Single-rod type bone setting external fixing support

Abstract

Aiming at the problems in the prior art, the utility model provides a single-rod type bone setting external fixation support which is characterized by comprising an elbow end block, an end block, at least one middle block, a rod, at least one one-way bone nail, at least one universal bone nail, a supporting rod, a supporting block, at least two joint blocks and at least two locking plate screws, the fixing device composed of the supporting block, the supporting rod and the connector block can enhance the strength of the rod between the elbow end block and the supporting block, and the sections with the strength needing to be increased can be adjusted according to actual conditions so as to be suitable for being fixed to clinical fractures under different conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of bone correction devices, and in particular relates to a single-rod type bone-setting external fixation bracket. Background Art

[0002] As a new type of external fixator, the advantages of the rod-block combination external fixator in the treatment of limb fractures have been clinically confirmed.

[0003] Existing rod-block combination external fixators usually include: connecting rods, fixing blocks and hanging blocks. Among them, a rod-block combination external fixator composed of only one connecting rod can be used to fix most clinical fractures. However, since its strength is weaker than that of a rod-block combination external fixator composed of more than two connecting rods, it has certain limitations in clinical application. Utility Model Content

[0004] The utility model aims at the problems existing in the prior art and provides a single-rod bone fixation external fixator, characterized in that it comprises: an elbow end block, an end block, at least one intermediate block, a rod, at least one unidirectional bone screw, at least one universal bone screw, a support rod, a support block, at least two joint blocks and at least two locking disk screws, the elbow end block is provided with a locking disk, at least one bone screw hole, at least one rod block locking structure and a blind hole, the end block is provided with at least one bone screw hole, at least one rod block locking structure and a blind hole, the intermediate block is provided with at least one bone screw hole, at least one rod block locking structure and a through hole, the support block is provided with a locking disk, a through hole and a rod block locking structure, the joint block is provided with a cover locking disk, a blind hole and a rod block locking structure, the locking disk is provided with a first disk tooth and a locking disk screw hole, the cover locking disk is provided with a second disk tooth and a locking disk ball socket, and the locking disk screw is provided with a locking disk thread and a spherical nail head with a diameter similar to the locking disk ball socket;

[0005] The shape and size of the blind hole are consistent with the rod and do not penetrate the elbow end block or the end block. The elbow end block and the end block are fixed at both ends of the rod through the blind hole and the rod block locking structure;

[0006] The through hole has the same shape and size as the rod and passes through the middle block, and the middle block is fixed to the middle of the rod through the through hole and the rod-block locking structure;

[0007] The one-way bone screw is provided with a first bone screw thread and a screw rod;

[0008] The universal bone nail is divided into a cap and a ball nail, the cap is provided with a second bone nail thread, one end of the ball nail is spherical and the other end is consistent in shape and size with the nail rod, and the part of the bottom of the cap that contacts the ball nail is a ball socket consistent with the spherical diameter of the ball nail;

[0009] The bone screw hole is provided with a screw thread, a hole socket and a through hole, the hole socket is hemispherical, the bottom diameter of the screw thread is larger than the diameter of the hole socket, the diameter of the through hole is smaller than the diameter of the hole socket but larger than the diameter of the screw rod, and the screw thread matches the first bone screw thread and the second bone screw thread;

[0010] One end of the one-way bone screw passes through the through hole to be fixed to the bone, and the first bone screw thread at the other end matches the screw hole thread to form a threaded connection, and the bottom diameter of the screw hole thread is larger than the through hole so that the other end of the one-way bone screw remains in the bone screw hole;

[0011] One end of the ball nail passes through the through hole and is fixed to the bone. The diameter of the hole socket is consistent with the ball shape of the ball nail so that the ball shape of the ball nail is retained in the bone nail hole. The cap matches the screw thread of the nail hole to form a threaded connection. The ball socket of the cap presses the ball shape of the ball nail so that the ball nail is fixed in the bone nail hole.

[0012] The support rod is placed in the blind hole, and the rod block locking structure is used to form a fixed connection between the support rod and the joint block. The lock disk thread of the lock disk screw passes through the lock disk ball socket and forms a threaded connection with the lock disk screw hole. The spherical nail head presses the lock disk ball socket, thereby generating pressure between the second disk tooth and the first disk tooth to prevent the lock disk and the cover lock disk from rotating relative to each other, so that the support block, the support rod and the joint block are fixedly connected, thereby enhancing the strength of the rod between the elbow end block and the support block.

[0013] Furthermore, the sides of the elbow end block, end block and joint block are provided with locking screw holes connected to the blind holes, the threads of the locking screw holes match the threads of the locking screws, both ends of the rod are provided with plum blossom grooves parallel to the axis of the rod, and both ends of the support rod are provided with plum blossom grooves parallel to the axis of the support rod, and the locking screws press the plum blossom grooves through the locking screw holes to prevent the rod and the support rod from rotating along the axis.

