (2), and the length direction of the guide groove (631) is consistent with the length direction of the clamp arm (2). The slider (632) is fixedly connected to the retaining ring (62), and the slider (632) is slidably connected to the guide groove (631).

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