Adjustable fixing and positioning assembly for skull defect modeling

Abstract

The invention provides an adjustable fixing and positioning assembly for skull defect modeling, and belongs to the technical field of medical instruments. Comprising a molding supporting plate, four supporting protrusions are fixedly connected to the outer wall of the bottom of the molding supporting plate and distributed in a circumferential array, a first rotating groove is formed in the outer wall of the top of the molding supporting plate, a rotating supporting plate is rotationally connected to the inner wall of the first rotating groove, and a molding limiting block is fixedly connected to the outer wall of the top of the rotating supporting plate; the fixing assembly is used for fixing the head of the rat; the limiting assembly is used for limiting the skull electric drill. By arranging the fixing assembly, in the process of fixing the head of the rat, the operation process is simple, the time for fixing the head of the rat can be saved, and the experiment efficiency is improved; by arranging the limiting assembly, when the modeling angle of the skull electric drill is adjusted, the skull electric drill is forced to move in the direction away from a rat, and the situation that the skull electric drill scratches the rat and influences a modeling experiment is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical appliances, and particularly relates to an adjustable fixing and positioning assembly for skull defect modeling. Background Art

[0002] Skull defect modeling refers to artificially creating a bone defect of a certain size and shape in the skull area of a rat through surgical methods to simulate human skull injuries or disease states, and then being used to study bone healing, bone regeneration, and evaluate the effects of bone tissue engineering biomaterials.

[0003] When performing anterior skull defect modeling on a rat, first anesthetize the rat and do preoperative preparations (such as shaving the head, disinfecting, and exposing the skull area), make a longitudinal surgical incision along the sagittal line of the skull, and layer by layer separate the soft tissues to expose the relevant bone area; during the drilling and modeling stage, drill holes at different positions according to the defect diameter, fully strip the periosteum before drilling, connect a hollow drill bit to an electric drill and drill at a low speed, and use a dissector for blunt separation to reduce damage when approaching drilling through; after the operation, rinse the surgical field with normal saline, layer by layer close the incision after no active bleeding, resuscitate the rat and send it back to the breeding cage for feeding, and analyze the bone defect healing situation by histological and radiological methods after the operation to evaluate the difference in the effects of bone tissue engineering biomaterials.

[0004] During the process of skull defect modeling, if the head of the rat is not fixed, the subsequent experimental operations will be affected due to the shaking of the rat's head; currently, when fixing the rat's head on a plane using adhesive tape, since the skull is mostly an arc-shaped irregular plane, after fixing according to the traditional method, the skull drill bit and the skull form a certain inclination angle, and during modeling, the drill bit will deviate due to uneven force, affecting the postoperative healing of the rat. In addition, when using a skull electric drill for modeling, it is necessary to hold the skull electric drill by hand, and the drill bit will show unstable holding during high-speed rotation. Therefore, the present invention provides an adjustable fixing and positioning assembly for skull defect modeling to meet the requirements. Summary of the Invention

[0005] The present invention provides an adjustable fixing and positioning assembly for skull defect modeling. By setting a fixing assembly, it is possible to avoid the situation where the drill bit deviates due to uneven force between the skull drill bit and the rat's skull during modeling, thereby preventing this deviation phenomenon from having an adverse impact on the postoperative healing of the rat. By setting a limiting assembly, it is possible to prevent the electric drill bit from being unstable during high-speed rotation, and it is also possible to force the skull electric drill to displace away from the rat during the corresponding adjustment of the skull electric drill, preventing the skull electric drill from scratching the rat when adjusting the modeling angle, and avoiding interference variables that affect the modeling experimental results derived from accidental situations such as the rat being injured.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] An adjustable fixing and positioning component for skull defect modeling, comprising a modeling support plate, a fixing component and a limiting component. Four support protrusions are fixedly connected to the bottom outer wall of the modeling support plate, distributed in a circumferential array. A first rotation groove is opened on the top outer wall of the modeling support plate, and a rotating support plate is rotatably connected to the inner wall of the first rotation groove. A modeling limiting block is fixedly connected to the top outer wall of the rotating support plate. A fixing component for fixing the head of a rat and a limiting component for limiting a skull drill are arranged on the modeling limiting block.

[0008] Optionally, the fixing component includes a support tube fixedly connected to the outer wall of the modeling limiting block and a threaded through hole opened on the middle outer wall of the modeling limiting block. One end of the support tube is fixedly connected to a fixing clip, and the same first elastic plate is fixedly connected to the bottom outer walls of the fixing clip near both ends.

[0009] Optionally, the same second elastic plate is fixedly connected to one inner wall of the fixing clip. A weakening groove is opened on the outer wall of the second elastic plate, and clamping protrusions are symmetrically and fixedly connected to the outer walls of the fixing clip near both ends.

[0010] Optionally, two third elastic plates are fixedly connected to the top outer wall of the first elastic plate. The same support tray is fixedly connected to one end of each of the two third elastic plates. A curved fixing plate is fixedly connected to the outer wall of one end of the support tray, and a first rotating threaded column is screwed on the inner wall of the threaded through hole.

[0011] Optionally, the limiting component includes a first sliding groove and a second sliding groove symmetrically opened on the top outer inner wall of the modeling limiting block. A sliding column is fixedly connected to the inner wall of the first sliding groove, a second rotation groove is opened on the inner wall of the second sliding groove, and a second rotating threaded column is rotatably connected to the inner wall of the second rotation groove.

