Fixing device for hypodermic injection of laboratory mouse

Abstract

A laboratory mouse subcutaneous injection fixing device comprises a workbench, a fixed housing, a positioning support rod, a movable plate, a positioning lock sleeve, a threaded support rod and a fastening retaining ring, an injection opening is formed in the upper portion of the fixed housing, a bearing plate is arranged on the lower portion of the fixed housing, a plurality of supporting legs are connected to the lower portion of the bearing plate, the supporting legs are connected with balancing weights, and a limiting baffle is arranged on the upper portion of the bearing plate. The limiting baffle is connected with the workbench, the lower portion of the workbench is connected with the bearing plate, the bearing plate is provided with sliding blocks, the two sides of the workbench are provided with sliding ways, the sliding blocks are matched with the sliding ways, the sliding blocks are connected with the sliding ways, the sliding blocks slide on the sliding ways, the sliding ways are provided with sliding grooves, the sliding grooves are matched with the rollers, the rollers are connected with the sliding grooves, and the rollers slide on the sliding grooves and are connected with the sliding blocks through shaft rods. The shaft rod is sequentially connected with the sliding block and the roller.

Description

Technical Field

[0001] The utility model relates to the field of animal experiments, in particular to a subcutaneous injection fixing device for experimental mice. Background Art

[0002] The existing patent (Announcement No.: CN216962724U) proposes a subcutaneous injection fixation device for experimental mice, including a cubic box body, a piston push plate, the front end of the box body is an open end, the top surface of the box body is provided with an opening along the length direction, the center of the piston push plate is provided with a nose groove, the area of ​​the piston push plate matches the front end of the cubic box body, and the piston push plate moves in the cubic box body. The cubic box body is composed of a buckle cover and a bottom plate, and the bottom plate includes the same double-layer plate 1, double-layer plate 2 and a telescopic plate. One end of the telescopic plate is fixedly connected to the inner interlayer of the double-layer plate 1, and the other end is provided with a downward convex block. The interlayer of the double-layer plate 2 is provided with an I-shaped slide groove, which cooperates with the convex block of the telescopic plate. A large buckle cover and a small buckle cover are provided corresponding to the telescopic size of the bottom plate, and a large piston and a small piston matching the front end of the box body are provided. However, in this device, "the mouse's head is inserted from the top of the fixing box with a piston push plate with a nose groove until it cannot be pushed anymore, so as to firmly fix the mouse. The experimenter pulls up the skin on the back of the experimental mouse from the opening on the top of the buckle cover to accurately and quickly inject the drug subcutaneously for the experiment." When the piston plate drives the mouse's head to move, it cannot ensure that the mouse's back remains straight. During the injection operation, the injection position may be offset or the insertion depth may be incorrectly operated due to the curling of the mouse's back, causing damage to the internal organs of the experimental mouse or even death. This has disadvantages. Summary of the invention

[0003] The utility model aims at the above-mentioned deficiencies in the prior art and provides a device that is convenient for placing and pushing experimental mice, improves the subcutaneous injection efficiency of experimental mice, and wraps and fixes the front and rear limbs and body of the experimental mice to avoid scratching and biting by the experimental mice, protects the safety of experimental personnel, and keeps the mouse's back straight to avoid the experimental mice from struggling violently or curling their backs, which may lead to injection site deviation or insertion depth operation errors. The injection port is opened to facilitate the experimental personnel to grasp the injection position and improve the injection effect. The insertion distance between the front and rear legs of the mouse can be adjusted accordingly according to the actual body length of the experimental mouse. The utility model provides a subcutaneous injection fixing device for experimental mice with a wide range of applications, flexible structure, and convenient operation.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A subcutaneous injection fixing device for experimental mice comprises a workbench, a fixed cover shell, a positioning support rod, a movable plate, a positioning locking sleeve, a threaded support rod, and a fastening buckle. The upper portion of the fixed cover shell is provided with an injection port, the lower portion of the fixed cover shell is provided with a supporting plate, the lower portion of the supporting plate is connected to a plurality of supporting legs, the supporting legs are connected to a counterweight, the upper portion of the supporting plate is provided with a limit baffle, the limit baffle is connected to the workbench, the lower portion of the workbench is connected to the supporting plate, the supporting plate has a slider, both sides of the workbench are provided with slideways, the slider is adapted to the slideway, the slider is connected to the slideway, the slider slides on the slideway, the slideway has a slide groove, the slide groove is adapted to a roller, the roller is connected to the slide groove, the roller slides on the slide groove, the roller is connected to the slider through a shaft rod, and the shaft rod is sequentially connected to the slider and the roller.

