Portable sampling box for epidemiological investigation of aquatic animals
By designing a portable aquatic animal epidemiological survey sampling box, the problem of inconvenience in carrying and retrieving sampling tools was solved, achieving the effect of convenient carrying and quick retrieval of tools.
Patent Information
- Application Number
- CN202511506671.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2025-12-02
AI Technical Summary
The existing sampling kits for aquatic animal epidemiological surveys are not convenient to carry and retrieve sampling tools, which increases the difficulty and time required for operation.
A portable aquatic animal epidemiological survey sampling box was designed. It can quickly switch between carrying status and mobility through the carrying components, and the carrying height can be adjusted. The internal holding box automatically unfolds to increase the retrieval space.
It enables convenient carrying of the sampling box and quick access to tools, saving sampling preparation time.
Smart Images
Figure CN121044162A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of sampling equipment technology, and in particular to a portable sampling box for epidemiological surveys of aquatic animals. Background Technology
[0002] Aquatic animal epidemiological survey sampling kits are portable tool sets specifically designed for conducting aquatic animal epidemiological surveys. By conducting regular or irregular sampling surveys of aquatic animals, it is possible to promptly identify whether disease infections exist within aquatic animal populations, as well as key information such as the types of pathogens, infection rates, and morbidity rates. For example, by collecting fish samples for virus testing, the early detection of the prevalence of serious fish diseases such as carp spring viremia and infectious hematopoietic organ necrosis can be achieved.
[0003] Traditional aquatic animal epidemiological survey sampling boxes are mostly solid boxes that need to be lifted or carried by staff when needed. This is not convenient for carrying and using in various scenarios and user needs. In addition, the internal space of the box contains a variety of sampling tools, making it difficult to reach the tools in the back, which increases the difficulty and time required for retrieval. Therefore, a portable aquatic animal epidemiological survey sampling box is proposed. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the need for staff to lift or carry the sample when it needs to be carried, which is inconvenient for carrying and using it according to various scenarios and user needs. Furthermore, the internal space of the box contains multiple sampling tools, making it difficult to access tools located deep inside, which increases the difficulty and time required for retrieval. Therefore, this invention proposes a portable aquatic animal epidemiological survey sampling box.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A portable aquatic animal epidemiological survey sampling box includes a sampling box with a door installed on the upper part. A first holding box is slidably connected to the inner side of the sampling box, and a second holding box is rotatably connected to the upper part of the first holding box. The first and second holding boxes automatically unfold sequentially, increasing the retrieval space and facilitating quick access to sampling tools, saving sampling preparation time. The sampling box is equipped with a carrying component, which includes a movable plate slidably connected to the bottom of the sampling box, multiple casters installed on the bottom of the movable plate, a U-shaped plate slidably connected to the inner side of the sampling box, a first movable rod and a second movable rod slidably connected to the upper part of the U-shaped plate, a movable handle slidably connected to the inner sides of the first and second movable rods, and a first... The sampling box includes a locking unit, a second locking unit on the second movable rod, and a third locking unit on the movable handle. After the first locking unit is released, it causes the U-shaped plate to move upward and the movable plate to move downward. The downward movement of the movable plate causes the casters to contact the ground. The upward movement of the U-shaped plate causes the movable handle to move to the upper part of the sampling box. The third locking unit allows the movable handle to move upward. The user pulls the movable handle to move the sampling box via the casters for carrying. The second locking unit engages the locking between the first and second movable rods and the U-shaped plate. The first and second movable rods move to the middle position of the sampling box. The staff can lift the sampling box for carrying using the movable handle. The carrying height can be adjusted according to user needs, making it convenient for users to carry and use in different scenarios.
[0006] The above technical solution further includes: A rotating rod is installed on the upper part of the first container, and the second container is rotatably connected to the end of the rotating rod. A torsion spring is installed between the second container and the first container. When the torsion spring is in a contracted state, it resets and drives the second container to rotate around the rotating rod.
