Bone needle clamping block

Abstract

The utility model discloses a bone needle clamping block, which belongs to the field of medical instruments and is provided with a needle clamping seat, the needle clamping seat is provided with a first ball socket, a rotating needle clamp is arranged in the first ball socket, the rotating needle clamp is provided with a hemispherical lower clamping block, an upper clamping block and a pressing plate, a needle clamping groove is arranged between the upper clamping block and the lower clamping block and used for clamping bone needles, and the pressing plate is arranged on the upper clamping block. And the locking bolt A locks and fixes the rotating needle clamp, the needle clamp seat and the bone needle clamped by the rotating needle clamp seat. A sliding groove is further formed in the needle clamp seat, a sliding block is arranged in the sliding groove, a second ball socket is arranged on the upper surface of the sliding block, a through hole is formed in the sliding block below the second ball socket, the rotating needle clamp is also arranged in the second ball socket, a long-strip-shaped hole is formed in the needle clamp seat below the sliding groove, and a locking nut is arranged at the lower end of the long-strip-shaped hole. And the locking bolt B sequentially penetrates through the second needle clamp, the sliding block and the needle clamp seat and is matched with the locking nut to lock and fix the second needle clamp and the bone needle clamped by the second needle clamp.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a bone needle clamp. Background Art

[0002] During fracture surgery, two or more bone pins are usually fixed on the bone at each end of the fracture. It is difficult for doctors to ensure that the two bone pins are inserted into the bone in parallel and with precise spacing. The bone pin clamp block of the single-arm orthopedic external fixator currently on the market is generally provided with two fixed pin clamping grooves, which will force a pair of non-parallel bone pins to be parallel, and force their spacing to completely match the spacing of the two bone pin grooves, thereby causing the bone pins to compress the bones to produce stress, which will cause postoperative nail breakage or nail channel absorption. The nail channel absorption will cause the nails to loosen, thereby causing surgical defects such as weak fixation and bone nonunion. For example, a mounting part in an orthopedic external fixator disclosed in CN 106667560 A, a horizontal and vertical clamp block in an orthopedic external fixator disclosed in CN 2219106Y, a pin clamp bracket in a single-arm integrated orthopedic external fixator disclosed in CN 219895882 U, and a first support frame in an orthopedic external fixator for knee and elbow joints disclosed in CN 21113013027 U. Utility Model Content

[0003] The utility model discloses a bone needle clamping block, which overcomes the above defects.

[0004] The bone needle clamp block is slidably arranged on a slide rail type bracket seat of an orthopedic external fixation bracket, and the bone needle clamp block is locked and fixed to the bracket seat by a fixing bolt. The bone needle clamp block is provided with a needle clamp seat A, and a first needle clamp and a second needle clamp are provided on the needle clamp seat A. The first needle clamp and the second needle clamp are both configured as rotating needle clamps, and the rotating needle clamp is provided with a hemispherical lower clamp block, an upper clamp block and a pressure plate. The upper clamp block is arranged on the lower clamp block, and a needle clamping groove A is provided between the upper clamp block and the lower clamp block for clamping the bone needle. The pressure plate is arranged on the upper clamp block, and a first ball socket is provided at one end of the upper surface of the needle clamp seat A, and a screw hole A is provided on the needle clamp seat A below the first ball socket, and the hemispherical lower clamp block of the first needle clamp is arranged in the first ball socket, and a locking bolt A is provided on the pressure plate of the first needle clamp, and the locking bolt A passes through the pressure plate, the upper clamp block and the lower clamp block of the first needle clamp in sequence, and is tightened in the screw hole A of the needle clamp seat A to lock and fix the first needle clamp and the bone needle clamped therein.

[0005] Furthermore, a sliding groove A is provided at the other end of the upper surface of the needle clamp seat A, a sliding block is provided in the sliding groove A, a second ball socket is provided on the upper surface of the sliding block, a through hole is provided on the sliding block downward from the second ball socket, the second needle clamp is provided in the second ball socket, a long hole A is provided on the needle clamp seat A below the sliding groove A, a locking nut A is provided at the lower end of the long hole A, the bracket seat is provided with a long hole B, the locking nut A is slidably arranged in the long hole B of the bracket seat and is prevented from rotating by the long hole B, the locking bolt B passes through the second needle clamp, the sliding block and the needle clamp seat A in sequence, and cooperates with the locking nut A to lock and fix the second needle clamp and the bone needle clamped therein.

[0006] Furthermore, there are multiple bone needle clamps, and a pressurizer is provided between two adjacent bone needle clamps. Pin holes are provided at one end or both ends of the needle clamp seat A. Pin shafts are provided at both ends of the pressurizer. The pressurizer is connected to two adjacent needle clamp seats A by plugging the pin shaft into the pin hole. The pressurizer itself adopts a structure in which a screw and a screw sleeve are matched and connected. The pressurizer is extended and retracted through a spiral transmission method, thereby adjusting the distance between two adjacent bone needle clamps.