[0006] The utility model provides rear leg insertion holes on both sides of the workbench, the workbench has movable through holes, the movable through holes are adapted to the movable plate, the movable plate is connected to the movable through holes, the positioning support rod is sequentially connected to the workbench and the movable plate, the positioning support rod is connected to the movable plate through a thread, one end of the positioning support rod is provided with a limiting circular plate, the limiting circular plate fits the workbench, the other end of the positioning support rod is connected to an adjusting knob, and the adjusting knob fits the workbench. Beneficial Effects

[0007] During the injection operation of the utility model, the workbench is first pulled toward the outside of the fixed cover shell, and then the experimental mouse is placed on the upper part of the workbench, and the front and hind legs of the experimental mouse are respectively placed in the front leg insertion holes and the hind leg insertion holes, the mouse abdomen is pressed against the workbench, and the mouse back is kept in a straight state, and then the workbench carrying the experimental mouse is pushed toward the inside of the fixed cover shell until the workbench fits with the inner surface of the limit baffle, and the positioning lock sleeve is driven to move by rotating the control knob until it is embedded in the positioning lock groove, so as to position and support the workbench, and the fixed cover shell wraps and fixes the body of the experimental mouse to prevent the experimental mouse from scratching and biting, protect the safety of the experimenter, and prevent the experimental mouse from struggling violently, resulting in the displacement of the injection site or the error of the insertion depth operation, and the back of the experimental mouse placed in the fixed cover shell corresponds to the position of the injection port, at this time, the experimenter can perform subcutaneous injection on the experimental mouse through the injection port, which is convenient for the experimenter to grasp the injection position and improve the injection effect.

[0008] The positioning support rod of the utility model is connected with the movable plate through a thread, so that when the positioning support rod is driven to rotate by turning the adjusting knob, the movable plate performs a transverse linear displacement movement in the movable through hole, so that the insertion distance between the front and rear legs of the mouse can be adjusted accordingly according to the actual body length of the experimental mouse, thereby improving the scope of application and having a flexible structure.

[0009] The workbench and the supporting plate of the utility model are connected by a detachable pull-out connection, which is convenient for pushing the experimental mice. The workbench and the supporting plate are easy to disassemble and assemble. The workbench can be removed separately for disinfection. A counterweight block is added to the lower part of the supporting leg to increase the weight of the bottom of the fixed cover shell, improve the overall stability of the device, and prevent the device from being affected by the force exerted by the experimental mice when struggling, causing shaking or even overturning.

[0010] The utility model is convenient for placing and pushing experimental mice, improves the subcutaneous injection efficiency of experimental mice, and wraps and fixes the front and rear limbs and body of the experimental mice to avoid being scratched and bitten by the experimental mice, protects the safety of experimental personnel, and keeps the mouse's back in a straight state, avoids the experimental mice from struggling violently or curling their backs, etc., which may lead to injection site deviation or insertion depth operation errors. The injection port is provided to facilitate the experimental personnel to grasp the injection position and improve the injection effect. The insertion distance between the front and rear legs of the mouse can be adjusted accordingly according to the actual body length of the experimental mouse. The utility model has a wide range of applications, a flexible structure, and is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a schematic diagram of the structure of a subcutaneous injection fixation device for experimental mice.

[0012] Figure 2 The utility model is a cross-sectional view of the structure of a subcutaneous injection fixation device for experimental mice.

[0013] Figure 3 It is a cross-sectional view of the connection structure of the workbench and the supporting plate described in the utility model.

[0014] Figure 4 The utility model is a side sectional view of the structure of a subcutaneous injection fixation device for experimental mice.

[0015] Figure 5 This is a cross-sectional view of the workbench positioning structure described in the utility model.

[0016] Figure 6 This is a cross-sectional view of the threaded support rod limiting structure described in the utility model.