[0012] Optionally, a sliding support plate is slidably connected to the outer wall of the sliding column. A plurality of limiting grooves are opened on the outer wall of the sliding support plate. A sliding fixing seat is slidably connected to the outer wall of the sliding support plate. An avoidance groove is opened on the top outer wall of the sliding fixing seat, and a circular through hole is opened on the bottom inner wall of the sliding fixing seat.

[0013] Optionally, fourth elastic plates are fixedly connected to the inner walls of both ends of the sliding fixing seat. A pressing handle is fixedly connected to one end of the fourth elastic plate, and a fifth elastic plate is fixedly connected to the outer wall of the pressing handle near one end of the fourth elastic plate.

[0014] Optionally, a sixth elastic plate is fixedly connected to the outer wall of the pressing handle. Limiting columns are symmetrically and fixedly connected to the outer walls of the sixth elastic plate near both ends.

[0015] Optionally, elastic tubes are symmetrically and fixedly connected to the outer walls on both sides of the sliding fixing seat, and an abutting column is fixedly connected to one end of each elastic tube.

[0016] Optionally, a limiting sleeve plate is fixedly connected to one end of the fifth elastic plate. A plurality of segmented grooves are respectively formed in the outer walls of the limiting sleeve plate near the top and near the bottom, and two seventh elastic plates are fixedly connected to the outer wall of the limiting sleeve plate.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above solution, by providing the fixing assembly, it can be used to fix the head of the rat, and can avoid the situation that the drill bit deflects due to uneven force between the skull drill bit and the rat skull during modeling, thereby preventing this deflection phenomenon from having an adverse impact on the postoperative healing of the rat. In addition, throughout the entire operation process of fixing the rat's head, the operation method is simple and easy to implement, saving the time consumed in fixing the rat's head and improving the overall efficiency of the experiment.

[0019] By providing the limiting assembly, it can be used to limit the skull drill. In order to prevent the drill bit of the skull drill from being unstable during high-speed rotation when using the skull drill for modeling, during the corresponding adjustment of the skull drill, the skull drill can be forced to displace away from the rat, preventing the skull drill from scratching the rat when adjusting the modeling angle, and avoiding the interference variable that affects the modeling experiment result derived from accidental situations such as the rat being injured, so as to ensure that the modeling experiment can proceed orderly under stable and precise conditions.

[0020] By providing a fixing clip, a support tube, a first rotating threaded column, a second elastic plate and a weakening groove in the fixing assembly, the effective clamping of the rat's head by the fixing clip can be easily achieved by rotating the first rotating threaded column. This operation method is very simple and fast, can greatly save the time consumed in fixing the rat's head, and thus effectively improve the experimental efficiency.

[0021] By providing a first elastic plate, a support tray and a curved fixing plate in the fixing assembly, the body of the rat can be lifted by the support tray, so that the head and body of the rat are on the same horizontal plane, which can effectively avoid the vibration generated during modeling from damaging the rat's spine, and thus prevent the subsequent experimental results from being interfered due to spinal damage.

[0022] By arranging a first sliding groove, a second sliding groove, a sliding column, a second rotating threaded column and a sliding support plate inside the limiting component, by rotating one end of the second rotating threaded column with an anti-slip groove, the position of the sliding support plate can be flexibly adjusted to be at the position where the rat needs to be modeled, so as to meet the requirements of the experiment. Such a setting improves the convenience of the device during actual use and provides a strong guarantee for the smooth progress of the experiment.

[0023] By arranging a sliding fixed seat, a limiting column, a pressing handle, a fourth elastic plate, a fifth elastic plate, a sixth elastic plate and a limiting sleeve plate inside the limiting component, not only can the outer wall contour of the cranial drill be adapted, thereby providing a stable and effective fixing effect for the cranial drill, but also according to the specific requirements of the experiment, the user can slide the sliding fixed seat along the outer wall of the sliding support plate to adjust the modeling angle of the cranial drill bit, so that it can better serve the experimental operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0025] Figure 1 It is a first perspective three-dimensional structural schematic diagram of an adjustable fixed positioning component for cranial defect modeling;

[0026] Figure 2 It is a second perspective three-dimensional structural schematic diagram of an adjustable fixed positioning component for cranial defect modeling;

[0027] Figure 3 It is an enlarged three-dimensional structural schematic diagram of the modeling support plate and the first rotating groove in cooperation;

[0028] Figure 4 It is an enlarged three-dimensional structural schematic diagram of the rotating support plate and the modeling limiting block in cooperation;

[0029] Figure 5 It is an enlarged three-dimensional structural schematic diagram of the rotating support plate, the fixed clamp and the modeling limiting block in cooperation;

[0030] Figure 6 For Figure 5 The enlarged three-dimensional structural schematic diagram at position A in

[0031] Figure 7 For Figure 6 The enlarged three-dimensional structural schematic diagram at position B in

[0032] Figure 8 It is an enlarged three-dimensional structural schematic diagram of the third elastic plate and the support plate in cooperation;

[0033] Figure 9Schematic enlarged three-dimensional structure diagram of the sliding support plate and the second rotating threaded column;

[0034] Figure 10 Schematic enlarged three-dimensional structure diagram of the sliding fixed seat and the elastic tube;

[0035] Figure 11 Schematic enlarged first-view three-dimensional structure diagram of the sliding fixed seat and the limiting sleeve plate;

[0036] Figure 12 Schematic enlarged second-view three-dimensional structure diagram of the sliding fixed seat and the limiting sleeve plate;

[0037] Figure 13 Schematic enlarged first-view three-dimensional structure diagram of the fourth elastic plate, the fifth elastic plate and the sixth elastic plate;

[0038] Figure 14 Schematic enlarged second-view three-dimensional structure diagram of the fourth elastic plate, the fifth elastic plate and the sixth elastic plate.

