Free ring bacteria taking device

Abstract

The utility model discloses a free ring take bacteria device belongs to bacterial culture utensil technical field, and this free ring take bacteria device includes frame, removes and sends mechanism, take bacteria arm, telescopic link and take bacteria ring, wherein, removes and sends mechanism to set up on the frame, take bacteria arm is connected with the transmission of removing and sending mechanism, telescopic link is along the up and down direction and is slidably arranged on take bacteria arm, take bacteria ring can detachably set up on telescopic link, and telescopic link can drive take bacteria ring to adapt to retract when take bacteria ring and culture medium abut. The utility model can strictly limit the pressure on the agar in a very small, safe range, thereby effectively avoid the agar layer being poked through or the culture medium surface being scratched because of the excessive pressure, not only protect the integrity of culture medium, also prevent the target colony from being embedded in the agar inside, provide reliable guarantee for the subsequent successful separation of pure colony.

Description

Technical Field

[0001] This utility model relates to the technical field of bacterial culture equipment, and in particular to a free-loop bacterial collection device. Background Technology

[0002] In clinical microbiology testing, food safety monitoring, and life science research, streak plating is a crucial basic operation for sample isolation and purification. Only by obtaining a single colony through this step can subsequent work such as strain identification and characterization be effectively carried out. The quality of this operation directly determines the accuracy of the test results and the reliability of the research conclusions. During streak plating, the loop is the most widely used core tool. Operators or machinery hold the loop and precisely streak the colony on the surface of the solid culture medium, thereby achieving the isolation and purification of microorganisms.

[0003] However, since the core component of solid culture media is the agar layer, its surface is fragile and its structure is loose, making it extremely intolerant to physical forces. When the equipment holds the sampling loop for streaking, a specific pressure must be maintained to ensure full contact between the sampling loop and the culture medium surface, thereby effectively scraping the colonies. However, due to limited pressure adjustment precision, if the preset pressure parameters are inappropriate, or if the actual pressure fluctuates due to wear of equipment parts or operational vibration, the sampling loop can easily puncture the agar layer or scratch the culture medium surface. This operational error not only disrupts the independent environment for colony growth, leading to cross-contamination of colonies in different areas, but may even cause the target colony to embed inside the agar, making it impossible to isolate effective pure colonies. Therefore, it is difficult to guarantee the consistency of experimental results across different batches, adversely affecting the accuracy of clinical diagnosis, the reliability of food safety monitoring, and the rigor of scientific research data. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a free-loop bacterial collection device that effectively prevents the surface of the agar medium from being punctured or scratched during bacterial collection and streaking, thereby ensuring the effectiveness of colony isolation and improving the accuracy of test results.

[0005] The free-loop bacterial collection device according to an embodiment of the present invention includes: a frame; a transfer mechanism disposed on the frame; a collection arm connected to the transfer mechanism in a transmission manner; a telescopic rod slidably disposed on the collection arm in a vertical direction; and a collection ring detachably disposed on the telescopic rod, wherein the telescopic rod can drive the collection ring to retract adaptively when the collection ring comes into contact with the culture medium.

[0006] It has at least the following beneficial effects: The transfer mechanism is mounted on a frame, and its output end is connected to a bacterial collection arm. The bacterial collection arm is fixedly mounted at the output end of the transfer mechanism in the vertical direction, and can move in three-dimensional space under the drive of the transfer mechanism. The bacterial collection arm is equipped with a telescopic rod that extends in the vertical direction and is slidably connected to the bacterial collection arm in the vertical direction. A bacterial collection ring is connected to the telescopic rod and is detachably mounted at the lower end of the telescopic rod. During operation, the transfer mechanism first drives the bacterial collection arm to move directly above the petri dish, and then the transfer mechanism drives the bacterial collection arm to move downward in a direction perpendicular to the petri dish. When the sampling loop contacts the agar surface in the petri dish, the loop and telescopic rod tend to come to rest under the support of the agar. At this point, the pressure applied to the agar surface comes only from the weight of the loop and the telescopic rod themselves. At the same time, the transfer mechanism continuously drives the sampling arm to move downward, causing the sampling arm to slide relative to the stationary telescopic rod. This strictly limits the pressure applied to the agar to a very small and safe range, effectively preventing the agar layer from being punctured or the surface of the culture medium from being scratched due to excessive pressure. This not only protects the integrity of the culture medium but also prevents the target colony from being embedded inside the agar, providing a reliable guarantee for the subsequent successful isolation of pure colonies.