[0007] The sampling box has a first sliding groove on its side. A sliding handle is slidably connected to the inner side of the first sliding groove. The sliding handle is fixedly connected to the first container. A second sliding groove is provided on the upper part of the sliding handle. A first telescopic rod is installed on the inner side of the second sliding groove. A fixing plate is installed at the end of the first telescopic rod. Two first fixing grooves are respectively provided on the inner side of the first sliding groove. The first fixing groove is movably connected to the fixing plate. The fixing plate is slidably connected to the second sliding groove. Pulling the sliding handle along the first sliding groove will move the first container upward.
[0008] The sampling box has a third sliding groove on its inner side, and a second telescopic rod is installed on the inner side of the third sliding groove. The end of the second telescopic rod is fixedly connected to the movable plate, and the movable plate is slidably connected to the third sliding groove.
[0009] The sampling box has a U-shaped groove on its inner side, and a fifth sliding groove is formed on the inner side of the U-shaped groove. A fourth telescopic rod is installed on the inner side of the fifth sliding groove. The end of the fourth telescopic rod is fixedly connected to the U-shaped plate, and the U-shaped plate is slidably connected to the fifth sliding groove.
[0010] The first locking unit includes a first opening slot and a second opening slot respectively opened on the inner side of the sampling box. A first spring is installed on the inner side of the first opening slot, and a first fixing block is installed on the end of the first spring. The first fixing block is slidably connected to the first opening slot. A second fixing slot is opened on the side of the U-shaped plate, and the second fixing slot is movably connected to the first fixing block.
[0011] A second spring is installed on the inner side of the second opening slot, and a second fixing block is installed on the end of the second spring. The second fixing block is slidably connected to the second opening slot. A second round rod and a first round rod are respectively installed on the sides of the second fixing block and the first fixing block. The second round rod and the first round rod are slidably connected to the sampling box. A square plate is installed at the ends of the second round rod and the first round rod. Pulling the square plate can move the first fixing block and the second fixing block through the first round rod and the second round rod. The first fixing block moves to the outside of the second fixing slot and no longer limits the U-shaped plate. The second fixing block no longer limits the movable plate.
[0012] The second fixing block is positioned on the movement trajectory of the movable plate, and the first fixing block is positioned on the movement trajectory of the U-shaped plate.
[0013] The third locking unit includes multiple third fixing slots opened on the side of the first movable rod, a square slot opened on the side of the movable handle, a third telescopic rod installed inside the square slot, a push plate installed at the end of the third telescopic rod, a push rod installed on the side of the push plate away from the third telescopic rod, and a second fixing rod installed on the side of the push plate close to the push rod. The second fixing rod is movably connected to the third fixing slot.
[0014] The second locking unit includes a U-shaped plate with a fourth sliding groove on the upper part, the fourth sliding groove being slidably connected to a first movable rod, a support plate being installed on the side of the second movable rod, a first fixed rod being slidably connected inside the support plate, a third spring being installed on the outside of the first fixed rod, the third spring being fixedly connected to the support plate, and a plurality of fourth fixed grooves being opened on the upper part of the U-shaped plate, the fourth fixed grooves being movably connected to the first fixed rod.
[0015] The present invention has the following beneficial effects: 1. In this invention, by setting a carrying component, the sampling box can be quickly switched from a fixed state to a carrying state for carrying. In the carrying state, the sampling box can be switched between mobile and hand-carrying functions, and the carrying height can be adjusted according to user needs, making it convenient for users to carry and use in different scenarios.
[0016] 2. In this invention, after the box door is opened, the first and second holding boxes can automatically unfold in sequence, increasing the retrieval space and making it convenient for users to quickly retrieve sampling tools, thus saving sampling preparation time. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall first side cross-sectional structure of a portable aquatic animal epidemiological survey sampling box proposed in this invention; Figure 2 This is a schematic diagram of the overall second side cross-sectional structure in this invention; Figure 3 This is a schematic diagram of the overall third side cross-sectional structure in this invention; Figure 4 This is a schematic diagram of the overall top structure of the present invention; Figure 5 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 for Figure 1 Enlarged schematic diagram of the structure at point B; Figure 7 for Figure 2 Enlarged schematic diagram of the structure at point C; Figure 8 for Figure 2 Enlarged schematic diagram of the structure at point D; Figure 9 for Figure 3 Enlarged schematic diagram of the structure at point E in the middle; Figure 10 for Figure 3 Enlarged schematic diagram of the structure at point F; Figure 11 for Figure 4 Enlarged schematic diagram of the structure at point G in the middle; Figure 12 for Figure 4 Enlarged schematic diagram of the structure at point H; Figure 13 for Figure 4 Enlarged schematic diagram of the structure at point I.