[0039] Reference numerals:

[0040] 1. Molding support plate; 101. Support protrusion; 102. First rotating groove; 2. Rotating support plate; 201. Molding limiting block; 202. First sliding groove; 203. Second sliding groove; 204. Sliding column; 205. Second rotating groove; 206. First rotating threaded column; 207. Threaded through hole; 3. Support tube; 301. Fixed clamp; 302. First elastic plate; 303. Second elastic plate; 304. Clamping protrusion; 305. Third elastic plate; 306. Support support plate; 307. Curved fixing plate; 308. Weakening groove; 4. Sliding support plate; 401. Second rotating threaded column; 402. Limiting groove; 5. Sliding fixed seat; 501. Avoidance groove; 502. Circular through hole; 503. Elastic tube; 504. Abutting column; 505. Limiting hole; 6. Fourth elastic plate; 601. Pressing handle; 602. Fifth elastic plate; 603. Sixth elastic plate; 604. Limiting column; 605. Limiting sleeve plate; 606. Seventh elastic plate.

[0041] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0042] The following will describe in detail an adjustable fixing and positioning component for skull defect modeling provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0043] It should be noted that in the specification, references to "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when combining embodiments to describe a specific feature, structure, or characteristic, implementing such feature, structure, or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0044] Generally, terms can be understood at least in part from their use in context. For example, at least in part depending on the context, the term "one or more" used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, can allow for the existence of other factors that may not be explicitly described.

[0045] It can be understood that the meanings of "on...", "above...", and "over..." in the present invention should be interpreted in the broadest manner, such that "on..." not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above..." or "over..." not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0046] Furthermore, spatial relative terms such as "under...", "below...", "lower", "above...", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the accompanying drawings. Spatial relative terms are intended to cover different orientations in the use or operation of the device other than the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptive terms used herein can be similarly interpreted accordingly.

[0047] As Figures 1 to 14As shown, an embodiment of the present invention provides an adjustable fixing and positioning component for skull defect modeling, including a modeling support plate 1. Four support protrusions 101 are fixedly connected to the outer wall of the bottom of the modeling support plate 1, and are distributed in a circumferential array. A first rotation groove 102 is opened on the outer wall of the top of the modeling support plate 1. A rotation support plate 2 is rotatably connected to the inner wall of the first rotation groove 102. A modeling limit block 201 is fixedly connected to the outer wall of the top of the rotation support plate 2; a fixing component for fixing the head of a rat, and the fixing component is connected to the modeling limit block 201; a limiting component for limiting a skull drill, and the limiting component is connected to the modeling limit block 201. Specifically, the modeling support plate 1 included in this device is an acrylic circular plate. The acrylic modeling support plate 1 has certain corrosion resistance and a long service life. One end of the four support protrusions 101 is fixedly connected to the outer wall of the bottom of the modeling support plate 1 and is distributed in a circumferential array. The support protrusion 101 is composed of two cylinders with different diameters, is made of acrylic material, and has an anti-slip treatment on the outer wall of the end of the support protrusion 101 away from the modeling support plate 1, so as to avoid the phenomenon of slipping of the support protrusion 101 when using this device, which affects the experiment of skull defect modeling on rats. The first rotation groove 102 is opened at the center of the outer wall of the top of the modeling support plate 1. The first rotation groove 102 is a circular groove with a "convex" cross-section. The rotation support plate 2 is rotatably connected to the inner wall of the first rotation groove 102. The overall contour of the rotation support plate 2 is adapted to the contour of the first rotation groove 102 and is a circular plate made of acrylic material. The modeling limit block 201 is fixedly connected to the outer wall of the top of the rotation support plate 2. The modeling limit block 201 is an inverted "concave"-shaped metal block as a whole.

[0048] The fixing component provided in this application can be used to fix the head of a rat, and can avoid the situation that the drill bit deviates due to uneven force between the skull drill bit and the rat's skull during modeling, thereby preventing this deviation phenomenon from having an adverse impact on the postoperative healing of the rat. In addition, in the entire operation process of fixing the rat's head, its operation method is simple and easy to perform, saving the time consumed in fixing the rat's head and improving the overall efficiency of the experiment. The limiting component provided in this application can be used to limit a skull drill. In order to prevent the drill bit of the skull drill from being unstable when rotating at high speed during skull drill modeling, and during the corresponding adjustment of the skull drill, the skull drill can be forced to displace away from the rat, preventing the skull drill from scratching the rat when adjusting the modeling angle, and avoiding interference variables that affect the modeling experiment results due to accidents such as rat injuries, so as to ensure that the modeling experiment can be carried out orderly under stable and accurate conditions.

