Portable food pesticide residue detector

Abstract

The utility model relates to a portable food pesticide residue detector which comprises a storage box with an upper opening, a cover body is rotatably mounted on the storage box and used for sealing the opening of the storage box, a detection device is arranged in the storage box, and pressing blocks in one-to-one correspondence with detection positions of the detection device are arranged on the inner wall of the cover body. Supports in one-to-one correspondence with the pressing blocks are arranged on the inner wall of the cover body, the pressing blocks are rotationally installed on the supports, and locking mechanisms are arranged on the supports and used for fixing the pressing blocks. The device has the advantages that when pollution occurs on the abutting face of the pressing block, the pressing block is rotated, the abutting face of the pressing block is switched, the pollution on the pressing block cannot interfere with a next detection sample, and the detection precision is improved.

Description

Technical Field

[0001] This application relates to the field of food pesticide residue detection equipment, and in particular to a portable food pesticide residue detector. Background Technique

[0002] The amount of pesticide residues in food is an important indicator of food safety. Usually, food samples are taken back to the laboratory for testing. Although this testing method has high detection accuracy and accurate results, the detection speed is relatively slow, which is not highly adaptable to the large population in China.

[0003] In view of the actual situation of the large population base in China, portable pesticide residue detection equipment has emerged. Such equipment usually includes an openable test box, and a detection device is installed inside the test box. The detection device uses the rapid test card method as the detection method. The cholinesterase in the rapid test card can catalyze the hydrolysis of indophenol acetate into acetic acid and indophenol. Since organophosphorus and carbamate pesticides have a strong inhibitory effect on the activity of cholinesterase, therefore, according to the different colors, the residual situation of organophosphorus or carbamate pesticides in the sample can be judged.

[0004] The detection device in the test box is provided with a detection table, and a plurality of detection positions are arranged on the detection table. During detection, first, fold the rapid test card in half, then clamp the end of the rapid test card with the cholinesterase tablet at the detection position, and then drop the soaking solution of the test sample on the cholinesterase tablet for reaction. After ten minutes, close the lid of the test box. Corresponding to the detection positions on the lid of the test box, there are pressing blocks. The color-developing tablet on the rapid test card is pressed against the cholinesterase tablet by the pressing blocks for three minutes for color development. After three minutes, open the lid for color comparison. At the same time, heating sheets are arranged at the detection positions of the rapid test card to heat the rapid test card, so that the reaction between the sample and the tablet can be carried out at a suitable temperature.

[0005] Regarding the above related technologies, the inventor believes that there are the following defects: during the process of pressing the color-developing tablet against the cholinesterase tablet by the pressing block, the pressing block may be contaminated by the sample on the cholinesterase tablet, resulting in errors in the next test result. Utility Model Content

[0006] In order to solve the situation that the pressing block in the traditional portable card-type pesticide residue detector may be contaminated by the test sample during the test, resulting in errors in the next test result, this application provides a portable food pesticide residue detector.

[0007] A portable food pesticide residue detector provided by this application adopts the following technical solutions:

[0008] A portable food pesticide residue detector, comprising a storage box with an upper opening, a cover body rotatably installed on the storage box, the cover body being used to close the opening of the storage box, a detection device being arranged in the storage box, pressing blocks corresponding one by one to the detection positions of the detection device being arranged on the inner wall of the cover body, brackets corresponding one by one to the pressing blocks being arranged on the inner wall of the cover body, the pressing blocks being rotatably installed on the brackets, and a locking mechanism being arranged on the brackets for fixing the pressing blocks.

[0009] By adopting the above technical solution, when the abutting surface of the pressing block is contaminated, the pressing block is rotated to switch the abutting surface of the pressing block, so that the contamination on the pressing block does not interfere with the next test sample, and the detection accuracy is improved.

[0010] Optionally, the bracket includes two mounting rods, one end of each mounting rod is connected to the inner wall of the cover body, a rotating shaft is coaxially installed on the pressing block, and both ends of the rotating shaft are respectively rotatably installed on one ends of the two mounting rods. The locking mechanism includes two fixing pieces, the cross section of one end of the rotating shaft is polygonal, the two fixing pieces are made of elastic pieces, and the fixing pieces are bent along the outer edge of the polygonal end of the rotating shaft, the polygonal end of the rotating shaft is located between the two fixing pieces, and the fixing pieces fit and abut against the side wall of the rotating shaft.

[0011] By adopting the above technical solution, after the pressing block is rotated to a proper position, the rotating shaft is positioned by the fixing piece, and then the pressing block is positioned.

[0012] Optionally, chamfers are arranged on the edges of the pressing block.

[0013] By adopting the above technical solution, when one of the abutting surfaces of the pressing block is contaminated, due to the existence of the chamfer, the other abutting surfaces of the pressing block are not easily contaminated.

