A aiming device for a transosseous fixation pin

Abstract

The present invention discloses an aiming device for a bone-piercing fixing needle, which includes an aiming rod, a starting rod and an ending rod. The aiming rod, the starting rod and the ending rod are connected together at the top to achieve the coplanarity and rotation of the three rods. The aiming rod, the starting rod and the ending rod are respectively provided with an aiming hole, a starting needle hole and an ending needle hole. The aiming rod, the starting rod and the ending rod are all telescopic rods. By adjusting the lengths of the aiming rod, the starting rod and the ending rod and rotating the three rods, the positions of the three holes on the same plane are adjusted to ensure that when the bone-piercing fixing needle is inserted, the aiming hole, the starting needle hole and the ending needle hole are located on the same straight line. The aiming device for the bone-piercing fixing needle disclosed by the present invention improves the accuracy of the bone-piercing fixing needle along a straight line during the bone-piercing process, enables the starting point and the ending point of the bone-piercing fixing needle on the fixing ring and the piercing point of the bone-piercing fixing needle on the bone to meet the requirement of three-point collinearity, and can ensure that the bone-piercing fixing needle reaches the accurate position of the fixing ring according to the specified position.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to an aiming device for a bone-penetrating fixation needle. Background Art

[0002] Currently, steel needles such as Kirschner wires and Steinmann pins are often used as bone-penetrating fixation needles, and the bone-penetrating fixation needles are implanted to connect the bone and the external fixator.

[0003] The entry point and the end point of the bone-penetrating fixation needle fixed on the fixation ring and the piercing point of the bone-penetrating fixation needle on the bone mass must all be on the same straight line. Otherwise, the fixation needle will bend and fail to play the role of tension fixation, resulting in fixation loosening and orthopedic failure.

[0004] In order to meet the requirement that the entry point and the end point of the bone-penetrating fixation needle fixed on the fixation ring and the piercing point of the bone-penetrating fixation needle on the bone mass are collinear, an aiming device is required. However, the current aiming device has low accuracy, resulting in the aiming device being unable to penetrate the bone mass at one time, thus failing to meet the requirement that the entry point and the end point of the bone-penetrating fixation needle on the fixation ring and the piercing point of the bone-penetrating fixation needle on the bone mass are collinear. Summary of the Invention

[0005] The purpose of the present invention is to provide an aiming device for a bone-penetrating fixation needle to solve the problem of low accuracy of the aiming device.

[0006] The present invention provides an aiming device for a bone-penetrating fixation needle, which is used to assist in fixing the bone-penetrating fixation needle on the fixation ring. The aiming device includes an aiming rod, a starting rod, and a terminating rod. The aiming rod, the starting rod, and the terminating rod are connected together at the top to achieve the coplanarity and rotation of the three rods. The aiming rod, the starting rod, and the terminating rod are respectively provided with an aiming hole, a starting needle hole, and a terminating needle hole. The aiming rod, the starting rod, and the terminating rod are all telescopic rods. By adjusting the lengths of the aiming rod, the starting rod, and the terminating rod and rotating the three rods, the positions of the aiming hole, the starting needle hole, and the terminating needle hole in the same plane are adjusted to ensure that when the bone-penetrating fixation needle is inserted, the aiming hole, the starting needle hole, and the terminating needle hole can be located on the same straight line.

[0007] Preferably, the bottom ends of the starting rod and the terminating rod are arranged on the fixation ring of the external fixator, and the bottom end of the aiming rod is arranged outside the fixation ring of the external fixator. Among them, the bottom ends of the starting rod and the terminating rod are respectively configured with a starting rod fixation ring connection device and a terminating rod fixation ring connection device. The starting rod fixation ring connection device and the terminating rod fixation ring connection device are connected to the fixation ring by bolts, and the bottom ends of the starting rod and the terminating rod are detachably and fixedly connected to the starting rod fixation ring connection device and the terminating rod fixation ring connection device respectively.

[0008] Preferably, both the starting rod fixing ring connecting device and the ending rod fixing ring connecting device include bolts, and the starting rod and the ending rod are fixedly connected to the fixing ring by bolts; the starting pinhole and the ending pinhole are respectively arranged on the bolts of the starting rod fixing ring connecting device and the bolts of the ending rod fixing ring connecting device.

