Head limiting fixing device for large animal experiment

Abstract

The application provides a head limiting and fixing device for large animal experiments, and relates to the technical field of animal experiment devices, which comprises a workbench and a limiting module, wherein the limiting module is arranged on one side of the workbench; the limiting module comprises two supporting rods, and a limiting assembly for fixing the head of an experimental object is arranged between the two supporting rods; a second adjusting screw is arranged at the bottom of the workbench, and one end of the second adjusting screw is threaded through one side of the supporting rod; through the threaded transmission of the second adjusting screw and the guide rod, one side of the supporting rod can be driven to stably translate as a whole; this design enables the device to easily adapt to the width difference of the heads of different types and sizes of animals, without the need to replace the module, thereby greatly improving the universality; through two-stage displacement adjustment, the positioning block can independently move in multiple degrees of freedom, can be dispersedly positioned and fixed at different regions of the head of an animal, such as the frontal region, the temporal region and the occipital region, and can perfectly adapt to different head shapes and contours.

Description

Technical Field

[0001] This invention relates to the field of animal experimental apparatus technology, and in particular to a head restraint and fixation device for large animal experiments. Background Technology

[0002] In scientific experiments involving large animals (such as neuroelectrophysiology, pharmacological injections, surgical procedures, or imaging scans), stable and reliable head restraint is required to ensure precise manipulation, repeatable data, and the safety of both the animals and personnel. However, existing head restraint devices generally have the following shortcomings: Large laboratory animals of different species and sizes vary greatly in head size, width, and outline. Traditional clamping devices are mostly fixed or can only be adjusted in a limited direction, making it difficult for one device to be suitable for multiple animals. Different clamps are often required for different animals, which increases cost and operational complexity. Conventional fixation methods can only achieve simple "clamping" actions and cannot perform multi-point, multi-dimensional independent positioning of specific areas of the animal's head, such as the frontal bone, zygomatic arch, and mandible. Rigid clamping not only fails to conform to the irregular curved contours of the animal's head, but also easily leads to discomfort and tissue compression due to localized stress concentration, affecting the animal's physiological state.

[0003] Therefore, those skilled in the art have proposed a head restraint device for large animal experiments to solve the problems mentioned above. Summary of the Invention

[0004] To address the technical problem that existing penguin clamping devices have poor applicability and affect experimental results, this invention provides a head-limiting and fixing device for large animal experiments.

[0005] The technical solutions provided by the embodiments of the present invention are as follows: This invention provides a head restraint and fixation device for large animal experiments, comprising: A worktable and a limiting module, wherein the limiting module is disposed on one side of the worktable; The limiting module includes two support rods, and a limiting component for fixing the head of the experimental subject is provided between the two support rods; The bottom of the workbench is provided with a second adjusting screw, one end of which is threaded through one side of the support rod. The bottom of the workbench is provided with guide rods symmetrically distributed with the second adjusting screw, and the guide rods slide through the other side of the support rod. The limiting component includes two connecting discs that are fixedly connected to the opposite sides of the two support rods. One of the connecting discs has two symmetrically distributed sliding grooves on its surface. One side of the connecting disc has a limiting groove that is evenly distributed and communicates with the sliding groove. Two sets of symmetrically distributed connecting plates are provided between the two connecting discs. The connecting plates are arranged in an arc shape.

[0006] In the above technical solution, preferably, one end of the connecting plate is slidably connected to the surface of one of the connecting disks, and the other end of the connecting plate is fixedly connected to a connecting column, the other end of the connecting column passing through the sliding groove and provided with a limiting cylinder.

[0007] In the above technical solution, preferably, the limiting cylinder engages with the inner wall of the limiting groove, the connecting column has a connecting groove inside, the inner wall of the connecting groove is fixedly connected to a first spring, and the other end of the first spring is fixedly connected to the inner wall of the limiting cylinder.

[0008] In the above technical solution, preferably, the surface of the connecting plate is provided with two symmetrically distributed sliding grooves, and the surface of the connecting plate is provided with uniformly distributed limiting holes.

[0009] In the above technical solution, preferably, the surface of the connecting plate is provided with two symmetrically distributed mounting cylinders, the inner wall of the mounting cylinder is slidably connected to a sliding plate, the surface of the sliding plate is fixedly connected to a connecting rod, the other end of the connecting rod passes through the mounting cylinder and the sliding groove and is fixedly connected to a positioning block, and an adjustment cavity is provided between the other side of the sliding plate and the mounting cylinder.