[0014] Furthermore, the bone screw hole is provided with an opening, and a one-way bone screw or a ball-head nail that has been pre-fixed in the bone can be placed in the bone screw hole through the opening.

[0015] The utility model has at least one of the following advantages:

[0016] The fixing device composed of a support block, a support rod and a joint block can enhance the strength of the rod between the elbow end block and the support block. The circular disc design of the locking plate and the cover locking plate and the support rods of different lengths can form different angles between the support rods. The distance between the elbow end block and the support block can be adjusted, that is, the segment that needs to increase the strength can be adjusted, so as to be suitable for fixation of clinical fractures in different situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows a schematic structural diagram of a single-rod bone fixation external fixator of the utility model;

[0018] Figure 2 The figure shows the schematic diagram of the elbow end block structure of the utility model;

[0019] Figure 3 Shown is a schematic diagram of the end block structure of the utility model;

[0020] Figure 4 Shown is a schematic structural diagram of the intermediate block of the utility model;

[0021] Figure 5 The figure shows a schematic diagram of the structure of the support block of the utility model;

[0022] Figure 6 Shown is a schematic diagram of the structure of the connector block of the utility model;

[0023] Figure 7 Shown is a structural schematic diagram of the other side of the connector block of the utility model;

[0024] Figure 8 The figure shows the structure diagram of the locking disk screw of the utility model;

[0025] Fig. 9 The figure shows the structure schematic diagram of the one-way bone nail of the utility model;

[0026] Fig.10 The figure is a schematic diagram of the structure of the universal bone nail of the utility model;

[0027] Fig.11 Shown is a cross-sectional schematic diagram of the bone nail hole of the utility model;

[0028] Fig.12 The figure shows the structure diagram of the locking screw of the utility model;

[0029] Fig.13 Shown is a schematic diagram of the structure of the rod of the utility model;

[0030] Fig.14 The figure shows a schematic diagram of the structure of the support rod of the utility model;

[0031] In the figure: 1 elbow end block, 2 end block, 3 middle block, 4 rod, 5 support block, 6 joint block, 601 cover lock disk, 602 lock disk ball socket, 603 second disk tooth, 7 one-way bone screw, 701 first bone screw thread, 702 nail rod, 8 universal bone screw, 801 cover cap, 802 ball head nail, 803 second bone screw thread, 9 locking screw, 10 lock disk screw, 1001 spherical nail head, 1002 lock disk thread, 11 blind hole, 12 rod block locking structure, 13 lock disk, 1301 first disk tooth, 1302 lock disk screw hole, 14 locking screw hole, 15 bone screw hole, 1501 nail hole thread, 1502 hole socket, 1503 through hole, 1504 opening, 16 through hole, 17 support rod, 18 plum blossom socket. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] Example 1

[0034] like Figure 1 As shown, firstly, the rod 4 is placed in the blind hole 11 of the elbow end block, and the elbow end block 1 is fixed to one end of the rod 4 by the rod block locking structure 12. Then, the support block 5 and the plurality of intermediate blocks 3 are passed through the through hole 16 on the rod 4 and moved to a suitable position, and then the support block 5 and the plurality of intermediate blocks 3 are fixed to the rod 4 by the rod block locking structure 12. Then, the end block 2 is placed at the other end of the rod 4 through the blind hole 11 and fixed to the rod 4 by the rod block locking structure 12. At least two ball studs 802 are used to pass one end of the screw through the through hole 1503 and fix it to the bone. After adjusting to a suitable position, the cap 801 is matched with the nail hole thread 1501 to form a threaded connection and fixed. The fixed ball head nail 802 preliminarily fixes a single-rod type bone fixation external fixator on the bone, and the one-way bone screw is passed through the through hole 1503 of the remaining bone screw hole 15 to be fixed to the bone, and the two joint blocks 6 are placed at both ends of the support rod 17 through the blind hole 11 and the joint block 6 is fixed to the support rod 17 using the rod block locking structure 12. The locking disk thread of the locking disk screw passes through the locking disk ball socket and forms a threaded connection with the locking disk screw hole. The spherical nail head presses the locking disk ball socket, thereby generating pressure between the second disk teeth and the first disk teeth to prevent the locking disk and the cover locking disk from rotating relative to each other, so that the support block, the support rod and the joint block are fixedly connected, thereby enhancing the strength of the rod between the elbow end block and the support block.

[0035] Example 2

[0036] like Figure 1 , Fig.13 , Fig.14 As shown, on the basis of embodiment 1, a locking screw 9 is used to press the hexalobular groove 18 through the locking screw hole 14 to prevent the rod 4 and the supporting rod 17 from rotating along the axis.

[0037] Example 3

[0038] like Figure 1 , Figure 4 As shown, based on Example 1, the one-way bone screw 7 or ball-head screw 802 pre-fixed in the bone can be placed in the bone screw hole 15 through the opening 1504 instead of passing through the through hole 1503.

[0039] It should be noted and understood that various modifications and improvements can be made to the utility model described in detail above without departing from the spirit and scope of the claims of the utility model. Therefore, the scope of the technical solution claimed is not limited by any specific exemplary teaching given.

