CT (Computed Tomography) auxiliary fixator for animals

Abstract

A CT auxiliary fixator for animals belongs to the field of medical instruments. The device comprises a base, a sliding pressing piece fixer and a jacking and fixing device, the jacking and fixing device is arranged at the bottom of the base, a plurality of sliding rails are arranged on the base, and the sliding pressing piece fixer is clamped in the sliding rails in a sliding mode. The research and development aim of the invention is to ensure accurate placement and fixation of animal legs and further improve the accuracy and reliability of experiments, and can realize effective fixation of animal legs with different body types, so as to realize accurate capture and irradiation of animal leg CT scanning and provide more scientific data basis for experiments.

Description

Technical Field

[0001] The invention relates to a CT auxiliary fixator for animals and belongs to the field of medical instruments. Background Art

[0002] MicroCT technology, a non-destructive three-dimensional imaging technology, plays multiple roles in the construction and evaluation of bone defect animal models. It can not only assist in the establishment and evaluation of bone defect models, but also dynamically monitor the repair process of bone defects and evaluate the osteogenesis of bone tissue engineering scaffolds, providing a valuable experimental tool for bone defect repair and bone tissue engineering research. These models are widely used to evaluate the regenerative capacity of bone replacement biomaterials, including but not limited to models of bone joints, tibia, and osteocartilage. By constructing models in different parts, researchers can simulate a variety of clinical scenarios and test the effectiveness of treatment methods. However, in actual operation, due to the structural limitations of MicroCT technology equipment, when shooting the target position of the animal's leg, it is often necessary to use non-metallic debris sticks or soft sponges for fixation or leg clamping, which may cause the animal's leg to be improperly placed or not firmly fixed, thereby affecting the accuracy of the experimental test results.

[0003] The existing patent discloses a device for long-term in vivo imaging of small animals and its use method, with the publication number CN111419181A. The porous array position set on the base realizes the flexible positioning or moving cabinet of the fixed pillar, providing support for the fixation of different fonts or parts. However, the design of the porous array makes the fixed pillar only able to move evenly in a limited position, unable to achieve micro-adjustment or arc movement, and lacks the accuracy of fixation. And after the fixed pillar is fixed on the base, it can only effectively control the radial stability, and cannot meet the axial stability fixation or clamping.

[0004] Therefore, there is an urgent need to propose a CT-assisted fixator for animals to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of ensuring the accurate placement and fixation of the animal's legs and further improving the accuracy and reliability of the experiment. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to determine the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0006] The technical solution of the present invention:

[0007] The CT auxiliary fixer for animals comprises a base, a sliding compression piece fixer and a tightening and fixing device. The bottom of the base is provided with the tightening and fixing device, and the base is provided with a plurality of slide rails, and the sliding compression piece fixer is slidably mounted in the slide rails.

[0008] Preferably: the tightening and fixing device includes a left-side opening piece, a right-side opening piece, a roller and a threaded column. A linear slide groove is provided at the bottom of the base. The tops of the left-side opening piece and the right-side opening piece are slidably installed in the linear slide groove. Threaded columns are fixedly installed on the left and right sides of the roller, and the threads on the threaded columns on both sides are set in opposite directions. The roller is set in the middle of the left-side opening piece and the right-side opening piece, and the threaded columns on the left and right sides of the roller respectively cooperate with the threads of the left-side opening piece and the right-side opening piece.

[0009] Preferably, the outer sides of the left-side opening piece and the right-side opening piece are processed with anti-slip patterns.

[0010] Preferably: the sliding pressure piece fixer includes a column, a slider, a retaining ring, a slip ring, a pressure piece, a pressure piece spring, an outer cylinder and a nut. A slider is arranged at the bottom of the column, a retaining ring is fixedly arranged on the column, the slip ring is arranged above the retaining ring and establishes a sliding fit with the column, a pressure piece spring is sleeved on the top of the column, the pressure piece spring is located above the slip ring, the outer cylinder is sleeved on the outside of the pressure piece spring, and the bottom of the outer cylinder is fixedly connected to the retaining ring, a guide notch is opened on the outer cylinder, the pressure piece passes through the guide notch and is hinged to the slip ring, the lower side of the column is threaded with the nut, and the nut and the slider are clamped together on the upper and lower sides of the slide rail.