[0010] In the above technical solution, preferably, a fixing ring is fixedly connected to the surface of the mounting cylinder, a sliding ring is slidably connected to the surface of the mounting cylinder, a second spring is fixedly connected between the sliding ring and the fixing ring, and a positioning rod is fixedly connected to the bottom of the sliding ring, the positioning rod matching the limiting hole.

[0011] In the above technical solution, preferably, two symmetrically distributed liquid storage cylinders are fixedly connected to the surface of the connecting plate, an adjusting plate is slidably connected to the inner wall of the liquid storage cylinder, a third spring is fixedly connected between one side of the adjusting plate and the inner wall of the liquid storage cylinder, and hydraulic oil is filled between the other side of the adjusting plate and the inner wall of the liquid storage cylinder.

[0012] In the above technical solution, preferably, a mounting shell is provided on the side of the liquid storage cylinder away from the connecting plate, a sealing block is slidably connected to the inner wall of the mounting shell, a first adjusting screw is provided on one side of the mounting shell, the other end of the first adjusting screw is threaded through the mounting shell and rotatably connected to the surface of the sealing block, and a connecting cavity is formed between the end of the sealing block away from the first adjusting screw and the mounting shell.

[0013] In the above technical solution, preferably, the surface of the liquid storage cylinder is connected to an inlet pipe, and the other end of the inlet pipe is connected to the liquid storage cylinder.

[0014] In the above technical solution, preferably, a connecting pipe is provided between the mounting cylinder and the adjacent mounting shell, one end of the connecting pipe is connected to the adjustment cavity, and the other end of the connecting pipe is connected to the connecting cavity.

[0015] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: Through the threaded transmission between the second adjusting screw and the guide rod, the support rod on one side can be driven to move smoothly. This design allows the device to easily adapt to the width differences of the heads of different types and sizes of animals without the need to replace modules, greatly improving its versatility. The connecting plate can slide along the arc-shaped groove on the connecting plate, thereby changing the azimuth angle of the entire limiting clamping assembly. After it is in place, the limiting cylinder can be inserted into the corresponding limiting groove to achieve quick coarse adjustment and mechanical locking, fixing the posture of the connecting plate. The mounting cylinder, connecting rod, and positioning block constitute an independent clamping unit, which can slide freely along the sliding groove on the connecting plate. By lifting the slip ring, the positioning rod can be disengaged from the limiting hole, and the clamping unit can be moved to the target position. Through two-stage displacement adjustment, the positioning block can move independently in multiple degrees of freedom, enabling decentralized fixed-point limiting of different areas of the animal's head, such as the forehead, temple, and occiput, perfectly adapting to different head shapes and contours.

[0016] When the positioning blocks contact the animal's head, they are met by a reaction force from the head, pushing the connecting rod and sliding plate back into the mounting cylinder. This action compresses the hydraulic oil in the regulating chamber, forcing the oil into the reservoir through the connecting pipe and the inlet pipe. Simultaneously, the third spring in the reservoir is compressed and stores energy. This process allows each positioning block to passively extend and retract according to the actual contour of the contact area, automatically conforming to the curved surface of the head, completely avoiding localized high pressure caused by hard compression. Once all positioning blocks have formed an ideal conformal fit with the head, rotating the first adjusting screw pushes the sealing block to block the connecting chamber, cutting off the oil circuit. Utilizing the incompressibility of the liquid, the positions of all positioning blocks are instantly and rigidly locked, providing a stable and reliable limiting force. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a first-view schematic diagram of a head restraint device for large animal experiments provided in an embodiment of the present invention.

[0019] Figure 2 This is a second-view schematic diagram of a head restraint device for large animal experiments provided in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of a head-limiting and fixing device for large animal experiments provided in an embodiment of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of A in the middle; Figure 5 A partial cross-sectional schematic diagram of a connecting ring for a head-limiting and fixing device for large animal experiments provided in an embodiment of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of B in the middle; Figure 7 This is a schematic diagram showing the connection between the liquid storage cylinder and the mounting cylinder of a head restraint and fixation device for large animal experiments provided in an embodiment of the present invention; Figure 8 For the present invention Figure 7 A magnified view of C.