[0049] As Figures 5 to 8As shown, the fixing component includes a support tube 3 fixedly connected to the outer wall of the molding limit block 201, and a threaded through hole 207 opened on the outer wall of the middle part of the molding limit block 201. One end of the support tube 3 is fixedly connected with a fixing clip 301. The same first elastic plate 302 is fixedly connected to the bottom outer walls of the fixing clip 301 near both ends. The same second elastic plate 303 is fixedly connected to one inner wall of the fixing clip 301. A weakening groove 308 is opened on one outer wall of the second elastic plate 303. Clamping protrusions 304 are symmetrically fixedly connected to the outer walls of the fixing clip 301 near both ends. A first rotating threaded column 206 is screwed on the inner wall of the threaded through hole 207. Two third elastic plates 305 are fixedly connected to the top outer wall of the first elastic plate 302. The same support tray 306 is fixedly connected to one end of each of the two third elastic plates 305. A curved fixing plate 307 is fixedly connected to the outer wall of one end of the support tray 306.

[0050] Specifically, as Figure 5 and Figure 6 shown, one end of the support tube 3 included in the fixing component is fixedly connected to one side outer wall of the middle part of the molding limit block 201. The support tube 3 is a metal round tube. The fixing clip 301 is fixedly connected to one end of the support tube 3. The fixing clip 301 is a "U"-shaped metal plate. When the fixing clip 301 is stressed, both ends will deform towards the middle to form a clamping effect. Both ends of the first elastic plate 302 are fixedly connected to the bottom outer walls of the fixing clip 301 near both ends. The first elastic plate 302 is a "W"-shaped metal plate. When the first elastic plate 302 is stressed, it will deform along its bending direction. At this time, the middle part of the first elastic plate 302 will lift the head of the rat during the deformation process. Both ends of the second elastic plate 303 are fixedly connected to the outer wall of the same fixing clip 301 far from the support tube 3. The second elastic plate 303 is an arc-shaped metal plate, and an arc-shaped weakening groove 308 is opened at the middle position of the outer wall of the second elastic plate 303 near the support tube 3. The bending direction of the second elastic plate 303 is opposite to that of the fixing clip 301. The two clamping protrusions 304 are symmetrically fixedly connected to the outer walls of the fixing clip 301 near both ends. The clamping protrusion 304 is composed of two parts: a metal cuboid and a metal cylinder. The end of the clamping protrusion 304 with the metal cylinder will displace towards the rat during the deformation process of the fixing clip 301 until the head of the rat is fixed. As Figure 4 、 Figure 5 and Figure 8As shown, the threaded through-hole 207 is opened on one side outer wall of the middle part of the mold-making limiting block 201. The first rotating threaded column 206 is screwed on the inner wall of the threaded through-hole 207. The first rotating threaded column 206 is composed of three parts: a metal ball, a metal cylinder with threads, and a metal cylinder with anti-slip grooves. The first rotating threaded column 206 passes through the inner wall of the support tube 3, and the end with the metal ball thereof abuts against the outer wall of the second elastic plate 303 on the side where the weakening groove 308 is opened.

[0051] Specifically, as Figures 6 to 8 shown, one ends of two third elastic plates 305 are symmetrically fixed on both sides of the top outer wall of the first elastic plate 302. The third elastic plate 305 is a "C"-shaped metal plate. The other ends of the two third elastic plates 305 are respectively fixedly connected to both side outer walls of the support tray 306. The support tray 306 is composed of a metal straight plate with a plurality of segmented grooves and an arc-shaped metal plate. When a rat is placed on the support tray 306, the third elastic plate 305 will deform along its bending direction when it receives the downward pressure from the support tray 306, and the segmented grooves opened on the support tray 306 can adapt to the body contour of the rat and can stably lift the body of the rat. One end of the curved fixing plate 307 is fixedly connected to one end outer wall of the support tray 306. The curved fixing plate 307 is composed of three parts: a "C"-shaped metal plate, a wavy metal plate, and an arc-shaped metal plate. The outer wall of the curved fixing plate 307 with the wavy metal plate abuts against the bottom outer wall of the second elastic plate 303.