[0007] Furthermore, the bone needle clamp block is rotatably arranged on a connecting piece of an orthopedic external fixation bracket, and the connecting piece is provided with two, and a long hole C is arranged in the connecting piece, and adjusting bolts are installed in the long holes C of the two connecting pieces to connect and fix the two connecting pieces, and each of the connecting pieces is provided with a camshaft hole and a ball socket sleeve at one end, and a camshaft is installed in the camshaft hole, and the end face from the camshaft to the connecting piece is provided with an external thread and an internal hole, and the bone needle clamp block is provided with a needle clamp seat B, and a ball head handle is fixedly connected to one end of the needle clamp seat B, and the ball head handle is fixedly connected to the needle clamp seat B after passing through the ball socket sleeve, and the ball socket sleeve is screwed onto the external thread on the end face of the connecting piece, and the ball head of the ball head handle is inserted into the inner hole on the end face of the connecting piece, and the ball socket sleeve cooperates with the camshaft to lock and fix the ball head and the connecting piece.

[0008] Furthermore, a first needle clamp and a second needle clamp are provided on the needle clamp seat B, the first needle clamp is configured as a fixed needle clamp, and the second needle clamp is configured as a rotating needle clamp.

[0009] Furthermore, the fixed needle clamp is provided with a needle clamp cover, the needle clamp seat B and the needle clamp cover are connected and locked by a locking bolt C, and a needle clamping groove B is provided between the needle clamp seat B and the needle clamp cover for clamping the bone needle.

[0010] Furthermore, the needle clamp seat B is provided with a sliding groove B, the sliding groove B is provided with a through long hole B downwardly, the lower end surface of the long hole B is provided with a long countersunk hole, a locking nut B is arranged in the long countersunk hole, the sliding groove B is provided with the sliding block, the upper surface of the sliding block is provided with a second ball socket, the sliding block under the second ball socket is provided with a through hole downwardly, the rotating needle clamp is arranged in the second ball socket, the locking bolt B passes through the second needle clamp, the sliding block and the needle clamp seat B, and is tightened with the locking nut B to lock and fix the rotating needle clamp and the bone needle clamped by it to the needle clamp seat B.

[0011] Furthermore, the pressure plate is configured as a spherical washer, and the upper surface of the upper clamping block is provided with a washer ball socket, which is arranged in cooperation with the spherical washer. In order to ensure that there is a certain angle rotation space between the rotating needle clamp and the locking bolt A and the locking bolt B respectively, the spherical washer is provided with a larger inner hole, and the locking bolt A and the locking bolt B are respectively provided with flat washers with a larger outer diameter between the spherical washer, and the lower clamping block and the upper clamping block are respectively provided with tapered holes passing through the upper and lower parts, the tapered hole of the lower clamping block has a large opening downward, and the tapered hole of the upper clamping block has a large opening upward.

[0012] Furthermore, the locking nut A and the locking nut B are both configured as external hexagonal, external square or flat nuts.

[0013] The directional description of up and down in this application is only for describing the placement of the drawings in the specification and is not specific.

[0014] Beneficial effects: The structural design of the utility model enables the relative distance between the first needle clamp and the second needle clamp to be adjusted, the direction of the bone needles clamped by the first needle clamp and the second needle clamp can be rotated in any direction at a certain angle, and the distance between the bone needles clamped by the first needle clamp and the second needle clamp and the bracket seat can be adjusted within a certain range. The purpose of using an orthopedic external fixator to adapt to the position and direction of surgical needle insertion is achieved, and the defect of surgical needle insertion to adapt to the orthopedic external fixator is overcome. This reduces the difficulty of the doctor's operation, reduces surgical defects such as loose fixation and bone nonunion caused by postoperative broken nails or absorption of the nail channel, and improves the surgical efficiency and cure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a first embodiment of a bone needle clamp.

[0016] Figure 2 for Figure 1 Diagram of the connection between the middle bone needle clamp and the bracket seat.

[0017] Figure 3 This is a structural diagram of a second embodiment of a bone needle clamp.

[0018] Figure 4 for Figure 3 Diagram of the connection relationship between the middle bone needle clamp and the connecting piece.

[0019] Figure 5 It is a schematic diagram of the structure of the ball and socket gasket.

[0020] Figure 6 It is a schematic diagram of the structure of the spherical upper clamp.