[0018] In the diagram: 1. Sampling box; 2. Box door; 3. First container; 4. Second container; 5. Rotating rod; 6. Torsion spring; 7. First sliding groove; 8. Sliding handle; 9. First fixing groove; 10. Fixing plate; 11. Second sliding groove; 12. First telescopic rod; 13. Movable plate; 14. Caster wheel; 15. U-shaped groove; 16. U-shaped plate; 17. Second fixing groove; 18. First opening groove; 19. First fixing block; 20. First spring; 21. First round rod; 22. Second opening groove; 23. Second fixing... 24. Second spring; 25. Square plate; 26. Second round rod; 27. Third sliding groove; 28. Second telescopic rod; 29. Fourth sliding groove; 30. First movable rod; 31. Third fixed groove; 32. Moving handle; 33. Square groove; 34. Push plate; 35. Push rod; 36. Third telescopic rod; 37. Fourth fixed groove; 38. Support plate; 39. First fixed rod; 40. Third spring; 41. Second movable rod; 42. Second fixed rod; 43. Fifth sliding groove; 44. Fourth telescopic rod. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Example 1 like Figure 1 - Figure 13As shown, the present invention proposes a portable aquatic animal epidemiological survey sampling box, comprising a sampling box 1, a box door 2 installed on the upper part of the sampling box 1, a first holding box 3 slidably connected to the inner side of the sampling box 1, and a second holding box 4 rotatably connected to the upper part of the first holding box 3. The first holding box 3 and the second holding box 4 automatically unfold sequentially, increasing the retrieval space and facilitating users to quickly retrieve sampling tools, saving sampling preparation time. The sampling box 1 is provided with a carrying component, which includes a movable plate 13 slidably connected to the bottom of the sampling box 1, multiple universal wheels 14 installed at the bottom of the movable plate 13, a U-shaped plate 16 slidably connected to the inner side of the sampling box 1, a first movable rod 30 and a second movable rod 41 slidably connected to the upper part of the U-shaped plate 16, a movable handle 32 slidably connected to the inner side of the first movable rod 30 and the second movable rod 41, and a first movable rod 30 slidably connected to the inner side of the sampling box 1. The system includes a locking unit, a second locking unit on the second movable rod 41, and a third locking unit on the movable handle 32. After the first locking unit is released, it causes the U-shaped plate 16 to move upward and the movable plate 13 to move downward. The downward movement of the movable plate 13 causes the caster wheel 14 to contact the ground. The upward movement of the U-shaped plate 16 causes the movable handle 32 to move to the upper part of the sampling box 1. The third locking unit allows the movable handle 32 to move upward. The user pulls the movable handle 32 to move the sampling box 1 via the caster wheel 14 for carrying. The second locking unit engages the locking of the first movable rod 30 and the second movable rod 41 with the U-shaped plate 16. The first movable rod 30 and the second movable rod 41 move to the middle position of the sampling box 1. The staff can lift the sampling box 1 using the movable handle 32 for carrying. The carrying height can be adjusted according to user needs, making it convenient for users to carry and use in different scenarios.
[0021] The sampling box 1 has a third sliding groove 27 on its inner side, and a second telescopic rod 28 is installed on the inner side of the third sliding groove 27. The end of the second telescopic rod 28 is fixedly connected to the movable plate 13, and the movable plate 13 is slidably connected to the third sliding groove 27.
[0022] The sampling box 1 has a U-shaped groove 15 on its inner side, and a fifth sliding groove 43 on its inner side. A fourth telescopic rod 44 is installed on the inner side of the fifth sliding groove 43. The end of the fourth telescopic rod 44 is fixedly connected to the U-shaped plate 16, and the U-shaped plate 16 is slidably connected to the fifth sliding groove 43.
[0023] The first locking unit includes a first opening slot 18 and a second opening slot 22 respectively opened on the inner side of the sampling box 1. A first spring 20 is installed on the inner side of the first opening slot 18. A first fixing block 19 is installed on the end of the first spring 20. The first fixing block 19 is slidably connected to the first opening slot 18. A second fixing slot 17 is opened on the side of the U-shaped plate 16. The second fixing slot 17 is movably connected to the first fixing block 19.
