Small biological sample extraction device

Abstract

The invention relates to a small biological sample extraction device which comprises extraction equipment for extracting a biological sample and cleaning equipment which is connected to one side of the extraction equipment and is used for cleaning a test tube rack, the cleaning equipment comprises a cleaning unit for cleaning the surface of the test tube rack, a storage unit for sterilizing, drying and storing the cleaned test tube rack, and a supply unit for supplying a cleaning solution required in the cleaning process; the cleaning equipment is provided with at least three cavities, and the cleaning unit, the storage unit and the supply unit are located in one of the cavities respectively. Before a test tube containing blood is placed on the test tube rack, the test tube rack is cleaned through the device, so that the interior of the test tube rack is not prone to being polluted when the test tube rack enters extraction equipment, and experimental data are more accurate.

Description

Technical Field

[0001] The invention relates to the field of biological detection, and in particular to a small biological sample extraction device. Background Art

[0002] Biological sample extraction devices are important tools used in biology, medicine and other fields to extract specific components (such as DNA, RNA, protein, etc.) from biological samples. These devices are usually efficient, precise and automated, which can greatly improve experimental efficiency and the accuracy of results.

[0003] During the experimental process of extracting specific components from biological samples by means of a biological sample extraction device, a dust-free and sterile environment is required. In the prior art, the biological sample extraction device usually only includes an extraction device, which can automatically complete multiple steps such as sample processing, lysis, and purification. During the extraction process, the experimenter will collect the blood used to extract the characteristic components and put it in a test tube, then place multiple test tubes on a test tube rack, and finally put the test tube rack and the test tube into the extraction device at the same time for an automated extraction process. Before the experiment, the test tube is usually strictly disinfected after each use, and the test tube rack is repeatedly used with only simple treatment. When the test tube rack is placed in the extraction device, the germs and dust particles carried on the test tube rack may contaminate the inside of the extraction device. Summary of the invention

[0004] In order to prevent the pathogens and dust particles carried on the test tube rack from contaminating the inside of the extraction device during the experiment of extracting specific components from the biological sample by the biological sample extraction device, the present invention provides a small biological sample extraction device.

[0005] The present invention provides a small biological sample extraction device, which adopts the following technical solution:

[0006] A small biological sample extraction device includes an extraction device for extracting biological samples, and also includes a cleaning device connected to one side of the extraction device and used to clean a test tube rack, wherein the cleaning device includes:

[0007] A cleaning unit, used for cleaning the surface of the test tube rack;

[0008] A storage unit, used for disinfecting, drying and storing the cleaned test tube racks;

[0009] A supply unit for replenishing the cleaning solution required for the cleaning process;

[0010] The cleaning device has at least three chambers, and the cleaning unit, the storage unit and the supply unit are respectively located in one of the chambers.

[0011] By adopting the above technical solution, before using the test tube rack to place the test tube containing blood, the test tube rack is placed in the cleaning unit, and the cleaning unit can clean the test tube rack. After cleaning, the test tube rack can be sent to the storage unit, and the storage unit can disinfect, dry and store the test tube rack. After completing the above steps, the surface of the test tube rack is relatively clean, so that it is not easy to contaminate the inside of the test tube rack when entering the extraction equipment, so that the experimental data is more accurate.

[0012] Optionally, the cleaning unit is provided with a conveying mechanism for placing the test tube rack and driving the test tube rack into and out of the cleaning unit, and a cleaning mechanism for cleaning the test tube rack;

[0013] The cleaning unit is provided with a warehouse entrance, and the warehouse entrance is vertically slidably provided with a warehouse door;

[0014] The conveying mechanism includes a moving assembly and a driving assembly; the moving assembly includes a conveying guide rail provided on the bottom surface of the cleaning unit and arranged along the depth direction of the bin entrance, a sliding seat slidably mounted on the conveying guide rail, and a conveying platform mounted on the top of the sliding seat;

[0015] The top of the conveying platform has a placement area for positioning and placing a test tube rack; the driving assembly includes a driving rail arranged on the bottom surface of the cleaning unit and parallel to the conveying rail, a driving seat sliding on the driving rail, a connecting rope connecting the driving seat and the chamber door, and a reset spring arranged on the driving seat and driving the driving seat to reset so as to return the conveying platform to the cleaning unit;

[0016] One side of the conveying platform is provided with a driven rack, and one side of the driving seat is provided with a driving rack, and the driven rack is meshed with the driving rack;

[0017] The driving assembly has a starting position and an ending position; when the driving seat is at the starting position, the bin door is in an open state and the return spring is in a compressed state; when the driving seat is at the ending position, the bin door is in a closed state and the return spring is in a return state.