[0009] Preferably, both the starting rod fixing ring connecting device and the ending rod fixing ring connecting device further include a clamping member. The bolt has a bolt head. A bolt head groove is provided on the bottom surface of the clamping member. The bolt head is arranged in the bolt head groove, and one side of the bolt head abuts against the inner wall of the side surface of the bolt head groove, and there is a receiving space between the other side of the bolt head and the inner wall of the side surface of the bolt head groove to form a movable side; a clamping rod is arranged on the side surface of the bolt head groove on the movable side of the bolt head. The inner end of the clamping rod abuts against the side wall of the bolt head in the bolt head groove. The outer end of the clamping rod extends out of the bolt head groove and its exposed end is configured with a pull head; a return spring is sleeved on the clamping rod, and the two ends of the return spring are respectively fixedly connected to the side wall of the bolt head and the inner wall of the side surface of the bolt head groove.

[0010] Preferably, a pivot is provided on the upper surface of the clamping member. Two pivot end fixing portions are respectively protruded at both ends of the upper surface of the clamping member. Pivot holes are provided in both of the two pivot end fixing portions. Both ends of the pivot are respectively arranged in the pivot holes of the two pivot end fixing portions; the bottom ends of the starting rod and the ending rod are respectively fixedly connected to the pivot on the upper surface of the clamping member of the starting rod fixing ring connecting device and the pivot on the upper surface of the clamping member of the ending rod fixing ring connecting device; both ends of the pivot are respectively connected by bearings to the two pivot end fixing portions.

[0011] Preferably, continuous holes are provided on the aiming rod, the starting rod and the ending rod. When the telescopic rod is extended to the target length, it is fixed by a pin on the continuous holes to achieve locking.

[0012] Preferably, an operating handle is provided at the connection of the tops of the aiming rod, the starting rod and the ending rod. The operating handle includes two parallel semi-circular plates. A number of rotation holes are correspondingly provided on the two semi-circular plates. When the positions of the tops of the aiming rod, the starting rod and the ending rod on the operating handle are determined, they are fixed to the rotation holes of the operating handle by pins.

[0013] Preferably, a guiding needle is further included. Guiding needle holes are provided at the bottom ends of the aiming rod, the starting rod and the ending rod. And the guiding needle hole of the aiming rod is located above the aiming hole. The guiding needle holes of the starting rod and the ending rod are respectively located above the starting pinhole and the ending pinhole. When the guiding needle passes through the guiding needle holes of the aiming rod, the starting rod and the ending rod, the aiming hole, the starting pinhole and the ending pinhole are approximately located on the same straight line.

[0014] Preferably, the aiming rod, the starting rod, and the terminating rod are attached to the fixing ring of the external fixator. The tops of the aiming rod, the starting rod, and the terminating rod are pivotally connected by a rotating shaft, and the rotating shaft is arranged on the fixing ring. The aiming rod, the starting rod, and the terminating rod are fixed to the fixing ring only by bolts and their matching nuts.

[0015] Preferably, the starting pinhole and the terminating pinhole are respectively arranged in the middle or lower part of the starting rod and the terminating rod; the aiming hole of the aiming rod is long and narrow.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention discloses an aiming device for a bone-penetrating fixing needle. The aiming rod, the starting rod, and the terminating rod are connected together at the top, ensuring the coplanarity of the three rods. The aiming rod, the starting rod, and the terminating rod are all telescopic rods. By adjusting the lengths of the aiming rod, the starting rod, and the terminating rod and rotating the three rods, the positions of the aiming hole, the starting pinhole, and the terminating pinhole on the same plane are adjusted, thereby ensuring that the three holes on the three rods are not only coplanar but also collinear. When the bone-penetrating fixing needle first passes through the aiming hole and then through the starting pinhole, since the two points of the aiming hole and the starting pinhole have determined a straight line, and the bone to be penetrated by the bone-penetrating fixing needle and the terminating pinhole are both located on this straight line, compared with the doctor manually inserting the needle without the guidance of the aiming hole, the aiming device for the bone-penetrating fixing needle disclosed by the present invention improves the accuracy of the bone-penetrating fixing needle along the straight line during the bone-penetrating process. The aiming device for the bone-penetrating fixing needle disclosed by the present invention adjusts the aiming hole, the starting pinhole, the bone, and the terminating pinhole to a straight line before bone penetration, improves the accuracy of the bone-penetrating fixing needle along the straight line during the bone-penetrating process, enables the starting point and the ending point of the bone-penetrating fixing needle on the fixing ring and the piercing point of the bone-penetrating fixing needle on the bone mass to meet the requirement of three points being collinear, and can ensure that the bone-penetrating fixing needle reaches the accurate position of the fixing ring according to the specified position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the aiming device for the bone-penetrating fixing needle provided in Embodiment 1 of the present invention when used on an external fixator;

