Portable food surface microorganism sampling and culturing device

Abstract

The invention relates to the technical field of food safety, and discloses a portable food surface microorganism sampling culture device which comprises an outer box, a box cover is movably mounted at the top of the outer box, and a material containing assembly which extends to the inner side of the outer box and is connected with the outer box is arranged on the right side of the outer box; a moving assembly is arranged between the left side and the right side of the inner wall of the outer box, a handle is fixedly installed at the top of the box cover, a strap fixedly connected with the right side of the outer box is fixedly installed on the left side of the outer box, a culture mechanism is arranged on the inner bottom wall of the outer box, and a mixing mechanism is arranged on the inner side of the culture mechanism; a mounting mechanism is arranged at the bottom of the moving assembly, and a sampling mechanism extending to the bottom of the mounting mechanism is movably mounted on the inner side of the mounting mechanism. According to the portable food surface microorganism sampling and culturing device, by arranging the culturing mechanism and the mixing mechanism, the purpose of arranging the mixing mechanism is achieved; the purpose that the sampling head can be replaced is achieved.

Description

A portable food surface microbial sampling and culture device Technical Field

[0001] This invention relates to the field of food safety technology, specifically to a portable device for sampling and culturing microorganisms on the surface of food. Background Technology

[0002] A search revealed Chinese Patent Publication No. CN220335194U, which discloses a portable veterinary testing microbial sampling and culture device. This device includes a walking mechanism, a shell, a constant temperature mechanism, a controller, a power module, a sampling device, a robotic arm, a vision sensor, a pull-out clamping mechanism, and a fixing groove. This new invention significantly reduces the volume of the microbial sampling, inoculation, and culture devices through automated design, thus combining the sampling and culture devices into one unit. It is also easy to carry and improves diagnostic efficiency. The existing technical solutions described above have the following drawbacks: the sampling head is not replaceable, making it impossible to select different sampling heads as needed, resulting in poor applicability. Furthermore, the lack of a mixing structure leads to uneven mixing of the buffer solution and sample after sampling, affecting the culture effect. Therefore, this invention proposes a portable food surface microbial sampling and culture device to address these issues. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a portable food surface microbial sampling and cultivation device with the advantages of a replaceable sampling head and a mixing structure, thus solving the problems mentioned in the background section.

[0005] (II) Technical Solution

[0006] To achieve the aforementioned purpose of a replaceable sampling head with a mixing structure, the present invention provides the following technical solution: a portable food surface microbial sampling and cultivation device, comprising an outer box, a lid movably mounted on the top of the outer box, a material holding component extending to and connected to the right side of the outer box, a moving component between the left and right sides of the inner wall of the outer box, a handle fixedly mounted on the top of the lid, a shoulder strap fixedly mounted on the left side of the outer box and fixedly connected to its right side, a cultivation mechanism provided on the inner bottom wall of the outer box, a mixing mechanism provided on the inner side of the cultivation mechanism, an installation mechanism provided at the bottom of the moving component, and a sampling mechanism extending to its bottom movably mounted on the inner side of the installation mechanism;

[0007] The material holding assembly includes movable blocks. Movable blocks are slidably installed on both the front and rear sides of the inner wall of the outer box. A tray extending to the right side of the outer box is fixedly installed between two movable blocks. An mounting plate that fits against the right side of the outer box is fixedly installed on the right side of the tray. A handle is fixedly installed on the right side of the mounting plate. A telescopic spring that is fixedly connected to the right side of the inner wall of the outer box is fixedly installed on the right side of the movable block. A limit frame is fixedly installed on the top of the tray. A holding frame located inside the limit frame is movably installed on the top of the tray.

[0008] Preferably, the culture mechanism includes a mounting base, and the inner bottom wall of the outer box is fixedly mounted with a mounting base fixedly connected to the left side of its inner wall. The inner bottom wall of the mounting base is rotatably connected with two rotating shafts that extend to their tops, and a culture dish is movably mounted on the top of the rotating shafts.

[0009] Preferably, the mixing mechanism includes gears, with gears fixedly mounted on the outer side of the rotating shaft, support frames fixedly mounted on both the front and rear sides of the inner wall of the mounting base, a movable frame slidably mounted between the inner sides of the two support frames, a rack fixedly mounted on the bottom of the movable frame, the rack meshing with the rear sides of the two gears, a servo motor fixedly mounted on the inner bottom wall of the mounting base, a cam fixedly mounted on the output shaft of the servo motor, and a round rod slidably connected to the movable frame fixedly mounted on the top of the cam.

