Rapid fixing device for rats

Abstract

The utility model discloses a rapid fixing device for rats, which comprises four fixing shafts, baffles, a positioning plate, a head baffle, a tail baffle and a bolt, and the four fixing shafts are distributed in a rectangular shape; through grooves are formed in the four sides of the fixing shaft, the baffles and the positioning plates are installed in the through grooves, and the baffles are located between the positioning plates. The positioning plate penetrates through the through groove of the first fixing shaft, the fixing area of the positioning plate is fixedly connected with the second fixing shaft, the first fixing shaft can slide along the positioning plate, the bolt penetrates through the through hole of the positioning plate to limit the positions of the two fixing shafts and the positioning plate, the remaining fixing shafts are in the same way, and the size of the fixing device is adjusted according to the size of a rat. According to the size of a rat, the distance between the baffles is adjusted, rats of different sizes can be rapidly fixed, operation is convenient, and the rapid fixing requirement of a single person can be met; through the arrangement of the detachable baffle, the contactable part and the contactable area in the fixing process can be changed under the condition that the rat is fixed, the anesthesia requirement for the rat in an animal test is greatly reduced, and the clinical effect is better achieved.

Description

Technical Field

[0001] This utility model relates to experimental animal restraint devices, and more particularly to a rapid restraint device for rats. Background Technology

[0002] In animal experimental teaching and research, it is often necessary to fix rats for dorsal, ventral, thoracic and tail vein injection experiments, as well as some rat experiments that require long-term treatment but cannot be fixed by anesthesia, such as acupuncture, moxibustion, massage, etc. Existing rat fixation devices can be well applied to drug injection, but in acupuncture, moxibustion, etc., the effect is not ideal when it is used in animal stimulation experiments that need to balance high restraint strength, large exposure area and low animal stimulation. The following defects exist: (1) After fixation with a plate-type restraint frame, the rat's head and limbs cannot be moved and the exposure area is large, but the operation is time-consuming and causes great stress to the rat. (2) The window area on the cylindrical cage is limited, the exposure area is small, and the degree of rat fixation is low. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide a rapid restraint device for rats of different sizes that can be quickly and easily fixed by a single person, and whose contact points and contact areas can be adjusted after fixation.

[0004] Technical Solution: The rapid restraint device for rats described in this utility model includes four fixed shafts, several baffles, six positioning plates, a head and tail baffle, and a plug. The four fixed shafts are detachably connected to the head and tail baffles and are arranged in a rectangular pattern. Through slots are formed on all four sides of each fixed shaft, and the baffles and positioning plates are installed within these slots. Both the baffles and positioning plates have limiting protrusions and fixing areas at their ends, with the baffles positioned between the positioning plates. Several through holes are formed on the positioning plates, allowing them to pass through the through slots of the first fixed shaft. The fixing areas of the positioning plates are fixedly connected to the second fixed shaft. The first and second fixed shafts are horizontally positioned on the same plane. The first fixed shaft can slide along the positioning plates. The plug passes through the through holes, limiting the positions of the first and second fixed shafts and the positioning plates. The same applies to the third and fourth fixed shafts. By controlling the distance between the shafts of the four fixed shafts, the size of the restraint device can be adjusted according to the rat's volume to effectively restrain the rat.

[0005] Furthermore, the baffle passes through the slot of the first fixing shaft, and the fixing area of ​​the baffle is detachably connected to the second fixing shaft. When the rat is immobilized, by installing and removing the baffle, the accessible parts and area during the immobilization process can be changed, greatly reducing the need for anesthesia in animal experiments, making the results closer to clinical outcomes, and contributing to the reliability of experimental results. It is suitable for various animal experiments, such as acupuncture, moxibustion, drug injection, intravenous blood collection, and wound photography. After immobilizing the rat, the large operable area and convenient operation can meet the needs of rapid immobilization by a single person.

[0006] Preferably, the fixing area of ​​the baffle is detachably connected to the fixing shaft via Velcro.

[0007] Preferably, the fixed shaft and the head and tail baffles are detachably connected via Velcro. After adjusting the position of the fixed shaft, the head and tail baffles are installed.

[0008] Preferably, the head and tail baffles have V-shaped grooves for placing the rat's tail, which facilitates fixing the rat's tail during tail vein blood collection.

[0009] Furthermore, it also includes a limiting baffle with a through hole, and grooves on both sides of the baffle and the positioning plate to form a variable diameter curved groove. The limiting baffle passes through the variable diameter curved groove to limit the length of the restraining device.

[0010] Preferably, the head shield, positioning board, and head and tail shield of the rat are all made of light-blocking boards to prevent stress in the rat and improve animal welfare.