[0019] Figure 2 Side view of the aiming device for the bone-penetrating fixing needle provided in Embodiment 1 of the present invention when only the bone-penetrating fixing needle is inserted;

[0020] Figure 3 Side view of the aiming device for the bone-penetrating fixing needle provided in Embodiment 1 of the present invention when both the bone-penetrating fixing needle and the guiding needle are inserted;

[0021] Figure 4 Schematic diagram of the connection structure of the starting rod fixing ring connection device with the starting rod and the fixing ring provided in Embodiment 1 of the present invention;

[0022] Figure 5 This is a schematic structural diagram of the aiming rod provided in Embodiment 1 of the present invention;

[0023] Figure 6 This is a top view of the aiming device for the bone-penetrating fixation needle provided in Embodiment 2 of the present invention when connected to the external fixator.

[0024] Explanation of reference numerals: 100 - external fixator, 101 - fixing ring, 102 - connecting rod; 200 - bone;

[0025] 1 - aiming rod, 2 - starting rod, 3 - ending rod, 300 - bone-penetrating fixation needle, 400 - guiding needle, 401 - guiding needle hole;

[0026] 11 - aiming hole, 21 - starting rod fixing ring connecting device, 31 - ending rod fixing ring connecting device, 210 - starting needle hole, 310 - ending needle hole;

[0027] 4 - bolt, 41 - bolt head, 40 - nut;

[0028] 5 - clamping member, 51 - bolt head groove, 52 - clamping rod, 53 - pulling head, 54 - return spring, 6 - pivot, 7 - operating handle, 8 - rotating shaft. Detailed implementation manners

[0029] The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0030] Embodiment 1: An aiming device for a bone-penetrating fixation needle

[0031] Embodiment 1 provides an aiming device for a bone-penetrating fixation needle, which is used to fix the bone-penetrating fixation needle 300 on the fixing ring 101 of the external fixator 100. The following is a detailed description of its structure.

[0032] Referring to Figure 1 , the external fixator 100 includes two fixing rings 101. A plurality of bolt holes are circumferentially and spacedly arranged on each fixing ring 101. The fixing rings 101 are parallel to each other, and the two fixing rings 101 are detachably connected by three connecting rods 102. Specifically, the connecting rod 102 is a threaded screw rod. The connecting rod 102 is inserted through the bolt holes of the fixing ring 101 and fixed by a matching nut. Thus, the two fixing rings 101 and the three connecting rods 102 are assembled into the external fixator 100 by bolt connection.

[0033] Referring to Figures 1 to 3 , the aiming device for the bone-penetrating fixation needle includes an aiming rod 1, a starting rod 2, and an ending rod 3.

[0034] The bottom ends of the starting rod 2 and the ending rod 3 are arranged on the fixing ring 101 of the external fixing frame 100, the bottom end of the aiming rod 1 is arranged outside the fixing ring 101 of the external fixing frame 100, and the top ends of the aiming rod 1, the starting rod 2 and the ending rod 3 are connected together and the three rods are coplanar.

[0035] The bottom end of the aiming rod 1 is provided with an aiming hole 11 for passing through the bone-piercing fixing needle 300.

[0036] The bottom ends of the starting rod 2 and the ending rod 3 are respectively provided with a starting rod fixing ring connecting device 21 and an ending rod fixing ring connecting device 31. The starting rod fixing ring connecting device 21 and the ending rod fixing ring connecting device 31 are connected to the fixing ring 101 by bolts. The bottom ends of the starting rod 2 and the ending rod 3 are respectively detachably and fixedly connected to the starting rod fixing ring connecting device 21 and the ending rod fixing ring connecting device 31, so as to realize the detachable and fixed connection between the starting rod 2 and the ending rod 3 and the fixing ring 101.

[0037] Specifically, referring to Figure 2 and Figure 3 both the starting rod fixing ring connecting device 21 and the ending rod fixing ring connecting device 31 include a bolt 4. The bolt 4 has a bolt head 41 and is equipped with a nut 40.