[0018] By adopting the above technical solution, when the door is opened, the door can drive the drive seat to move to the starting position, at which time the conveyor can extend out of the door, and the operator can place the test tube rack on the conveyor. When the door is closed, the drive seat is driven by the reset spring to return to the end position, at which time the conveyor can be synchronously moved into the cleaning chamber and cleaned, which is more convenient.

[0019] Optionally, the bottom surface of the cleaning unit is tilted downward toward the direction close to the storage port, and the conveying mechanism is parallel to the bottom surface of the cleaning unit;

[0020] The conveying platform includes a base plate, a receiving plate located above the base plate and used for placing the test tube rack, and a connecting spring located between the base plate and the receiving plate and connecting the two; the top of the receiving plate is horizontally arranged; the driven rack is located on one side of the receiving plate; when the test tube rack is on the receiving plate, the driven rack is meshed with the driving rack;

[0021] A locking piece for locking the driving seat is vertically slidably provided on the driving guide rail, and the locking piece has a locking groove; the driving seat has a locking hook, and the locking hook is engaged with the locking groove when the driving seat is in the starting position;

[0022] The locking member has an unlocking portion, and when the test tube rack is on the receiving plate, the unlocking portion abuts against the receiving plate to unlock the driving seat.

[0023] By adopting the above technical solution, when the warehouse door is opened, the drive seat can move to the starting position, and the conveyor table can move to the placement position under the action of gravity. At the placement position, the operator can place the test tube rack on the conveyor table. When the test tube rack is on the conveyor table, the receiving plate moves downward under the action of the gravity of the test tube rack, so that the driven rack engages with the driving rack. When the warehouse door is closed, the drive seat can move from the starting position to the ending position under the action of the reset spring, and the conveyor table can move synchronously to the cleaning position. After cleaning, the test tube rack can be pushed out of the conveyor table. At this time, the conveyor table can rise again so that the driven rack is disconnected from the driving rack. The conveyor table can move along the inclined bottom surface to the placement position direction under the action of gravity, and the drive seat will only move when the warehouse door is opened. In the above process, the test tube rack cannot be electrically driven in and out of the cleaning unit, which is relatively simple.

[0024] Furthermore, the drive seat can be locked and positioned by the locking member at the starting position, so that the driven rack can be easily engaged with the driving rack. When the test tube rack is placed on the conveying table, the receiving plate can drive the locking member to unlock, so that the drive seat drives the test tube rack to move from the cleaning unit, which is more convenient.

[0025] Optionally, the cleaning mechanism includes a liquid spraying assembly for spraying liquid, a support frame, a sponge frame that is lifted and slid on the support frame, a brush head assembly fixed to the support frame, and a lifting drive member that drives the support frame to lift and lower;

[0026] The sponge rack comprises a frame body and an annular liquid-absorbing cotton, the frame body array is provided with through holes corresponding to and facing the placement openings of the test tube rack, and the annular liquid-absorbing cotton is clamped in the through holes; the top of the frame body is provided with a liquid inlet groove and a liquid guide groove, and the liquid guide groove communicates with the through holes and the liquid inlet groove;

[0027] The brush head assembly has brush heads arranged in an array, and the brush heads correspond to and face the placement openings of the test tube rack one by one; the diameter of the brush heads is larger than the inner diameter of the annular liquid-absorbing cotton; when the conveying platform is in the cleaning unit, the lifting drive member drives the support frame to descend so that the sponge frame covers the top of the test tube rack, and the brush head is passed through the annular liquid-absorbing cotton to scrub the inner wall of the placement opening of the test tube rack;

[0028] The liquid spraying assembly comprises a liquid inlet main pipe, a spray pipe connected to the liquid inlet main pipe and used for spraying liquid, and a liquid adding pipe connected to the liquid inlet main pipe and facing the liquid inlet tank and used for adding liquid to the liquid inlet tank.

[0029] By adopting the above technical solution, when the brush head enters the placement port of the test tube rack, it can squeeze the annular liquid-absorbing cotton, so that the liquid in the annular liquid-absorbing cotton is squeezed out and flows downward along the inner wall of the placement port, so that the inner wall of the placement port is moistened, so that the brush head can brush the inner wall of the placement port, which is more convenient.

