Connector for bone defect

Abstract

The utility model discloses a connector for bone defect, which relates to the technical field of bone repair and comprises a bionic bone, two connecting blocks are fixed on the outer sides of the head end and the tail end of the bionic bone, first through holes are formed in the inner sides of the connecting blocks, second through holes are formed in the outer sides of the connecting blocks, and the first through holes and the second through holes are positioned on the same axis. And the first through hole is communicated with the second through hole. The first through hole is aligned with a hole drilled in a human skeleton in advance, then the sleeve is inserted into the hole along the first through hole, in order to prevent the sleeve from rotating in the using process, the limiting rod arranged on the connecting block can be inserted into the first clamping groove in the bearing ring connected to the outer end of the sleeve, locking of the sleeve in the direction is formed, and finally, the sleeve is inserted into the first clamping groove in the bearing ring. The nail body assembly is inserted into the sleeve, so that the nail body assembly expands the inner end of the sleeve, the opening of the reserved groove is forced to be expanded, the protruding block can be embedded into the human skeleton, and the sleeve is fixed in the human skeleton.

Description

TECHNICAL FIELD

[0001] The utility model relates to bone repair technical field, especially in a kind of connector for bone defect. BACKGROUND

[0002] Bone defect caused by trauma or operation is called bone defect. Due to the existence of bone defect, it often causes non-union, delayed healing or non-healing, and local dysfunction. When the patient has bone defect, the support and other connectors need to be used in time to replace the position of bone defect to form support and achieve the purpose of treating the patient.

[0003] The connector for bone defect will loosen or fall off during long-term use due to the influence of factors such as the movement of the patient's body or the shaking of the patient driven by the external environment. In this way, the connector is difficult to continue to be stably connected at the bone defect position, and the offset connector is easy to cause secondary injury to the human body, which seriously affects the health of the patient. UTILITY MODEL CONTENT

[0004] The purpose of the present application is to provide a connector for bone defect to solve the problem that the connector for bone defect will loosen or fall off during long-term use due to the influence of factors such as the movement of the patient's body or the shaking of the patient driven by the external environment. In this way, the connector is difficult to continue to be stably connected at the bone defect position, and the offset connector is easy to cause secondary injury to the human body, which seriously affects the health of the patient.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a connector for bone defect, comprising a bionic skeleton, two connecting blocks are fixed on the outer side of the head and tail end of the bionic skeleton, a first through hole is formed in the inner side of the connecting block, a second through hole is formed in the outer side of the connecting block, the first through hole and the second through hole are located on the same axis, and the first through hole and the second through hole are in communication with each other, two limiting rods are fixed in the second through hole, a sleeve is slidingly inserted into the first through hole, a load ring is fixed and communicated with the outer end of the sleeve, a first clamping groove matched with the limiting rod is formed on the load ring, two symmetrically arranged reservation grooves are formed on the sleeve, a plurality of protrusions are fixed on the outer wall of the sleeve, a nail body assembly is inserted into the inside of the sleeve, and the nail body assembly is used for expanding the inside end of the sleeve and fixing the connecting block and the human bone.

[0006] Further, the inner diameter of the second through hole is 1.5 times the inner diameter of the first through hole.

[0007] Further, the wall thickness of the sleeve is equal, and the diameter of the inner end of the sleeve is smaller than the diameter of the outer end of the sleeve.

[0008] Further, the nail body assembly comprises a stud which is screwed with the sleeve, an outer end of the stud is fixed with a connecting rod, an outer end of the connecting rod is fixed with an end plate, and a screw groove is formed on the outer side of the end plate.

[0009] Further, an inner end of the stud is fixed with a guide block.

[0010] Further, a recess is formed in the inner part of the carrier ring, a spring is fixed in the recess, another end of the spring is fixed with a clamping cylinder which is in sliding fit with the inner wall of the recess, and a second clamping groove which is matched with the clamping cylinder is formed on the connecting rod.

[0011] In conclusion, the technical effects and advantages of the utility model are as follows:

[0012] In the utility model, the first through hole is aligned with the hole drilled in advance on the human skeleton, then the sleeve is inserted into the hole along the first through hole, in order to prevent the sleeve from rotating during use, the limiting rod arranged on the connecting block is inserted into the first clamping groove in the carrier ring connected to the outer end of the sleeve, thereby locking the sleeve in the direction, finally, the nail body assembly is inserted into the sleeve, so that the nail body assembly pries open the inner end of the sleeve, forces the opening of the reserved groove to expand, and enables the protruding block to be embedded in the human skeleton, thereby achieving the fixation of the sleeve in the human skeleton, and the sleeve cooperating with the carrier ring can complete the preliminary fixation of the connecting block and the human skeleton, and the nail body assembly can help to further fix the connecting block and the human skeleton, so that the connection between the connecting block and the human skeleton is more firm.