[0038] Combined with Figure 4 a starting needle hole 210 is arranged on the bolt 4 of the starting rod fixing ring connecting device 21 for passing through the bone-piercing fixing needle 300. The starting rod fixing ring connecting device 21 is fixed to the fixing ring 101 of the external fixing frame 100 by the bolt 4 and its nut 40. The bottom end of the starting rod 2 is detachably connected to the bolt head 41 of the bolt 4 of the starting rod fixing ring connecting device 21.

[0039] Specifically, continuing to refer to Figure 2 and Figure 3 an ending needle hole 310 is arranged on the bolt 4 of the ending rod fixing ring connecting device 31 for passing through the bone-piercing fixing needle 300. The ending rod fixing ring connecting device 31 is fixed to the fixing ring 101 of the external fixing frame 100 by the bolt 4 and its nut 40. The bottom end of the ending rod 3 is detachably connected to the bolt head 41 of the bolt 4 of the ending rod fixing ring connecting device 31.

[0040] The aiming hole 11, the starting needle hole 210 and the ending needle hole 310 are sequentially located on the same straight line.

[0041] In order to realize the detachable and fixed connection between the starting rod 2, the ending rod 3 and the fixing ring 101, a specific implementation manner is that both the starting rod fixing ring connecting device 21 and the ending rod fixing ring connecting device 31 further include a clamping member 5. Referring to Figure 4, a bolt head groove 51 is provided on the bottom surface of the clamping member 5, the bolt head 41 is arranged in the bolt head groove 51, and one side of the bolt head 41 abuts against the inner wall of the side surface of the bolt head groove 51, and a receiving space is left between the other side of the bolt head 41 and the inner wall of the side surface of the bolt head groove 51 to form a movable side.

[0042] Continue to refer to Figure 4 , a clamping rod 52 is arranged on the side surface of the bolt head groove 51 on the movable side of the bolt head 41, the inner end of the clamping rod 52 abuts against the side wall of the bolt head 41 in the bolt head groove 51, and the outer end of the clamping rod 52 extends out of the bolt head groove 51 and its exposed end is provided with a pull head 53.

[0043] Continue to refer to Figure 4 , a return spring 54 is sleeved on the clamping rod 52, and both ends of the return spring 54 are fixedly connected to the side wall of the bolt head 41 and the inner wall of the side surface of the bolt head groove 51 respectively.

[0044] When pulling the pull head 53 outwards, the accommodation space between the side wall of the movable side of the bolt head 41 and the side wall of the bolt head groove 51 increases, the clamping member 5 is sleeved on the bolt head 41 of the bolt 4 that has been pre - installed in the fixing ring 101, and the pull head 53 is released. The potential energy stored in the return spring 54 due to compression before is released, and the return spring 54 extends towards both ends until the inner end of the clamping member 5 completely abuts against and clamps the bolt head 41 of the bolt 4, thus realizing the clamping of the bolt head 41 of the bolt 4.

[0045] In order to prevent the starting rod 2 and the ending rod 3 from obstructing the line of sight or operation during bone - piercing surgery, sometimes it is necessary to adjust the spatial positions of the starting rod 2 and the ending rod 3. Therefore, the connection mode between the starting rod 2, the ending rod 3 and the fixing ring 101 is preferably pivotally connected. Specifically, a pivot 6 is provided on the upper surface of the clamping member 5, two pivot - end fixing parts are respectively protruded at both ends of the upper surface of the clamping member 5, pivot holes are provided in both of the two pivot - end fixing parts, and both ends of the pivot 6 are respectively arranged in the pivot holes of the two pivot - end fixing parts; the bottom ends of the starting rod 2 and the ending rod 3 are respectively fixedly connected to the pivot 6 on the upper surface of the clamping member 5 of the starting - rod fixing - ring connecting device 21 and the pivot 6 on the upper surface of the clamping member 5 of the ending - rod fixing - ring connecting device 31.

[0046] In order to enhance the flexibility and accuracy of the movement of the aiming rod 1, the starting rod 2 and the ending rod 3, bearings are respectively arranged between both ends of the pivot 6 and the two pivot - end fixing parts.

[0047] Specifically, the bone - piercing fixing needle 300 is preferably a Kirschner wire.