[0011] Preferably, an inner arc-shaped slide rail is arranged on the base, and a sliding folding fixer is slidably mounted in the inner arc-shaped slide rail.

[0012] Preferably: the sliding and folding fixer includes a folding slide, a folding rod, a telescopic cylinder, a folding spring, a folding spring baffle and a folding spring retaining ring; the base is provided with a linear slot connected to the inner arc slide rail; the folding slide is slidably installed on the inner arc slide rail; the top of the folding slide is hinged with a folding rod; the top of the folding rod is provided with a folding spring baffle; the telescopic cylinder is slidably mounted on the outside of the folding rod; and the bottom of the telescopic cylinder is provided with a folding spring retaining ring; a folding spring is mounted on the folding rod between the folding spring baffle and the folding spring retaining ring; under the action of the folding spring, the telescopic cylinder and the folding slide are clamped together on the upper and lower sides of the inner arc slide rail.

[0013] Preferably, the base is provided with an inner folding groove connected with the inner arc-shaped slide rail, and after the folding rod in the sliding folding fixture in the inner arc-shaped slide rail is folded, the telescopic cylinder in the sliding folding fixture is clamped in the inner folding groove.

[0014] Preferably, the front side and / or the rear side of the base is hinged with an extension part, an outer arc-shaped slide rail is arranged on the extension part, and a sliding folding fixer is slidably mounted in the outer arc-shaped slide rail.

[0015] Preferably, the base is provided with an outer folding groove connected with the outer arc-shaped slide rail, and after the folding rod in the sliding folding fixture in the outer arc-shaped slide rail is folded, the telescopic cylinder in the sliding folding fixture is clamped in the outer folding groove.

[0016] The present invention has the following beneficial effects:

[0017] 1. The present invention realizes the micro-motion and flexible adjustment of the fixed positions of the sliding pressing plate holder and the sliding folding holder by means of multiple slide rails, inner arc slide rails and outer arc slide rails arranged on the base, which can meet the requirements of part position fixation;

[0018] 2. The present invention can achieve effective fixation of the axial animal legs by setting a sliding tablet fixer. In current basic experiments, there are few devices for verifying the experimental effects of animal legs, and there is no relatively accurate instrument for assistance. The design of the present invention not only solves the pain points in practical applications, but also standardizes the accuracy requirements of basic scientific research for data extraction;

[0019] 3. The setting of the extension part and the outer arc-shaped slide rail of the present invention realizes the controllable and flexible adjustment of the size of the fixed object;

[0020] 4. The tightening and fixing device provided under the base of the present invention can achieve stable adaptation in the inner groove of the microCT technical equipment, thereby achieving effective support and clamping of the base, and at the same time, the two side stretching pieces of the whole device can be in a contracted state in a normal state, so that the overall structure device appears simple and is more conducive to fixation on the inner wall of the microCT groove;

[0021] 5. The present invention can effectively fix the legs of animals of different sizes through the combined action of the sliding compression plate fixator and the sliding folding fixator, thereby realizing accurate capture and irradiation of the CT scan of the animal legs, providing a more scientific data basis for the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a stereoscopic image of the CT-assisted fixator for animals;

[0023] Figure 2 This is a diagram of the coordination and installation of the CT-assisted fixator for animals;

[0024] Figure 3 is a three-dimensional diagram of the jacking and fixing device;

[0025] Figure 4 It is the matching installation drawing of the jacking and fixing device;

[0026] Figure 5 is a perspective view of a sliding tablet holder;

[0027] Figure 6 This is the matching installation diagram of the sliding pressure piece holder;

[0028] Figure 7 is a perspective view of a sliding folding retainer;

[0029] Figure 8 This is the matching installation diagram of the sliding folding fixture;

[0030] Fig. 9 This is a diagram of the use status of the sliding and folding fixture.