[0024] A second spring 24 is installed on the inner side of the second opening slot 22. A second fixing block 23 is installed at the end of the second spring 24. The second fixing block 23 is slidably connected to the second opening slot 22. A second round rod 26 and a first round rod 21 are respectively installed on the sides of the second fixing block 23 and the first fixing block 19. The second round rod 26 and the first round rod 21 are slidably connected to the sampling box 1. A square plate 25 is installed at the ends of the second round rod 26 and the first round rod 21. Pulling the square plate 25 can move the first fixing block 19 and the second fixing block 23 through the first round rod 21 and the second round rod 26. The first fixing block 19 moves to the outside of the second fixing slot 17 and no longer limits the U-shaped plate 16. The second fixing block 23 no longer limits the movable plate 13.
[0025] The second fixed block 23 is positioned on the movement trajectory of the movable plate 13, and the first fixed block 19 is positioned on the movement trajectory of the U-shaped plate 16.
[0026] The third locking unit includes multiple third fixing slots 31 opened on the side of the first movable rod 30, a square slot 33 opened on the side of the movable handle 32, a third telescopic rod 36 installed inside the square slot 33, a push plate 34 installed at the end of the third telescopic rod 36, a push rod 35 installed on the side of the push plate 34 away from the third telescopic rod 36, and a second fixing rod 42 installed on the side of the push plate 34 close to the push rod 35. The second fixing rod 42 is movably connected to the third fixing slot 31.
[0027] The second locking unit includes a fourth sliding groove 29 on the upper part of the U-shaped plate 16, which is slidably connected to the first movable rod 30. A support plate 38 is installed on the side of the second movable rod 41. A first fixed rod 39 is slidably connected inside the support plate 38. A third spring 40 is installed on the outside of the first fixed rod 39 and is fixedly connected to the support plate 38. A plurality of fourth fixed grooves 37 are opened on the upper part of the U-shaped plate 16, which are movably connected to the first fixed rod 39.
[0028] In this embodiment, when sampling box 1 needs to be carried for sampling, the square plate 25 can be pulled away from the sampling box 1, which simultaneously moves the first round rod 21 and the second round rod 26, and moves the first fixing block 19 and the second fixing block 23 to the inside of the first opening slot 18 and the second opening slot 22, respectively. At this time, the first spring 20 and the second spring 24 retract, and the first fixing block 19 moves to the outside of the second fixing slot 17, no longer limiting the U-shaped plate 16. At the same time, the second fixing block 23 no longer limits the movable plate 13. The second fixing block 16 is now in a retracted state. The telescopic rod 28 then resets, causing the movable plate 13 to move along the third sliding groove 27 until the caster wheel 14 contacts the ground. Simultaneously, the retracted fourth telescopic rod 44 resets, causing the U-shaped plate 16 to move along the fifth sliding groove 43. At this point, the sampling box 1 can be quickly switched to the moving state. Then, the push rod 35 can be pushed, causing the push plate 34 to move to the inside of the square groove 33. At this time, the third telescopic rod 36 retracts, and the push plate 34 moves, causing the second fixed rod 42 to move to the outside of the third fixed groove 31, preventing the first movable rod 30 from moving. The sampling box 1 is locked together with the second opening slot 22. Pulling the moving handle 32 moves it upward until it reaches the desired height. Then, releasing the push rod 35 causes the third telescopic rod 36, which is in a retracted state, to reset the push plate 34, thereby causing the second fixing rod 42 to insert into the corresponding third fixing slot 31. At this point, the moving handle 32 can be pulled to move the sampling box 1 via the casters 14. If it is necessary to carry the sampling box 1 by hand, the first fixing rod 39 can be pulled up to move it to the outside of the third sliding slot 27. At this point, the sliding handle 32 can be moved, thereby moving the second movable rod 41 and the first movable rod 30. The first movable rod 30 moves along the fourth sliding groove 29. When the sliding handle 32 moves to the center position of the sampling box 1, the first fixed rod 39 can be released. The third spring 40, which is in a stretched state, will drive the first fixed rod 39 to reset, so that the first fixed rod 39 is inserted into the corresponding position of the fourth fixed groove 37, locking the second movable rod 41 and the first movable rod 30. Then, the height of the sliding handle 32 can be adjusted according to the user's habits, and the sampling box 1 can be lifted for carrying.
