A rapid sampling device for microorganisms

Abstract

The application provides a kind of microbial rapid sampling device, belongs to sampling device technical field, including bottom plate, the top of bottom plate is fixedly provided with fixed seat, the top of fixed seat is equipped with the lifting piece acting on mounting seat;The top of mounting seat is equipped with the drive member acting on first connecting frame;The top of first connecting frame is fixedly provided with fixed rod, the outer surface of fixed rod is slidably provided with second connecting frame;Two ends of first connecting frame and two ends of second connecting frame correspond one by one and constitute two groups of sampling components;The top of bottom plate is fixedly provided with sample box, the top of sample box is provided with box cover, and the top of box cover is provided with through hole;Sample box is provided with placing tray, and sampling tube is provided on placing tray;The top of fixed seat is fixedly provided with sterilization box;The bottom of bottom plate is limitingly and slidably provided with sliding block.The application is provided with two groups of sampling components, the position of two groups of sampling components is exchanged, so as to effectively avoid cross contamination, and improve detection accuracy.

Description

Technical Field

[0001] This invention belongs to the field of sampling device technology, specifically relating to a rapid microbial sampling device. Background Technology

[0002] In the field of microbial testing, it is often necessary to sample the surface or internal tissues of solid samples such as vegetables and fruits for microorganisms. Traditional sampling methods often involve manually cutting samples with tools such as scissors and knives, which is cumbersome, makes it difficult to standardize sampling locations and sample volumes, and is prone to introducing external contamination, affecting the accuracy and repeatability of test results. In recent years, some automated sampling devices have begun to be applied in the field of food testing. These devices achieve rapid sample collection through components such as perforated tubes and, in conjunction with sample trays, enable continuous sampling of multiple samples. However, in practical use, existing devices lack effective sterilization or replacement mechanisms for sampling components during continuous sampling, which can easily lead to cross-contamination between samples. Therefore, there is an urgent need for a rapid microbial sampling device.

[0003] Chinese invention patent CN223926022U discloses a sample collector for analyzing harmful microorganisms in vegetables. It includes a lid, a pressure rod, a spring, a perforated tube, a discharge hole, a sample tube, a motor, and a disc holder. In use, the vegetables to be tested for harmful microorganisms are placed on the lid, the pressure rod is pressed and the spring is squeezed, causing the perforated tube to move downwards via the pressure rod, perforating a localized area of ​​the vegetable. The vegetable sample then falls through the discharge hole into the sample tube below. Subsequently, the pressure rod is released and the motor is activated, causing the disc holder to rotate at a specific angle to replace the sample tube, facilitating the next sampling.

[0004] However, the above method cannot effectively sterilize the perforated tube after one sampling, which can cause cross-contamination during continuous sampling and thus affect the accuracy of microbial test results.

[0005] To address the above problems, this invention proposes a rapid microbial sampling device. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention provides a rapid microbial sampling device.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A rapid microbial sampling device includes a base plate, a fixed seat fixedly mounted on the top of the base plate, a mounting seat slidably mounted on the top of the fixed seat, and a lifting component acting on the mounting seat; a first connecting frame rotatably mounted on the top of the mounting seat, and a driving component acting on the first connecting frame; a fixed rod fixedly mounted on the top of the first connecting frame, a second connecting frame slidably sleeved on the outer surface of the fixed rod, and an elastic element disposed between the second connecting frame and the fixed rod; the two ends of the first connecting frame and the two ends of the second connecting frame correspond one-to-one and form two sets of sampling components; A sample box is fixedly mounted on the top of the base plate, and a lid is detachably mounted on the top of the sample box. A through hole is opened on the top of the lid. A placement tray is rotatably mounted inside the sample box, and a plurality of sampling tubes are mounted on the placement tray. The plurality of sampling tubes are sequentially driven to be opposite to the through hole. A sterilization box is fixedly mounted on the top of the fixed base, and two sets of sampling components are respectively driven to be opposite to the through hole and the sterilization box. A slider is slidably mounted on the bottom of the base plate. A first transmission component is mounted on the first connecting frame for driving the slider to slide, and a second transmission component is mounted on the slider for driving the placement tray to rotate.