[0030] Optionally, the brush head has a rod portion, and a clamping block is arranged on the top of the rod portion; the brush head assembly also includes a brush head frame, and the brush head frame is clamped to the support frame; the brush head frame is provided with a mounting through hole for the rod portion and the clamping block to pass through, and the top of the brush head frame is provided with a clamping groove for the clamping block to rotatably clamp and communicate with the mounting through hole; the top of the brush head frame is slidably provided with a brush head cover plate for pressing the clamping block tightly into the clamping groove.

[0031] By adopting the above technical solution, when the brush head is used many times and needs to be replaced, the brush head cover is opened and the brush head that needs to be replaced is rotated in a targeted manner so that the snap-in block is withdrawn from the snap-in groove, and then the brush head is withdrawn from the mounting through hole, making replacement easier.

[0032] Optionally, the storage unit is adjacent to the cleaning unit, and a partition door is provided between the storage unit and the cleaning unit; the cleaning unit is provided with a pushing component for pushing the cleaned test tube rack from the cleaning unit into the storage unit; the storage unit is rotatably provided with a box flap for covering the storage unit; an ultraviolet disinfection lamp is provided in the storage unit.

[0033] By adopting the above technical solution, the test tube rack can enter the storage unit for storage after completing cleaning in the cleaning unit, the air intake fan in the storage unit can blow air to the test tube rack, and the ultraviolet disinfection lamp can disinfect the test tube rack, thereby further making the test tube rack cleaner.

[0034] Optionally, the cleaning device is provided with interconnected water vapor layers at the bottom of the cleaning unit and the storage unit; the bottom surface of the cleaning unit and the bottom surface of the storage unit are both provided with water leakage holes that penetrate the water vapor layer; and a water collection device for receiving liquid in the water vapor layer is provided on one side of the extraction device;

[0035] An air intake fan is disposed on the top of the storage unit, and an exhaust fan is disposed on the top of the cleaning unit;

[0036] A tray is rotatably provided on the bottom surface of the storage unit, and rotating blades are circumferentially provided on the bottom surface of the tray. The storage unit is provided with air holes circumferentially on the bottom of the tray, and the air holes are communicated with the water vapor layer.

[0037] By adopting the above technical solution, the intake fan can take in air and the exhaust fan can exhaust air. The two can cooperate to take away the moisture in the storage unit and the cleaning unit to accelerate drying; and when the wind passes through the moisture layer, it can push the liquid in the moisture layer toward the water collection device, so that the moisture layer dries faster and is not easy to breed bacteria.

[0038] Furthermore, the tray in the storage unit can rotate under the action of wind, and the liquid on the surface of the test tube rack is thrown out when the tray rotates, thereby accelerating the drying of the test tube rack.

[0039] Optionally, the supply unit is provided with a mixing box assembly, a pure alcohol tank, a liquid pump connecting the mixing box assembly and the pure alcohol tank and used to pump pure alcohol into the mixing box assembly, and a storage box connected to the mixing box assembly for storing the mixed alcohol solution; the storage box is connected to the liquid inlet main pipe;

[0040] The mixing box assembly includes a mixing box body, a stirring motor disposed on the top of the mixing box body, a stirring shaft connected to the stirring motor, and a paddle connected to the bottom of the stirring shaft and used to stir the liquid in the mixing box body;

[0041] The stirring shaft is provided with an infusion channel penetrating through the bottom surface in the circumferential direction inside, and the sealing sleeve outside the stirring shaft is provided with a liquid inlet ring, and the liquid inlet ring is provided with a water inlet channel for water inlet and an alcohol channel for pure alcohol inlet, which are connected with the infusion channel, and the alcohol channel is connected with the liquid pump;

[0042] The inner bottom surface of the mixing box is provided with a circulation outer hole in the circumferential direction, and a circulation inner hole is provided at the center of the inner bottom surface, and the mixing box is provided with a circulation water pump for sucking liquid from the circulation outer hole and ejecting liquid from the circulation inner hole;

[0043] A guide piece is provided at the bottom of the stirring shaft and the guide piece is directly opposite to the circulation inner hole. A guide slope is provided in the circumferential direction of the bottom surface of the guide piece, and the guide slope is inclined toward the direction of the paddle.