[0021] Reference numerals: 1. Workbench; 2. Limiting module; 201. Support rod; 202. Connecting plate; 203. Connecting disc; 204. Slide groove; 205. Limiting groove; 206. Positioning block; 207. Connecting rod; 208. Mounting cylinder; 209. Connecting pipe; 210. Connecting column; 211. First spring; 212. Limiting cylinder; 213. Liquid storage cylinder; 214. Sliding groove; 215. Limiting hole; 216. Sliding plate; 217. Slip ring; 218. Second spring; 219. Fixing ring; 220. Adjusting plate; 221. First adjusting screw; 222. Third spring; 223. Mounting shell; 224. Sealing block; 225. Inlet pipe; 3. Second adjusting screw; 31. Guide rod.

[0022] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0023] The technical solutions of the present invention will now be described with reference to the accompanying drawings. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0024] Reference manual attached Figure 1-8 This invention provides a head restraint and fixation device for large animal experiments, comprising: The workbench 1 and the limiting module 2 are provided on one side of the workbench 1; The limiting module 2 includes two support rods 201, and a limiting component for fixing the head of the experimental subject is provided between the two support rods 201. The bottom of the workbench 1 is provided with a second adjusting screw 3, one end of which is threaded through the support rod 201 on one side. The bottom of the workbench 1 is provided with guide rods 31 symmetrically distributed with the second adjusting screw 3, and the guide rods 31 slide through the support rod 201 on the other side. The limiting component includes two connecting discs 203 that are fixedly connected to opposite sides of the two support rods 201. One of the connecting discs 203 has two symmetrically distributed sliding grooves 204 on its surface. One side of the connecting disc 203 has evenly distributed limiting grooves 205 that communicate with the sliding grooves 204. Two sets of symmetrically distributed connecting plates 202 are provided between the two connecting discs 203. The connecting plates 202 are arc-shaped.

[0025] Specifically, the two support rods 201 are integrated into a whole by the limiting component, and the overall position of the limiting component can be adjusted by rotating the second adjusting screw 3 in conjunction with the guide rod 31, so that it can be adapted to the limiting of different experimental animal heads.

[0026] In one possible implementation, one end of the connecting plate 202 is slidably connected to the surface of one of the connecting disks 203, and the other end of the connecting plate 202 is fixedly connected to a connecting post 210. The other end of the connecting post 210 passes through the slide groove 204 and is provided with a limiting cylinder 212.

[0027] The limiting cylinder 212 engages with the inner wall of the limiting groove 205. The connecting column 210 has a connecting groove inside. A first spring 211 is fixedly connected to the inner wall of the connecting groove. The other end of the first spring 211 is fixedly connected to the inner wall of the limiting cylinder 212.

[0028] The surface of the connecting plate 202 is provided with two symmetrically distributed sliding grooves 214, and the surface of the connecting plate 202 is provided with uniformly distributed limiting holes 215.

[0029] The surface of the connecting plate 202 is provided with two symmetrically distributed mounting cylinders 208. The inner wall of the mounting cylinder 208 is slidably connected to a sliding plate 216. The surface of the sliding plate 216 is fixedly connected to a connecting rod 207. The other end of the connecting rod 207 passes through the mounting cylinder 208 and the sliding groove 214 and is fixedly connected to a positioning block 206. An adjustment cavity is provided between the other side of the sliding plate 216 and the mounting cylinder 208.

[0030] A fixing ring 219 is fixedly connected to the surface of the mounting cylinder 208, and a sliding ring 217 is slidably connected to the surface of the mounting cylinder 208. A second spring 218 is fixedly connected between the sliding ring 217 and the fixing ring 219. A positioning rod is fixedly connected to the bottom of the sliding ring 217, and the positioning rod matches the limiting hole 215.

[0031] Specifically, the connecting plate 202 can slide along the slide groove 204 via the connecting post 210. During the insertion of the limiting cylinder 212 into the inner wall of the limiting groove 205, the position of the connecting post 210 is limited, thus fixing the position of the connecting plate 202. Adjusting the connecting plate 202 according to the animal's head position changes the positions of the positioning block 206, connecting rod 207, and mounting cylinder 208. The positioning block 206 is used to press against the animal's head, thus limiting its position. The insertion of the positioning rod into the limiting hole 215 further limits the positioning block 206, connecting rod 207, and mounting cylinder 208. This is achieved by moving the sliding ring upwards. 217 can compress the second spring 218 and simultaneously cause the positioning rod to separate from the limiting hole 215. At this time, the positions of the mounting cylinder 208, connecting rod 207 and positioning block 206 can be adjusted to adapt to the limiting effect of different animal heads. After adjustment, the slip ring 217 can be reset by releasing the slip ring 217, which will be driven by the second spring 218. Thus, the positioning rod can be re-inserted into the adjacent limiting hole 215, thereby limiting the positioning block 206, connecting rod 207 and mounting cylinder 208. With the adjustment of the connecting plate 202, a larger adjustment range can be improved, thereby achieving the limiting effect of more animal heads.

