Adjustable rat fixer for experiment
By designing an adjustable rat fixator, the problems of instability and inconvenience of fixation in traditional rats are solved, stable fixation of rats and convenience of multiple experimental operations are achieved, the damage to rats is reduced, and the reliability of the experiment is improved.
Patent Information
- Application Number
- CN202421644333.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The traditional rat fixation method is unstable and inconvenient, which affects the accuracy and repetition of the experiment. Moreover, the rats are difficult to fix due to repeated operations, resulting in the inability to conduct the experiment.
An adjustable rat fixer including a head fixer and a fixing cylinder is designed. The head fixer is a cylinder with a gap in the middle, with a sponge buffer pad inside, and an anti-depression sheet and an adjustment nut in the fixing cylinder. The angle and position can be adjusted with the support frame to adapt to rats of different lengths.
The stable fixation of rats is achieved, the difficulty of operation is reduced, the damage to rats is reduced, the reliability and safety of the experiment are improved, and the application is adapted to a variety of experimental operation needs.
Smart Images
Figure CN223111842U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of animal experiment equipment, and particularly relates to an adjustable rat fixator for experiments, which is applicable to pharmacological, physiological, and toxicological experiments to fix rats and conduct research and teaching on drugs. Background Art
[0002] In the research fields of biology, medicine, etc., rats are often widely used as experimental animals. In various experiments and teaching such as rat tail vein injection, rat blood collection from veins, rat tail tenderness, hot tail pain or electroacupuncture pain experiments, rat toe swelling anti-inflammatory experiments, and fixing rats in a conscious state, a rat fixing device is required. However, there are many problems with traditional rat fixing methods, such as unstable fixation and inconvenient operation. These problems not only affect the accuracy and repeatability of experiments but also bring great inconvenience to the operation of experimenters. At the same time, the original methods of fixing rats mostly utilize the drilling habit of rats, allowing rats to drill into a cylindrical fixator by themselves. After fixing the rat's buttocks, experimental operations are carried out. In actual processes, rats often do not actively drill into the fixing cylinder due to reasons such as repeated operations, memory formation, fear, drug effects, etc., making the experiment impossible to proceed. Therefore, how to provide a convenient and stable rat fixator is the key to solving existing problems. Content of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide an adjustable rat fixator for experiments, which has a simple structure, strong practicability, convenient operation, no harm to rats, and can be adjusted according to the different lengths of rats, making it more convenient to fix rats.
[0004] The adjustable rat fixator for experiments described in the utility model includes a head fixator and a fixing cylinder. The head fixator is a cylinder with a conical vacancy in the middle. The conical vacancy is thinner at the front and thicker at the back. A breathing hole is connected to the front end of the conical vacancy, which can assist the rat in the fixing cylinder to breathe. A circular sponge buffer pad is provided on the inner wall of the head fixator to fit the rat's face. The head fixator is slidably sleeved in the fixing cylinder. A fixing nut is provided on the fixing cylinder corresponding to the head fixator. The fixing nut passes through the fixing cylinder through a fixing hole and is threadedly connected to the fixing cylinder. An oval injection hole is provided at the bottom of the fixing cylinder for abdominal drug administration. A fixing slot is provided at the lower part of the rear end of the fixing cylinder for fixing the rat's lower limbs, facilitating various experimental operations on the rat's lower limb parts. An anti-detachment pressing piece is provided on the inner wall of the rear end of the fixing cylinder. The anti-detachment pressing piece is an elastic sheet material. One end of the anti-detachment pressing piece is connected to the inner wall of the fixing cylinder, and the other end of the anti-detachment pressing piece corresponds to an adjusting nut provided on the fixing cylinder.
[0005] Preferably, both the head fixator and the fixing cylinder are made of transparent materials for easy observation of the rat's state.
[0006] Preferably, a plurality of fixing holes are provided along the length direction of the fixing cylinder, and the plurality of fixing holes are communicated through fixing chutes, which is more convenient for adjusting the contact position between the fixing nut and the head fixator.
[0007] Preferably, an adjustable clamp is sleeved on the front end of the fixing cylinder, which can reinforce the head fixator secondly, enhance the stability of the head fixator, and effectively prevent the fixing nut from slipping and causing the sliding of the head fixator.
[0008] Preferably, it further includes a support frame, and the outer wall of the fixing cylinder is detachably connected to the support frame.
[0009] Preferably, the support frame includes a base, a bracket is provided on the base, a bridge is provided horizontally on the bracket, and the fixing cylinder is tenoned on the bridge through a conical base provided at the bottom.
[0010] Preferably, the cross-section of the conical base is a trapezoid with an arc-shaped top side, the conical base extends along the length direction of the fixing cylinder, and a groove is provided on the bridge, and the groove fits with the conical base. Multiple grooves can be provided on the bridge, and multiple fixing cylinders can be installed to fix multiple rats simultaneously.
