Rat femoral ankle defect fixing support

Abstract

The utility model discloses a rat femoral ankle defect fixing support, which relates to the technical field of fixing supports and comprises a first fixing frame and a second fixing frame, the second fixing frame is arranged at one end of the first fixing frame, and an adjusting mechanism capable of adjusting the length of the fixing support according to the length of a femur is arranged in the first fixing frame. By means of the adjusting mechanism, when the length of the fixing support needs to be adjusted according to the length of the thighbone, the second fixing frame is pulled, the connecting block slides in the connecting groove, the clamping pin and the spring can be extruded by the interior of the first fixing frame, and when the position of the connecting block is proper, the spring resets to push the clamping pin to enter the clamping groove; the second fixing frame is connected with the first fixing frame through the connecting block, the spring is reset to push the clamping pin to enter different clamping grooves, the distance between the first fixing frame and the second fixing frame can be adjusted, and therefore the fixing frame can be suitable for femur with different lengths.

Description

TECHNICAL FIELD

[0001] The utility model relates to fixed support technical field, concretely is a rat femur ankle defect fixed support. BACKGROUND

[0002] Rat is the animal model that human being widely uses, and its cost is low, and the model variety of the transgenic test strain that has established is numerous, can observe the mechanism of action of various genes in the osteogenesis process very well. However, the animal model currently applied to osteogenesis research adopts ectopic osteogenesis mode, that is, osteogenesis research is carried out in subcutaneous non-bone tissue environment, which cannot simulate the osteogenesis microenvironment well. Rat bone tissue is too small, and it is difficult to carry out in situ osteogenesis transplantation experiment, the length of adult rat femur is about 2cm or less, and there is currently a lack of such small size internal fixation instrument on the market, and the existing internal fixation instrument can only fix one screw at each end of the bone defect in the length range of rat femur, which can easily produce angular displacement in the daily activities of rats after operation, affecting the experimental results, and there is still a lack of good fixation instrument and method for rat femur in situ osteogenesis animal model, such as the internal fixation support for rat femur defect in the patent document with the patent announcement number CN212369123U3, which is designed in an arc shape, and can better fit the surface of rat femur when fixing the support body and femur, providing convenience for subsequent screw fixation, and has the advantages of good stability, no angular displacement after fixation and the like, but the fixed support cannot adjust the length, and cannot be adjusted according to the length of the rat femur during use, so that it is suitable for rat femurs of different lengths.

[0003] Based on this, a rat femur ankle defect fixed support is provided, which can eliminate the disadvantages of the existing device. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a rat femur ankle defect fixed support to solve the problem that the fixed support in the background art cannot adjust the length and cannot be applied to rat femurs of different lengths.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A rat femur ankle defect fixed support, comprising a first fixed support and a second fixed support, one end of the first fixed support is provided with the second fixed support, and the inside of the first fixed support is provided with an adjusting mechanism that can adjust the length of the fixed support according to the length of the femur.

[0007] On the basis of the above technical scheme, the utility model also provides the following optional technical scheme:

[0008] In an optional scheme, the adjusting mechanism comprises a connecting groove, a clamping groove, a connecting block, a spring groove, a spring and a clamping pin, one end of the first fixing frame is internally provided with the connecting groove, one side of the connecting groove is provided with a plurality of clamping grooves, the inner wall of the connecting groove is slidably connected with the connecting block, one end of the connecting block is fixedly connected with the second fixing frame, one end of the connecting block is provided with the spring groove, the spring groove is internally provided with the spring, one end of the spring is fixedly connected with the spring groove, and the other end is fixedly connected with the clamping pin, and the outer wall of the clamping pin is matched with the clamping groove.

[0009] In an optional scheme, the size of the inner wall of the connecting groove is consistent with the size of the outer wall of the connecting block.

[0010] In an optional scheme, the diameter size of the spring groove is consistent with the diameter size of the spring.

[0011] In an optional scheme, the surface of the first fixing frame, the second fixing frame and the connecting block is provided with a plurality of threaded holes, and the inner wall of the threaded hole is threadedly connected with a screw.

[0012] In an optional scheme, the two sides of the first fixing frame and the second fixing frame are provided with a plurality of grooves.

[0013] In an optional scheme, the thickness of the left side of the first fixing frame and the second fixing frame is greater than that of the right side, and the left end face and the right end face of the first fixing frame and the second fixing frame are transitioned through the arc-shaped face of the inner recess.