[0011] Beneficial effects: Compared with the prior art, this utility model has the following advantages: 1. This utility model can quickly fix rats of different sizes by adjusting the distance of the baffle according to the size of the rat, and the operation is convenient and can meet the needs of rapid restraint by a single person; 2. This utility model is equipped with an anti-stress device to improve animal welfare. It has a large operable area. With the detachable baffle, the accessible parts and accessible area during the restraint process can be changed while the rat is fixed, which greatly reduces the need for anesthesia in animal experiments and is closer to clinical results. Attached Figure Description

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is an exploded view of the present invention;

[0014] Figure 3 This is a side view of the present invention;

[0015] Figure 4 This is a schematic diagram of Baoding. Detailed Implementation

[0016] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0017] The rapid restraint device for rats described in this utility model includes a fixed shaft 3, a transparent baffle 6, a light-blocking baffle 8, a light-blocking through-hole positioning plate 7, a transparent through-hole positioning plate 5, a head and tail baffle 1, a limiting baffle 4, and a plug 2. The fixed shaft 3 is rectangular in shape, and its long axis 32 has two mutually perpendicular rectangular slots 31 penetrating its long axis surface for moving and installing the light-blocking through-hole positioning plate 7, the light-blocking baffle 8, the transparent through-hole positioning plate 5, and the transparent baffle 6. The four fixed shafts are arranged in a rectangular pattern, and the short axis surfaces 34 of the four fixed shafts 4 are detachably connected to the head and tail baffle 1 via Velcro.

[0018] The inner surface of the rectangular through groove 31 of the fixed shaft 3 is provided with a hook and loop fastener, which can be connected to the hook and loop fastener rough surfaces 61 and 81 of the light-shielding through hole positioning plate 7, light-shielding baffle 8, transparent through hole positioning plate 5 and transparent baffle 6. The short shaft surface 34 of the fixed shaft 3 is provided with a hook and loop fastener, which can be connected to the rough surface 11 on the head and tail baffle 1. The connection between the rough surface and the hook and loop fastener can be detached.

[0019] Furthermore, the limiting baffle 4 passes through the grooves 62, 82, 52, and 73 on both sides of the long axis of the light-shielding through-hole positioning plate 7, the transparent through-hole baffle, and the light-shielding baffle, thus restricting the rat's body position. The head and tail baffle 1, the limiting baffle 4, the light-shielding through-hole positioning plate 7, the light-shielding baffle 8, the transparent through-hole positioning plate 5, and the transparent baffle 6 are provided with limiting protrusions 51, 63, and 42 at their top ends. The head and tail baffle 1 is provided with a tail-locking groove 12 for fixing the rat's tail during tail vein blood collection.

[0020] Preferably, the fixing areas 54 and 71 of the light-shielding through-hole positioning plate 7 and the transparent through-hole positioning plate 5 are fixed to the fixing shaft connection side 31, and the connection between the fixing area and the fixing shaft is irremovable.

[0021] The transparent through-hole positioning plate 5 and the light-shielding through-hole positioning plate 7 are identical. Taking the light-shielding through-hole positioning plate 7 as an example, the light-shielding through-hole positioning plate 7 passes through the through groove of a fixed shaft. The fixed area of ​​the light-shielding through-hole positioning plate 7 is fixedly connected to another fixed shaft. The other fixed shaft is horizontally set on the same plane. The fixed shaft away from the fixed area of ​​the light-shielding through-hole positioning plate 7 can slide along the light-shielding through-hole positioning plate 7. The plug passes through the through hole, limiting the position of the two fixed shafts and the light-shielding through-hole positioning plate 7. The remaining two fixed shafts are similar. By controlling the distance between the shafts of the four fixed shafts, the size of the restraint device can be adjusted according to the rat's volume to restrain the rat. The plug 2 is connected to the through holes 53, 72, and 41 in the light-shielding through-hole positioning plate 7, the transparent through-hole positioning plate 5, and the limiting baffle 4. After the two are connected, they cannot pass through the fixed shaft 3, which restricts the spatial changes of the restraint device. The size of the restraint device is fixed when the plug passes through the through hole.

[0022] Furthermore, the transparent baffle 6 and the light-blocking baffle 8 are provided with Velcro-like textured surfaces 61 and 81 on the side connected to the fixing shaft 3. After the rat is fixed, the adhesion to the inner surface of the rectangular through groove 31 of the fixing shaft 3 is released, and the transparent baffle 6 and / or the light-blocking baffle 8 can be pulled out to expose different parts of the rat inside.

[0023] After the experiment, the head and tail baffle 1 is provided with two rectangular fur surfaces 11 that are perpendicular to each other and have an angle of 45° with the four sides. After fixing the rat, the rat can be released by releasing the adhesion to the short axis surface 34 of the fixing axis 3.