[0007] According to some embodiments of the present invention, a detection mechanism is also included. The detection mechanism is mounted on the frame and electrically connected to the transfer mechanism. The detection mechanism is configured to control the transfer mechanism to stop descending, so as to avoid excessive pressure on the culture medium by the bacterial collection loop.

[0008] According to some embodiments of the present invention, the sampling arm is provided with an oscillation drive, which is configured to oscillate the sampling arm so that the microbial sample on the sampling ring is washed off when the sampling ring is immersed in the reagent.

[0009] According to some embodiments of the present invention, the detection mechanism includes: a photoelectric switch, fixedly mounted on the bacterial collection arm, the photoelectric switch having a photoelectric groove; a light-blocking column, fixedly mounted on the telescopic rod and located directly below the photoelectric groove, the movement path of the light-blocking column corresponding to the photoelectric groove, the light-blocking column being configured to trigger the photoelectric switch when entering the photoelectric groove, so that the transfer mechanism responds to the photoelectric switch to stop driving the bacterial collection arm downward.

[0010] According to some embodiments of the present invention, a light-blocking column is disposed through the bacteria-collecting arm, and a limiting window extending in the vertical direction is provided at the position of the bacteria-collecting arm corresponding to the movement path of the light-blocking column. The light-blocking column passes through the limiting window and extends outward in the radial direction of the bacteria-collecting arm. The limiting window is configured to limit the movement trajectory of the light-blocking column.

[0011] According to some embodiments of the present invention, a connecting seat is also included, the sampling ring is detachably mounted on the connecting seat, the connecting seat is detachably mounted on the telescopic rod, and the connecting seat is configured to connect the sampling ring and the telescopic rod.

[0012] According to some embodiments of the present invention, the connecting seat extends in the vertical direction and is provided with a first mounting groove and a second mounting groove. The opening of the first mounting groove is opposite to the opening of the second mounting groove. The inner diameter of the first mounting groove is adapted to the outer diameter of the scavenging ring rod body. The inner diameter of the second mounting groove is adapted to the outer diameter of the telescopic rod. The scavenging ring can be detachably inserted into the first mounting groove, and the telescopic rod can be detachably inserted into the second mounting groove.

[0013] According to some embodiments of this utility model, the cross-sectional area of ​​the lower end of the telescopic rod gradually increases from bottom to top, and the cross-sectional area of ​​the second mounting groove gradually increases from bottom to top.

[0014] According to some embodiments of the present invention, the oscillation drive includes an oscillation motor and an eccentric wheel disposed at the output end of the oscillation motor. The oscillation motor is fixedly disposed inside the bacterial collection arm, and the eccentric wheel abuts against the inner wall of the bacterial collection arm.

[0015] According to some embodiments of the present invention, the transfer mechanism includes: a first horizontal transfer component disposed on a frame, the first horizontal transfer component being configured to transfer the bacterial collection arm in a left-right direction; a second horizontal transfer component connected to the first horizontal transfer component, the second horizontal transfer component being configured to transfer the bacterial collection arm in a front-back direction; and a lifting component connected to the second horizontal transfer component, the lifting component being configured to transfer the bacterial collection arm in a vertical direction.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the free-loop bacterial collection device according to an embodiment of the present invention; Figure 2 for Figure 1 An explosion diagram in the image; Figure 3 for Figure 1 Schematic diagram of the structure of the eluted microbial sample; Figure 4 for Figure 2 A schematic diagram of the structure of the bacterial arm.