[0048] In order to realize the adjustment of the lengths of the aiming rod 1, the starting rod 2 and the ending rod 3, refer to Figure 5, the aiming rod 1, the starting rod 2, and the ending rod 3 are all telescopic rods, and the telescopic rods are provided with continuous holes. When the telescopic rods are extended to the target length, they are fixed by pins on the continuous holes to achieve locking.

[0049] In order to ensure that the aiming rod 1, the starting rod 2, and the ending rod 3 are in the same plane and can rotate in the same plane, an operating handle 7 is provided at the top connection of the aiming rod 1, the starting rod 2, and the ending rod 3. Specifically, the operating handle 7 includes two parallel semi-circular plates, and a number of rotation holes are correspondingly provided on the two semi-circular plates. The tops of the aiming rod 1, the starting rod 2, and the ending rod 3 are clamped between the two semi-circular plates. After the positions of the tops of the aiming rod 1, the starting rod 2, and the ending rod 3 on the two semi-circular plates of the operating handle 7 are determined, they are fixed to the rotation holes of the operating handle 7 by pins. This not only realizes the rotation of the tops of the aiming rod 1, the starting rod 2, and the ending rod 3 on the operating handle 7, but also ensures that the aiming rod 1, the starting rod 2, and the ending rod 3 are coplanar because the tops of the aiming rod 1, the starting rod 2, and the ending rod 3 are all located between the two parallel semi-circular plates, avoiding the situation where one rod is non-coplanar with the other two rods.

[0050] Specifically, two bolt holes at both ends of the fixing ring 101 are respectively selected as the starting bolt hole and the ending bolt hole. As a preferred implementation, the connection line of the starting bolt hole and the ending bolt hole passes through the center of the fixing ring 101 to ensure that the bone 200 to be penetrated by the bone-piercing fixing needle 300 is located between the starting bolt hole and the ending bolt hole and the three points are collinear. The starting rod fixing ring connecting device 21 and the ending rod fixing ring connecting device 31 are respectively connected to the starting bolt hole and the ending bolt hole of the fixing ring 101 by bolts. By appropriately adjusting the lengths of the aiming rod 1, the starting rod 2, and the ending rod 3, the aiming hole 11, the starting needle hole 210, the bone 200 to be penetrated, and the ending needle hole 310 can be made collinear. When the bone-piercing fixing needle 300 penetrates from the aiming hole 11, theoretically it will pass through the starting needle hole 210 along a straight line. Then when it continues to penetrate through the bone 200, finally it passes out from the ending needle hole 310, thus ensuring that the starting point and the ending point of the bone-piercing fixing needle 300 fixed on the fixing ring 101 and the piercing point of the bone-piercing fixing needle 300 on the bone 200 are collinear.

[0051] To further improve the accuracy of the bone-piercing fixing needle 300, refer to Figure 2 and Figure 3, the aiming device for the bone-piercing fixing needle further includes a guiding needle 400. Guide needle holes 401 are provided at the bottom ends of the aiming rod 1, the starting rod 2, and the terminating rod 3. To prevent the guiding needle 400 from piercing through the bone 200 and injuring the patient while facilitating the operation, the guide needle hole 401 of the aiming rod 1 should be located above the aiming hole 11, and the guide needle holes 401 of the starting rod 2 and the terminating rod 3 are respectively located above the starting needle hole 210 and the terminating needle hole 310. Before inserting the bone-piercing fixing needle 300, first insert the guiding needle 400 through the guide needle holes 401 of the aiming rod 1, the starting rod 2, and the terminating rod 3, so that the aiming hole 11, the starting needle hole 210, and the terminating needle hole 310 are approximately on the same straight line, ensuring that the bone-piercing fixing needle 300 can pass through the aiming hole 11, the starting needle hole 210, and the terminating needle hole 310, thereby improving the accuracy of the bone-piercing fixing needle 300.

[0052] Embodiment 2: A method for using an aiming device for a bone-piercing fixing needle

[0053] Embodiment 2 provides a method for using an aiming device for a bone-piercing fixing needle. The aiming device for the bone-piercing fixing needle of Embodiment 1 is adopted, and this method for use includes an installation method and a disassembly method.