[0017] Figure 7 This is a schematic diagram of the workbench and movable plate structure of the utility model.

[0018] Figure 8 This is a schematic diagram of the fixed cover structure described in the utility model.

[0019] Fig. 9 It is an exploded view of the positioning lock sleeve control structure described in the utility model. Implementation

[0020] The utility model is further described in detail below according to the accompanying drawings and embodiments:

[0021] Embodiment 1:

[0022] A subcutaneous injection fixing device for experimental mice, comprising a workbench 02, a fixed cover 04, a positioning support rod 09, a movable plate 13, a positioning locking sleeve 21, a threaded support rod 22, and a fastening buckle 25. The upper portion of the fixed cover 04 has an injection port 05, the lower portion of the fixed cover 04 has a supporting plate 06, the lower portion of the supporting plate 06 is connected to a plurality of supporting legs 01, the supporting legs 01 are connected to a counterweight block 03, the upper portion of the supporting plate 06 has a limit baffle 08, the limit baffle 08 is connected to the workbench 02, the lower portion of the workbench 02 is connected to the supporting plate 06, the supporting plate 06 has a slider 15, both sides of the workbench 02 have slideways 16, the slider 15 is adapted to the slideway 16, the slider 15 is connected to the slideway 16, the slider 15 Slide on the slide 16, the slide 16 has a slide groove 17, the slide groove 17 is adapted to the roller 18, the roller 18 is connected to the slide groove 17, the roller 18 slides on the slide groove 17, the roller 18 is connected to the slider 15 through the shaft 19, the shaft 19 is connected to the slider 15 and the roller 18 in sequence, the workbench 02 and the supporting plate 06 are connected by a separable pull-out connection, which is convenient for pushing the experimental mouse, and the workbench 02 and the supporting plate 06 are easy to disassemble and assemble, the workbench 02 can be removed separately for disinfection, and a counterweight block 03 is added to the lower part of the supporting leg 01 to increase the weight of the bottom of the fixed cover shell 04, improve the overall stability of the device, and prevent the device from being affected by the force exerted by the experimental mouse when struggling, causing shaking or even overturning.

[0023] Embodiment 2:

[0024] The utility model provides hind leg insertion holes 11 on both sides of the workbench 02, the workbench 02 has a movable through hole 14, the movable through hole 14 is adapted to the movable plate 13, the movable plate 13 is connected to the movable through hole 14, the positioning support rod 09 is connected to the workbench 02 and the movable plate 13 in sequence, the positioning support rod 09 is connected to the movable plate 13 by a thread, one end of the positioning support rod 09 has a limiting circular plate 07, the limiting circular plate 07 fits the workbench 02, the other end of the positioning support rod 09 is connected to the adjusting knob 10, the adjusting knob 10 fits the workbench 02, the positioning support rod 09 is positioned and connected to the movable plate 13 by a thread, so that when the positioning support rod 09 is driven to rotate by rotating the adjusting knob 10, the movable plate 13 performs a lateral linear displacement movement in the movable through hole 14, so that the insertion distance between the front and rear legs of the mouse can be adjusted accordingly according to the actual body length of the experimental mouse, thereby improving its scope of application and having a flexible structure.

[0025] Embodiment 3:

[0026] The utility model discloses a fixing cover 04 with a fastening sleeve 24 on the outside, a fixing cover 04 with a workbench 02 on the inside, a fixing cover 04 with a positioning lock groove 20, a positioning lock groove 20 adapted to a positioning lock sleeve 21, a positioning lock groove 20 connected to a positioning lock sleeve 21, a positioning lock sleeve 21 externally connected to a fastening sleeve 24, a threaded support rod 22 internally connected to a positioning lock sleeve 21 through a thread, a threaded support rod 22 passing through the fastening sleeve 24, a control knob 23 on the outer end of the threaded support rod 22, a control knob 23 fitted to the fastening sleeve 2 4. During the injection operation, first pull the workbench 02 toward the outside of the fixed cover 04, then place the experimental mouse on the upper part of the workbench 02, and insert the front and hind legs of the experimental mouse into the front leg insertion holes 12 and the hind leg insertion holes 11 respectively, with the mouse abdomen against the workbench 02, and the mouse back remains flat, and then push the workbench 02 carrying the experimental mouse toward the inside of the fixed cover 04 until the workbench 02 fits with the inner surface of the limit baffle 08, and drive the positioning lock sleeve 21 to move by turning the control knob 23 until it is embedded in the positioning lock groove 20, so as to position and support the workbench 02, and the fixed cover 04 wraps and fixes the body of the experimental mouse to prevent the experimental mouse from scratching and biting, protect the safety of the experimenter, and prevent the experimental mouse from struggling violently, resulting in the displacement of the injection site or the error of the insertion depth operation, and the back of the experimental mouse placed in the fixed cover 04 corresponds to the position of the injection port 05, at this time, the experimenter can perform subcutaneous injection on the experimental mouse through the injection port 05, which is convenient for the experimenter to grasp the injection position and improve the injection effect.