[0031] In the figure: 1-base, 2-sliding pressure piece holder, 3-tightening fixture, 4-sliding folding holder, 11-slide rail, 12-straight slide groove, 13-inner arc slide rail, 14-inner folding groove, 15-extension portion, 16-outer arc slide rail, 17-outer folding groove, 21-column, 22-slider, 23-blocking ring, 24-slip ring, 25-pressure piece, 26-pressure piece spring, 27-outer cylinder, 28-nut, 29-guide notch, 31-left side opening piece, 32-right side opening piece, 33-roller, 34-threaded column, 35-anti-slip pattern, 41-folding slide, 42-folding rod, 43-telescopic cylinder, 44-folding spring, 45-folding spring block, 46-folding spring retaining ring. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0033] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection is a non-detachable connection including but not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: a fixed connection is selected as a welding connection, and a detachable connection is selected as a hinge connection.

[0034] Specific implementation method 1: Combination Figure 1-Figure 9 To illustrate this embodiment, the CT auxiliary fixator for animals of this embodiment includes a base 1, a sliding compression plate fixer 2 and a tightening and fixing device 3. The tightening and fixing device 3 is arranged at the bottom of the base 1, and a plurality of slide rails 11 are arranged on the base 1. The sliding compression plate fixer 2 is slidably mounted in the slide rails 11.

[0035] The tightening and fixing device 3 includes a left-side opening piece 31, a right-side opening piece 32, a roller 33 and a threaded column 34. A linear slide groove 12 is provided at the bottom of the base 1. The tops of the left-side opening piece 31 and the right-side opening piece 32 are slidably installed in the linear slide groove 12. Threaded columns 34 are fixedly installed on the left and right sides of the roller 33, and the threads on the threaded columns 34 on both sides are set in opposite directions. The roller 33 is set in the middle of the left-side opening piece 31 and the right-side opening piece 32. At the same time, the threaded columns 34 on the left and right sides of the roller 33 are respectively threadedly matched with the left-side opening piece 31 and the right-side opening piece 32.

[0036] The outer sides of the left-side opening piece 31 and the right-side opening piece 32 are processed with anti-skid patterns 35 or anti-sliding blocks. The left-side opening piece 31 and the right-side opening piece 32 are both arc-shaped pieces, and the two are arranged in a back-to-back manner. Through the arc-shaped structural design of the arc-shaped piece, the anti-skid patterns 35 or anti-sliding blocks generate extrusion elastic force after abutting against the inner groove wall, thereby providing key support for the continuous and effective fixation of the structure on the inner groove wall. The rigid force generated by the left-side opening piece 31 and the right-side opening piece 32 driven by the threaded column 34 is converted into the elastic force of the arc-shaped piece, which reduces the damage caused by the rigid action to the inner wall groove support and improves the stability of the fixation.

[0037] Through the structural design of the linear slide 12 slidingly cooperating with the top of the left and right support pieces 31 and 32, the threaded column 34 drives the left and right support pieces 31 and 32 to move in a straight line, ensuring that the anti-slip grooves 35 or anti-slip blocks of the left and right support pieces 31 and 32 are in parallel contact with the inner groove wall of the microCT technology equipment, achieving stable and accurate contact.

[0038] Through the threaded structure design of the two threaded columns 34 set on both sides of the roller 33, the synchronous and anteroposterior movements of the left-side expansion piece 31 and the right-side expansion piece 32 are achieved, ensuring that the left-side expansion piece 31 and the right-side expansion piece 32 are close to the inner wall at the same time, further realizing elastic effect, stable fixation, etc.

[0039] Place the base 1 in the groove of the microCT technical equipment and manually adjust the roller 33. At this time, the roller 33 rotates, and through the cooperation of the opposite threads on both sides, it drives the left-side opening piece 31 and the right-side opening piece 32 to move synchronously away from each other along the linear slide groove 12 until the anti-slip pattern 35 abuts against the inner wall of the groove of the microCT technical equipment. When the entire base 1 is suspended and fixed between the grooves, stop rotating the roller 33.