[0018] Icon labels: Rack 1; The transfer mechanism 2 includes a first horizontal transfer component 21, a second horizontal transfer component 22, and a lifting component 23. The components include: a mushroom-collecting arm 3, an oscillation drive 31, an oscillation motor 311, an eccentric wheel 312, and a limiting window 32. Telescopic pole 4; Take 5 bacterial loops; Testing mechanism 6, photoelectric switch 61, photoelectric slot 611, light-blocking column 62; Connector 7, first mounting slot 71, second mounting slot 72; Culture medium 8; Test tube 9. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 4 This utility model discloses a free-loop bacterial collection device, including a frame 1, a transfer mechanism 2, a collection arm 3, a telescopic rod 4, and a collection ring 5. The transfer mechanism 2 is mounted on the frame 1; the collection arm 3 is connected to the transfer mechanism 2 in a transmission manner; the telescopic rod 4 is slidably mounted on the collection arm 3 in the up-down direction; the collection ring 5 is detachably mounted on the telescopic rod 4, and when the collection ring 5 comes into contact with the culture medium 8, the telescopic rod 4 can drive the collection ring 5 to retract adaptively.

[0023] like Figure 1As shown, the transfer mechanism 2 is mounted on the frame 1, and its output end is connected to a bacterial collection arm 3. The bacterial collection arm 3 is fixedly mounted on the output end of the transfer mechanism 2 in the vertical direction. With the multi-directional drive of the transfer mechanism 2, the bacterial collection arm 3 can move in three-dimensional space. A telescopic rod 4 is provided at the lower end of the bacterial collection arm 3. The telescopic rod 4 extends in the vertical direction and is slidably connected to the bacterial collection arm 3 in the vertical direction. A bacterial collection ring 5 is connected to the telescopic rod 4 and is detachably mounted on the lower end of the telescopic rod 4. During operation, the transfer mechanism 2 first drives the bacterial collection arm 3 to move directly above the petri dish, and then the transfer mechanism 2 drives the bacterial collection arm 3 to move downward in a direction perpendicular to the petri dish. When the sampling loop 5 contacts the agar surface in the petri dish, the sampling loop 5 and the telescopic rod 4 tend to come to rest under the support of the agar. At this time, the pressure applied to the agar surface comes only from the gravity of the sampling loop 5 and the telescopic rod 4 themselves. At the same time, the transfer mechanism 2 continuously drives the sampling arm 3 to move downward, causing the sampling arm 3 to slide relative to the stationary telescopic rod 4. This strictly limits the pressure applied to the agar to a very small and safe range, effectively avoiding the agar layer from being punctured or the surface of the culture medium 8 from being scratched due to excessive pressure. This not only protects the integrity of the culture medium 8, but also prevents the target colony from being embedded inside the agar, providing a reliable guarantee for the subsequent successful isolation of pure colonies.

[0024] In some specific embodiments of this utility model, a detection mechanism 6 is also included. The detection mechanism 6 is disposed on the frame 1 and is electrically connected to the transfer mechanism 2. The detection mechanism 6 is configured to control the transfer mechanism 2 to stop descending so as to avoid excessive pressure on the culture medium 8 by the bacterial collection loop 5.

[0025] like Figure 1 , Figure 2 and Figure 4 As shown, the detection mechanism 6 is mounted on the sampling arm 3 and is communicatively connected to the transfer mechanism 2. Thus, when the sampling loop 5 contacts the agar surface, under the supporting force of the agar, the sampling loop 5 and the telescopic rod 4 tend to come to a stop, while the transfer mechanism 2 continues to drive the sampling arm 3 downwards, causing relative sliding between the sampling arm 3 and the telescopic rod 4. The detection mechanism 6 monitors this relative displacement in real time and immediately sends a signal to the transfer mechanism 2. Upon receiving the signal, the transfer mechanism 2 immediately stops descending, effectively preventing the sampling loop 5 from being pressed into the culture medium 8 due to excessive descent of the sampling arm 3. This fundamentally avoids the risk of the culture medium 8 surface being scratched or the target colony becoming embedded in the agar.

[0026] In some specific embodiments of this utility model, an oscillation drive 31 is provided inside the sampling arm 3. The oscillation drive 31 is configured to oscillate the sampling arm 3 so that the microbial sample on the sampling ring 5 is washed off when the sampling ring 5 is immersed in the reagent.