Claims

1. A single-rod bone fixation external fixator, characterized in that: include: An elbow end block (1), an end block (2), at least one intermediate block (3), a rod (4), at least one unidirectional bone screw (7), at least one universal bone screw (8), a support rod (17), a support block (5), at least two joint blocks (6) and at least two locking disk screws (10), wherein the elbow end block (1) is provided with a locking disk (13), at least one bone screw hole (15), at least one rod block locking structure (12) and a blind hole (11), the end block (2) is provided with at least one bone screw hole (15), at least one rod block locking structure (12) and a blind hole (11), the intermediate block (3) is provided with at least one bone screw The invention relates to a nail hole (15), at least one rod block locking structure (12) and a through hole (16); the support block (5) is provided with a locking disk (13), a through hole (16) and a rod block locking structure (12); the joint block (6) is provided with a cover locking disk (601), a blind hole (11) and a rod block locking structure (12); the locking disk (13) is provided with a first disk tooth (1301) and a locking disk screw hole (1302); the cover locking disk (601) is provided with a second disk tooth (603) and a locking disk ball socket (602); the locking disk screw (10) is provided with a locking disk thread (1002) and a spherical nail head (1001) having a diameter similar to that of the locking disk ball socket (602); The shape and size of the blind hole (11) are consistent with those of the rod (4) and do not penetrate the elbow end block (1) or the end block (2); the elbow end block (1) and the end block (2) are fixed at both ends of the rod (4) through the blind hole (11) and the rod block locking structure (12); The through hole (16) has the same shape and size as the rod (4) and passes through the middle block (3); the middle block (3) is fixed to the middle part of the rod (4) through the through hole (16) and the rod-block locking structure (12); the one-way bone screw (7) is provided with a first bone screw thread (701) and a screw rod (702); The universal bone nail (8) is divided into a cap (801) and a ball nail (802), the cap (801) is provided with a second bone nail thread (803), one end of the ball nail (802) is spherical and the other end is consistent in shape and size with the nail rod (702), and the bottom of the cap (801) The part that contacts the ball nail (802) is a ball socket that is consistent with the spherical diameter of the ball nail (802); The bone screw hole (15) is provided with a screw thread (1501), a hole socket (1502) and a through hole (1503); the hole socket (1502) is hemispherical; the bottom diameter of the screw thread (1501) is larger than the diameter of the hole socket (1502); the diameter of the through hole (1503) is smaller than the diameter of the hole socket (1502) but larger than the diameter of the screw rod (702); the screw thread (1501) matches the first bone screw thread (701) and the second bone screw thread (803); One end of the one-way bone screw (7) passes through the through hole (1503) to be fixed to the bone, and the first bone screw thread (701) at the other end matches with the screw hole thread (1501) to form a threaded connection, and the bottom diameter of the screw hole thread (1501) is larger than the through hole so that the other end of the one-way bone screw (7) remains in the bone screw hole (15); One end of the ball nail (802) passes through the through hole (1503) to be fixed to the bone. The diameter of the hole (1502) is consistent with the spherical shape of the ball nail (802), so that the ball nail (802) is spherically retained in the bone nail hole (15). The cap (801) matches the nail hole thread (1501) to form a threaded connection. The ball socket of the cap (801) presses the ball nail (802) spherically to fix the ball nail (802) in the bone nail hole (15); the support rod (17) is placed in the blind hole (11) and the support rod (17) and the joint block (6) are locked through the rod block locking structure (12). ) forms a fixed connection, the lock plate thread (1002) of the lock plate screw (10) passes through the lock plate ball socket (602) and forms a threaded connection with the lock plate screw hole (1302), the spherical nail head (1001) presses the lock plate ball socket (602) so as to generate pressure between the second plate teeth (603) and the first plate teeth (1301) to prevent the lock plate (13) and the cover lock plate (601) from rotating relative to each other, so that the support block (5), the support rod (17) and the joint block (6) form a fixed connection, thereby enhancing the strength of the rod (4) between the elbow end block (1) and the support block (5).

2. A single-rod bone fixation external fixator according to claim 1, characterized in that: The elbow end block (1), the end block (2) and the joint block (6) are provided with locking screw holes (14) on their sides which are connected to the blind hole (11); the threads of the locking screw holes (14) match the threads of the locking screws (9); both ends of the rod (4) are provided with hexalobular grooves (18) which are parallel to the axial direction of the rod (4); both ends of the support rod (17) are provided with hexalobular grooves (18) which are parallel to the axial direction of the support rod (17); the locking screws (9) press the hexalobular grooves (18) through the locking screw holes (14) to prevent the rod (4) and the support rod (17) from rotating along the axis.

3. A single-rod bone fixation external fixator according to claim 1, characterized in that: The bone screw hole (15) is provided with an opening (1504), and the one-way bone screw (7) or ball-head nail (802) that has been pre-fixed in the bone can be placed in the bone screw hole (15) through the opening (1504).

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