[0054] Among them, the installation method includes the following steps:

[0055] Select the starting bolt hole and the terminating bolt hole on the fixing ring 101 as the positions of the starting point and the terminating point respectively;

[0056] Connect the starting rod fixing ring connecting device 21 and the terminating rod fixing ring connecting device 31 to the starting bolt hole and the terminating bolt hole of the fixing ring 101 through bolts respectively. At the same time, the bottom ends of the starting rod 2 and the terminating rod 3 are detachably and fixedly connected to the starting rod fixing ring connecting device 21 and the terminating rod fixing ring connecting device 31 respectively;

[0057] Clamp the top ends of the aiming rod 1, the starting rod 2, and the terminating rod 3 between two semi-circular plates, and adjust the positions of the top ends of the aiming rod 1, the starting rod 2, and the terminating rod 3 on the two semi-circular plates of the operating handle 7, and temporarily fix them on the rotating holes of the operating handle 7 through pins, while ensuring that the aiming rod 1, the starting rod 2, and the terminating rod 3 are coplanar;

[0058] Adjust the height and position of the guide needle holes 401 at the bottom ends of the aiming rod 1, the starting rod 2, and the terminating rod 3 by appropriately adjusting the lengths of the aiming rod 1, the starting rod 2, and the terminating rod 3, and try to make the guide needle holes 401 of the aiming rod 1, the starting rod 2, and the terminating rod 3 on the same straight line;

[0059] Tighten the nuts 40 of the bolts 4 respectively to tightly fix the bottom ends of the starting rod 2 and the terminating rod 3 on the fixing ring 101;

[0060] First, place a guide pin 400 through the guide pin hole 401 of the aiming rod 1. The guide pin 400 first passes through the guide pin hole 401 of the starting rod 2, and then through the guide pin hole 401 of the terminating rod 3, so that the aiming hole 11, the starting pin hole 210, and the terminating pin hole 310 are approximately on the same straight line;

[0061] The bone-penetrating fixation pin 300 first passes through the aiming hole 11 of the aiming rod 1, passes through the starting pin hole 210 along a straight line, and then continues to pass through the bone 200 until it exits from the terminating pin hole 310, thereby connecting the aiming hole 11 of the aiming rod 1, the starting pin hole 210 of the starting rod 2, and the terminating pin hole 310 of the terminating rod 3 into a straight line;

[0062] Respectively tighten the nuts 40 of the starting rod fixing ring connecting device 21 and the terminating rod fixing ring connecting device 31 that match the bolt 4 to fix the bone-penetrating fixation pin 300 on the fixing ring 101.

[0063] Lock the positions of the tops of the aiming rod 1, the starting rod 2, and the terminating rod 3 on the operating handle 7;

[0064] Remove the guide pin 400 and leave it on the aiming device mounting and fixing ring 101.

[0065] Since the aiming hole 11, the starting pin hole 210, and the terminating pin hole 310 are already on the same straight line during the operation process, compared with the prior art where there is no aiming hole 11 as a guide, the accuracy of the bone-penetrating fixation pin 300 along the straight line during the bone-penetrating process is improved.

[0066] When the aiming device of the bone-penetrating fixation pin needs to be disassembled, the disassembly method includes the following steps:

[0067] Pull out the pull heads 53 of the starting rod fixing ring connecting device 21 and the terminating rod fixing ring connecting device 31, disassemble the starting rod 2 and the terminating rod 3 respectively, remove the clamping parts 5 from the bolts 4 of the starting rod fixing ring connecting device 21 and the terminating rod fixing ring connecting device 31, and move out the starting rod 2 and the terminating rod 3;

[0068] Leave the bolt 4 and the nut 40, and continue to keep the bone-penetrating fixation pin 300 fixed on the fixing ring 101 until the orthopedic operation is successful.

[0069] Example 3: Another aiming device for the bone-penetrating fixation pin

[0070] Compared with the defect in Example 1 that the starting rod 2 and the terminating rod 3 obstruct the line of sight or operation during the bone-penetrating operation, in Example 3, on the basis of Example 1, the connection relationship between the aiming rod 1, the starting rod 2, and the terminating rod 3 and the connection relationship between the starting rod 2, the terminating rod 3 and the fixing ring 101 are improved. The starting rod 2 and the terminating rod 3 no longer rotate relative to the fixing ring 101, but are placed flat on the fixing ring 101. Specifically, the improvement lies in:

[0071] Reference Figure 6 The aiming rod 1, the starting rod 2 and the ending rod 3 are attached to the fixing ring 101 of the external fixator 100 to ensure that the three rods of the aiming rod 1, the starting rod 2 and the ending rod 3 are coplanar.