[0027] like Figure 3 and Figure 4 As shown, the sampling arm 3 has a first receiving groove extending vertically in the middle. An oscillation drive 31 is installed within the first receiving groove, which drives the entire sampling arm 3 to generate high-frequency micro-amplitude vibrations during operation. Specifically, after the transfer mechanism 2 drives the sampling ring 5 to complete the streaking sampling on the surface of the culture medium 8, the sampling arm 3, carrying the sampling ring 5, moves to the test tube 9 of the external station component used to receive the microbial sample in the next station, and descends to immerse the sampling ring 5 in the reagent within the test tube 9. At this time, the oscillation drive 31 is activated, driving the sampling arm 3 and the sampling ring 5 into a vibration state. It should be noted that high-frequency vibration effectively promotes the rapid and thorough elution of the microbial sample attached to the sampling ring 5 into the reagent, ensuring complete sample transfer. On the other hand, the vibration simultaneously stirs and mixes the reagent within the test tube 9, allowing the microbial sample to be evenly dispersed throughout the reagent system, laying a good foundation for subsequent detection or culture steps.

[0028] In some specific embodiments of this utility model, the detection mechanism 6 includes: a photoelectric switch 61, which is fixedly mounted on the bacterial collection arm 3, and the photoelectric switch 61 has a photoelectric groove 611; a light-blocking column 62, which is fixedly mounted on the telescopic rod 4 and located directly below the photoelectric groove 611, the movement path of the light-blocking column 62 corresponds to the photoelectric groove 611, and the light-blocking column 62 is configured to trigger the photoelectric switch 61 when it enters the photoelectric groove 611, so that the transfer mechanism 2 stops driving the bacterial collection arm 3 downward in response to the photoelectric switch 61.

[0029] like Figure 1 and Figure 4 As shown, a photoelectric switch 61 is fixedly mounted on the sampling arm 3, which has a photoelectric groove 611 extending vertically with its open end facing downwards. A light-blocking column 62 is fixedly mounted on the telescopic rod 4 and moves synchronously with the telescopic rod 4. Specifically, when the sampling ring 5 contacts the surface of the culture medium 8, the telescopic rod 4 slides upwards relative to the continuously descending sampling arm 3 under the reaction force, causing the light-blocking column 62 to rise synchronously. Since the photoelectric groove 611 of the photoelectric switch 61 is located on the upward path of the light-blocking column 62, the light-blocking column 62 immediately enters the groove and blocks its light path. The photoelectric switch 61 is triggered the instant the light path is blocked, immediately sending a stop signal to the transfer mechanism 2, thereby controlling the transfer mechanism 2 to stop descending. This photoelectric sensing mechanism constitutes a fast automatic feedback loop, which can accurately determine that the sampling ring 5 has contacted the culture medium 8 and completed the sampling action, thereby fundamentally preventing damage to the culture medium 8 or colony embedding due to excessive mechanical travel.

[0030] It should be noted that the core purpose of the detection mechanism 6 is to sense the relative displacement or force generated after the sampling loop 5 contacts the culture medium 8. Therefore, in addition to the photoelectric sensing method in the embodiment, those skilled in the art can easily conceive of other equivalent means, such as the magnetic induction of a magnet and a Hall element, the mechanical contact between a stop block and a micro switch, or even a force sensor that directly measures pressure, all of which fall within the protection scope of this utility model.

[0031] In some specific embodiments of this utility model, the light-blocking column 62 is disposed through the bacteria-collecting arm 3. The bacteria-collecting arm 3 is provided with a limiting window 32 extending in the vertical direction at the position corresponding to the movement path of the light-blocking column 62. The light-blocking column 62 passes through the limiting window 32 and extends outward in the radial direction of the bacteria-collecting arm 3. The limiting window 32 is configured to limit the movement trajectory of the light-blocking column 62.

[0032] like Figure 4 As shown, in this specific embodiment, the light-blocking column 62 adopts a symmetrical double-column design. Specifically, two horizontally extending light-blocking columns 62 are spaced apart in the vertical direction. Each light-blocking column 62 is composed of two cylindrical sections with external threads. The two cylindrical sections are coaxially screwed into the corresponding threaded holes on the telescopic rod 4 from the left and right sides, forming a reliable rigid connection. Correspondingly, a long strip-shaped limiting window 32 extending in the vertical direction is provided on the arm of the bacteria-collecting arm 3. The limiting window 32 is located on the movement trajectory of the light-blocking column 62. The cylinder passes through the limiting window 32 from the telescopic rod 4 and its end extends outward along the radial side of the bacteria-collecting arm 3. On the one hand, the threaded connection ensures a stable connection between the light-blocking column 62 and the telescopic rod 4, which can accurately transmit displacement; on the other hand, when the telescopic rod 4 slides up and down relative to the bacterial collection arm 3, the light-blocking column 62 moves smoothly within the limiting window 32, and the upper and lower ends of the limiting window 32 serve as mechanical limits, accurately defining and limiting the maximum stroke of the telescopic rod 4, which not only ensures the necessary buffer distance, but also avoids damage caused by excessive structural displacement.