[0052] First, the rat with the skin prepared after anesthesia is placed on the support plate 306. At this time, the third elastic plate 305 will be deformed along the direction of its bending when it is subjected to the downward pressure of the support plate 306, and the segmented groove provided on the support plate 306 can adapt to the body contour of the rat, and the body of the rat can be stably lifted. When the end of the metal cylinder provided with the anti-skid groove on the first rotating threaded column 206 is rotated clockwise, the first rotating threaded column 206 will rotate and move in the direction of the second elastic plate 303. At this time, the end of the first rotating threaded column 206 with the metal ball will be against the outer wall of the side provided with the weakened groove 308 on the second elastic plate 303, and the middle part of the second elastic plate 303 will be subjected to the pressure of the first rotating threaded column 206, so that the two ends of the second elastic plate 303 will be deformed in the direction of the first rotating threaded column 206, and the two ends of the fixing clamp 301 will be deformed in the direction of the head of the rat. At this time, both ends of the first elastic plate 302 will be subjected to the squeezing force generated during the deformation of the fixing clamp 301, and the first elastic plate 302 will deform along its bending direction, and during the deformation of the first elastic plate 302, it will contact the top outer wall of the rotating support plate 2, and the middle part will deform in the direction away from the rotating support plate 2, which will drive the supporting support plate 306 and the rat's head to move in the direction away from the rotating support plate 2. The end of the metal cylinder fixedly connected to the clamping protrusion 304 of the fixing clamp 301 will move toward the direction of the rat during the deformation of the fixing clamp 301 until the rat's head is fixed. At the same time, during the deformation process, the second elastic member deforms in the middle portion toward the direction close to the curved fixing plate 307, and squeezes the outer wall of the wavy metal plate portion on the curved fixing plate 307, causing the portion of the "C"-shaped metal plate on the curved fixing plate 307 to deform along the direction of its bending, and driving the end of the curved metal plate portion on the curved fixing plate 307 to deform toward the direction of the rotating support plate 2, until the bottom outer wall of the curved metal plate portion on the curved fixing plate 307 fits the nose bridge of the rat. In conjunction with the metal straight plate portion with a plurality of segmented grooves on the supporting support plate 306 mentioned above, the rat's head can be fixed. The above structural setting can quickly fix the rat's head, which not only saves the time of fixing the rat's head and improves the experimental efficiency, but also can lift the rat's body, so that the rat's head and body are at the same level, avoiding the vibration generated by the skull electric drill during the modeling process. Damage to the rat's spine.

[0053] like Figure 4 and Figure 5 As shown, the limit assembly includes a first sliding groove 202 and a second sliding groove 203 symmetrically opened on the outer and inner walls of the top of the molding limit block 201, a sliding column 204 is fixedly connected to the inner wall of the first sliding groove 202, and a second rotating groove 205 is opened on the inner wall of the second sliding groove 203.Figure 9 As shown, a second rotating screw column 401 is rotatably connected to the inner wall of the second rotating groove 205, a sliding support plate 4 is slidably connected to the outer wall of the sliding column 204, and a plurality of limiting grooves 402 are formed in the outer wall of the sliding support plate 4. Specifically, as again Figures 4 to 6 As shown, the limiting assembly includes a first sliding groove 202 and a second sliding groove 203 symmetrically formed on both sides of the top outer wall of the mold-making limiting block 201. Both the first sliding groove 202 and the second sliding groove 203 are square straight grooves. A sliding column 204 is fixedly connected to the inner wall of one end of the first sliding groove 202, and the sliding column 204 is a cylindrical column made of metal. A second rotating groove 205 is formed in the inner wall of one end of the second sliding groove 203. The second rotating groove 205 is a circular groove with a cross-section in the shape of a "convex". One end of the second rotating screw column 401 is rotatably connected to the inner wall of the second rotating groove 205. The second rotating screw column 401 is composed of three parts: a "convex"-shaped metal protrusion, a metal cylinder with threads, and a metal cylinder with anti-slip grooves. One end of the sliding support plate 4 is slidably connected to the outer wall of the sliding column 204, and the other end of the sliding support plate 4 is screwed to the outer wall of the second rotating screw column 401. As again Figure 9 As shown, the sliding support plate 4 is composed of five parts: two "C"-shaped metal plates, two square metal plates, and a hollow metal cylinder with threads provided on the inner wall. A plurality of circular limiting grooves 402 are formed in the outer walls of the two "C"-shaped metal plates on the sliding support plate 4. When the end with the anti-slip groove on the second rotating screw column 401 is rotated clockwise, it will push one end of the sliding support plate 4 along the inner wall of the second sliding groove 203 and displace in the direction of the second rotating groove 205, and the other end of the sliding support plate 4 will slide on the outer wall of the sliding column 204. When the end with the anti-slip groove on the second rotating screw column 401 is rotated counterclockwise, it will push one end of the sliding support plate 4 along the inner wall of the second sliding groove 203 and displace in the direction away from the second rotating groove 205. With the above structural arrangement, the end with the anti-slip groove on the second rotating screw column 401 can be rotated according to actual needs to adjust the sliding support plate 4 to a suitable position.

[0054] As Figures 10 to 14As shown, a sliding fixing seat 5 is slidably connected to the outer wall of the sliding support plate 4. An avoidance groove 501 is formed in the top outer wall of the sliding fixing seat 5, and a circular through hole 502 is formed in the bottom inner wall of the sliding fixing seat 5. Fourth elastic plates 6 are fixedly connected to the inner walls at both ends of the sliding fixing seat 5. One end of the fourth elastic plate 6 is fixedly connected to a pressing handle 601. A fifth elastic plate 602 is fixedly connected to the outer wall of the pressing handle 601 near one end of the fourth elastic plate 6. A sixth elastic plate 603 is fixedly connected to one side outer wall of the pressing handle 601. Limit posts 604 are symmetrically and fixedly connected to the outer walls near both ends of the sixth elastic plate 603. Elastic tubes 503 are symmetrically and fixedly connected to the outer walls on both sides of the sliding fixing seat 5. One end of the elastic tube 503 is fixedly connected to an abutting post 504. One end of the fifth elastic plate 602 is fixedly connected to a limit sleeve plate 605. A plurality of segmented grooves are respectively formed in the outer wall of the limit sleeve plate 605 near the top and near the bottom. Two seventh elastic plates 606 are fixedly connected to the outer wall of the limit sleeve plate 605.