[0029] Example 2 like Figure 1 - Figure 13 As shown, based on Embodiment 1, a rotating rod 5 is installed on the upper part of the first container 3, and the second container 4 is rotatably connected to the end of the rotating rod 5. A torsion spring 6 is installed between the second container 4 and the first container 3. When the torsion spring 6 is in a contracted state, it resets and drives the second container 4 to rotate around the rotating rod 5.
[0030] A first sliding groove 7 is provided on the side of the sampling box 1. A sliding handle 8 is slidably connected to the inner side of the first sliding groove 7. The sliding handle 8 is fixedly connected to the first container 3. A second sliding groove 11 is provided on the upper part of the sliding handle 8. A first telescopic rod 12 is installed on the inner side of the second sliding groove 11. A fixing plate 10 is installed at the end of the first telescopic rod 12. Two first fixing grooves 9 are respectively provided on the inner side of the first sliding groove 7. The first fixing grooves 9 are movably connected to the fixing plate 10. The fixing plate 10 is slidably connected to the second sliding groove 11. Pulling the sliding handle 8 along the first sliding groove 7 will move the first container 3 upward.
[0031] In this embodiment, when tools are needed, the box door 2 can be opened, and the fixing plate 10 can be pushed to move along the second sliding groove 11 until the fixing plate 10 moves to the outside of the first fixing groove 9. At this time, the first telescopic rod 12 retracts, and then the sliding handle 8 is pulled along the first sliding groove 7, which simultaneously moves the first container 3 upward until the sliding handle 8 moves to the top of the first sliding groove 7. Then the fixing plate 10 is released, and the first telescopic rod 12, which is in the retracted state, drives the fixing plate 10 to reset, so that the fixing plate 10 is inserted into the first fixing groove 9 at the corresponding position to fix the first container 3. When the first container 3 moves to be parallel to the top of the sampling box 1, the second container 4 is no longer inside the sampling box 1, and the torsion spring 6, which is in the retracted state, resets, and simultaneously drives the second container 4 to rotate around the rotating rod 5 as the center until the second container 4 rotates 180 degrees, thereby increasing the space for taking out the first container 3 and the second container 4, which facilitates the taking out of the sampling tools.
[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A portable aquatic animal epidemiological survey sampling kit, comprising a sampling box (1), characterized in that, The sampling box (1) is equipped with a door (2) on its upper part. A first container (3) is slidably connected to the inner side of the sampling box (1). A second container (4) is rotatably connected to the upper part of the first container (3). A carrying assembly is provided on the sampling box (1). The carrying assembly includes a movable plate (13) slidably connected to the bottom of the sampling box (1), multiple casters (14) installed on the bottom of the movable plate (13), a U-shaped plate (16) slidably connected to the inner side of the sampling box (1), a first movable rod (30) and a second movable rod (41) slidably connected to the upper part of the U-shaped plate (16), a moving handle (32) slidably connected to the inner side of the first movable rod (30) and the second movable rod (41), a first locking unit provided on the sampling box (1), and a second locking unit provided on the second movable rod (41). The third locking unit on the movable handle (32) causes the U-shaped plate (16) to move up and the movable plate (13) to move down after the first locking unit is unlocked. The movable plate (13) moves down and causes the caster wheel (14) to contact the ground. The U-shaped plate (16) moves up and causes the movable handle (32) to move to the upper part of the sampling box (1). The third locking unit can make the movable handle (32) move up. The user pulls the movable handle (32) to move the sampling box (1) through the caster wheel (14) for carrying. The second locking unit contacts the first movable rod (30) and the second movable rod (41) to lock the U-shaped plate (16). The first movable rod (30) and the second movable rod (41) move to the middle position of the sampling box (1). The staff lifts the sampling box (1) through the movable handle (32) for carrying.
2. The portable aquatic animal epidemiological survey sampling box according to claim 1, characterized in that, A rotating rod (5) is installed on the upper part of the first container (3), and the second container (4) is rotatably connected to the end of the rotating rod (5). A torsion spring (6) is installed between the second container (4) and the first container (3).