[0014] In an optional scheme, the surface of the first fixing frame and the second fixing frame is coated with a layer of hydroxyapatite material.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] The utility model discloses a adjusting mechanism, when need according to the length of femur length adjustment fixed support, pull the second fixed frame, make the connecting block slide in the connecting groove, the inside of first fixed frame will extrude the clamping pin and spring, when the connecting block position is appropriate, the spring resets and pushes the clamping pin to enter the inside of clamping groove, makes the second fixed frame through the connecting block and first fixed frame and is connected together, resets the spring and pushes the clamping pin to enter the inside of different clamping groove, the distance between first fixed frame and second fixed frame can be adjusted, so that the fixed frame can be suitable for different length femur. ACCURACY OF DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of the utility model.

[0018] Figure 2 It is the structural schematic diagram of the first fixed frame of the utility model and the threaded hole cooperation.

[0019] Figure 3 The adjusting mechanism structure schematic view of the utility model.

[0020] Figure 4 The connecting groove and the card slot cooperate structure schematic view of the utility model.

[0021] Figure 5 The utility model discloses Figure 4 The enlarged schematic view of A.

[0022] Mark annotation: 1, first fixed frame;2, second fixed frame;3, adjusting mechanism;301, connecting groove;302, card slot;303, connecting block;304, spring groove;305, spring;306, card pin;4, recess;5, threaded hole. Specific implementation

[0023] In order to make the utility model's purpose, technical scheme and advantage more clearly clear, following combining with the drawing and example, the utility model carries out further detailed explanation.

[0024] In one embodiment, as Figures 1-5 The rat femur ankle defect fixing support, including first fixed frame 1 and second fixed frame 2, one end of first fixed frame 1 is equipped with second fixed frame 2, the inside of first fixed frame 1 is equipped with the adjusting mechanism 3 of the fixed support length that can be adjusted according to the femur length, make the fixed support of can carry out length adjustment, make it can be applicable to different length femur.

[0025] In one embodiment, as Figures 3-5As shown, the adjusting mechanism 3 comprises a connecting groove 301, a clamping groove 302, a connecting block 303, a spring groove 304, a spring 305 and a clamping pin 306, one end of the first fixed frame 1 is internally provided with the connecting groove 301, a plurality of clamping grooves 302 are provided on one side of the connecting groove 301, the inner wall of the connecting groove 301 is slidably connected with the connecting block 303, one end of the connecting block 303 is fixedly connected with the second fixed frame 2, one end of the connecting block 303 is provided with the spring groove 304, the spring groove 304 is internally provided with the spring 305, one end of the spring 305 is fixedly connected with the spring groove 304, the other end is fixedly connected with the clamping pin 306, the outer wall of the clamping pin 306 is matched with the clamping groove 302, when it is needed to adjust the length of the fixed support according to the length of the femur, the second fixed frame 2 is pulled to make the connecting block 303 slide in the connecting groove 301, the interior of the first fixed frame 1 will press the clamping pin 306 and the spring 305, when the position of the connecting block 303 is appropriate, the spring 305 resets to push the clamping pin 306 into the interior of the clamping groove 302, so that the second fixed frame 2 is connected with the first fixed frame 1 through the connecting block 303, the spring 305 resets to push the clamping pin 306 into the interior of the different clamping grooves 302, so that the distance between the first fixed frame 1 and the second fixed frame 2 can be adjusted, so that it can be suitable for femurs of different lengths.

[0026] In one embodiment, as shown in Figure 3 The size of the inner wall of the connecting groove 301 is consistent with the size of the outer wall of the connecting block 303, when the connecting block 303 slides in the interior of the connecting groove 301, the connecting groove 301 can limit the sliding of the connecting block 303, preventing the connecting block 303 from shaking in the interior of the connecting groove 301.

[0027] In one embodiment, as shown in Figure 5 The diameter size of the spring groove 304 is consistent with the diameter size of the spring 305, when the spring 305 stretches and contracts, the spring groove 304 will limit the spring 305, avoiding the spring 305 from shaking.

[0028] In one embodiment, as shown in Figure 2 A plurality of threaded holes 5 are provided on the surface of the first fixed frame 1, the second fixed frame 2 and the connecting block 303, the inner wall of the threaded hole 5 is threadedly connected with a screw, the first fixed frame 1 and the second fixed frame 2 are attached to the femur, the screw passes through the threaded hole 5 respectively, so that the first fixed frame 1 and the second fixed frame 2 can be completely fixed together with the femur.