[0055] Specifically, as Figure 10 shown, the sliding fixing seat 5 is slidably connected to the outer wall of the "C"-shaped metal plate portion of the sliding support plate 4. The sliding fixing seat 5 is a sector-shaped metal block. Two slots that penetrate through both ends of the sliding fixing seat 5 and whose contours are adapted to the contour of the "C"-shaped metal plate portion of the sliding support plate 4 are formed in the outer wall of the sliding fixing seat 5, facilitating sliding on the outer wall of the sliding support plate 4. The avoidance groove 501 is formed in the top outer wall of the sliding fixing plate. The avoidance groove 501 is a sector-shaped groove body. A circular through hole 502 is formed at the center position of the bottom inner wall of the avoidance groove 501. The circular through hole 502 is for avoiding the cranial drill. One ends of the two elastic tubes 503 are symmetrically and fixedly connected to the inner walls on both sides of the avoidance groove 501. The elastic tube 503 is a metal tube with a curved end and a "C"-shaped middle portion. With the cooperation of the two elastic tubes 503, a fixing effect can be provided for the cranial drill. The abutting post 504 is fixedly connected to the outer wall of the elastic tube 503 at the end far from the curved end. The abutting post 504 is a metal cylinder with curved ends at both ends. Two limit holes 505 are symmetrically formed in the inner walls on both sides of the sliding fixing seat 5 near the sliding column 204. The limit hole 505 is a circular groove body.

[0056] Specifically, as Figures 11 to 14As shown, one end of two fourth elastic plates 6 is symmetrically and fixedly connected to the inner wall near the bottom of the sliding fixed seat 5. The fourth elastic plate 6 is an "S"-shaped metal plate. When the fourth elastic plate 6 is stressed, it will deform along the direction of its bend. One end of the pressing handle 601 close to the rotating support plate 2 is fixedly connected to the other end of the fourth elastic plate 6. The pressing handle 601 is composed of a square metal plate and a metal cylinder. On the outer wall of the pressing handle 601 close to the end fixedly connected to the fourth elastic plate 6, a fifth elastic plate 602 is fixedly connected. The fifth elastic plate 602 is an "S"-shaped metal plate. When the fifth elastic plate 602 is stressed, it will deform along the direction of its bend. For the pressing handle 601 among the two pressing handles 601 close to the sliding column 204, on the outer wall of the side far from the fifth elastic plate 602 and near the middle, a sixth elastic plate 603 is fixedly connected. The sixth elastic plate 603 is a "C"-shaped metal plate. One end of two limiting columns 604 is symmetrically and fixedly connected to the outer walls of the sixth elastic plate 603 near both ends. The limiting column 604 is a metal cylinder with a radian at one end. The limiting column 604 passes through the limiting hole 505 and is inserted into the limiting groove 402 opened on the sliding plate, which can limit the sliding fixed seat 5. The outer walls of the two abutting columns 504 mentioned above are symmetrically abutted against both sides of the sixth elastic plate 603 close to the outer wall of the fifth elastic plate 602. One end of two fifth elastic plates 602 far from the pressing handle 601 is symmetrically and fixedly connected to the outer wall of the limiting sleeve plate 605. The limiting sleeve plate 605 is composed of an arc-shaped metal circular plate with an outward expansion at the top, a hollow precious metal cylinder in the middle, and an arc-shaped metal circular plate with an inward contraction at the bottom. And on the outer walls of the limiting sleeve plate 605 close to the bottom and near the bottom, a number of segmented grooves are respectively opened. When inserting the cranial drill, the top of the limiting sleeve plate 605 will deform along the direction of its bend under the cooperation of the segmented grooves, and the bottom of the limiting sleeve plate 605 will deform along the direction of its bend under the cooperation of the segmented grooves, which can fix the cranial drill. In this way, it can adapt to the outer wall contour of the cranial drill and provide an effective fixing effect for the cranial drill. One end of two seventh elastic plates 606 is symmetrically and fixedly connected to the outer wall of the limiting sleeve plate 605. The other end of the seventh elastic plate 606 is fixedly connected to the outer wall of the sliding fixed seat 5 near the middle position at the top. The seventh elastic plate 606 is an "S"-shaped metal plate. When the seventh elastic plate 606 is stressed, it will deform along the direction of its bend.