[0014] Optionally, the mounting rod includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are parallel to each other and are slidably connected, the first connecting rod is connected to the inner wall of the cover body, both ends of the rotating shaft are respectively rotatably connected to the two second connecting rods, and a damping layer is arranged at the sliding connection part of the first connecting rod and the second connecting rod.

[0015] By adopting the above technical solution, during the process of the cover body rotating to press the pressing block against the rapid test card, the mutually slidably connected first connecting rod and second connecting rod are used to release the excessive pressure of the pressing block on the tablet of the rapid test card. At the same time, the damping layer ensures that the pressing block has sufficient pressure on the rapid test card, so that the tablets of the rapid test card are not easily crushed, and the two tablets of the rapid test card can abut against each other for sufficient reaction.

[0016] Optionally, rotation grooves are formed on opposite sides of the ends of the two second connecting rods facing away from the cover body. One end of the rotating shaft is slidably rotatably installed in the rotation groove. One end of the rotation groove penetrates through one end surface of the mounting rod where it is located. The fixing piece is installed in one of the rotation grooves, and two positioning pieces are arranged in the other rotation groove. The positioning pieces are bent in an arc shape. The cylindrical end of the rotating shaft is located between the two positioning pieces. The positioning pieces are in close contact with the side wall of the rotating shaft, and the positioning pieces are also made of elastic pieces.

[0017] By adopting the above technical solution, the positioning piece is used to position the rotating shaft, so that when the rotating shaft is rotatably installed in the rotation groove, it is not easy to slide along the length direction of the rotation groove. At the same time, since the rotation groove penetrates through the end surface of the second connecting rod, the rotating shaft and the pressing block can be detached from the second connecting rod along the direction of the rotation groove for cleaning.

[0018] Optionally, curling edges are provided at the ends of the positioning piece and the fixing piece facing away from the cover body.

[0019] By adopting the above technical solution, the curling edge is used to guide the sliding of the rotating shaft to push the positioning piece and the fixing piece to deform, so that the rotating shaft can slide into the space between the positioning piece and the fixing piece more conveniently.

[0020] Optionally, a rotating handle is provided at one end of the rotating shaft. One end of the rotating handle slidably passes through the mounting rod and is detachably connected to one end of the rotating shaft coaxially.

[0021] By adopting the above technical solution, the staff can rotate the rotating shaft and the pressing block more conveniently through the rotating handle, and at the same time, the hand will not cause secondary pollution to the pressing block when rotating the pressing block.

[0022] Optionally, a threaded hole is coaxially formed at one end of the rotating shaft, and a connecting stud that is in threaded fit with the threaded hole is coaxially provided at one end of the rotating handle. The rotating handle is threadedly connected to the rotating shaft through the connecting stud.

[0023] By adopting the above technical solution, the staff can detach or install the rotating handle more conveniently.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. When the contact surface of the pressing block is contaminated, rotate the pressing block to switch the contact surface of the pressing block, so that the contamination on the pressing block will not interfere with the next test sample, improving the test accuracy;

[0026] 2. Due to the existence of the chamfer, when one contact surface of the pressing block is contaminated, the other contact surfaces of the pressing block are not easily contaminated; Description of the Drawings

[0027] Figure 1 It is a schematic three-dimensional structure diagram of the related art of the present application.

[0028] Figure 2 It is a schematic three-dimensional structure diagram of the present application.

[0029] Figure 3 It is an exploded view of the present application.

[0030] Figure 4 It is an exploded view of the present application from another angle.

[0031] Figure 5 It is Figure 3 an enlarged schematic view of part A in

[0032] Figure 6 It is Figure 4 an enlarged schematic view of part B in

[0033] Those skilled in the art will understand that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the dimensions and positions of some elements in the drawings may be enlarged relative to other elements to help improve the understanding of the embodiments of the present invention.

[0034] Reference numerals: 1, storage box; 2, cover body; 3, pressing block; 31, rotating shaft; 311, threaded hole; 4, bracket; 41, mounting rod; 411, first connecting rod; 412, second connecting rod; 413, rotating groove; 5, locking mechanism; 51, fixing piece; 6, chamfer; 7, damping layer; 8, positioning piece; 9, curled edge; 10, rotating handle; 101, connecting stud. Embodiment

[0035] Referring to Figure 1 , a conventional portable pesticide residue detector includes a long strip-shaped storage box 1, a cover body 2 is rotatably installed on the storage box 1, a plurality of pressing blocks 3 are fixedly installed on the side of the cover body 2 facing the storage box 1, a detection device is fixedly installed in the storage box 1, a detection table is arranged on the detection device, a plurality of card interfaces are arranged on the detection table, the pressing blocks 3 correspond to the card interfaces one by one, and the rapid test card is clamped at the card interface.