[0033] In other embodiments of this invention, the structure of the light-blocking post 62 is not limited to a double-cylindrical threaded connection. It can be integrated with the telescopic rod 4, for example, by directly milling a radially protruding platform or wedge-shaped block onto the telescopic rod 4 as a light-blocking part. Alternatively, the light-blocking post 62 can also be designed as a one-piece component, fixed to the radial side of the telescopic rod 4 by snap-fit ​​or adhesive. These modified designs can all achieve the same function of moving synchronously with the telescopic rod 4 and effectively triggering the photoelectric switch 61.

[0034] In some specific embodiments of this utility model, a connecting seat 7 is also included. The bacterial collection ring 5 is detachably mounted on the connecting seat 7, and the connecting seat 7 is detachably mounted on the telescopic rod 4. The connecting seat 7 is configured to connect the bacterial collection ring 5 and the telescopic rod 4.

[0035] like Figure 4As shown, the connecting seat 7 connects the scavenging ring 5 and the telescopic rod 4. In some specific embodiments of this utility model, the connecting seat 7 has a first mounting groove 71 and a second mounting groove 72 at its upper and lower ends, respectively. The first mounting groove 71 and the second mounting groove 72 both extend in the vertical direction and are arranged opposite to each other. Specifically, the first mounting groove 71 at the lower end has its opening facing downwards, and its inner diameter is adapted to the outer diameter of the scavenging ring 5. The second mounting groove 72 at the upper end has its opening facing upwards, and its inner diameter is matched with the outer diameter of the telescopic rod 4. Thus, the scavenging ring 5 can be inserted into the first mounting groove 71 from below, and the end of the telescopic rod 4 can be inserted into the second mounting groove 72 from above, forming a convenient and stable detachable insertion relationship.

[0036] It should be noted that the connecting seat 7, as an independent transition component, provides a unified connection interface for the upper telescopic rod 4 and the lower sampling ring 5. This allows sampling rings 5 ​​of different specifications and uses to be quickly adapted to the telescopic rod 4 as long as their rod diameter conforms to the standard of the first mounting groove 71, greatly improving the modularity and interchangeability of the equipment. Furthermore, as detachable components, the connecting seat 7 and the sampling ring 5 can be disassembled together for thorough cleaning or used directly as disposable items, perfectly avoiding the risk of cross-contamination caused by sample residue.

[0037] In some specific embodiments of this utility model, the cross-sectional area of ​​the lower end of the telescopic rod 4 gradually increases from bottom to top, and the cross-sectional area of ​​the second mounting groove 72 gradually increases from bottom to top. Specifically, as shown in... Figure 4 As shown, to further improve the ease of assembly and the stability of the connection, the lower end of the telescopic rod 4 is designed as a tapered structure with its cross-sectional area gradually increasing from bottom to top. Correspondingly, the second mounting groove 72 on the connecting seat 7 is also machined into a matching inverted tapered groove. This tapered mating structure can automatically guide alignment during the insertion process, effectively eliminate mating gaps, and ultimately form a tight and wobbly connection between the components.

[0038] In some specific embodiments of this utility model, the oscillation drive 31 is composed of an oscillation motor 311 and an eccentric wheel 312 fixed on its output shaft. The oscillation motor 311 is stably installed in the second receiving groove opened inside the bacterial collection arm 3, and the eccentric wheel 312 abuts against the inner wall of the bacterial collection arm 3. Thus, when the eccentric wheel 312 rotates, the centrifugal force generated by the uneven mass distribution will periodically hit or push the inner wall of the bacterial collection arm 3, thereby converting the rotational motion of the motor into high-frequency micro-amplitude vibration of the entire bacterial collection arm 3.