[0011] Preferably, there are two brackets, which are respectively arranged on both sides of the bridge. Positioning chutes are provided longitudinally on the brackets, positioning nuts are provided in the positioning chutes, and the positioning nuts pass through the positioning chutes and are threadedly connected to both ends of the bridge.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0013] 1. The utility model has a simple structure, ingenious design, convenient operation, low cost, and is safe and reliable;
[0014] 2. A conical vacancy is provided in the head fixator, and the conical vacancy gradually expands from front to back to adapt to the shape of the rat's head, and breathing holes are provided for the rat to breathe; the sliding fit between the head fixator and the fixing cylinder is convenient for the telescopic adjustment of the head fixator to cooperate with rats of different lengths, and then it is fixed with a fixing nut; a circular sponge buffer pad is added to the cylinder in the head fixator, which effectively reduces the secondary injury caused by the extrusion or collision of the rat's face due to head fixation;
[0015] 3. An anti-detachment pressing piece is arranged in the fixing cylinder, which cooperates with the adjusting nut. Rotate the adjusting nut to press down the anti-detachment pressing piece, so that the anti-detachment pressing piece presses the rat's buttocks for fixation, and the root of the rat's tail can be fixed from here, which is convenient for tail operations such as rat tail vein puncture, blood collection and drug administration;
[0016] 4. The bridge and the brackets on both sides are connected by positioning nuts, and the fixing cylinder can be freely adjusted at multiple angles according to the needs of the experimenter, which is convenient for various experimental operations;
[0017] 5. When the rat is placed in a fixed cylinder, it is convenient for operations such as intraperitoneal injection, tail vein blood sampling, and ankle joint inflammation measurement, effectively avoiding injuries to experimental personnel caused by mistakes in manual operations. Brief Description of the Drawings
[0018] Figure 1 is a schematic diagram of the overall structure of the adjustable rat fixator for experiments of the present utility model;
[0019] Figure 2 is a schematic diagram of the overall structure of the fixed cylinder;
[0020] Figure 3 is a schematic diagram of the bottom view structure of the fixed cylinder;
[0021] Figure 4 is a schematic diagram of the internal structure of the fixed cylinder;
[0022] Figure 5 is a schematic diagram of the front view structure of the head fixator;
[0023] Figure 6 is a schematic diagram of the rear view structure of the head fixator;
[0024] Figure 7 is a schematic diagram of the internal structure of the head fixator;
[0025] Figure 8 is a schematic diagram of the front view structure of the support frame;
[0026] In the figure: 1. Head fixator; 2. Fixed cylinder; 3. Respiration hole; 4. Sponge buffer pad; 5. Fixed nut; 6. Fixed hole; 7. Injection hole; 8. Fixed card slot; 9. Anti - detachment pressure piece; 10. Adjusting nut; 11. Fixed sliding groove; 12. Adjustable clamp; 13. Base; 14. Support; 15. Bridge; 16. Groove; 17. Vertebral base; 18. Positioning sliding groove; 19. Positioning nut. Detailed Embodiments
[0027] The present utility model will be clearly and completely described below in conjunction with the drawings.
[0028] Embodiment 1
[0029] As Figure 1 , Figure 5 , Figure 6 , Figure 7As shown in the figure, the adjustable rat fixator for experiments includes a head fixator 1 and a fixing cylinder 2. The head fixator 1 is a cylinder with a conical vacancy in the middle. The conical vacancy is thinner at the front and thicker at the back. A breathing hole 3 is connected to the front end of the conical vacancy, which can assist the rat in the fixing cylinder 2 to breathe. A circular sponge buffer pad 4 is provided on the inner wall of the head fixator 1 to fit the rat's face. The head fixator 1 is slidably sleeved in the fixing cylinder 2. A fixing nut 5 is provided on the fixing cylinder 2 corresponding to the head fixator 1. The fixing nut 5 passes through the fixing cylinder 2 through a fixing hole 6 and is threadedly connected to the fixing cylinder 2. An oval injection hole 7 is provided at the bottom of the fixing cylinder 2 for abdominal drug administration. A fixing slot 8 is provided at the lower part of the rear end of the fixing cylinder 2 for fixing the rat's lower limbs, facilitating various experimental operations on the rat's lower limb parts, such as Figure 2 , Figure 3 , Figure 4 As shown in the figure, an anti-slip pressing piece 9 is provided on the inner wall of the rear end of the fixing cylinder 2. The anti-slip pressing piece 9 is an elastic sheet material. One end of the anti-slip pressing piece 9 is connected to the inner wall of the fixing cylinder 2, and the other end of the anti-slip pressing piece 9 corresponds to an adjusting nut 10 provided on the fixing cylinder 2.
[0030] Both the head fixator 1 and the fixing cylinder 2 are made of transparent materials for easy observation of the rat's state.
[0031] A plurality of fixing holes 6 are provided along the length direction of the fixing cylinder 2, and the plurality of fixing holes 6 are connected through a fixing chute 11.
[0032] Such as Figures 2 - 4 As shown in the figure, an adjustable clamp 12 is sleeved on the front end of the fixing cylinder 2, which can reinforce the head fixator 1 secondarily and effectively prevent the head fixator 1 from sliding due to the fixing nut 5 slipping.