[0057] When the user pinches the two pressing handles 601 with the index finger and thumb, the two pressing handles 601 are displaced in the direction opposite to each other. At this time, the sixth elastic plate 603 is stressed and deformed along its bending direction. With the cooperation of the two abutting pressing forces, the two ends of the sixth elastic plate 603 are deformed in the direction opposite to each other, and drive the two limit posts 604 to be displaced in the direction opposite to each other. At this time, the limit posts 604 are pulled out from the limit slots 402, and the limitation of the sliding fixed seat 5 is released. Then, the sliding fixed seat 5 can be pushed to slide on the outer wall of the sliding support plate 4 according to the experimental needs to adjust the modeling angle of the cranial drill bit. At the same time, when pinching the pressing handle 601, the fifth elastic plate 602 will be subjected to the extrusion force from the pressing handle 601 and will be deformed along its bending direction, and push the limit sleeve plate 605 to be displaced in the direction away from the sliding fixed seat 5. At this time, the cranial electric drill fixed by the limit sleeve plate 605 will follow the limit sleeve plate 605 and be displaced in the direction away from the sliding fixed seat 5. At the same time, the limit sleeve plate 605 will give a pulling force to the seventh elastic plate 606, causing the seventh elastic plate 606 to be deformed along its bending direction. When no longer pinching the two pressing handles 601, the fourth elastic plate 6, the fifth elastic plate 602 and the seventh elastic plate 606 will recover their deformations under their own elastic actions. During the process of the fourth elastic plate 6 recovering its deformation, it pulls the pressing handle 601 to reset, while the fifth elastic plate 602 and the seventh elastic plate 606 will pull the limit sleeve plate 605 to reset during the process of recovering their deformations. At this time, the cranial electric drill fixed by the limit sleeve plate 605 will follow the limit sleeve plate 605 and be displaced in the direction of the sliding fixed seat 5. The above structural settings can not only fix the cranial drill bit, but also release the limitation of the sliding fixed seat 5 by pinching the pressing handle 601.

[0058] The working process of the technical solution provided by the present invention is as follows:

[0059] First, place the anesthetized and prepped rat on the support pallet 306. At this time, when the third elastic plate 305 is subjected to the downward pressure of the support pallet 306, it will deform along its bending direction. The segmented grooves provided on the support pallet 306 can adapt to the body contour of the rat and stably lift the body of the rat. When the end of the first rotating threaded column 206 with the metal cylinder provided with anti-slip grooves is rotated clockwise, the first rotating threaded column 206 will rotate and displace towards the direction of the second elastic plate 303. At this time, the end of the first rotating threaded column 206 with the metal ball will abut against the outer wall of the side of the second elastic plate 303 where the weakening groove 308 is provided. The middle part of the second elastic plate 303 will be subjected to the pressing force of the first rotating threaded column 206, causing the two ends of the second elastic plate 303 to deform towards the direction of the first rotating threaded column 206, which will drive the two ends of the fixing clip 301 to deform towards the direction of the rat's head. At this time, the two ends of the first elastic plate 302 will be subjected to the extrusion force generated during the deformation of the fixing clip 301, and the first elastic plate 302 will deform along its bending direction. During the deformation process of the first elastic plate 302, it will abut against the top outer wall of the rotating pallet 2, and its middle part will deform away from the rotating pallet 2, driving the support pallet 306 and the rat's head to displace away from the rotating pallet 2. The end of the clamping protrusion 304 of the fixing clip 301 fixedly connected with the metal cylinder will displace towards the rat during the deformation process of the fixing clip 301 until the rat's head is fixed. At the same time, during the deformation of the second elastic plate, its middle part deforms towards the direction close to the curved fixing plate 307, squeezing against the outer wall of the part of the curved fixing plate 307 with the wavy metal plate, causing the part of the curved fixing plate 307 with the "C"-shaped metal plate to deform along its bending direction, and driving the end of the part of the curved fixing plate 307 with the arc-shaped metal plate towards the direction of the rotating pallet 2 until the bottom outer wall of the part of the curved fixing plate 307 with the arc-shaped metal plate fits against the bridge of the rat's nose.

[0060] Then, when the end of the second rotating threaded column 401 with anti-slip grooves is rotated clockwise, it will push one end of the sliding support plate 4 along the inner wall of the second sliding groove 203 towards the direction of the second rotating groove 205, and the other end of the sliding support plate 4 will slide on the outer wall of the sliding column 204. When the end of the second rotating threaded column 401 with anti-slip grooves is rotated counterclockwise, it will push one end of the sliding support plate 4 along the inner wall of the second sliding groove 203 towards the direction away from the second rotating groove 205. With the above structural arrangement, the end of the second rotating threaded column 401 with anti-slip grooves can be rotated according to actual needs to adjust the sliding support plate 4 to the position on the rat's skull where modeling is required.

[0061] Then insert the cranial drill into the inner wall of the limit sleeve plate 605. At this time, the top of the limit sleeve plate 605 will deform along its bending direction under the cooperation of the segmented groove, and the bottom of the limit sleeve plate 605 will deform along its bending direction under the cooperation of the segmented groove, so that the cranial drill can be fixed. Then press the cranial drill towards the direction of the rotating support plate 2 to model the rat's skull. When it is necessary to adjust the modeling angle of the cranial drill bit, when the user's index finger and thumb pinch the two pressing handles 601, the two pressing handles 601 will displace towards each other. At this time, the sixth elastic plate 603 will deform along its bending direction under the force, and cooperate with the two resisting pressures. The two ends of the sixth elastic plate 603 will deform towards each other and drive the two limit columns 604 to displace towards each other. At this time, the limit columns 604 are pulled out from the limit grooves 402, and the limit on the sliding fixed seat 5 is released, and then the sliding fixed seat 5 can be pushed to slide on the outer wall of the sliding support plate 4 according to the experimental needs to adjust the modeling angle of the cranial drill bit. At the same time, when pinching the pressing handle 601, the fifth elastic plate 602 will be subjected to the extrusion force from the pressing handle 601 and will deform along its bending direction, and push the limit sleeve plate 605 to displace away from the sliding fixed seat 5. At this time, the cranial drill fixed by the limit sleeve plate 605 will follow the limit sleeve plate 605 to displace away from the sliding fixed seat 5. At the same time, the limit sleeve plate 605 will give a pulling force to the seventh elastic plate 606, so that the seventh elastic plate 606 will deform along its bending direction. When no longer pinching the two pressing handles 601, the fourth elastic plate 6, the fifth elastic plate 602 and the seventh elastic plate 606 will recover their deformations under their own elastic actions. During the process of the fourth elastic plate 6 recovering its deformation, it pulls the pressing handle 601 to reset, and the fifth elastic plate 602 and the seventh elastic plate 606 will pull the limit sleeve plate 605 to reset during the process of recovering their deformations. At this time, the cranial drill fixed by the limit sleeve plate 605 will follow the limit sleeve plate 605 to displace towards the sliding fixed seat 5, and then press the cranial drill again to model the rat's skull again.