[0029] In one embodiment, as shown in Figure 1 A plurality of grooves 4 are provided on the two sides of the first fixed frame 1 and the second fixed frame 2, after the first fixed frame 1 and the second fixed frame 2 are fixed on the femur, the femur and the fixed frame are wound and tied through the grooves 4 by the steel wire, so that the position between the steel wire and the fixed frame and the bone surface will not move.

[0030] In one embodiment, as shown in Figure 1 the left side of the first and second fixed frame 1 and 2 is thicker than the right side, and the left side end surface of the first and second fixed frame 1 and 2 is transitioned to the right side end surface by the concave arc surface, which can make the first and second fixed frame 1 and 2 better fit the femur.

[0031] In one embodiment, as shown in Figure 1 the surface of the first and second fixed frame 1 and 2 is coated with a layer of hydroxyapatite material, which can promote the attachment and growth of bone cells and accelerate the healing of fractures.

[0032] Working principle: the above embodiment discloses a rat femoral ankle defect fixing bracket, wherein, when the length of the fixed bracket needs to be adjusted according to the length of the femur during use, the second fixed frame 2 is pulled, the connecting block 303 slides in the connecting groove 301, the inside of the first fixed frame 1 extrudes the catch pin 306 and the spring 305, when the connecting block 303 is in the right position, the spring 305 resets to push the catch pin 306 into the inside of the card slot 302, so that the second fixed frame 2 is connected with the first fixed frame 1 through the connecting block 303, the spring 305 resets to push the catch pin 306 into the inside of the different card slot 302, so that the distance between the first and second fixed frame 1 and 2 can be adjusted, which can be suitable for femurs of different lengths, the side surface of the first and second fixed frame 1 and 2 is fitted with the femur, the thinner side is fitted with the thicker side of the femur, and the thicker side is fitted with the thinner side of the femur, so that the fixed frame and the femur can be better fitted, the screws pass through the threaded holes 5 respectively, so that the first and second fixed frame 1 and 2 can be completely fixed with the femur, and then the steel wire is wound around the femur and the fixed frame through the groove 4, so that the position between the steel wire and the fixed frame and the bone surface will not move, so that the fixation of the fixed frame and the femur is more stable.

[0033] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A fixation frame for rat femoral ankle defects, comprising a first fixation frame (1) and a second fixation frame (2), wherein one end of the first fixation frame (1) is provided with the second fixation frame (2), characterized in that: The first fixation frame (1) is provided with an adjustment mechanism (3) that can adjust the length of the fixation frame according to the length of the femur; The adjustment mechanism (3) includes a connecting groove (301), a slot (302), a connecting block (303), a spring groove (304), a spring (305), and a locking pin (306). The first fixing frame (1) has a connecting groove (301) inside one end. Multiple slots (302) are provided on one side of the connecting groove (301). The connecting block (303) is slidably connected to the inner wall of the connecting groove (301). The second fixing frame (2) is fixedly connected to one end of the connecting block (303). The spring groove (304) is provided to one end of the connecting block (303). The spring (305) is provided inside the spring groove (304). The spring (305) is fixedly connected to the spring groove (304) at one end and to the locking pin (306) at the other end. The outer wall of the locking pin (306) cooperates with the slot (302).

2. The rat femoral ankle defect fixation bracket according to claim 1, characterized in that: The inner wall dimensions of the connecting groove (301) match the outer wall dimensions of the connecting block (303).

3. The rat femoral ankle defect fixation bracket according to claim 1, characterized in that: The diameter of the spring groove (304) matches the diameter of the spring (305).

4. The rat femoral ankle defect fixation bracket according to claim 1, characterized in that: The surfaces of the first fixing bracket (1), the second fixing bracket (2) and the connecting block (303) are provided with multiple sets of threaded holes (5), and the inner walls of the threaded holes (5) are threaded with screws.

5. The rat femoral ankle defect fixation bracket according to claim 4, characterized in that: Multiple sets of grooves (4) are provided on both sides of the first fixing frame (1) and the second fixing frame (2).

6. The rat femoral ankle defect fixation bracket according to claim 1, characterized in that: The thickness of the left side of the first fixing frame (1) and the second fixing frame (2) is greater than the thickness of the right side, and the left end face and the right end face of the first fixing frame (1) and the second fixing frame (2) are transitioned by an inwardly concave arc surface.

7. The rat femoral ankle defect fixation bracket according to claim 1, characterized in that: The surfaces of the first fixing frame (1) and the second fixing frame (2) are coated with a layer of hydroxyapatite material.

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