[0032] In one possible implementation, two symmetrically distributed liquid storage cylinders 213 are fixedly connected to the surface of the connecting plate 202. An adjusting plate 220 is slidably connected to the inner wall of the liquid storage cylinder 213. A third spring 222 is fixedly connected between one side of the adjusting plate 220 and the inner wall of the liquid storage cylinder 213. Hydraulic oil is filled between the other side of the adjusting plate 220 and the inner wall of the liquid storage cylinder 213.

[0033] In the above technical solution, preferably, a mounting shell 223 is provided on the side of the liquid storage cylinder 213 away from the connecting plate 202, a sealing block 224 is slidably connected to the inner wall of the mounting shell 223, a first adjusting screw 221 is provided on one side of the mounting shell 223, the other end of the first adjusting screw 221 is threaded through the mounting shell 223 and rotatably connected to the surface of the sealing block 224, and a connecting cavity is formed between the end of the sealing block 224 away from the first adjusting screw 221 and the mounting shell 223.

[0034] The surface of the liquid storage cylinder 213 is connected to an inlet pipe 225, and the other end of the inlet pipe 225 is connected to the liquid storage cylinder 213.

[0035] A connecting pipe 209 is provided between the mounting cylinder 208 and the adjacent mounting shell 223. One end of the connecting pipe 209 is connected to the adjustment cavity, and the other end of the connecting pipe 209 is connected to the connecting cavity.

[0036] Specifically, as the adjustment proceeds, the positioning block 206 can be squeezed and moved by the animal's head during the process of contacting the animal's head. During this process, the connecting column 210 can be driven to gradually slide into the interior of the mounting cylinder 208, and at the same time, the sliding plate 216 can be driven to slide along the interior of the mounting cylinder 208. This squeezes the hydraulic oil that was introduced into the connecting cavity by the third spring 222 and the adjusting plate 220 and returned to the interior of the reservoir cavity. Due to the action of the third spring 222, the positioning block 206 can be adjusted according to the changes in the contour of the animal's head to adapt to different animal heads. After adjusting to the required fixed position, rotating the first adjusting screw 221 causes the sealing block 224 to block the connecting cavity, preventing hydraulic oil from flowing through the connecting cavity and the inlet pipe 225, thereby ensuring the position of the positioning block 206 and thus ensuring a good limiting effect.

[0037] In summary, this invention relates to a head restraint and fixation device for large animal experiments. The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: In this invention, the precise thread transmission between the second adjusting screw and the guide rod drives the entire support rod to move smoothly. This design allows the device to easily adapt to the width differences of the heads of different types and sizes of animals without the need to replace modules, greatly improving its versatility. The connecting plate can slide along the arc-shaped groove on the connecting plate, thereby changing the azimuth angle of the entire limiting clamping assembly. After it is in place, the limiting cylinder is inserted into the corresponding limiting groove to achieve quick coarse adjustment and mechanical locking, fixing the posture of the connecting plate. The mounting cylinder, connecting rod, and positioning block constitute an independent clamping unit that can slide freely along the sliding groove on the connecting plate. By lifting the sliding ring, the positioning rod is disengaged from the limiting hole, and the clamping unit can be moved to the target position. Through two-stage displacement adjustment, the positioning block can move independently in multiple degrees of freedom, enabling decentralized fixed-point limiting of different areas of the animal's head, such as the forehead, temple, and occiput, perfectly adapting to different head shapes and contours.