[0021] Explanation of the accompanying drawings: bracket seat 1, elongated hole B101, fixing bolt 2, needle clamp seat A3, first ball socket 301, sliding groove A302, elongated hole A303, pin hole 304, hemispherical lower clamp block 4, upper clamp block 5, washer ball socket 501, pressure plate 6, locking bolt A7, sliding block 8, second ball socket 801, locking nut A9, locking bolt B10, pressurizer 11, connecting piece 21, elongated hole C211, adjusting bolt 22, ball socket sleeve 23, camshaft 24, needle clamp seat B25, ball head handle 251, sliding groove B252, elongated hole B253, needle clamp cover 26, locking bolt C27, locking nut B28, ball socket washer 29, third ball socket 291, hemispherical upper clamp block 30. DETAILED DESCRIPTION

[0022] Figure 1-Figure 2 The utility model shows a first embodiment of a bone needle clamp block, wherein the bone needle clamp block is slidably arranged on a slide rail bracket seat 1 of an orthopedic external fixation bracket, and the bone needle clamp block and the bracket seat 1 are locked and fixed by a fixing bolt 2, and the bone needle clamp block is provided with a needle clamp seat A3, and a first needle clamp and a second needle clamp are provided on the needle clamp seat A3, and the first needle clamp and the second needle clamp are both configured as rotating needle clamps, and the rotating needle clamp is provided with a hemispherical lower clamp block 4, an upper clamp block 5 and a pressing plate 6, and the upper clamp block 5 is arranged on the lower clamp block 4, and the upper clamp block 5 and the lower clamp block 4 are connected. A needle clamping groove A is provided in the middle for clamping bone needles, the pressing plate 6 is arranged on the upper clamping block 5, and a first ball socket 301 is provided at one end of the upper surface of the needle clamp seat A3, and a screw hole A is provided on the needle clamp seat A3 below the first ball socket 301, and the hemispherical lower clamping block 4 of the first needle clamp is arranged in the first ball socket 301, and a locking bolt A7 is provided on the pressing plate 6 of the first needle clamp, and the locking bolt A7 passes through the pressing plate 6, the upper clamping block 5 and the lower clamping block 4 of the first needle clamp in sequence, and is tightened in the screw hole A of the needle clamp seat A3 to lock the first needle clamp and the bone needle clamped therein.

[0023] Furthermore, a sliding groove A302 is provided at the other end of the upper surface of the needle clamp seat A3, and a sliding block 8 is provided in the sliding groove A302. A second ball socket 801 is provided on the upper surface of the sliding block 8, and a through hole is provided in the sliding block 8 below the second ball socket 801. The hemispherical lower clamping block 4 of the second needle clamp is arranged in the second ball socket 801, and a long hole A303 is provided at the lower end of the long hole A303. A locking nut A9 is provided, and the bracket seat 1 is provided with a long hole B101. The locking nut A9 is slidably arranged in the long hole B101 of the bracket seat 1 and is prevented from rotating by the long hole B101. The locking bolt B10 passes through the pressure plate 6, the upper clamping block 5, the lower clamping block 4, the sliding block 8 and the needle clamp seat A3 of the second needle clamp in sequence, and cooperates with the locking nut A9 to lock and fix the second needle clamp and the bone needle clamped therein.

[0024] Furthermore, there are multiple bone needle clamps, and a pressurizer 11 is provided between two adjacent bone needle clamps. A pin hole 304 is provided at one end or both ends of the needle clamp seat A3. Pin shafts are provided at both ends of the pressurizer 11. The pressurizer is connected to two adjacent needle clamp seats A3 by plugging the pin shaft into the pin hole 304. The pressurizer itself adopts a structure in which a screw and a screw sleeve are matched and connected. The pressurizer 11 is extended and retracted through a spiral transmission method, thereby adjusting the distance between two adjacent bone needle clamps.

[0025] Figure 3-Figure 4 The specific structure of the second embodiment of a bone needle clamp of the utility model is shown. The bone needle clamp is rotatably arranged on a connecting piece 21 of an orthopedic external fixation bracket. The connecting piece 21 is provided with two, and a long hole C211 is arranged in the connecting piece 21. An adjusting bolt 22 is installed in the long holes C211 of the two connecting pieces 21 to connect and fix the two connecting pieces 21. A camshaft hole and a ball socket sleeve 23 are provided at one end of each connecting piece 21. A cam is installed in the camshaft hole. The shaft 24, the end face of the camshaft 24 to the connecting piece 21 is provided with an external thread and an inner hole, the bone needle clamp is provided with a needle clamp seat B25, one end of the needle clamp seat B25 is fixedly connected with a ball head handle 251, the ball head handle 251 passes through the ball socket sleeve 23 and is fixedly connected to the needle clamp seat B25, the ball socket sleeve 23 is threadedly connected to the connecting piece 21, the ball head of the ball head handle 251 is arranged in the inner hole, the ball socket sleeve 23 cooperates with the camshaft 24 to lock and fix the ball head to the connecting piece 21.