[0027] Embodiment 4:

[0028] The fastening support sleeve 24 of the utility model is externally connected to the fastening buckle 25, the inner side of the fastening buckle 25 is provided with a fastening card plate 26, the two sides of the fastening support sleeve 24 are provided with card plate through holes 28, the threaded support rod 22 is provided with a fastening card slot 27, the fastening card slot 27 and the card plate through holes 28 are adapted to the fastening card plate 26, the fastening card plate 26 passes through the card plate through holes 28, and the fastening card plate 26 is connected to the fastening card slot 27.

[0029] Embodiment 5:

[0030] The fastening buckle 25 of the utility model is divided into an upper fastening buckle 251 and a lower fastening buckle 252. The upper fastening buckle 251 is connected to the lower fastening buckle 252. The upper fastening buckle 251 has fixed protrusions 29 on both sides, and the lower fastening buckle 252 has fixed grooves 30 on both sides. The fixed protrusions 29 are adapted to the fixed grooves 30, and the fixed protrusions 29 are connected to the fixed grooves 30. This device is convenient for placing and pushing experimental mice, improves the subcutaneous injection efficiency of experimental mice, and wraps and fixes the front and rear limbs and body of the experimental mice to avoid the experimental mice from scratching and biting, protects the safety of the experimenters, and keeps the mouse's back straight to avoid the experimental mice from struggling violently or curling their backs, etc., which may cause the injection site to shift or the insertion depth to operate incorrectly. The injection port 05 is provided to facilitate the experimenters to grasp the injection position and improve the injection effect. The insertion distance between the front and rear legs of the mouse can be adjusted accordingly according to the actual body length of the experimental mouse. The device has a wide range of applications, a flexible structure, and is easy to operate.

[0031] Embodiment 6:

[0032] Installation steps: first assemble the fixed cover shell 04 structure, first install and fix the support leg 01 to the lower part of the support plate 06, and install and fix the counterweight block 03 to the lower part of the support leg 01, then place the control knob 23 on the outside of the fastening sleeve 24, and insert the threaded support rod 22 into the fastening sleeve 24 until the card plate through hole 28 corresponds to the position of the fastening slot 27, then place the fastening buckle 25 on the outside of the fastening sleeve 24, and the fastening buckles 25 on both sides are oppositely buckled, the fixing protrusion 29 is embedded in the fixing groove 30, and the fastening card plate 26 is inserted into the fastening slot 27 through the card plate through hole 28, and finally, the positioning lock sleeve 21 is placed into the fastening sleeve 24 from the inside of the fixed cover shell 04, and is sleeved on the outside of the threaded support rod 22, and the positioning lock sleeve 21 is positioned and connected with the threaded support rod 22 through the thread. After completing the assembly of the fixed cover shell 04 structure, assemble the work Assemble the workbench 02 structure, first place the movable plate 13 into the movable through hole 14, and then connect the positioning support rod 09 to the workbench 02 and the movable plate 13 in sequence, until the inner surface of the limiting circular plate 07 fits with the workbench 02, and the positioning support rod 09 is positioned and connected with the movable plate 13 through a thread, and then the adjusting knob 10 is placed on the outside of the workbench 02 and fixedly connected with the positioning support rod 09, and then the workbench 02 is placed on the inside of the fixed cover 04, and the lower surface of the workbench 02 fits with the upper surface of the supporting plate 06, the workbench 02 fits with the inner surface of the limiting baffle 08, and the slider 15 and the roller 18 are respectively embedded in the slideway 16 and the slide groove 17, the positioning lock groove 20 corresponds to the position of the positioning lock sleeve 21, and finally the positioning lock sleeve 21 is driven to move by rotating the control knob 23 until it is embedded in the positioning lock groove 20 to complete the installation.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A subcutaneous injection fixation device for experimental mice, characterized in that : comprising a workbench (02), a fixed cover (04), a positioning support rod (09), a movable plate (13), a positioning locking sleeve (21), a threaded support rod (22), and a fastening buckle (25), wherein the upper portion of the fixed cover (04) is provided with an injection port (05), the lower portion of the fixed cover (04) is provided with a supporting plate (06), the lower portion of the supporting plate (06) is connected to a plurality of supporting legs (01), the supporting legs (01) are connected to a counterweight (03), the upper portion of the supporting plate (06) is provided with a limiting baffle (08), the limiting baffle (08) is connected to the workbench (02), the lower portion of the workbench (02) is connected to the supporting plate ( 06), the support plate (06) has a slider (15), and the workbench (02) has slideways (16) on both sides. The slider (15) is adapted to the slideway (16), the slider (15) is connected to the slideway (16), the slider (15) slides on the slideway (16), the slideway (16) has a slide groove (17), the slide groove (17) is adapted to the roller (18), the roller (18) is connected to the slide groove (17), the roller (18) slides on the slide groove (17), the roller (18) is connected to the slider (15) through a shaft (19), and the shaft (19) is sequentially connected to the slider (15) and the roller (18).

2. The subcutaneous injection fixation device for experimental mice according to claim 1, characterized in that The workbench (02) has rear leg insertion holes (11) on both sides, the workbench (02) has a movable through hole (14), the movable through hole (14) is adapted to the movable plate (13), the movable plate (13) is connected to the movable through hole (14), the positioning support rod (09) is connected to the workbench (02) and the movable plate (13) in sequence, the positioning support rod (09) is connected to the movable plate (13) by a thread, one end of the positioning support rod (09) has a limiting circular plate (07), the limiting circular plate (07) fits the workbench (02), the other end of the positioning support rod (09) is connected to the adjusting knob (10), and the adjusting knob (10) fits the workbench (02).

3. The subcutaneous injection fixation device for experimental mice according to claim 2, characterized in that The fixed cover (04) has a fastening sleeve (24) on the outside, the fixed cover (04) is connected to the workbench (02) on the inside, the workbench (02) has a positioning lock groove (20), the positioning lock groove (20) is adapted to the positioning lock sleeve (21), the positioning lock groove (20) is connected to the positioning lock sleeve (21), the positioning lock sleeve (21) is externally connected to the fastening sleeve (24), the positioning lock sleeve (21) is internally connected to the threaded support rod (22) through a thread, the threaded support rod (22) passes through the fastening sleeve (24), the threaded support rod (22) has a position control knob (23) on the outer end, and the position control knob (23) fits the fastening sleeve (24).

4. The subcutaneous injection fixation device for experimental mice according to claim 3, characterized in that The fastening support sleeve (24) is externally connected to the fastening buckle (25), the fastening buckle (25) is provided with a fastening card plate (26) on the inner side, the fastening support sleeve (24) is provided with card plate through holes (28) on both sides, the threaded support rod (22) is provided with a fastening card slot (27), the fastening card slot (27) and the card plate through hole (28) are adapted to the fastening card plate (26), the fastening card plate (26) passes through the card plate through hole (28), and the fastening card plate (26) is connected to the fastening card slot (27).

5. The subcutaneous injection fixation device for experimental mice according to claim 4, characterized in that The fastening buckle (25) is divided into an upper fastening buckle (251) and a lower fastening buckle (252), the upper fastening buckle (251) is connected to the lower fastening buckle (252), the upper fastening buckle (251) has fixing protrusions (29) on both sides, the lower fastening buckle (252) has fixing grooves (30) on both sides, the fixing protrusions (29) are adapted to the fixing grooves (30), and the fixing protrusions (29) are connected to the fixing grooves (30).

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