[0072] The aiming rod 1, the starting rod 2 and the ending rod 3 are no longer fixedly connected, and the tops of the aiming rod 1, the starting rod 2 and the ending rod 3 are pivotally connected by a rotating shaft 8. The rotating shaft 8 is arranged on the fixing ring 101.

[0073] The aiming rod 1, the starting rod 2 and the ending rod 3 are attached to the fixing ring 101. Therefore, the connection between the starting rod 2, the ending rod 3 and the fixing ring 101 no longer requires a clamping member 5. Instead, like the starting rod fixing ring connecting device 21 and the ending rod fixing ring connecting device 31, the bottoms of the aiming rod 1, the starting rod 2 and the ending rod 3 are only detachably connected to the fixing ring 101 by bolts 4. Since the bone-piercing fixing needle 300 does not pass through the bolts 4, there is no need to have needle-piercing holes on the bolts 4, but the bolts 4 and their matching nuts are required to achieve fixation together.

[0074] Similar to Embodiment 1, an aiming hole 11 is provided at the bottom end of the aiming rod 1, and starting needle holes 210 and ending needle holes 310 are respectively provided in the middle or lower part of the starting rod 2 and the ending rod 3. When piercing the bone-piercing fixing needle 300, the aiming hole 11, the starting needle hole 210 and the ending needle hole 310 should be located on the same straight line in sequence.

[0075] Among them, during the process of fixing the starting point and the ending point of the bone-piercing fixing needle 300 on the fixing ring 101, since the bone-piercing fixing needle 300 needs to pass through the bone 200, and usually, the bone 200 will be located at the longitudinal center position of the fixing ring 101 of the external fixator 100. Therefore, the piercing points of the bone-piercing fixing needle 300 on the bone 200 should be as close as possible to the center of the fixing ring 101.

[0076] To ensure that the piercing points of the bone-piercing fixing needle 300 on the bone 200 are as close as possible to the center of the fixing ring 101 and for the convenience of operation, the starting needle hole 210 and the ending needle hole 310 should be respectively arranged in the middle or lower part of the starting rod 2 and the ending rod 3 as much as possible, and the aiming rod 1 is extended so that the aiming hole 11, the starting needle hole 210 and the ending needle hole 310 are collinear.

[0077] To facilitate the piercing of the bone-piercing fixing needle 300, the aiming hole 11 provided at the bottom end of the aiming rod 1 is elongated, as Figure 5 shown.

[0078] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A aiming device for a bone-penetrating fixation pin, which is used to assist in fixing the bone-penetrating fixation pin (300) on a fixation ring (101), and is characterized in that, The aiming device includes an aiming rod (1), a starting rod (2), a terminating rod (3), and a guiding needle (400). The aiming rod (1), the starting rod (2), and the terminating rod (3) are connected together at the top to achieve coplanarity and rotation of the three rods. The aiming rod (1), the starting rod (2), and the terminating rod (3) are respectively provided with an aiming hole (11), a starting needle hole (210), and a terminating needle hole (310). The aiming hole (11) of the aiming rod (1) is elongated. The aiming rod (1), the starting rod (2), and the terminating rod (3) are all telescopic rods. By adjusting the lengths of the aiming rod (1), the starting rod (2), and the terminating rod (3) and rotating the three rods, the positions of the aiming hole (11), the starting needle hole (210), and the terminating needle hole (310) on the same plane are adjusted to ensure that when passing through the bone-piercing fixing needle (300), the aiming hole (11), the starting needle hole (210), and the terminating needle hole (310) can be located on the same straight line. The bottoms of the starting rod (2) and the terminating rod (3) are arranged on the fixing ring (101) of the external fixator (100), and the bottom of the aiming rod (1) is arranged outside the fixing ring (101) of the external fixator (100). The bottoms of the starting rod (2) and the terminating rod (3) are respectively provided with a starting rod fixing ring connecting device (21) and a terminating rod fixing ring connecting device (31). The starting rod fixing ring connecting device (21) and the terminating rod fixing ring connecting device (31) are connected to the fixing ring (101) by bolts. The bottoms of the starting rod (2) and the terminating rod (3) are respectively detachably and fixedly connected to the starting rod fixing ring connecting device (21) and the terminating rod fixing ring connecting device (31). The bottoms of the aiming rod (1), the starting rod (2), and the terminating rod (3) are all provided with guiding needle holes (401). The guiding needle hole (401) of the aiming rod (1) is located above the aiming hole (11), and the guiding needle holes (401) of the starting rod (2) and the terminating rod (3) are respectively located above the starting needle hole (210) and the terminating needle hole (310). The guiding needle (400) passes through the guiding needle holes (401) of the aiming rod (1), the starting rod (2), and the terminating rod (3) to make the aiming hole (11), the starting needle hole (210), and the terminating needle hole (310) approximately located on the same straight line.