[0044] By adopting the above technical solution, the circulating water pump can extract liquid from the circulating outer hole and spray the liquid from the circulating inner hole. The solutions in the outer and inner circles of the bottom surface of the mixing box can be circulated and mixed, making the mixing easier and more uniform. In addition, by providing a guide, the liquid sprayed from the circulating inner hole is not easy to collide with and hinder the liquid flowing out of the stirring shaft. The liquid sprayed from the circulating inner hole can be sprayed toward the paddle along the guide liquid surface, so that the liquid is stirred by the paddle.

[0045] Optionally, a volatilization hole is provided on the top of the mixing box, an air outlet hole is provided between the supply unit and the storage unit, and an air suction device for sucking air from the volatilization hole and blowing air from the air outlet hole is connected between the volatilization hole and the air outlet.

[0046] By adopting the above technical solution, alcohol volatilization is easily generated during stirring in the mixing box. By collecting the volatilized alcohol and sending it to the storage unit, the evolved alcohol gas can be mixed with the wet surface of the test tube rack again, thereby further cleaning the test tube rack, making the test tube rack cleaner and improving the utilization rate of alcohol.

[0047] Optionally, the supply unit is provided with a charging bin door on one side of the pure alcohol tank; the charging bin door is provided with a lock portion that is rotated by a key, and the lock portion has a hook portion;

[0048] The side wall of the pure alcohol tank has a door lock channel, the bottom of the door lock channel is connected to the inside of the pure alcohol tank, and the door lock channel has a locking hole for the hook portion to be inserted; a lifting locking member that rises and falls with the liquid level is sealed in the door lock channel, and when the liquid in the pure alcohol tank is sufficient, the lifting locking member is engaged with the hook portion;

[0049] An exit plate and an exit spring are also horizontally slidably arranged in the door lock channel. The exit plate abuts against the hook portion, and the exit spring abuts against the exit plate and has a tendency to drive the hook portion to exit the locking hole.

[0050] By adopting the above technical solution, the opening and closing of the charging bin door is linked to the liquid level of the pure alcohol tank. When the pure alcohol tank has sufficient alcohol, the charging bin door is locked due to the cooperation between the hook part and the lifting locking part. When the pure alcohol tank has insufficient alcohol, the liquid level in the door lock channel drops to cause the lifting locking part, thereby disconnecting the hook part from the lifting locking part. At this time, the charging bin door can be opened to remind the operator that the pure alcohol tank needs to be charged, which is more convenient.

[0051] In summary, the present application includes at least one of the following beneficial technical effects:

[0052] 1. A small biological sample extraction device, by arranging a cleaning device on one side of the extraction device, the cleaning device can clean, disinfect and dry the test tube rack, so that the surface of the test tube rack is relatively clean, so that it is not easy to pollute the inside of the test tube rack when entering the extraction device, so as to make the experimental data more accurate;

[0053] 2. By setting a circulating water pump, the solutions in the outer and inner circles of the bottom surface of the mixing box can be circulated and mixed, so that the mixing is easy and more uniform; and by setting a guide piece, the liquid sprayed from the inner circulation hole is not easy to collide and hinder with the liquid flowing out of the stirring shaft, and the liquid sprayed from the inner circulation hole can be sprayed toward the blade along the guide liquid surface, so that the liquid is stirred by the blade;

[0054] 3. By collecting the alcohol gas volatilized during stirring in the mixing box and sending it to the storage unit, the evolved alcohol gas can be mixed with the wet surface of the test tube rack again, thereby further cleaning the test tube rack, making the test tube rack cleaner and improving the utilization rate of alcohol. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the overall structure of a small biological sample extraction device according to an embodiment of the present invention;

[0056] Figure 2 is a schematic diagram of the internal structure of an embodiment of the present invention after the top is opened;

[0057] Figure 3 is a side sectional view of a cleaning unit according to an embodiment of the present invention;

[0058] Figure 4 is an exploded view of a conveying mechanism according to an embodiment of the present invention;

[0059] Figure 5 yes Figure 4 A partial enlarged view of the middle A;

[0060] Figure 6 is a schematic structural diagram of a sponge rack according to an embodiment of the present invention;

[0061] Figure 7 is a structural schematic diagram of a brush head assembly according to an embodiment of the present invention;

[0062] Figure 8 is a front cross-sectional view of a cleaning unit according to an embodiment of the present invention;

[0063] Fig. 9 is a cross-sectional view of a mixing box assembly according to an embodiment of the present invention;

[0064] Fig.10 yes Fig. 9 A partial enlarged view of point B in the middle;

[0065] Fig.11 It is a structural schematic diagram of the linkage structure of the pure alcohol tank and the charging bin door according to an embodiment of the present invention.