[0009] Furthermore, the lifting component is an electric push rod, which is fixedly installed on the top of the fixed base, and the telescopic shaft of the electric push rod is fixedly connected to the mounting base.

[0010] Furthermore, the driving component is a motor, which is fixedly mounted on the top of the mounting base, and the output shaft of the motor is fixedly connected to the first connecting bracket.

[0011] Furthermore, the elastic element is a second spring, and a limiting plate is integrally provided on the top of the fixing rod. The second spring is sleeved on the outer surface of the fixing rod, one end of the second spring is fixedly connected to the limiting plate, and the other end is fixedly connected to the second connecting frame.

[0012] Furthermore, the sampling component includes perforated tubes fixedly disposed at both ends of the first connecting frame and ejector rods fixedly disposed at both ends of the second connecting frame. The perforated tubes correspond one-to-one with the ejector rods, and each perforated tube is slidably sleeved on the outer surface of the corresponding ejector rod.

[0013] Furthermore, the first transmission component includes a groove formed at the bottom of the base plate, and the slider is limited and slidably disposed in the groove; a rotating ring is rotatably disposed at the bottom of the first connecting frame, and a rope is fixedly connected between the rotating ring and the slider; a first spring is sleeved on the outer surface of the rope, one end of the first spring is fixedly connected to the slider, and the other end is fixedly connected to the side wall of the groove.

[0014] Furthermore, the second transmission component includes a connecting shaft rotatably disposed within the sample box, the top of the connecting shaft being coaxially and fixedly connected to the bottom of the placement tray, the bottom of the connecting shaft rotatably penetrating through the sample box and the base plate and being fixedly fitted with a one-way gear; a rack is fixedly disposed on the outer surface of the slider, and the rack meshes with the one-way gear.

[0015] Furthermore, a rotation damper is provided at the rotatable connection between the connecting shaft and the sample box.

[0016] The present invention has the following beneficial effects:

[0017] 1. This application employs two sets of sampling components. During the descent of the first connecting frame and the sampling components, driven by the lifting mechanism, one set of sampling components performs sampling while the other set performs sterilization. After sampling, the lifting mechanism raises the sampling components, which in turn rotate the first connecting frame via a drive mechanism, thus exchanging the positions of the two sets of sampling components. This ensures that the sampling components are sterilized before each sampling, effectively preventing cross-contamination and improving detection accuracy.

[0018] 2. As the lifting component raises the first connecting frame, the slider automatically slides with the assistance of the first transmission component, thereby driving the placement tray to rotate via the second transmission component, achieving automatic rotation and replacement of the sample tube. This process is reliable, highly automated, and helps improve the efficiency of continuous sampling. Attached Figure Description

[0019] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is the present invention. Figure 2 A magnified view of a portion of point A in the middle;

[0023] Figure 4 This is the present invention. Figure 2 A magnified view of a portion of point B in the middle;

[0024] Figure 5 This is a schematic diagram of the first connecting frame and sampling component structure of the present invention;

[0025] Figure 6This is an exploded view of the first connecting frame and the second connecting frame of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Base plate; 2. Sample box; 3. Box lid; 4. Through hole; 5. Connecting shaft; 6. Placement tray; 7. One-way gear; 8. Sampling tube; 9. Slide groove; 10. Sliding block; 11. Rack; 12. First spring; 13. Rope; 14. Fixing base; 15. Sterilization box; 16. Electric push rod; 17. Mounting base; 18. Motor; 19. First connecting frame; 20. Rotating ring; 21. Fixing rod; 22. Second connecting frame; 23. Second spring; 24. Material ejection rod; 25. Perforated tube. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1-6 As shown, the technical solution adopted by the present invention is as follows: a rapid microbial sampling device includes a base plate 1, a fixed seat 14 is fixedly provided on the top of the base plate 1, a mounting seat 17 is slidably provided on the top of the fixed seat 14, and a lifting component acting on the mounting seat 17 is also provided; a first connecting frame 19 is rotatably provided on the top of the mounting seat 17, and a driving component acting on the first connecting frame 19 is also provided.