[0040] The sliding pressure piece holder 2 comprises a column 21, a slider 22, a retaining ring 23, a slip ring 24, a pressure piece 25, a pressure piece spring 26, an outer cylinder 27 and a nut 28. The bottom of the column 21 is provided with a slider 22, the column 21 is fixedly provided with a retaining ring 23, the slip ring 24 is provided above the retaining ring 23 and establishes a sliding fit with the column 21, the top of the column 21 is sleeved with a pressure piece spring 26, the pressure piece spring 26 is located above the slip ring 24, the outer cylinder 27 is sleeved on the outside of the pressure piece spring 26, and the outer cylinder The bottom of the column 27 is fixedly connected to the retaining ring 23, a guide notch 29 is opened on the outer cylinder 27, the pressing piece 25 passes through the guide notch 29 and is hinged to the sliding ring 24, the lower side of the column 21 is threadedly matched with the nut 28, and the column 21 is provided with a thread. When the nut 28 is rotated, the column 21 can be driven to move upward. Since a slider 22 is provided at the bottom of the column 21, the column 21 is fixed under the joint action of the slider 22 and the nut 28 until the nut 28 and the slider 22 are clamped together on the upper and lower sides of the slide rail 11.

[0041] The outer cylinder 27 is movably connected to the slip ring 24 and cannot fall off, that is, the outer cylinder 27 is sleeved on the slip ring 24, and the end of the outer cylinder 27 close to the slip ring 24 is constricted, thereby ensuring that the cylinder and the slip ring 24 cannot be separated under the elastic force of the pressure spring 26.

[0042] The pressing sheet 25 is in a closed and bent state in a default state, and the maximum bending angle of the pressing sheet 25 is 90°. After being lifted, the pressing sheet 25 always remains perpendicular to the column 21.

[0043] A rectangular sliding track is synchronously arranged on the back side of the slide rail 11 on the base 1 to ensure that the slider 22 always protects the column 21 from rotating during the sliding process.

[0044] Place the legs of the animal rabbit or rat on the base 1, adjust the sliding pressure plate holder 2 along the slide rail 11, move the sliding pressure plate holder 2 to a certain support position of the leg, tighten the nut 28, manually lift the pressure plate 25, and the pressure plate 25 presses against the fixed position of the leg under the action of the pressure plate spring 26 to fix it. In this embodiment, the number of sliding pressure plate holders 2 to be moved can be selected according to the position of CT shooting, and finally the leg position is arranged and fixed.

[0045] The pressing sheet 25 structure provided on the column 21 can realize the folding and resetting operation of the pressing sheet 25 as needed, and can also meet the requirements of fixing or pressing the animal's legs at multiple points, making the fixing effect more stable and reliable. The column 21 is provided with an outer cylinder 27, and the outer cylinder 27 is provided with a guide notch 29. The setting of the guide notch 29 can control the sliding ring 24 to always slide up and down in the guide notch 29, thereby ensuring that the pressing sheet 25 can receive continuous pressure when fixing the animal's legs.

[0046] By setting a plurality of slide rails 11 on the base, the sliding pressure plate fixer 2 can be adjusted accurately and flexibly to the fixed position, thereby realizing the rapid positioning of the sliding pressure plate fixer 2, and being able to fully and effectively fix the animal's legs in different positions. One or more slide rails 11 can be set according to actual application requirements, and one or more sliding pressure plate fixers 2 can also be set on each slide rail 11 as needed, thereby fully ensuring full coverage or effective adjustment of the fixed position.

[0047] Through the blocking of the column 21 and the pressing and fixing of the pressure plate 25, multi-point fixation of the legs can be achieved, which solves the problem of difficulty in fixation caused by ideal positioning deviation due to various complex situations such as poor body position, limb rolling, slight displacement, etc.

[0048] The base 1 is provided with an inner arc-shaped slide rail 13 , and a sliding folding fixture 4 is slidably mounted in the inner arc-shaped slide rail 13 .

[0049] The sliding and folding fixer 4 includes a folding slide 41, a folding rod 42, a telescopic cylinder 43, a folding spring 44, a folding spring baffle 45 and a folding spring retaining ring 46. The base 1 is provided with a linear slot 14 connected to the inner arc slide rail 13. The folding slide 41 is slidably installed on the inner arc slide rail 13. The top of the folding slide 41 is hinged with a folding rod 42, and the top of the folding rod 42 is provided with a folding spring baffle 45. The telescopic cylinder 43 is slidably sleeved on the outside of the folding rod 42, and the bottom of the telescopic cylinder 43 has a folding spring retaining ring 46. The folding rod 42 located between the folding spring baffle 45 and the folding spring retaining ring 46 is sleeved with a folding spring 44. Under the action of the folding spring 44, the telescopic cylinder 43 and the folding slide 41 are clamped together on the upper and lower sides of the inner arc slide rail 13.