[0010] Preferably, the moving component includes a servo motor, the servo motor is fixedly installed on the left side of the inner wall of the outer box, a threaded rod that is rotatably connected to the right side of the inner wall of the outer box is fixedly installed at the output shaft of the servo motor, a guide frame located behind the threaded rod is fixedly installed between the left and right sides of the inner wall of the outer box, a threaded block is threadedly connected to the outer side of the threaded rod, and a limiting block extending to the inner side of the guide frame and slidably connected thereto is fixedly installed on the rear side of the threaded block.

[0011] Preferably, the mounting mechanism includes a rectangular block, a rectangular block is fixedly mounted on the bottom of the threaded block, an electric push rod is fixedly mounted on the bottom of the rectangular block, a housing is fixedly mounted on the output end of the electric push rod, a stabilizing frame extending to the inner side of the housing is fixedly mounted on the bottom of the housing, a top frame is fixedly mounted on the inner top wall of the housing, two U-shaped frames are fixedly mounted on the inner bottom wall of the housing and located on the left and right sides of the stabilizing frame, a support rod is fixedly mounted between the front and rear sides of the inner wall of the U-shaped frame, a swing plate is rotatably connected to the outer side of the support rod, a fixing spring fixedly mounted on one side of the swing plate and fixedly connected to the inner wall of the housing, wedge blocks are fixedly mounted on opposite sides of the two swing plates, and push rods extending to the outer side of the housing are fixedly mounted on opposite sides of the two swing plates.

[0012] Preferably, the sampling mechanism includes a vertical rod, which is movably installed inside the box body. One top end of the vertical rod extends to the inside of the top frame, and one bottom end of the vertical rod extends to the bottom of the box body. One end of the wedge block extends to the inside of the vertical rod and engages with it. A connecting rod is fixedly installed at the bottom of the vertical rod, and a sampling ring is fixedly installed at the bottom of the connecting rod.

[0013] Preferably, the upright has slots on both the left and right sides, the size of which is adapted to the movement trajectory of the wedge block, the bottom of the wedge block is inclined, the inner wall of the stabilizing frame has openings on both the upper and lower sides, and the inner bottom wall of the box has mounting holes adapted to the stabilizing frame.

[0014] Preferably, the inner side of the movable frame is provided with a slotted hole that matches the moving trajectory of the round rod, the inner side of the support frame is provided with a sliding hole, the size of which matches the moving trajectory of the movable frame, and the top of the mounting base is provided with a mounting groove.

[0015] Preferably, a through hole is provided on the right side of the inner wall of the outer box, the mounting plate is larger than the size of the through hole, and the two moving blocks are symmetrically distributed front and back.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a portable food surface microbial sampling and culture device, which has the following beneficial effects:

[0018] 1. This portable food surface microbial sampling and culture device, by setting up a culture mechanism and a mixing mechanism, uses a servo motor as a power source to drive the cam to rotate. Its adjustable speed allows control of the mixing frequency. When the cam rotates, the round rod slides in the slot of the moving frame, converting the rotational motion into the reciprocating linear motion of the moving frame. The moving frame meshes with a gear through a rack and pinion, converting the linear motion into the rotation of the gear. The gear is fixed on the outside of the rotating shaft, and its transmission ratio ensures that the rotating shaft and the gear rotate synchronously, thereby driving the culture dish to rotate, thus achieving the purpose of having a mixing structure.

[0019] 2. This portable food surface microbial sampling and culture device, through the setting of an installation mechanism and a sampling mechanism, first lifts the upright pole upwards, then presses the push rods on the left and right sides of the box body simultaneously with both hands. The push rods push the swing plate inwards, compressing the fixed spring, causing the swing plate to swing around the support rod to both sides. The swing plate drives the wedge block to exit from the slot of the upright pole, releasing the vertical restriction on the upright pole, so that the upright pole can be taken down and the new sampling mechanism can be installed, thus achieving the purpose of replaceable sampling head. Attached Figure Description

[0020] Figure 1 is a three-dimensional view of the structure of the present invention;

[0021] Figure 2 is a left-side sectional perspective view of a partial structure of the present invention;

[0022] Figure 3 is a perspective view of the material holding component of the present invention;

[0023] Figure 4 is a perspective view of the movable component of the present invention;

[0024] Figure 5 is one of the left-side sectional perspective views of the installation mechanism and sampling mechanism of the present invention;

[0025] Figure 6 is a second perspective view of the left sectional section of the installation mechanism and sampling mechanism of the present invention;

[0026] Figure 7 is an exploded cross-sectional view of the culture mechanism of the present invention;

[0027] Figure 8 is a partial cross-sectional perspective view of the culture mechanism of the present invention.