[0030] Specifically, the lifting component is an electric push rod 16, which is fixedly installed on the top of the fixed base 14, and the telescopic shaft of the electric push rod 16 is fixedly connected to the mounting base 17.

[0031] Specifically, such as Figure 4 As shown, the driving component is a motor 18, which is fixedly mounted on the top of the mounting base 17. The output shaft of the motor 18 is fixedly connected to the first connecting bracket 19.

[0032] The first connecting frame 19 is fixedly provided with a fixing rod 21 at its top, and a second connecting frame 22 is slidably sleeved on the outer surface of the fixing rod 21. An elastic element is provided between the second connecting frame 22 and the fixing rod 21. The two ends of the first connecting frame 19 correspond one-to-one with the two ends of the second connecting frame 22 to form two sets of sampling components.

[0033] Specifically, such as Figures 5-6As shown, the elastic element is the second spring 23. A limiting plate is integrally fixed on the top of the fixing rod 21, and the second spring 23 is sleeved on the outer surface of the fixing rod 21. One end of the second spring 23 is fixedly connected to the limiting plate, and the other end is fixedly connected to the second connecting frame 22.

[0034] Specifically, such as Figures 5-6 As shown, the sampling assembly includes perforated tubes 25 fixedly disposed at both ends of the first connecting frame 19 and ejector rods 24 fixedly disposed at both ends of the second connecting frame 22. The perforated tubes 25 and ejector rods 24 correspond one-to-one, and each perforated tube 25 is slidably sleeved on the outer surface of the corresponding ejector rod 24.

[0035] The sample box 2 is fixedly mounted on the top of the base plate 1. A lid 3 is detachably mounted on the top of the sample box 2, and a through hole 4 is provided on the top of the lid 3. A placement tray 6 is rotatably mounted inside the sample box 2. Several sampling tubes 8 are mounted on the placement tray 6, arranged in a circular array around the central axis of the placement tray 6, and each sampling tube 8 is sequentially driven relative to the through hole 4. A sterilization chamber 15 is fixedly mounted on the top of the fixed base 14. The ejector rod 24 and the perforated tube 25 in the two sampling components are respectively driven relative to the through hole 4 and the sterilization chamber 15.

[0036] It should be noted that any sterilization methods that can be used in real life are applicable to the sterilization chamber 15 in this application, such as ultraviolet sterilization and high-temperature sterilization, and this application does not specifically limit them.

[0037] The bottom of the base plate 1 is provided with a slider 10 for limiting sliding, the first connecting frame 19 is provided with a first transmission component for driving the slider 10 to slide, and the slider 10 is provided with a second transmission component for driving the placement plate 6 to rotate.

[0038] Specifically, such as Figures 2-5 As shown, the first transmission component includes a slide groove 9. The slide groove 9 is formed at the bottom of the base plate 1, and the slider 10 is slidably disposed within the slide groove 9. A rotating ring 20 is rotatably disposed at the bottom of the first connecting frame 19. A rope 13 is fixedly disposed between the rotating ring 20 and the slider 10. One end of the rope 13 is fixedly connected to the rotating ring 20, and the other end is fixedly connected to the slider 10. A first spring 12 is sleeved on the outer surface of the rope 13. One end of the first spring 12 is fixedly connected to the slider 10, and the other end is fixedly connected to the side wall of the slide groove 9.

[0039] Specifically, the second transmission component includes a connecting shaft 5, which is rotatably disposed inside the sample box 2. The top of the connecting shaft 5 is coaxially and fixedly connected to the bottom of the placement tray 6. The bottom of the connecting shaft 5 rotatably passes through the sample box 2 and the base plate 1 and is fixedly fitted with a one-way gear 7. A rack 11 is fixedly disposed on the outer surface of the slider 10, and the rack 11 meshes with the one-way gear 7.