[0026] Furthermore, a first needle clamp and a second needle clamp are provided on the needle clamp seat B25, the first needle clamp is configured as a fixed needle clamp, and the second needle clamp is configured as the rotating needle clamp.

[0027] Furthermore, the fixed needle clamp is provided with a needle clamp cover 26, the needle clamp seat B25 and the needle clamp cover 26 are connected and locked by a locking bolt C27, and a needle clamping groove B is provided between the needle clamp seat B25 and the needle clamp cover 26 for clamping the bone needle.

[0028] Furthermore, the needle clamp seat B25 is provided with a sliding groove B252, the sliding groove B252 is provided with a through long hole B253 downwardly, the lower end surface of the long hole B253 is provided with a long countersunk hole, a locking nut B28 is arranged in the long countersunk hole, a sliding block 8 is arranged in the sliding groove B252, a second ball socket 801 is arranged on the upper surface of the sliding block 8, and a through hole is arranged downwardly on the sliding block 8 under the second ball socket 801, the rotating needle clamp is arranged in the second ball socket 801, and the locking bolt B10 passes through the rotating needle clamp, the sliding block 8 and the long hole B253 of the needle clamp seat B25 and is tightened with the locking nut B28.

[0029] Furthermore, the pressure plate 6 is configured as a spherical washer, and the upper surface of the upper clamp block 5 is provided with a washer ball socket 501, and the washer ball socket 501 is arranged in cooperation with the spherical washer. In order to ensure that there is a certain angle rotation space between the rotating needle clamp and the locking bolt A7 and the locking bolt B10 respectively, the spherical washer is provided with a larger inner hole, and a flat washer with a larger outer diameter is provided between the locking bolt A7 and the locking bolt B10 and the spherical washer respectively. The lower clamp block 4 and the upper clamp block 5 are respectively provided with tapered holes passing through the upper and lower parts, and the tapered hole of the lower clamp block 4 has a large opening downward, and the tapered hole of the upper clamp block 5 has a large opening upward.

[0030] Figure 5-Figure 6 The specific structure of the third embodiment of a bone needle clamp of the utility model is shown. The third embodiment is different from the first and second embodiments only in that the pressure plate 6 is configured as a ball and socket washer 29, the lower surface of the ball and socket washer 29 is provided with a third ball socket 291, and the upper clamp block 5 is configured as a hemispherical upper clamp block 30, the hemispherical upper clamp block 30 is provided with a large upward tapered hole, and the hemispherical upper clamp block 30 is arranged in coordination with the third ball socket 291.

Claims

1. A bone needle clamp block, comprising a needle clamp seat A (3), wherein a needle clamp is arranged on the needle clamp seat A (3), characterized in that: The needle clamp is configured as a rotating needle clamp, and the rotating needle clamp is provided with a hemispherical lower clamp block (4), an upper clamp block (5) and a pressure plate (6), wherein the upper clamp block (5) is arranged on the lower clamp block (4), and the pressure plate (6) is arranged on the upper clamp block (5), the surface of the needle clamp seat A (3) is provided with a first ball socket (301), the hemispherical lower clamp block (4) is arranged in the first ball socket (301), the pressure plate (6) is configured as a spherical washer, and the upper surface of the upper clamp block (5) is provided with a washer ball socket (501), the lower clamp block (4) and the upper clamp block (5) are respectively provided with tapered holes passing through the upper and lower parts, the tapered hole of the lower clamp block (4) is facing downward, and the tapered hole of the upper clamp block (5) is facing upward, and the rotating needle clamp is locked and fixed to the needle clamp seat A (3) by a locking bolt A (7).

2. A bone needle clamp according to claim 1, characterized in that: The upper surface of the needle clamp seat A (3) is provided with a sliding groove A (302), a sliding block (8) is provided in the sliding groove A (302), a second ball socket (801) is provided on the upper surface of the sliding block (8), a through hole is provided on the sliding block (8) below the second ball socket (801), the rotating needle clamp is provided in the second ball socket (801), a long hole A (303) is provided on the needle clamp seat A (3) below the sliding groove A (302), a locking nut A (9) is provided at the lower end of the long hole A (303), and the rotating needle clamp is locked and fixed to the needle clamp seat A (3) by the locking bolt B (10) and the locking nut A (9).

3. A bone needle clamp according to claim 1 or 2, characterized in that: The pressure plate (6) is configured as a ball socket washer (29), a third ball socket (291) is provided on the lower surface of the ball socket washer (29), and the upper clamping block (5) is configured as a hemispherical upper clamping block (30), the hemispherical upper clamping block (30) being provided with a tapered hole with a large opening facing upward.

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