[0028] In the diagram: 1 Outer box, 2 Box lid, 3 Material holding assembly, 31 Moving block, 32 Tray, 33 Mounting plate, 34 Handle, 35 Telescopic spring, 36 Limiting frame, 37 Container frame, 4 Culture mechanism, 41 Mounting base, 42 Rotating shaft, 43 Culture dish, 5 Mixing mechanism, 51 Gear, 52 Support frame, 53 Moving frame, 54 Rack, 55 Servo motor, 56 Cam, 57 Round rod, 6 Moving assembly, 61 Servo motor, 62 Threaded rod, 63 Guide frame, 64 Threaded block, 65 Limiting block, 7 Mounting mechanism, 701 Rectangular block, 702 Electric push rod, 703 Box body, 704 Stabilizing frame, 705 Top frame, 706 U-shaped frame, 707 Support rod, 708 Swing plate, 709 Fixed spring, 710 Wedge block, 711 Push rod, 8 Sampling mechanism, 81 Vertical pole, 82 Connecting rod, 83 Sampling ring, 9 Handle, 10 Shoulder strap. Detailed Implementation

[0029] 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.

[0030] Please refer to Figures 1-8. This invention provides a technical solution: a portable food surface microbial sampling and culture device, including an outer box 1. A lid 2 is movably installed on the top of the outer box 1 to ensure the sealing of the device during sampling and culture, preventing microbial contamination. An ultraviolet lamp is provided at the bottom of the lid 2. A material holding component 3 is provided on the right side of the outer box 1, extending to and connected to the inside of the outer box 1. A moving component 6 is provided between the left and right sides of the inner wall of the outer box 1. A handle 9 is fixedly installed on the top of the lid 2. A shoulder strap 10 is fixedly installed on the left side of the outer box 1 and fixedly connected to the right side. The handle 9 facilitates short-distance hand handling, and the shoulder strap 10 supports long-distance carrying, improving the portability of the device. A culture mechanism 4 is provided on the inner bottom wall of the outer box 1. A mixing mechanism 5 is provided on the inner side of the culture mechanism 4. An installation mechanism 7 is provided at the bottom of the moving component 6. A sampling mechanism 8 extending to the bottom of the installation mechanism 7 is movably installed on the inner side of the installation mechanism 7.

[0031] The material holding assembly 3 includes movable blocks 31. Movable blocks 31 are slidably installed on both the front and rear sides of the inner wall of the outer box 1 to provide a guide for the horizontal movement of the tray 32 and ensure the stable pulling of the holding frame 37. A tray 32 extending to the right side of the outer box 1 is fixedly installed between the two movable blocks 31. An installation plate 33 that fits against the right side of the outer box 1 is fixedly installed on the right side of the tray 32. A handle 34 is fixedly installed on the right side of the installation plate 33 to provide a force application point, making it easy for the user to pull out or push in the tray 32. A telescopic spring 35 that is fixedly connected to the right side of the inner wall of the outer box 1 is fixedly installed on the right side of the movable blocks 31 to realize the automatic reset of the tray 32 and reduce the operation steps. A limit frame 36 is fixedly installed on the top of the tray 32. A holding frame 37 located inside the limit frame 36 is movably installed on the top of the tray 32 for temporarily storing the sample after sampling.

[0032] A through hole is provided on the right side of the inner wall of the outer box 1. The mounting plate 33 is larger than the size of the through hole, and the two moving blocks 31 are symmetrically distributed front and back.

[0033] The culture mechanism 4 includes a mounting base 41. The mounting base 41 is fixedly installed on the inner bottom wall of the outer box 1 and fixedly connected to the left side of its inner wall. Two rotating shafts 42 are rotatably connected to the inner bottom wall of the mounting base 41 and extend to its top, connecting the mounting base 41 and the culture dish 43, so as to realize the rotation of the culture dish 43 and promote the uniform distribution of microorganisms. The culture dish 43 is movably installed on the top of the rotating shaft 42, carrying the culture medium and providing a growth environment for microorganisms. Its movable installation design makes it easy to pick up, put down and replace.