[0040] More specifically, a rotation damper (existing technology) is provided at the rotational connection between the connecting shaft 5 and the sample box 2. The rotation damper is used to prevent the connecting shaft 5 from rotating under the influence of the external environment when the one-way gear 7 is idling.

[0041] It should be noted that the one-way gear 7 in this application is composed of a spur gear and a one-way bearing. The spur gear is fixedly sleeved on the outer surface of the outer ring of the one-way bearing, and the inner ring of the one-way bearing is fixedly sleeved on the outer surface of the connecting shaft 5.

[0042] Working principle: In the initial state, the two perforated tubes 25 at both ends of the first connecting frame 19 are located directly above the through hole 4 of the cover 3 and directly above the sterilization chamber 15, respectively. The two ejector rods 24 at both ends of the second connecting frame 22 are slidably disposed in the corresponding perforated tubes 25, and the bottom end of the ejector rod 24 protrudes slightly from the bottom of the perforated tube 25 (see reference). Figure 5 ).

[0043] Place the vegetables flat on the lid 3, ensuring the sampling area is above the through hole 4. Activate the electric push rod 16; the telescopic shaft of the electric push rod 16 drives the mounting base 17 to move downwards. The mounting base 17 then drives the motor 18, the first connecting frame 19, the second connecting frame 22, and the two sets of sampling components to descend synchronously.

[0044] During the descent, the ejector rod 24, located directly above the through-hole 4, first contacts the vegetable. The vegetable obstructs the ejector rod 24, causing it to slide into the perforated tube 25. This, in turn, causes the second connecting frame 22 to slide along the surface of the fixed rod 21, compressing the second spring 23 until the perforated tube 25 contacts the vegetable. Subsequently, the perforated tube 25 continues to descend, perforating the vegetable and separating the vegetable sample from the vegetable body. Once the connection between the vegetable sample and the vegetable body disappears, the second connecting frame 22 descends under the elastic force of the second spring 23, causing the ejector rod 24 to descend synchronously. This pushes the vegetable sample out of the perforated tube 25 and into the sampling tube 8 directly below, completing one sampling operation. Simultaneously, another set of sampling components descends synchronously, with its perforated tube 25 and ejector rod 24 extending into the sterilization chamber 15 for sterilization.

[0045] After sampling is completed, the telescopic shaft of the electric push rod 16 drives the mounting base 17 to move upward, causing the first connecting frame 19, the second connecting frame 22, and the two sets of sampling components to rise synchronously to the initial position (reference). Figure 1 ).

[0046] Subsequently, the electric push rod 16 continues to push the mounting base 17 upward, and the first connecting bracket 19 pulls the rope 13 upward through the rotating ring 20, thereby pulling the slider 10 to slide along the slide groove 9 against the elastic force of the first spring 12, which in turn drives the rack 11 to move. At this time, the one-way gear 7 is in the locked state, driving the connecting shaft 5 to rotate. The connecting shaft 5 drives the placement plate 6 and the sampling tube 8 on the placement plate 6 to rotate as a whole, completing the replacement of the sampling tube 8.

[0047] Then, the telescopic shaft of the electric push rod 16 drives the first connecting frame 19 and the second connecting frame 22 to move downward as a whole until they return to their initial positions. During this process, the first spring 12 resets, pushing the slider 10 and the rack 11 back to their initial positions, but the one-way gear 7 is in an idle state and does not drive the connecting shaft 5 to rotate.

[0048] Subsequently, motor 18 starts, and the output shaft of motor 18 drives the first connecting frame 19 to rotate 180 degrees, causing the two sets of sampling components to exchange positions. The sampling component that was originally performing sampling rotates to be directly above the sterilization chamber 15, and the sampling component that was originally performing sterilization rotates to be directly above the through hole 4.