[0024] Working mechanism:

[0025] like Figure 3-4 As shown, two head and tail baffles 1 and four fixed shafts 3 are interconnected by the rough and spiky surfaces to form a cuboid space for accommodating rats. 28 transparent baffles 6 and 8 light-blocking baffles 8 are interconnected by the rough surfaces and the spiky surfaces of the fixed shafts 3. Four light-blocking through-hole positioning plates 7 and four transparent through-hole positioning plates 5 are fixed to the left and right ends of the rectangular through-slot 31 of the long axis 32 of the fixed shaft. The 44 baffles form the four sides of the cuboid, which together with the two head and tail baffles 1 form a sealed cuboid.

[0026] Rat immobilization: Four immobilization shafts 3 are connected to different parts of two mutually perpendicular rectangular rough surfaces 11 on the head and tail baffles 1, with an included angle of 45° between their four sides. This adjusts the relative distance between the four immobilization shafts 3, thereby causing the baffles to shift and changing the lateral volume of the cuboid, thus restricting the rat's lateral movement and immobilizing it on its side. The limiting baffle 4 can pass through a variable-diameter recessed groove composed of a transparent baffle 6, a light-blocking baffle 8, a light-blocking through-hole positioning plate 7, and a transparent through-hole positioning plate 5, thereby changing the longitudinal volume of the cuboid and restricting the rat's anterior-posterior movement. The plug 2 can pass through through holes 53, 72, and 41 in the light-blocking through-hole positioning plate 7, the transparent through-hole positioning plate 5, and the limiting baffle 4. The plug 2 passes through through holes 53 and 72... The position of 41 limits the maximum opening and closing distance of the fixed axis, thereby allowing for uniform adjustment of the maximum space of the restraint device according to the volume of different batches of rats, improving the restraint speed during the experiment. Eight light-shielding baffles 8 and four light-shielding through-hole positioning plates 7 together form a small light-shielding space, located in the head area of ​​the rat during restraint. The dark environment improves the rat's comfort and reduces the stimulation of the experiment. Twenty-eight transparent baffles 6 and four transparent through-hole positioning plates 5 together form the observation area of ​​the rat's body. The morphology of the rat and the specific position of its limbs in the restraint device can be observed without removing the baffles. In summary, this restraint device can change the size of the restraint space in six directions, facilitates observation, and can reduce the stress level of the rat.

[0027] Experimental procedures: such as Figure 4As shown, open one side of the head and tail baffle 1, place the restraint device near the rat's head, and the rat will enter the restraint device to hide. After the rat enters, insert the limiting baffle 4 to prevent the rat from exiting. For low-stimulation experiments such as moxibustion or wound observation, leave the restraint device in place for 1 minute to allow the rat to adapt to the environment before starting the experiment. For experiments involving painful stimuli such as acupuncture, retract the four fixing shafts 3, connect the head and tail baffles 1, compress the space to completely restrain the rat, determine the experimental operation site through the observation area, and then remove the corresponding baffle to perform the experimental operation.

[0028] Release the rat from restraint: Remove the baffle in front of the rat's head, increase the distance between the four fixing axes, and increase the volume of the restraint device. The rat will then climb out on its own.

Claims

1. A rapid restraint device for rats, characterized in that, The device includes four fixed shafts, several baffles, six positioning plates, head and tail baffles, and a bolt. The four fixed shafts are detachably connected to the head and tail baffles and are arranged in a rectangular pattern. Each fixed shaft has a through groove on its four sides, within which the baffles and positioning plates are installed. Both the baffles and positioning plates have limiting protrusions and fixing areas at their ends, with the baffles positioned between the positioning plates. The positioning plates have several through holes through which they pass through the through groove of the first fixed shaft. The fixing area of ​​the positioning plate is fixedly connected to the second fixed shaft. The first and second fixed shafts are horizontally positioned on the same plane. The first fixed shaft can slide along the positioning plate. The bolt passes through the through holes, limiting the positions of the first and second fixed shafts and the positioning plates. The same applies to the third and fourth fixed shafts, allowing the size of the restraint device to be adjusted according to the rat's volume.

2. The rapid restraint device for rats according to claim 1, characterized in that, The baffle passes through the through groove of the first fixed shaft, and the fixed area of ​​the baffle is detachably connected to the second fixed shaft.

3. The rapid restraint device for rats according to claim 2, characterized in that, The fixing area of ​​the baffle is detachably connected to the fixing shaft via Velcro.

4. The rapid restraint device for rats according to claim 1, characterized in that, The fixed shaft and the head and tail baffles are detachably connected by Velcro.

5. The rapid restraint device for rats according to claim 1, characterized in that, The head and tail baffles have V-shaped grooves for placing the rat's tail.

6. The rapid restraint device for rats according to claim 1, characterized in that, It also includes a limiting baffle with a through hole, and grooves on both sides of the baffle and the positioning plate to form a variable diameter curved groove. The limiting baffle passes through the variable diameter curved groove to limit the length of the restraining device.

7. The rapid restraint device for rats according to claim 1, characterized in that, The head shield, positioning plate, and head and tail shield of the rat were all made of light-blocking plates.

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