[0039] In some specific embodiments of this utility model, the transfer mechanism 2 includes: a first horizontal transfer component 21, which is disposed on the frame 1 and is configured to transfer the bacterial collection arm 3 in the left-right direction; a second horizontal transfer component 22, which is connected to the first horizontal transfer component 21 and is configured to transfer the bacterial collection arm 3 in the front-back direction; and a lifting component 23, which is connected to the second horizontal transfer component 22 and is configured to transfer the bacterial collection arm 3 in the up-down direction.

[0040] In this specific embodiment, to meet the requirements of high precision and high reliability motion control, the first horizontal transfer component 21, the second horizontal transfer component 22, and the lifting component 23 preferably use high-precision ball screw linear modules or synchronous belt linear modules as drive actuators. These modules integrate servo motors or stepper motors and are equipped with position feedback devices such as grating rulers or encoders, collectively forming a closed-loop control system. Furthermore, their specific structures and working principles are well-known and mature technologies in this field, and therefore will not be elaborated further. It should be noted that any mechanism capable of precisely positioning and moving the bacterial collection arm 3 between the petri dish and the test tube 9 falls within the protection scope of this utility model for the transfer mechanism 2.

[0041] The following is based on Figures 1 to 4 The specific embodiments shown further illustrate this free-loop bacterial collection device.

[0042] A specific embodiment of this utility model provides a free-loop bacterial collection device, including a frame 1, a transfer mechanism 2, a collection arm 3, a telescopic rod 4, and a collection ring 5. The transfer mechanism 2 is mounted on the frame 1, and its output end is connected to the collection arm 3 via a transmission connection. The lower end of the collection arm 3 is provided with a telescopic rod 4 that can slide in the vertical direction, and a detachable collection ring 5 is installed at the bottom end of the telescopic rod 4. A light-blocking column 62 is fixedly mounted on the telescopic rod 4, and a photoelectric switch 61 is installed on the corresponding side wall of the collection arm 3. The path of the light-blocking column 62 moving with the telescopic rod 4 corresponds to the photoelectric slot 611 of the photoelectric switch 61. In addition, an oscillation drive component 31 is integrated inside the collection arm 3 to generate high-frequency micro-amplitude vibration during operation.

[0043] At the start of the operation, the transfer mechanism 2 first drives the sampling arm 3 to move above the petri dish, aligning the sampling loop 5 with the target colony. Then, the transfer mechanism 2 controls the sampling arm 3 to descend vertically, gradually bringing the sampling loop 5 closer to the surface of the culture medium 8. When the sampling loop 5 contacts the agar medium 8, the surface of the medium 8 exerts an upward supporting force on the sampling loop 5, keeping the sampling loop 5 and the connected telescopic rod 4 relatively stationary. Simultaneously, the transfer mechanism 2 continues to drive the main body of the sampling arm 3 downwards, causing the telescopic rod 4 to slide upwards relative to the sampling arm 3. During this process, the light-blocking column 62 fixed to the telescopic rod 4 moves upwards. When the light-blocking column 62 enters the sensing area of ​​the photoelectric switch 61 on the sampling arm 3 and blocks the light path, the photoelectric switch 61 is triggered, and the transfer mechanism 2 immediately stops its downward movement. Subsequently, the transfer mechanism 2 controls the sampling loop 5 to complete the streaking sampling operation on the surface of the culture medium 8, allowing the target microbial sample to adhere to the sampling loop 5. After sampling, the transfer mechanism 2 raises the sampling arm 3 and transfers it above the sample tube 9. Then, it lowers the sampling arm 3, immersing the sampling loop 5 in the reagent within the tube 9. At this time, the oscillation drive 31 integrated in the sampling arm 3 activates, causing the sampling arm 3 and sampling loop 5 to vibrate at high frequency and micro-amplitude. This ensures that the microbial sample attached to the sampling loop 5 is fully eluted into the reagent and that the reagent is uniformly mixed. After the elution process is complete, the oscillation drive 31 stops operating, and the transfer mechanism 2 raises the sampling arm 3 and removes it from the tube 9, returning it to the standby position for replacement or cleaning of the sampling loop 5, preparing for the next sampling operation.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A free-loop bacterial collection device, characterized in that, include: Rack (1); The transfer mechanism (2) is mounted on the frame (1); The bacterial collection arm (3) is connected to the transfer mechanism (2) via a transmission mechanism; The telescopic rod (4) is slidably mounted on the bacteria-collecting arm (3) in the up-down direction; The sampling loop (5) is detachably mounted on the telescopic rod (4). When the sampling loop (5) comes into contact with the culture medium (8), the telescopic rod (4) can drive the sampling loop (5) to retract adaptively.