[0066] The parts indicated by the numbers in the above figures are as follows: 1. Extraction equipment; 2. Cleaning equipment; 21. Cleaning unit; 211. Inlet; 212. Door; 213. Exhaust fan; 22. Storage unit; 221. Box cover; 222. Ultraviolet disinfection lamp; 223. Inlet fan; 224. Support tray; 225. Rotating blades; 226. Air hole; 23. Supply unit; 231. Mixing box assembly; 2311. Mixing box; 23111. Circulation outer hole; 23112. Circulation inner hole; 23113. Volatilization hole; 2312. Stirring motor; 2313. Stirring shaft; 23131. Delivery liquid channel; 2314, paddle; 2315, liquid inlet ring; 23151, water inlet channel; 23152, alcohol channel; 2316, circulating water pump; 2317, guide; 23171, guide slope; 2318, partition; 232, pure alcohol tank; 2321, door lock channel; 2322, lifting locking member; 2323, auxiliary spring; 2324, locking hole; 2325, exit plate; 2326, exit spring; 233, liquid pump; 234, storage box; 24, partition door; 25, water vapor layer; 26, water leakage hole; 27, air outlet; 28, suction device; 29, charging bin door; 291, lock part ; 292, hook portion; 3, conveying mechanism; 31, moving assembly; 311, conveying guide rail; 312, sliding seat; 313, conveying platform; 3131, base plate; 3132, receiving plate; 3133, connecting spring; 3134, guide rod; 3135, placement area; 3136, driven rack; 3137, retraction groove; 314, retraction device; 3141, retraction hook portion; 32, driving assembly; 321, driving guide rail; 322, driving seat; 3221, locking hook; 323, connecting rope; 324, return spring; 325, driving rack; 326, locking member; 3261, locking groove; 3262 , unlocking part; 4, cleaning mechanism; 41, supporting frame; 42, sponge frame; 421, frame body; 422, annular liquid absorbent cotton; 423, sliding rod; 424, through hole; 425, liquid inlet groove; 426, liquid guide groove; 43, brush head assembly; 431, brush head frame; 4311, mounting through hole; 4312, clamping groove; 432, brush head; 4321, rod; 4322, clamping block; 433, brush head cover; 44, lifting drive member; 45, spray assembly; 451, liquid inlet main pipe; 452, spray pipe; 453, liquid adding pipe; 5, pushing assembly; 51, pushing plate; 52, pushing source; 6, water collecting device. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0068] Reference Figure 1 A small biological sample extraction device includes an extraction device 1 and a cleaning device 2. The cleaning device 2 is arranged on one side of the extraction device 1 and is integrally connected to the extraction device 1. The extraction device 1 is used to receive a test tube and a test tube rack containing blood and process the blood to extract a biological sample. The cleaning device 2 is used to pre-clean the test tube rack to ensure that the test tube rack is relatively clean when entering the extraction device 1.

[0069] The extraction device 1 is prior art and will not be described in detail here.

[0070] Reference Figure 1 and Figure 2 The cleaning device 2 includes a cleaning unit 21 for cleaning the test tube rack, a storage unit 22 for storing the test tube rack, and a supply unit 23 for replenishing the cleaning solution required for the cleaning process. In this embodiment, the cleaning device 2 has three chambers, corresponding to the cleaning unit 21, the storage unit 22, and the supply unit 23. The cleaning unit 21 is arranged adjacent to the storage unit 22, and the cleaning unit 21 and the storage unit 22 are both adjacent to the supply unit 23. The number of chambers of the cleaning unit 21 can also be greater than three, and the excess chambers exceeding three can be used for other purposes, which will not be repeated here.

[0071] The cleaning unit 21 is provided with an inlet 211 for the test tube rack to enter, and a door 212 is vertically slidably provided at the inlet 211. In this embodiment, the door 212 can be opened and closed manually by an operator, or can be opened and closed automatically by the device.

[0072] The inner bottom surface of the cleaning unit 21 is inclined, and is inclined downward toward the direction close to the storage opening 211 .

[0073] Reference Figure 2 and Figure 3 A conveying mechanism 3 and a cleaning mechanism 4 are provided in the cleaning unit 21. The conveying mechanism 3 is used to convey the test tube rack from the inlet 211 into the cleaning unit 21, and the cleaning mechanism 4 is used to clean the test tube rack conveyed into the cleaning unit 21.