[0034] The mixing mechanism 5 includes a gear 51. The gear 51 is fixedly installed on the outer side of the rotating shaft 42, converting the linear motion of the rack 54 into the rotational motion of the rotating shaft 42. Support frames 52 are fixedly installed on both the front and rear sides of the inner wall of the mounting base 41. A movable frame 53 is slidably installed between the inner sides of the two support frames 52, converting the rotational motion of the cam 56 into the intermittent rotation of the gear 51. A rack 54 is fixedly installed at the bottom of the movable frame 53, and the rack 54 meshes with the rear side of the two gears 51. A servo motor 55 is fixedly installed on the inner bottom wall of the mounting base 41. A cam 56 is fixedly installed at the output shaft of the servo motor 55, converting the rotational motion into the reciprocating linear motion of the movable frame 53. A round rod 57 that is slidably connected to the movable frame 53 is fixedly installed on the top of the cam 56.

[0035] The inner side of the movable frame 53 has a slotted hole that matches the movement trajectory of the round rod 57. The inner side of the support frame 52 has a sliding hole whose size matches the movement trajectory of the movable frame 53. The top of the mounting base 41 has a mounting groove.

[0036] The moving component 6 includes a servo motor 61. The servo motor 61 is fixedly installed on the left side of the inner wall of the outer box 1. A threaded rod 62, which is rotatably connected to the right side of the inner wall of the outer box 1, is fixedly installed at the output shaft of the servo motor 61. A guide frame 63 located behind the threaded rod 62 is fixedly installed between the left and right sides of the inner wall of the outer box 1. A threaded block 64 is threadedly connected to the outer side of the threaded rod 62. A limiting block 65 extending to the inner side of the guide frame 63 and slidably connected to it is fixedly installed on the rear side of the threaded block 64, which is slidably connected to the guide frame 63 to enhance the stability of the threaded block 64.

[0037] The mounting mechanism 7 includes a rectangular block 701. The rectangular block 701 is fixedly mounted on the bottom of the threaded block 64. An electric push rod 702 is fixedly mounted on the bottom of the rectangular block 701, driving the box body 703 to move vertically, thus raising and lowering the sampling mechanism 8. The output end of the electric push rod 702 is fixedly mounted on the box body 703. A stabilizing frame 704 extending to the inner side of the box body 703 is fixedly mounted on the bottom of the box body 703, providing vertical guidance for the upright 81 and ensuring accurate contact between the sampling ring 83 and the food surface. A top frame 705 is fixedly mounted on the inner top wall of the box body 703. Two U-shaped frames 706, located on the left and right sides of the stabilizing frame 704 respectively, are fixedly mounted on the inner bottom wall of the box body 703. A support rod 707 is fixedly installed between the front and rear sides of the inner wall of body 706. A swing plate 708 is rotatably connected to the outer side of the support rod 707, driving the wedge block 710 to engage or disengage from the slot of the upright 81. A fixing spring 709 is fixedly installed on one side of the swing plate 708 and fixedly connected to the inner wall of the box body 703, keeping the wedge block 710 in a engaged state to prevent the upright 81 from accidentally falling off. Wedge blocks 710 are fixedly installed on opposite sides of the two swing plates 708. Push rods 711 extending to the outer side of the box body 703 are fixedly installed on opposite sides of the two swing plates 708. The user can push the push rods 711 to disengage the wedge block 710 from the slot, realizing the quick disassembly of the upright 81.

[0038] The sampling mechanism 8 includes a pole 81, which is movably installed inside the box body 703. One top end of the pole 81 extends to the inside of the top frame 705, and one bottom end of the pole 81 extends to the bottom of the box body 703. One end of the wedge block 710 extends to the inside of the pole 81 and engages with it. A connecting rod 82 is fixedly installed at the bottom of the pole 81, and a sampling ring 83 is fixedly installed at the bottom of the connecting rod 82. The ring ring directly contacts the food surface and scrapes off microbial samples. Its ring design can increase the sampling area and improve efficiency.

[0039] The upright 81 has slots on both the left and right sides, the size of which is adapted to the movement trajectory of the wedge block 710. The bottom of the wedge block 710 is inclined. The inner walls of the stabilizing frame 704 are open on both the upper and lower sides. The inner bottom wall of the box 703 has mounting holes that are adapted to the stabilizing frame 704.