2. The free-loop bacterial collection device according to claim 1, characterized in that, It also includes a detection mechanism (6), which is mounted on the frame (1) and electrically connected to the transfer mechanism (2). The detection mechanism (6) is configured to control the transfer mechanism (2) to stop descending in order to avoid the bacterial collection loop (5) from applying excessive pressure to the culture medium (8).

3. The free-loop bacterial collection device according to claim 2, characterized in that, The sampling arm (3) is provided with an oscillation drive (31), which is configured to oscillate the sampling arm (3) so that the microbial sample on the sampling ring (5) is washed off when the sampling ring (5) is immersed in the reagent.

4. The free-loop bacterial collection device according to claim 2, characterized in that, The testing organization (6) includes: A photoelectric switch (61) is fixedly mounted on the bacterial collection arm (3), and the photoelectric switch (61) has a photoelectric groove (611). A light-blocking column (62) is fixedly installed on the telescopic rod (4) and located directly below the photoelectric groove (611). The moving path of the light-blocking column (62) corresponds to that of the photoelectric groove (611). The light-blocking column (62) is configured to trigger the photoelectric switch (61) when it enters the photoelectric groove (611), so that the transfer mechanism (2) stops driving the bacteria-collecting arm (3) downward in response to the photoelectric switch (61).

5. The free-loop bacterial collection device according to claim 4, characterized in that, The light-blocking column (62) is disposed through the bacteria-collecting arm (3). The bacteria-collecting arm (3) has a limiting window (32) extending in the vertical direction at the position corresponding to the movement path of the light-blocking column (62). The light-blocking column (62) passes through the limiting window (32) and extends outward in the radial direction of the bacteria-collecting arm (3). The limiting window (32) is configured to limit the movement trajectory of the light-blocking column (62).

6. The free-loop bacterial collection device according to claim 5, characterized in that, It also includes a connecting seat (7), on which the scavenging ring (5) is detachably mounted, and on which the connecting seat (7) is detachably mounted, and the connecting seat (7) is configured to connect the scavenging ring (5) and the telescopic rod (4).

7. The free-loop bacterial collection device according to claim 6, characterized in that, The connecting seat (7) extends in the vertical direction and is provided with a first mounting groove (71) and a second mounting groove (72). The opening of the first mounting groove (71) is opposite to the opening of the second mounting groove (72). The inner diameter of the first mounting groove (71) is adapted to the outer diameter of the rod of the scavenging ring (5). The inner diameter of the second mounting groove (72) is adapted to the outer diameter of the telescopic rod (4). The scavenging ring (5) can be detachably inserted into the first mounting groove (71), and the telescopic rod (4) can be detachably inserted into the second mounting groove (72).

8. The free-loop bacterial collection device according to claim 7, characterized in that, The cross-sectional area of ​​the lower end of the telescopic rod (4) gradually increases from bottom to top, and the cross-sectional area of ​​the second mounting groove (72) gradually increases from bottom to top.

9. The free-loop bacterial collection device according to claim 3, characterized in that, The oscillation drive (31) includes an oscillation motor (311) and an eccentric wheel (312) disposed at the output end of the oscillation motor (311). The oscillation motor (311) is fixedly disposed inside the bacterial collection arm (3), and the eccentric wheel (312) abuts against the inner wall of the bacterial collection arm (3).

10. The free-loop bacterial collection device according to any one of claims 1 to 9, characterized in that, The transfer mechanism (2) includes: A first horizontal transfer assembly (21) is disposed on the frame (1), and the first horizontal transfer assembly (21) is configured to transfer the bacterial collection arm (3) in the left-right direction. A second horizontal transfer component (22) is connected to the first horizontal transfer component (21), and the second horizontal transfer component (22) is configured to transfer the bacterial collection arm (3) in the front-back direction. A lifting assembly (23) is connected to the second horizontal transfer assembly (22), the lifting assembly (23) being configured to transfer the bacterial collection arm (3) in the vertical direction.

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