[0062] This invention covers any substitutions, modifications, equivalent methods and solutions made on the essence and scope of this invention. For the public to have a thorough understanding of this invention, specific details are described in detail in the preferred embodiments of this invention. However, those skilled in the art can fully understand this invention without the description of these details. In addition, in order to avoid unnecessary confusion to the essence of this invention, well-known methods, processes, procedures, components and circuits, etc. are not described in detail.

[0063] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An adjustable fixing and positioning component for skull defect modeling, characterized in that It includes a molding pallet, a fixing component and a limiting component. Four supporting protrusions are fixedly connected to the outer wall of the bottom of the molding pallet, which are distributed in a circumferential array. A first rotating groove is formed on the outer wall of the top of the molding pallet, and a rotating pallet is rotatably connected to the inner wall of the first rotating groove. A molding limiting block is fixedly connected to the outer wall of the top of the rotating pallet. A fixing component for fixing the head of a rat and a limiting component for limiting a cranial drill are arranged on the molding limiting block.

2. The adjustable fixing and positioning assembly for skull defect modeling according to claim 1, wherein, The fixing component includes a support tube fixedly connected to the outer wall of the molding limiting block and a threaded through hole formed in the middle outer wall of the molding limiting block. A fixing clip is fixedly connected to one end of the support tube, and a same first elastic plate is fixedly connected to the bottom outer walls of the fixing clip near both ends.

3. The adjustable fixing and positioning assembly for skull defect modeling according to claim 2, wherein A same second elastic plate is fixedly connected to one inner wall of the fixing clip. A weakening groove is formed on the outer wall of one side of the second elastic plate. Clamping protrusions are symmetrically and fixedly connected to the outer walls of the fixing clip near both ends.

4. The adjustable fixing and positioning assembly for skull defect modeling according to claim 2, wherein Two third elastic plates are fixedly connected to the outer wall of the top of the first elastic plate. The ends of the two third elastic plates are fixedly connected to a same support pallet. A curved fixing plate is fixedly connected to the outer wall of one end of the support pallet. A first rotating threaded column is screwed on the inner wall of the threaded through hole.

5. The adjustable fixing and positioning assembly for skull defect modeling according to claim 1, characterized in that, The limiting component includes a first sliding groove and a second sliding groove symmetrically formed on the outer top wall of the molding limiting block. A sliding column is fixedly connected to the inner wall of the first sliding groove. A second rotating groove is formed in the inner wall of the second sliding groove, and a second rotating threaded column is rotatably connected to the inner wall of the second rotating groove.

6. The adjustable fixed positioning assembly for skull defect modeling according to claim 5, wherein, A sliding support plate is slidably connected to the outer wall of the sliding column. A number of limiting grooves are formed on the outer wall of the sliding support plate. A sliding fixing seat is slidably connected to the outer wall of the sliding support plate. An avoidance groove is formed on the outer wall of the top of the sliding fixing seat, and a circular through hole is formed in the inner wall of the bottom of the sliding fixing seat.

7. The adjustable fixing and positioning assembly for skull defect modeling according to claim 6, characterized in that, Fourth elastic plates are fixedly connected to the inner walls of both ends of the sliding fixing seat. A pressing handle is fixedly connected to one end of the fourth elastic plate. A fifth elastic plate is fixedly connected to the outer wall of the pressing handle near one end of the fourth elastic plate.

8. The adjustable fixing and positioning assembly for skull defect modeling according to claim 7, characterized in that, A sixth elastic plate is fixedly connected to the outer wall of one side of the pressing handle. Limiting columns are symmetrically and fixedly connected to the outer walls of the sixth elastic plate near both ends.

9. The adjustable fixing and positioning assembly for skull defect modeling according to claim 6, wherein, Elastic tubes are symmetrically and fixedly connected to the outer walls of both sides of the sliding fixing seat. An abutting column is fixedly connected to one end of the elastic tube.

10. The adjustable fixing and positioning assembly for skull defect modeling according to claim 7, characterized in that, A limiting sleeve plate is fixedly connected to one end of the fifth elastic plate. A number of segmented grooves are respectively formed on the outer walls of the limiting sleeve plate near the top and near the bottom. Two seventh elastic plates are fixedly connected to the outer wall of the limiting sleeve plate.

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