[0036] An embodiment of the present application discloses a portable food pesticide residue detector. Referring to Figure 2 , it includes a long strip-shaped storage box 1, a detection device is fixedly installed inside the storage box 1, the detection device is provided with a detection table, the storage box 1 has an upper opening, and the tabletop of the detection table is located at the upper opening of the storage box 1. A plurality of heating sheets are arranged on the tabletop of the detection table along the length direction of the storage box 1, and card interfaces are arranged at the heating sheets for clamping the rapid test card.

[0037] Referring to Figure 2, a cover body 2 is rotatably installed on the storage box 1. A plurality of cuboid-shaped pressing blocks 3 are arranged on the inner wall of the cover body 2 facing the storage box 1. The pressing blocks 3 are arranged along the length direction of the cover body 2, and the pressing blocks 3 correspond to the heating sheets one by one. A plurality of brackets 4 are also arranged on the inner wall of the cover body 2 facing the storage box 1. The brackets 4 are arranged along the length direction of the cover body 2. The bracket 4 includes two mounting rods 41. The mounting rod 41 includes a first connecting rod 411 and a second connecting rod 412. The first connecting rod 411 is fixedly installed on the inner side wall of the cover body 2 facing the storage box 1, and the first connecting rod 411 is perpendicular to the inner side wall of the storage box 1 where it is located. The second connecting rod 412 is parallel to the first connecting rod 411, and the second connecting rod 412 is slidably installed on the first connecting rod 411. A damping layer 7 is arranged at the sliding connection of the second connecting rod 412 and the first connecting rod 411.

[0038] Refer to Figure 2 , Figure 3 and Figure 5 , after the cholinesterase tablet reaction is completed, rotate the cover body 2 to press down the rapid test card, so that the color-developing tablet is pressed tightly on the cholinesterase tablet for color development reaction. At this time, when the first connecting rod 411 and the second connecting rod 412 which are slidably connected make the pressing block 3 abut against the tablet, the excessive abutting stroke of the pressing block 3 is offset by sliding, so that the tablet is not easily crushed. At the same time, through the damping layer 7, the pressing block 3 can give enough pressure to the tablet, so that the cholinesterase tablet and the color-developing tablet can be in full contact for color development reaction.

[0039] Refer to Figure 4 , Figure 5 and Figure 6 , on the opposite sides of the ends of the two first connecting rods 411 away from the cover body 2, rotation grooves 413 are respectively formed. One end of the rotation groove 413 penetrates through the end surface of the mounting rod 41 away from the cover body 2. The pressing blocks 3 are respectively arranged between the two mounting rods 41 of the bracket 4. A rotating shaft 31 is coaxially and fixedly installed on the pressing block 3. One end of the rotating shaft 31 is cylindrical, and the cross-section of the other end of the rotating shaft 31 is square.

[0040] Refer to Figure 5 and Figure 6 , the two ends of the rotating shaft 31 of the pressing block 3 are respectively rotatably installed in the two rotation grooves 413, and a locking mechanism 5 is arranged in the rotation groove 413 at the square end of the rotating shaft 31. The locking mechanism 5 includes fixing pieces 51 made of two metal elastic pieces. The two fixing pieces 51 are both bent at right angles and are attached to and abut against the side walls of the square end of the rotating shaft 31. The fixing pieces 51 are fixedly installed in the rotation groove 413, and the rotating shaft 31 is locked by the fixing pieces 51.

[0041] Refer to Figure 5 and Figure 6, two positioning pieces 8 are also fixedly installed in another rotating groove 413. The positioning pieces 8 are arc-shaped and fit tightly against the side wall of the cylindrical end of the rotating shaft 31, and the rotating shaft 31 is positioned in the rotating groove 413 through the positioning pieces 8.

[0042] Referring to Figure 5 and Figure 6 , a connection hole is penetrated and opened on the side wall of the mounting rod 41 connected to the cylindrical end of the rotating shaft 31. The connection hole is coaxial with the rotating shaft 31. A rotating handle 10 is arranged on the rotating shaft 31. A connecting stud 101 is integrally and coaxially arranged on the rotating handle 10. A threaded hole 311 that is threadedly matched with the connecting stud 101 is coaxially opened on the end face of the cylindrical end of the rotating shaft 31. One end of the rotating handle 10 slides through the connection hole and is fixedly installed on the rotating shaft 31 through the threaded connection between the connecting stud 101 and the threaded hole 311. The rotating shaft 31 is driven to rotate by the rotating handle 10, and then the pressing block 3 is driven to rotate.