[0050] The base 1 is provided with an inner folding groove 14 connected with the inner arc-shaped slide rail 13 . After the folding rod 42 in the sliding folding fixture 4 in the inner arc-shaped slide rail 13 is folded, the telescopic cylinder 43 in the sliding folding fixture 4 is clamped in the inner folding groove 14 .

[0051] Furthermore, an extension part 15 is hingedly connected to the front side and / or the rear side of the base 1 , and an outer arc-shaped slide rail 16 is arranged on the extension part 15 , and a sliding folding fixture 4 is slidably mounted in the outer arc-shaped slide rail 16 .

[0052] By setting the extensions 15 at both ends of the base 11, the support range of the sliding folding fixture 4 can be increased or decreased to meet more flexible fixing application scenarios. The folding rod 42 can rotate downward to 90° around the folding slide 41, and the rotation angle is controlled by the sliding folding fixture 4. The folded device can reduce the number of sliding folding fixtures 4 and the fixing range of the animal's legs, that is, after the sliding folding fixture 4 is folded, it can be determined that the sliding folding fixture 4 set on the arc-shaped slide groove can be removed. When the sliding folding fixture 4 is reset, the sliding folding fixture 4 can be increased, thereby adapting to the fixing or clamping in different application scenarios.

[0053] The base 1 is provided with an outer folding groove 17 connected with the outer arc-shaped slide rail 16 . After the folding rod 42 in the sliding folding fixture 4 in the outer arc-shaped slide rail 16 is folded, the telescopic cylinder 43 in the sliding folding fixture 4 is clamped in the outer folding groove 17 .

[0054] According to the fixed object, the number of tightening fixing devices 3 on the inner arc slide rail 13 or the outer arc slide rail 16 is selected. When the folding rod 42 is in a vertical state and there is no external force assistance, the telescopic cylinder 43, under the action of the folding spring 44, keeps the hinge between the folding rod 42 and the folding slide seat 41 always inside the telescopic cylinder 43, and at the same time, the bottom of the telescopic cylinder 43 always presses against the top of the inner arc slide rail 13 or the outer arc slide rail 16.

[0055] Manually pinch and lift the telescopic cylinder 43 to disengage the inner folding groove 14 or the outer folding groove 17, flip the folding rod 42 to a vertical state, drag the telescopic cylinder 43 and move along the inner arc-shaped slide rail 13 or the outer arc-shaped slide rail 16 until it moves to a fixed position, release the telescopic cylinder 43, and under the action of the folding spring 44, the telescopic cylinder 43 and the folding slide 41 are clamped together on the upper and lower sides of the inner arc-shaped slide rail 13 or the outer arc-shaped slide rail 16 and fixed in place. At this time, start the CT machine and start shooting.

[0056] By setting the inner arc slide rail 13 and the outer arc slide rail 16 structure at both ends of the base 11, a wider range of configuration or application of the sliding folding fixture 4 can be achieved to meet the leg fixing or clamping effect of animals of different body sizes. The sliding folding fixture 4 can be one or more, which will be configured according to actual use requirements.

[0057] Through the connection and setting structure of the telescopic cylinder 43 and the folding slide 41, the folding rod 42 can be bent and folded after the telescopic cylinder 43 is pulled up, and the folded folding rod 42 and the telescopic cylinder 43 just enter the inner folding groove 14 or the outer folding groove 17. The folding design of the folding rod 42 is conducive to the process of fixing the legs, when one end cannot be quickly fixed due to obstacles. The inner folding groove 14 or the outer folding groove 17 set on the base 11 is used to fully hide the folded telescopic cylinder 43, providing enough space for leg fixing, improving fixing efficiency, and reducing fixing difficulty.

[0058] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A CT-assisted fixator for animals, characterized in that: The invention comprises a base (1), a sliding pressure piece fixer (2) and a tightening and fixing device (3); the bottom of the base (1) is provided with the tightening and fixing device (3); the base (1) is provided with a plurality of slide rails (11); and the sliding pressure piece fixer (2) is slidably mounted in the slide rails (11).