[0040] When using the product, wipe the outer box 1, sampling ring 83, and petri dish 43 with 75% ethanol, sterilize by irradiating with ultraviolet light for 30 minutes, inject an appropriate amount of nutrient agar medium into the petri dish 43, pull the handle 34 to extend the tray 32, place the food to be sampled, release the handle 34 to reset the tray 32, adjust the position of the threaded block 64 with the servo motor 61 so that the sampling ring 83 is aligned with the sampling point on the food surface, press down the electric push rod 702, and the sampling ring 83 contacts the food surface and rotates to scrape microorganisms. After sampling, the electric push rod 702 is lifted to smear the sample on the sampling ring 83 onto the surface of the petri dish 43, start the servo motor 55 to drive the petri dish 43 to rotate, and promote the uniform distribution of microorganisms. If static culture is required, turn off the servo motor 55 and place the petri dish 43 in a 37°C constant temperature incubator for 24-48 hours. After the culture is completed, count the number of colonies and record the colony morphology, color, and other characteristics.

[0041] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0042] In summary, this portable food surface microbial sampling and culture device, by setting up a culture mechanism 4 and a mixing mechanism 5, uses a servo motor 55 as a power source to drive the cam 56 to rotate. The adjustable speed of the cam 56 allows control of the mixing frequency. When the cam 56 rotates, the round rod 57 slides within the slot of the moving frame 53, converting the rotational motion into the reciprocating linear motion of the moving frame 53. The moving frame 53 meshes with the gear 51 via a rack 54, converting the linear motion into the rotation of the gear 51. The gear 51 is fixed to the outside of the rotating shaft 42, and its transmission ratio ensures that the rotating shaft 42 and the gear 51 rotate synchronously, thereby driving the culture dish 43 to rotate. This achieves the purpose of having a mixing structure. The device also incorporates an installation mechanism 7 and a sampling mechanism. 8. First, lift the upright rod 81 upwards. Then, press the push rods 711 on both sides of the box body 703 with both hands simultaneously. The push rods 711 push the swing plate 708 inwards, compressing the fixing spring 709, causing the swing plate 708 to swing around the support rod 707 to both sides. The swing plate 708 drives the wedge block 710 to exit from the slot of the upright rod 81, releasing the vertical restriction on the upright rod 81. The upright rod 81 can then be taken out downwards, and the new sampling mechanism 8 can be installed. This achieves the purpose of replacing the sampling head, solving the problems of non-replaceable sampling heads, inability to select different sampling heads as needed, poor applicability, and lack of a mixing structure, resulting in uneven mixing of buffer solution and sample after sampling, which affects the culture effect.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] 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 food surface microbial sampling and culture device, comprising an outer box (1), a lid (2) movably mounted on the top of the outer box (1), a material holding assembly (3) extending to and connected to the inner side of the outer box (1) on the right side of the outer box (1), a moving assembly (6) between the left and right sides of the inner wall of the outer box (1), a handle (9) fixedly mounted on the top of the lid (2), and a carrying strap (10) fixedly mounted on the left side of the outer box (1) and fixedly connected to its right side, characterized in that: The inner bottom wall of the outer box (1) is provided with a culture mechanism (4), the inner side of the culture mechanism (4) is provided with a mixing mechanism (5), the bottom of the moving component (6) is provided with an installation mechanism (7), and the inner side of the installation mechanism (7) is movably installed with a sampling mechanism (8) extending to its bottom; the material holding component (3) includes a moving block (31), the front and rear sides of the inner wall of the outer box (1) are slidably installed with moving blocks (31), and a mechanism extending to the bottom of the outer box is fixedly installed between the two moving blocks (31). 1) The right side tray (32) is fixedly installed with an installation plate (33) that fits against the right side of the outer box (1). The right side of the installation plate (33) is fixedly installed with a handle (34). The right side of the moving block (31) is fixedly installed with a telescopic spring (35) that is fixedly connected to the right side of the inner wall of the outer box (1). The top of the tray (32) is fixedly installed with a limit frame (36). The top of the tray (32) is movably installed with a holding frame (37) located inside the limit frame (36).

2. The portable food surface microbial sampling and culture device according to claim 1, characterized in that: The culture mechanism (4) includes a mounting base (41). The inner bottom wall of the outer box (1) is fixedly mounted with the mounting base (41) and fixedly connected to the left side of its inner wall. The inner bottom wall of the mounting base (41) is rotatably connected with two rotating shafts (42) that extend to its top. The top of the rotating shaft (42) is movably mounted with a culture dish (43).