3. The portable aquatic animal epidemiological survey sampling box according to claim 1, characterized in that, The sampling box (1) has a first sliding groove (7) on its side. A sliding handle (8) is slidably connected to the inner side of the first sliding groove (7). The sliding handle (8) is fixedly connected to the first container (3). A second sliding groove (11) is provided on the upper part of the sliding handle (8). A first telescopic rod (12) is installed on the inner side of the second sliding groove (11). A fixing plate (10) is installed at the end of the first telescopic rod (12). Two first fixing grooves (9) are respectively provided on the inner side of the first sliding groove (7). The first fixing groove (9) is movably connected to the fixing plate (10). The fixing plate (10) is slidably connected to the second sliding groove (11).
4. The portable aquatic animal epidemiological survey sampling box according to claim 1, characterized in that, The sampling box (1) has a third sliding groove (27) on its inner side. A second telescopic rod (28) is installed on the inner side of the third sliding groove (27). The end of the second telescopic rod (28) is fixedly connected to the movable plate (13). The movable plate (13) is slidably connected to the third sliding groove (27).
5. A portable aquatic animal epidemiological survey sampling box according to claim 4, characterized in that, The sampling box (1) has a U-shaped groove (15) on its inner side, and a fifth sliding groove (43) is provided on the inner side of the U-shaped groove (15). A fourth telescopic rod (44) is installed on the inner side of the fifth sliding groove (43). The end of the fourth telescopic rod (44) is fixedly connected to the U-shaped plate (16), and the U-shaped plate (16) is slidably connected to the fifth sliding groove (43).
6. A portable aquatic animal epidemiological survey sampling box according to claim 5, characterized in that, The first locking unit includes a first opening slot (18) and a second opening slot (22) respectively opened on the inner side of the sampling box (1). A first spring (20) is installed on the inner side of the first opening slot (18). A first fixing block (19) is installed at the end of the first spring (20). The first fixing block (19) is slidably connected to the first opening slot (18). A second fixing slot (17) is opened on the side of the U-shaped plate (16). The second fixing slot (17) is movably connected to the first fixing block (19).
7. A portable aquatic animal epidemiological survey sampling box according to claim 6, characterized in that, A second spring (24) is installed on the inner side of the second opening slot (22). A second fixing block (23) is installed at the end of the second spring (24). The second fixing block (23) is slidably connected to the second opening slot (22). A second round rod (26) and a first round rod (21) are respectively installed on the sides of the second fixing block (23) and the first fixing block (19). The second round rod (26) and the first round rod (21) are slidably connected to the sampling box (1). A square plate (25) is installed at the ends of the second round rod (26) and the first round rod (21).
8. A portable aquatic animal epidemiological survey sampling box according to claim 7, characterized in that, The second fixed block (23) is on the movement trajectory of the movable plate (13), and the first fixed block (19) is on the movement trajectory of the U-shaped plate (16).
9. A portable aquatic animal epidemiological survey sampling box according to claim 1, characterized in that, The third locking unit includes multiple third fixing slots (31) opened on the side of the first movable rod (30), and a square slot (33) opened on the side of the movable handle (32). A third telescopic rod (36) is installed inside the square slot (33). A push plate (34) is installed at the end of the third telescopic rod (36). A push rod (35) is installed on the side of the push plate (34) away from the third telescopic rod (36). A second fixing rod (42) is installed on the side of the push plate (34) close to the push rod (35). The second fixing rod (42) is movably connected to the third fixing slot (31).
10. A portable aquatic animal epidemiological survey sampling box according to claim 1, characterized in that, The second locking unit includes a fourth sliding groove (29) on the upper part of a U-shaped plate (16), which is slidably connected to a first movable rod (30). A support plate (38) is installed on the side of the second movable rod (41), and a first fixed rod (39) is slidably connected inside the support plate (38). A third spring (40) is installed on the outside of the first fixed rod (39), and the third spring (40) is fixedly connected to the support plate (38). A plurality of fourth fixed grooves (37) are opened on the upper part of the U-shaped plate (16), and the fourth fixed grooves (37) are movably connected to the first fixed rod (39).