[0013] In the utility model, when the nail body assembly pries open the inner end of the sleeve, the protruding block on the sleeve is embedded in the human skeleton, thereby forming a stable connection and preventing the sleeve from separating from the human skeleton, at this time, the sleeve exerts a pressing force on the nail body assembly, so that the connection between the nail body assembly and the sleeve is more stable, during the process of continuously rotating the nail body assembly into the sleeve, the nail body assembly exerts a pressing force on the clamping cylinder to shrink in the recess, until the end plate in the nail body assembly enters the inner part of the second through hole and touches the carrier ring, the clamping cylinder is inserted into the second clamping groove by the elastic force of the spring, thereby forming a locking structure and preventing the nail body assembly from separating from the carrier ring, and further ensuring that the connector will not be loose and fall off after being connected with the human skeleton. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior description will be briefly introduced.

[0015] Figure 1 Fig. 1 is a connection relationship diagram of the connector for bone defect and human skeleton in the embodiment of the present application;

[0016] Figure 2 Fig. 2 is a perspective structural schematic view of the connector for bone defect in the embodiment of the present application;

[0017] Figure 3 The connection relationship diagram of the connecting block and the limiting rod in the embodiment of the application is shown in the figure.

[0018] Figure 4 The connection relationship diagram of the carrier ring, the sleeve, and the protruding block in the embodiment of the application is shown in the figure.

[0019] Figure 5 The internal structure diagram of the carrier ring and the sleeve in the embodiment of the application is shown in the figure.

[0020] Figure 6 The three-dimensional structure diagram of the nail body assembly in the embodiment of the application is shown in the figure.

[0021] In the figure: 1, bionic skeleton; 2, connecting block; 3, first through hole; 4, second through hole; 5, limiting rod; 6, carrier ring; 7, first clamping groove; 8, sleeve; 9, reserved groove; 10, protruding block; 11, stud; 12, connecting rod; 13, end plate; 14, screw groove; 15, groove; 16, spring; 17, clamping cylinder; 18, second clamping groove. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application.

[0023] Embodiment: Referring to Figures 1-6 The connector for bone defect shown in the figure comprises a bionic skeleton 1, two connecting blocks 2 are fixed to the outer sides of the head and tail ends of the bionic skeleton 1, a first through hole 3 is formed in the inner side of the connecting block 2, a second through hole 4 is formed in the outer side of the connecting block 2, the first through hole 3 and the second through hole 4 are located on the same axis, and the first through hole 3 and the second through hole 4 are in communication with each other, two limiting rods 5 are fixed in the interior of the second through hole 4, the inner diameter of the second through hole 4 is 1.5 times the inner diameter of the first through hole 3, so as to leave a position for the limiting rod 5, a sleeve 8 is slidingly inserted into the first through hole 3, a carrier ring 6 is fixed and communicated to the outer end of the sleeve 8, the carrier ring 6 is in clearance fit with the inner wall of the second through hole 4, a first clamping groove 7 adapted to the limiting rod 5 is formed in the carrier ring 6, two symmetrically arranged reserved grooves 9 are formed in the sleeve 8, a plurality of protruding blocks 10 are fixed to the outer wall of the sleeve 8, a nail body assembly is inserted into the interior of the sleeve 8, the wall thickness of the sleeve 8 is equal everywhere, and the diameter of the inner end of the sleeve 8 is smaller than the diameter of the outer end of the sleeve 8, so that the nail body assembly can expand the inner end of the sleeve 8, and the nail body assembly is used for expanding the inner end of the sleeve 8 and fixing the connecting block 2 and the human bone.

[0024] The first through hole 3 is aligned with the hole drilled in advance on the human bone, then the sleeve 8 is inserted into the hole along the first through hole 3, in order to prevent the sleeve 8 from rotating during use, the limiting rod 5 arranged on the connecting block 2 is inserted into the inside of the first clamping groove 7 on the connecting ring 6 connected to the outer end of the sleeve 8, forming the locking of the direction of the sleeve 8, finally, the nail body assembly is inserted into the sleeve 8, so that the nail body assembly supports the inner end of the sleeve 8, forces the reserved slot 9 to expand the opening, so that the protruding block 10 can be embedded in the human bone, realizing the fixation of the sleeve 8 in the human bone, and the sleeve 8 cooperates with the connecting ring 6 to complete the preliminary fixation of the connecting block 2 and the human bone, and the nail body assembly can help the connecting block 2 and the human bone to be further fixed.

[0025] The nail body assembly comprises a threaded stud 11, the threaded stud 11 is in threaded connection with the sleeve 8, the inner end of the threaded stud 11 is fixedly connected with a guide block, the threaded stud 11 is convenient for being inserted into the sleeve 8, the outer end of the threaded stud 11 is fixedly connected with a connecting rod 12, the outer end of the connecting rod 12 is fixedly connected with an end plate 13, the end plate 13 is in clearance fit with the inner wall of the second through hole 4, a screw groove 14 is formed in the outer side of the end plate 13, a recess 15 is formed in the inside of the connecting ring 6, a spring 16 is fixedly connected in the inside of the recess 15, a clamping barrel 17 is fixedly connected to the other end of the spring 16, the clamping barrel 17 is in sliding fit with the inner wall of the recess 15, and a second clamping groove 18 matched with the clamping barrel 17 is formed in the connecting rod 12.