2. The CT-assisted fixator for animals according to claim 1, characterized in that: The tightening and fixing device (3) comprises a left-side opening piece (31), a right-side opening piece (32), a roller (33) and a threaded column (34); a linear slide groove (12) is provided at the bottom of the base (1); the tops of the left-side opening piece (31) and the right-side opening piece (32) are both slidably mounted in the linear slide groove (12); threaded columns (34) are fixedly mounted on the left and right sides of the roller (33); and the threads on the threaded columns (34) on both sides are arranged in opposite directions; the roller (33) is arranged between the left-side opening piece (31) and the right-side opening piece (32); and the threaded columns (34) on the left and right sides of the roller (33) are respectively threadably matched with the left-side opening piece (31) and the right-side opening piece (32).

3. The CT-assisted fixator for animals according to claim 2, characterized in that: The outer sides of the left-side opening piece (31) and the right-side opening piece (32) are both processed with anti-slip patterns (35).

4. The CT-assisted fixator for animals according to claim 1, characterized in that: The sliding pressure plate holder (2) comprises a column (21), a slider (22), a retaining ring (23), a sliding ring (24), a pressure plate (25), a pressure plate spring (26), an outer cylinder (27) and a nut (28). The bottom of the column (21) is provided with a slider (22), the column (21) is fixedly provided with a retaining ring (23), the sliding ring (24) is provided above the retaining ring (23) and establishes a sliding fit with the column (21), and the top of the column (21) is provided with a pressure plate spring (26) ), the pressure plate spring (26) is located above the slip ring (24), the outer cylinder (27) is sleeved on the outside of the pressure plate spring (26), and the bottom of the outer cylinder (27) is fixedly connected to the retaining ring (23), the outer cylinder (27) is provided with a guide notch (29), the pressure plate (25) passes through the guide notch (29) and is hinged to the slip ring (24), the lower side of the column (21) is threadedly matched with the nut (28), and the nut (28) and the slider (22) are clamped together on the upper and lower sides of the slide rail (11).

5. The CT-assisted fixator for animals according to claim 4, characterized in that: The base (1) is provided with an inner arc-shaped slide rail (13), and a sliding folding fixture (4) is slidably mounted inside the inner arc-shaped slide rail (13).

6. The CT-assisted fixator for animals according to claim 5, characterized in that: The sliding folding fixture (4) comprises a folding slide (41), a folding rod (42), a telescopic cylinder (43), a folding spring (44), a folding spring stopper (45) and a folding spring stop ring (46); the base (1) is provided with a linear slot (14) connected to the inner arc-shaped slide rail (13); the folding slide (41) is slidably mounted on the inner arc-shaped slide rail (13); a folding rod (42) is hinged on the top of the folding slide (41); the folding rod (42) A folding spring stopper (45) is arranged at the top, the telescopic cylinder (43) is slidably mounted on the outside of the folding rod (42), and a folding spring stopper (46) is arranged at the bottom of the telescopic cylinder (43). A folding spring (44) is mounted on the folding rod (42) between the folding spring stopper (45) and the folding spring stopper (46). Under the action of the folding spring (44), the telescopic cylinder (43) and the folding slide seat (41) are clamped together on the upper and lower sides of the inner arc-shaped slide rail (13).

7. The CT-assisted fixator for animals according to claim 6, characterized in that: The base (1) is provided with an inner folding groove (14) which is in communication with the inner arc-shaped slide rail (13); after the folding rod (42) in the sliding folding fixture (4) in the inner arc-shaped slide rail (13) is folded, the telescopic cylinder (43) in the sliding folding fixture (4) is clamped in the inner folding groove (14).

8. The CT-assisted fixator for animals according to claim 6, characterized in that: The front side and / or the rear side of the base (1) is hinged with an extension part (15), an outer arc-shaped slide rail (16) is arranged on the extension part (15), and a sliding folding fixture (4) is slidably mounted inside the outer arc-shaped slide rail (16).

9. The CT-assisted fixator for animals according to claim 8, characterized in that: The base (1) is provided with an outer folding groove (17) connected to the outer arc-shaped slide rail (16); after the folding rod (42) in the sliding folding fixture (4) in the outer arc-shaped slide rail (16) is folded, the telescopic cylinder (43) in the sliding folding fixture (4) is clamped in the outer folding groove (17).

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