[0033] The working process is as follows: Adjust the position of the head fixator 1 in the fixing cylinder 2 according to the rat's body length. Tighten the fixing nut 5 along the fixing hole 6 so that the fixing nut 5 presses against the outer wall of the head fixator 1. Then lock the adjustable clamp 12. Push the rat headfirst into the fixing cylinder 2 so that the rat's head is placed in the head fixator 1 and the face is padded on the sponge buffer pad 4. Clamp the rat's lower limbs in the fixing slot 8. Rotate the adjusting nut 10 to press down the anti-slip pressing piece 9 to fix the rat's buttocks. At this time, the rat's abdomen can be operated through the injection hole 7.
[0034] Example 2
[0035] On the basis of Example 1, as Figure 8 shown in the figure, it further includes a support frame, and the outer wall of the fixing cylinder 2 is detachably connected to the support frame.
[0036] The support frame includes a base 13. A bracket 14 is provided on the base 13. A bridge 15 is horizontally provided on the bracket 14. The fixing cylinder 2 is tenoned on the bridge 15 through a conical base 17 provided at the bottom.
[0037] There are two brackets 14, which are respectively arranged on both sides of the bridge frame 15. A positioning chute 18 is longitudinally provided on the bracket 14, and a positioning nut 19 is arranged in the positioning chute 18. The positioning nut 19 passes through the positioning chute 18 and is threadedly connected to both ends of the bridge frame 15.
[0038] The cross-section of the vertebral body base 17 is a trapezoid with an arc-shaped top side. The vertebral body base 17 extends along the length direction of the fixed cylinder 2. A groove 16 is provided on the bridge frame 15, and the groove 16 fits with the vertebral body base 17.
[0039] The working process is as follows: Push the vertebral body base 17 along the groove 16 to fix the fixed cylinder 2 on the bridge frame 15. Loosen the positioning nut 19 to adjust the height and angle of the bridge frame 15, and then tighten the positioning nut 19 to clamp the bridge frame 15 on the bracket 14 for operation.
Claims
1. An adjustable rat fixator for experiments, characterized in that, It includes a head fixator (1) and a fixing cylinder (2). The head fixator (1) is a cylinder with a conical vacancy in the middle. The conical vacancy is thinner at the front and thicker at the back. A breathing hole (3) is connected to the front end of the conical vacancy. An annular sponge cushion (4) is provided on the inner wall of the head fixator (1). The head fixator (1) is slidably sleeved in the fixing cylinder (2). A fixing nut (5) corresponding to the head fixator (1) is provided on the fixing cylinder (2). The fixing nut (5) passes through the fixing cylinder (2) through a fixing hole (6) and is threadedly connected to the fixing cylinder (2). An oval injection hole (7) is provided at the bottom of the fixing cylinder (2). A fixing slot (8) is provided at the lower part of the rear end of the fixing cylinder (2). An anti - detachment pressing piece (9) is provided on the inner wall of the rear end of the fixing cylinder (2). The anti - detachment pressing piece (9) is an elastic sheet material. One end of the anti - detachment pressing piece (9) is connected to the inner wall of the fixing cylinder (2), and the other end of the anti - detachment pressing piece (9) corresponds to an adjusting nut (10) provided on the fixing cylinder (2).
2. The adjustable rat fixator for experiments according to claim 1, characterized in that, Both the head fixator (1) and the fixing cylinder (2) are made of transparent materials.
3. The adjustable rat fixator for experiments according to claim 1, wherein, A plurality of fixing holes (6) are provided along the length direction of the fixing cylinder (2), and the plurality of fixing holes (6) are communicated through fixing chutes (11).
4. The adjustable rat fixator for experiments according to claim 3, wherein An adjustable clamp (12) is sleeved on the front end of the fixing cylinder (2).
5. The adjustable rat fixator for experimental use according to claim 1, wherein It further includes a support frame, and the outer wall of the fixing cylinder (2) is detachably connected to the support frame.
6. The adjustable rat fixator for experiments according to claim 5, characterized in that, The support frame includes a base (13). A bracket (14) is provided on the base (13). A bridge (15) is horizontally provided on the bracket (14). The fixing cylinder (2) is tenoned on the bridge (15) through a conical base (17) provided at the bottom.
7. The adjustable rat fixator for experiments according to claim 6, characterized in that, The cross - section of the conical base (17) is a trapezoid with an arc - shaped top side. The conical base (17) extends along the length direction of the fixing cylinder (2). A groove (16) is provided on the bridge (15), and the groove (16) fits with the conical base (17).
8. The adjustable rat fixator for experiments according to claim 6, characterized in that, There are two brackets (14), which are respectively arranged on both sides of the bridge (15). Positioning chutes (18) are longitudinally provided on the brackets (14). Positioning nuts (19) are provided in the positioning chutes (18), and the positioning nuts (19) pass through the positioning chutes (18) and are threadedly connected to both ends of the bridge (15).