[0038] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A head restraint and fixation device for large animal experiments, characterized in that, include: A workbench (1) and a limiting module (2), wherein the limiting module (2) is disposed on one side of the workbench (1); The limiting module (2) includes two support rods (201), and a limiting component for fixing the head of the experimental subject is provided between the two support rods (201); The bottom of the workbench (1) is provided with a second adjusting screw (3), one end of which is threaded through the support rod (201) on one side. The bottom of the workbench (1) is provided with guide rods (31) symmetrically distributed with the second adjusting screw (3), and the guide rods (31) slide through the support rod (201) on the other side. The limiting component includes two connecting discs (203) that are fixedly connected to opposite sides of the two support rods (201). One of the connecting discs (203) has two symmetrically distributed sliding grooves (204) on its surface. One side of the connecting disc (203) has a uniformly distributed limiting groove (205) that communicates with the sliding groove (204). Two sets of symmetrically distributed connecting plates (202) are provided between the two connecting discs (203). The connecting plates (202) are arc-shaped.

2. The head restraint and fixation device for large animal experiments according to claim 1, characterized in that, One end of the connecting plate (202) is slidably connected to the surface of one of the connecting discs (203), and the other end of the connecting plate (202) is fixedly connected to a connecting column (210). The other end of the connecting column (210) passes through the slide groove (204) and is provided with a limit cylinder (212).

3. The head-limiting and fixing device for large animal experiments according to claim 2, characterized in that, The limiting cylinder (212) engages with the inner wall of the limiting groove (205), and the connecting column (210) has a connecting groove inside. The inner wall of the connecting groove is fixedly connected to a first spring (211), and the other end of the first spring (211) is fixedly connected to the inner wall of the limiting cylinder (212).

4. The head-limiting and fixing device for large animal experiments according to claim 3, characterized in that, The surface of the connecting plate (202) is provided with two symmetrically distributed sliding grooves (214), and the surface of the connecting plate (202) is provided with uniformly distributed limiting holes (215).

5. The head-limiting and fixing device for large animal experiments according to claim 4, characterized in that, The surface of the connecting plate (202) is provided with two symmetrically distributed mounting cylinders (208). The inner wall of the mounting cylinder (208) is slidably connected to a sliding plate (216). The surface of the sliding plate (216) is fixedly connected to a connecting rod (207). The other end of the connecting rod (207) passes through the mounting cylinder (208) and the sliding groove (214) and is fixedly connected to a positioning block (206). An adjustment cavity is provided between the other side of the sliding plate (216) and the mounting cylinder (208).

6. The head-limiting and fixing device for large animal experiments according to claim 5, characterized in that, A fixing ring (219) is fixedly connected to the surface of the mounting cylinder (208), and a sliding ring (217) is slidably connected to the surface of the mounting cylinder (208). A second spring (218) is fixedly connected between the sliding ring (217) and the fixing ring (219). A positioning rod is fixedly connected to the bottom of the sliding ring (217), and the positioning rod matches the limiting hole (215).

7. The head-limiting and fixing device for large animal experiments according to claim 6, characterized in that, Two symmetrically distributed liquid storage cylinders (213) are fixedly connected to the surface of the connecting plate (202). An adjusting plate (220) is slidably connected to the inner wall of the liquid storage cylinder (213). A third spring (222) is fixedly connected between one side of the adjusting plate (220) and the inner wall of the liquid storage cylinder (213). Hydraulic oil is filled between the other side of the adjusting plate (220) and the inner wall of the liquid storage cylinder (213).

8. The head-limiting and fixing device for large animal experiments according to claim 7, characterized in that, The liquid storage cylinder (213) is provided with a mounting shell (223) on the side away from the connecting plate (202). A sealing block (224) is slidably connected to the inner wall of the mounting shell (223). A first adjusting screw (221) is provided on one side of the mounting shell (223). The other end of the first adjusting screw (221) is threaded through the mounting shell (223) and rotatably connected to the surface of the sealing block (224). A connecting cavity is formed between the end of the sealing block (224) away from the first adjusting screw (221) and the mounting shell (223).

9. The head-limiting and fixing device for large animal experiments according to claim 8, characterized in that, The surface of the liquid storage cylinder (213) is connected to an inlet pipe (225), and the other end of the inlet pipe (225) is connected to the liquid storage cylinder (213).

10. The head-limiting and fixing device for large animal experiments according to claim 9, characterized in that, A connecting pipe (209) is provided between the mounting cylinder (208) and the adjacent mounting shell (223). One end of the connecting pipe (209) is connected to the adjustment cavity, and the other end of the connecting pipe (209) is connected to the connecting cavity.

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