2. The aiming device for the bone-piercing fixing needle according to claim 1, wherein The starting rod fixing ring connecting device (21) and the terminating rod fixing ring connecting device (31) both include bolts (4). The starting rod (2) and the terminating rod (3) are fixedly connected to the fixing ring (101) by bolts (4). The starting needle hole (210) and the terminating needle hole (310) are respectively arranged on the bolts (4) of the starting rod fixing ring connecting device (21) and the bolts (4) of the terminating rod fixing ring connecting device (31).

3. The aiming device for the bone-piercing fixing needle according to claim 2, wherein Both the starting rod fixing ring connecting device (21) and the terminating rod fixing ring connecting device (31) further include a clamping member (5). The bolt (4) has a bolt head (41). A bolt head groove (51) is provided on the bottom surface of the clamping member (5). The bolt head (41) is disposed in the bolt head groove (51), and one side of the bolt head (41) abuts against the inner wall of the side surface of the bolt head groove (51), while there is a receiving space left between the other side of the bolt head (41) and the inner wall of the side surface of the bolt head groove (51) to form a movable side. A clamping rod (52) is provided on the side surface of the bolt head groove (51) on the movable side of the bolt head (41). The inner end of the clamping rod (52) abuts against the side wall of the bolt head (41) in the bolt head groove (51), and the outer end of the clamping rod (52) extends out of the bolt head groove (51) and its exposed end is configured with a pull head (53). A return spring (54) is sleeved on the clamping rod (52), and the two ends of the return spring (54) are respectively fixedly connected to the side wall of the bolt head (41) and the inner wall of the side surface of the bolt head groove (51).

4. The aiming device for the bone-piercing fixing needle according to claim 3, characterized in that A pivot (6) is provided on the upper surface of the clamping member (5). Two pivot end fixing portions are respectively protruded at both ends of the upper surface of the clamping member (5). Pivot holes are provided in both of the two pivot end fixing portions. The two ends of the pivot (6) are respectively disposed in the pivot holes of the two pivot end fixing portions. The bottom ends of the starting rod (2) and the terminating rod (3) are respectively fixedly connected to the pivot (6) on the upper surface of the clamping member (5) of the starting rod fixing ring connecting device (21) and the pivot (6) on the upper surface of the clamping member (5) of the terminating rod fixing ring connecting device (31). The two ends of the pivot (6) are respectively connected by bearings to the two pivot end fixing portions.

5. The aiming device for the bone-piercing fixing needle according to claim 4, characterized in that Continuous holes are provided on the aiming rod (1), the starting rod (2) and the terminating rod (3). When the telescopic rod is extended to the target length, locking is achieved by fixing with a pin on the continuous holes.

6. The aiming device for the bone-piercing fixing needle according to claim 5, characterized in that An operating handle (7) is provided at the top connection of the aiming rod (1), the starting rod (2) and the terminating rod (3). The operating handle (7) includes two parallel semi-circular plates, and a number of rotation holes are correspondingly provided on the two semi-circular plates. When the positions of the tops of the aiming rod (1), the starting rod (2) and the terminating rod (3) on the operating handle (7) are determined, they are fixed to the rotation holes of the operating handle (7) by pins.

7. The aiming device for the bone-piercing fixing needle according to claim 1, characterized in that The aiming rod (1), the starting rod (2) and the terminating rod (3) are attached to the fixing ring (101) of the external fixing frame (100). The top ends of the aiming rod (1), the starting rod (2) and the terminating rod (3) are pivotally connected by a rotating shaft (8), the rotating shaft (8) is arranged on a fixing ring (101), and the aiming rod (1), the starting rod (2) and the terminating rod (3) are fixed to the fixing ring (101) only by bolts (4) and their matching nuts.

8. The aiming device for the bone-piercing fixing needle according to claim 7, wherein The starting needle hole (210) and the terminating needle hole (310) are respectively arranged in the middle or lower part of the starting rod (2) and the terminating rod (3).

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