3. The portable food surface microbial sampling and culture device according to claim 2, characterized in that: The mixing mechanism (5) includes a gear (51). The gear (51) is fixedly installed on the outer side of the rotating shaft (42). Support frames (52) are fixedly installed on both the front and rear sides of the inner wall of the mounting base (41). A movable frame (53) is slidably installed between the inner sides of the two support frames (52). A rack (54) is fixedly installed at the bottom of the movable frame (53). The rack (54) meshes with the rear side of the two gears (51). A servo motor (55) is fixedly installed on the inner bottom wall of the mounting base (41). A cam (56) is fixedly installed at the output shaft of the servo motor (55). A round rod (57) that is slidably connected to the movable frame (53) is fixedly installed on the top of the cam (56).

4. The portable food surface microbial sampling and culture device according to claim 1, characterized in that: The moving component (6) includes a servo motor (61). The servo motor (61) is fixedly installed on the left side of the inner wall of the outer box (1). A threaded rod (62) that is rotatably connected to the right side of the inner wall of the outer box (1) is fixedly installed at the output shaft of the servo motor (61). A guide frame (63) located behind the threaded rod (62) is fixedly installed between the left and right sides of the inner wall of the outer box (1). A threaded block (64) is threadedly connected to the outer side of the threaded rod (62). A limiting block (65) that extends to the inner side of the guide frame (63) and is slidably connected to the threaded block (64) is fixedly installed on the rear side of the threaded block (64).

5. A portable food surface microbial sampling and culture device according to claim 4, characterized in that: The mounting mechanism (7) includes a rectangular block (701). The bottom of the threaded block (64) is fixedly mounted with the rectangular block (701). The bottom of the rectangular block (701) is fixedly mounted with an electric push rod (702). The output end of the electric push rod (702) is fixedly mounted with a housing (703). The bottom of the housing (703) is fixedly mounted with a stabilizing frame (704) extending to its inner side. The inner top wall of the housing (703) is fixedly mounted with a top frame (705). The inner bottom wall of the housing (703) is fixedly mounted with two stabilizing frames (704 and 705) located on the stabilizing frames (704 and 705). 4) The U-shaped frame (706) on the left and right sides, a support rod (707) is fixedly installed between the front and rear sides of the inner wall of the U-shaped frame (706), a swing plate (708) is rotatably connected to the outside of the support rod (707), a fixing spring (709) fixedly installed on one side of the swing plate (708) and fixedly connected to the inner wall of the box (703), a wedge block (710) is fixedly installed on the opposite side of the two swing plates (708), and a push rod (711) extending to the outside of the box (703) is fixedly installed on the opposite side of the two swing plates (708).

6. A portable food surface microbial sampling and culture device according to claim 5, characterized in that: The sampling mechanism (8) includes a pole (81) which is movably installed inside the box (703). One end of the top of the pole (81) extends to the inside of the top frame (705), and one end of the bottom of the pole (81) extends to the bottom of the box (703). One end of the wedge block (710) extends to the inside of the pole (81) and engages with it. A connecting rod (82) is fixedly installed at the bottom of the pole (81), and a sampling ring (83) is fixedly installed at the bottom of the connecting rod (82).

7. A portable food surface microbial sampling and culture device according to claim 6, characterized in that: The upright (81) has slots on both the left and right sides. The size of the slots is adapted to the movement trajectory of the wedge block (710). The bottom of the wedge block (710) is inclined. The inner walls of the stabilizing frame (704) are open on both the upper and lower sides. The inner bottom wall of the box (703) has mounting holes adapted to the stabilizing frame (704).

8. A portable food surface microbial sampling and culture device according to claim 3, characterized in that: The inner side of the movable frame (53) is provided with a slot that matches the movement trajectory of the round rod (57). The inner side of the support frame (52) is provided with a sliding hole. The size of the sliding hole matches the movement trajectory of the movable frame (53). The top of the mounting base (41) is provided with a mounting groove.

9. A portable food surface microbial sampling and culture device according to claim 1, characterized in that: The outer box (1) has a through hole on the right side of its inner wall. The mounting plate (33) is larger than the through hole, and the two moving blocks (31) are symmetrically distributed front and back.

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