[0026] When the inner end of the sleeve 8 is supported by the threaded stud 11, the protruding block 10 on the sleeve 8 is embedded in the human bone, forming a stable connection and preventing the sleeve 8 from being separated from the human bone, at this time, the sleeve 8 exerts pressure on the threaded stud 11, so that the threaded stud 11 is more stable in connection with the sleeve 8, in the process of continuously rotating the nail body assembly into the sleeve 8, the nail body assembly exerts pressure on the clamping barrel 17 to make the clamping barrel 17 shrink in the recess 15, until the end plate 13 in the nail body assembly enters the inside of the second through hole 4 and touches the connecting ring 6, the clamping barrel 17 can be inserted into the second clamping groove 18 by the elastic force of the spring 16, forming a locking structure and preventing the nail body assembly from being separated from the connecting ring 6.

[0027] The material of the bionic bone 1 is a reliable material for orthopedic implants, for example, a zinc alloy can be used.

[0028] The working principle of the utility model:

[0029] The bionic bone 1 is designed and manufactured according to the bone defect morphology of the patient, the bionic bone 1 and the connecting block 2 are integrally cast into a shape, in the surgical process, the patient's bone can be cut as necessary, so that the edge is matched with the end of the bionic bone 1, a hole corresponding to the first through hole 3 is drilled on the patient's bone, then the bionic bone 1 is placed at the patient's bone defect, and the first through hole 3 is communicated with the hole drilled in advance.

[0030] Take out the sleeve 8, insert it into the hole along the first through hole 3 inside, until the carrier ring 6 enters the inside of the second through hole 4, and the limiting rod 5 is inserted into the first clamping groove 7 opened on the carrier ring 6, preventing the carrier ring 6 and the sleeve 8 from rotating in subsequent use, take out the pin body assembly, screw it into the sleeve 8, as the stud 11 continuously enters the inside of the sleeve 8, it will extrude the inner end of the sleeve 8, forcing the reserved slot 9 to expand, so that the inner end of the sleeve 8 expands outward and deforms, in this way, the protrusion 10 on the sleeve 8 will be embedded inside the patient's bone, so that the sleeve 8 is very firmly fixed with the patient's bone, as the pin body assembly continuously penetrates, the end plate 13 will enter the inside of the second through hole 4 and tightly adhere to the carrier ring 6, the clamping barrel 17 on the carrier ring 6 will be pushed into the second clamping groove 18 under the elastic pushing of the spring 16, so that the pin body assembly is locked with the carrier ring 6, in this way, the sleeve 8 and the pin body assembly are difficult to loosen or fall off during use, ensuring the stability and safety of the bionic bone 1 during use.

[0031] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for the skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A connector for bone defects, comprising a biomimetic bone (1), characterized in that: The bionic skeleton (1) is fixed with two connecting blocks (2) on the outside of the head and tail ends, the inner side of the connecting block (2) is provided with a first through hole (3), the outer side of the connecting block (2) is provided with a second through hole (4), the first through hole (3) and the second through hole (4) are located on the same axis, and the first through hole (3) and the second through hole (4) are communicated with each other, the second through hole (4) is fixed with two limiting rods (5) inside, the first through hole (3) is slidably connected with a sleeve (8), the outer end of the sleeve (8) is fixedly connected with a carrier ring (6), the carrier ring (6) is provided with a first clamping groove (7) matched with the limiting rod (5), the sleeve (8) is provided with two symmetrically arranged reserved grooves (9), the outer wall of the sleeve (8) is fixed with a plurality of protrusions (10), the sleeve (8) is inserted with a nail body assembly, and the nail body assembly is used for expanding the inner end of the sleeve (8) and fixing the connecting block (2) and the human skeleton.

2. The connector for bone defects according to claim 1, characterized in that: The inner diameter of the second through hole (4) is 1.5 times the inner diameter of the first through hole (3).

3. The connector for bone defects according to claim 1, wherein: The wall thickness of the sleeve (8) is equal, and the diameter of the inner end of the sleeve (8) is smaller than the diameter of the outer end of the sleeve (8).

4. The connector for bone defects according to claim 1, wherein: The nail body assembly comprises a threaded stud (11), the threaded stud (11) is threadedly connected with the sleeve (8), the outer end of the threaded stud (11) is fixed with a connecting rod (12), the outer end of the connecting rod (12) is fixed with an end plate (13), and the outer side of the end plate (13) is provided with a screw groove (14).

5. The connector for bone defects according to claim 4, characterized in that: The inner end of the threaded stud (11) is fixed with a guide block.

6. The connector for bone defects according to claim 4, characterized in that: The inner side of the carrier ring (6) is provided with a groove (15), the inner side of the groove (15) is fixed with a spring (16), the other end of the spring (16) is fixed with a clamping cylinder (17), the clamping cylinder (17) is slidably connected with the inner wall of the groove (15), and the connecting rod (12) is provided with a second clamping groove (18) matched with the clamping cylinder (17).

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