[0043] Referring to Figure 5 and Figure 6 , chamfers 6 are arranged on twelve edges of the pressing block 3. When the pressing block 3 presses the rapid test card, if one side of the pressing block 3 is contaminated, due to the avoidance of the chamfers 6, the adjacent two sides of the pressing block 3 are not easily contaminated at the same time.

[0044] The implementation principle of an embodiment of a portable food pesticide residue detector in this application is as follows: When the pressing block 3 presses against the rapid test card, so that the chromogenic tablet and the cholinesterase tablet are pressed tightly for a chromogenic reaction, if the pressing surface of the pressing block 3 is contaminated by the sample, the pressing block 3 is driven to rotate by the rotating handle 10 to switch the pressing surface of the pressing block 3, so that when detecting next time, the contaminated pressing surface of the pressing block 3 will not contaminate the sample. The fixing piece 51 is used to fix the rotation angle of the pressing block 3 at 90 degrees. In cooperation with the first connecting rod 411 and the second connecting rod 412 that are slidably connected, the pressing surface of the pressing block 3 is always parallel to the tablet when pressing against the tablet, and the pressing force on each part of the tablet is relatively uniform. At the same time, the fixing piece 51 locks the rotating shaft 31 and the pressing block 3, and the pressing block 3 is not easily rotated by itself.

[0045] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A portable food pesticide residue detector, comprising a storage box (1) with an upper opening, a cover (2) rotatably mounted on the storage box (1), the cover (2) being used to close the opening of the storage box (1), a detection device being arranged in the storage box (1), and a pressing block (3) corresponding to a detection position of the detection device being arranged on the inner wall of the cover (2), characterized in that: A bracket (4) corresponding to the pressing block (3) is arranged on the inner wall of the cover body (2); the pressing block (3) is rotatably mounted on the bracket (4); and a locking mechanism (5) is arranged on the bracket (4) for fixing the pressing block (3).

2. A portable food pesticide residue detector according to claim 1, characterized in that: The bracket (4) comprises two mounting rods (41), one end of each mounting rod (41) is connected to the inner wall of the cover body (2), a rotating shaft (31) is coaxially mounted on the pressing block (3), and both ends of the rotating shaft (31) are rotatably mounted on one end of the two mounting rods (41), respectively; the locking mechanism (5) comprises two fixing plates (51), one end of the rotating shaft (31) has a polygonal cross-section, the two fixing plates (51) are made of elastic plates, and the fixing plates (51) are bent to fit the outer edge of one end of the polygon of the rotating shaft (31), the polygonal end of the rotating shaft (31) is located between the two fixing plates (51), and the fixing plate (51) fits tightly against the side wall of the rotating shaft (31).

3. A portable food pesticide residue detector according to claim 1, characterized in that: The edges of the pressing block (3) are all provided with chamfers (6).

4. A portable food pesticide residue detector according to claim 2, characterized in that: The mounting rod (41) comprises a first connecting rod (411) and a second connecting rod (412); the first connecting rod (411) and the second connecting rod (412) are parallel to each other and slidably connected; the first connecting rod (411) is connected to the inner wall of the cover body (2); the two ends of the rotating shaft (31) are respectively rotatably connected to the two second connecting rods (412); and a damping layer (7) is provided at the slidably connected position between the first connecting rod (411) and the second connecting rod (412).

5. A portable food pesticide residue detector according to claim 4, characterized in that: A rotation groove (413) is provided on the opposite side of one end of the two second connecting rods (412) away from the cover body (2); one end of the rotating shaft (31) is slidably and rotatably installed in the rotation groove (413); one end of the rotating groove (413) passes through an end surface of the mounting rod (41) in which it is located; the fixing plate (51) is installed in one of the rotating grooves (413); two positioning plates (8) are provided in the other rotating groove (413); the positioning plates (8) are bent in an arc shape; the cylindrical end of the rotating shaft (31) is located between the two positioning plates (8); the positioning plates (8) are tightly fitted against the side wall of the rotating shaft (31); and the positioning plates (8) are also made of elastic plates.

6. A portable food pesticide residue detector according to claim 5, characterized in that: The positioning sheet (8) and the fixing sheet (51) are both provided with a curling edge (9) at one end facing away from the cover body (2).

7. A portable food pesticide residue detector according to claim 2, characterized in that: A rotating handle (10) is provided on one end of the rotating shaft (31), and one end of the rotating handle (10) slides through the mounting rod (41) and is coaxially detachably connected to one end of the rotating shaft (31).

8. A portable food pesticide residue detector according to claim 7, characterized in that: A threaded hole (311) is coaxially provided on one end of the rotating shaft (31), and a connecting stud (101) threadably matched with the threaded hole (311) is coaxially provided on one end of the rotating handle (10), and the rotating handle (10) is threadably connected to the rotating shaft (31) via the connecting stud (101).

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