[0049] After the motor 18 stops rotating, the electric push rod 16 drives the mounting base 17 to descend again, repeating the above-mentioned simultaneous sampling and sterilization operation. At this time, the sampling component that has been sterilized will be used for the next sampling operation, while the used sampling component will be inserted into the sterilization chamber 15 for sterilization treatment, for future interchangeability.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rapid microbial sampling device, characterized in that, Includes a base plate (1), on the top of which a fixed seat (14) is fixedly provided, and on the top of the fixed seat (14) a mounting seat (17) is slidably provided up and down, and a lifting component acting on the mounting seat (17) is also provided; on the top of the mounting seat (17) a first connecting frame (19) is rotatably provided, and a driving component acting on the first connecting frame (19) is also provided; A fixing rod (21) is fixedly installed on the top of the first connecting frame (19), and a second connecting frame (22) is slidably sleeved on the outer surface of the fixing rod (21). An elastic element is provided between the second connecting frame (22) and the fixing rod (21). The two ends of the first connecting frame (19) correspond one-to-one with the two ends of the second connecting frame (22) and form two sets of sampling components; A sample box (2) is fixedly installed on the top of the base plate (1). A box cover (3) is detachably installed on the top of the sample box (2). A through hole (4) is opened on the top of the box cover (3). A placement plate (6) is rotatably installed inside the sample box (2). A plurality of sampling tubes (8) are installed on the placement plate (6). The plurality of sampling tubes (8) are driven to be opposite to the through hole (4) one by one. A sterilization box (15) is fixedly installed on the top of the fixed base (14), and the two sets of sampling components are respectively driven opposite to the through hole (4) and the sterilization box (15); The bottom of the base plate (1) is provided with a slider (10) for limiting sliding. The first connecting frame (19) is provided with a first transmission component for driving the slider (10) to slide. The slider (10) is provided with a second transmission component for driving the placement plate (6) to rotate.

2. The rapid microbial sampling device according to claim 1, characterized in that, The lifting component is an electric push rod (16), which is fixedly installed on the top of the fixed base (14), and the telescopic shaft of the electric push rod (16) is fixedly connected to the mounting base (17).

3. The rapid microbial sampling device according to claim 2, characterized in that, The driving component is a motor (18), which is fixedly mounted on the top of the mounting base (17). The output shaft of the motor (18) is fixedly connected to the first connecting frame (19).

4. The rapid microbial sampling device according to claim 1, characterized in that, The elastic element is a second spring (23). A limiting plate is integrally provided on the top of the fixed rod (21). The second spring (23) is sleeved on the outer surface of the fixed rod (21). One end of the second spring (23) is fixedly connected to the limiting plate, and the other end is fixedly connected to the second connecting frame (22).

5. The rapid microbial sampling device according to claim 1, characterized in that, The sampling assembly includes a perforated tube (25) fixedly disposed at both ends of the first connecting frame (19) and a ejector rod (24) fixedly disposed at both ends of the second connecting frame (22). The perforated tube (25) and the ejector rod (24) correspond one-to-one, and each perforated tube (25) is slidably sleeved on the outer surface of the corresponding ejector rod (24).

6. The rapid microbial sampling device according to claim 1, characterized in that, The first transmission component includes a groove (9) formed at the bottom of the base plate (1), and the slider (10) is limited and slidably disposed in the groove (9); a rotating ring (20) is rotatably disposed at the bottom of the first connecting frame (19), and a rope (13) is fixedly connected between the rotating ring (20) and the slider (10); a first spring (12) is sleeved on the outer surface of the rope (13), one end of the first spring (12) is fixedly connected to the slider (10), and the other end is fixedly connected to the side wall of the groove (9).

7. The rapid microbial sampling device according to claim 1, characterized in that, The second transmission component includes a connecting shaft (5) rotatably disposed inside the sample box (2). The top of the connecting shaft (5) is coaxially and fixedly connected to the bottom of the placement tray (6). The bottom of the connecting shaft (5) rotatably passes through the sample box (2) and the base plate (1) and is fixedly fitted with a one-way gear (7). A rack (11) is fixedly disposed on the outer surface of the slider (10). The rack (11) meshes with the one-way gear (7).

8. A rapid microbial sampling device according to claim 7, characterized in that, A rotation damper is provided at the rotational connection between the connecting shaft (5) and the sample box (2).

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