[0074] Reference Figure 3 and Figure 4, the conveying mechanism 3 is arranged parallel to the bottom surface of the cleaning unit 21. The conveying mechanism 3 includes a moving assembly 31 and a driving assembly 32. The moving assembly 31 includes a conveying rail 311, a sliding seat 312 and a conveying platform 313. There are two conveying rails 311, which are arranged in parallel, and the conveying rails 311 are arranged along the depth direction of the warehouse entrance 211. The sliding seat 312 is slidably installed on the conveying rail 311 and can slide along the length direction of the conveying rail 311. There are balls in the sliding seat 312, so that the friction force of the sliding seat 312 is small when sliding on the conveying rail 311. The conveying platform 313 is used for the installation and placement of the test tube rack. The conveying platform 313 is fixedly installed on the sliding seat 312 by screws, so that the conveying platform 313 can slide on the conveying rail 311 with the sliding seat 312.

[0075] The conveying platform 313 includes a base plate 3131, a receiving plate 3132 and a connecting spring 3133. The base plate 3131 is connected to the sliding seat 312, the receiving plate 3132 is located above the base plate 3131, and the connecting spring 3133 is located between the base plate 3131 and the receiving plate 3132 and connects the two. Guide rods 3134 are provided at the four corners of the base plate 3131, and the guide rods 3134 are penetrated through the receiving plate 3132. The connecting spring 3133 is sleeved on the guide rod 3134, one end of which is connected to the top of the base plate 3131, and the other end is connected to the bottom of the receiving plate 3132. When the test tube rack is placed on the receiving plate 3132, the receiving plate 3132 can be lifted and lowered along the guide rod 3134 under the gravity of the test tube rack, and compress the connecting spring 3133. Since the test tube rack can be raised and lowered on the receiving plate 3132 , in actual application, a pressure sensor can be arranged between the base plate 3131 and the receiving plate 3132 so that the test tube rack can be weighed when placed on the receiving plate 3132 , thereby detecting the test tube rack sent to the cleaning unit 21 .

[0076] The receiving plate 3132 is a triangular prism, the bottom surface of which is parallel to the inner bottom surface of the cleaning unit 21, and the top surface of which is horizontally arranged, so that the test tube rack can be horizontally placed on the top of the receiving plate 3132. The top of the receiving plate 3132 has a placement area 3135 for positioning and placing the test tube rack, so that the operator can accurately place the test tube rack on the receiving plate 3132 at the same position every time.

[0077] The conveying mechanism 3 has a placing station and a cleaning station. When the conveying mechanism 3 is in the placing station, the sliding seat 312 moves to one end of the conveying rail 311 close to the bin inlet 211. Since both ends of the conveying rail 311 have a limiting function, the sliding seat 312 can stop at the end of the conveying rail 311, and at this time, a part of the conveying platform 313 extends out of the bin inlet 211. When the conveying mechanism 3 is in the cleaning station, the sliding seat 312 moves to one end of the conveying rail 311 near the raw material bin inlet 211, and at this time, the conveying platform 313 is completely located in the cleaning unit 21.

[0078] The driving assembly 32 includes a driving rail 321, a driving seat 322, a connecting rope 323 and a return spring 324. The driving rail 321 is parallel to the inner bottom surface of the cleaning unit 21 and parallel to the conveying rail 311. The driving seat 322 is slidably mounted on the driving rail 321. The connecting rope 323 connects the driving seat 322 and the warehouse door 212. When the warehouse door 212 is opened, the warehouse door 212 can drive the driving seat 322 to move synchronously on the driving rail 321. The return spring 324 is sleeved on the connecting rope 323, and one end of the return spring 324 abuts against one end of the driving seat 322 close to the warehouse entrance 211, and the other end abuts against the inner wall of the cleaning unit 21. When the warehouse door 212 is opened, the driving seat 322 drives the return spring 324 to be compressed, and when the warehouse door 212 is closed, the return spring 324 releases pressure to drive the driving seat 322 to move in a direction away from the warehouse entrance 211.

[0079] The driving assembly 32 has a starting position and a termination position. When the driving assembly 32 is at the starting position, the door 212 is in an open state, and the moving assembly 31 is also in a placement position. When the driving assembly 32 is at the termination position, the door 212 is in a closed state, and the moving assembly 31 is in a cleaning position.

[0080] Both sides of the receiving plate 3132 are provided with driven racks 3136, and the driving seats 322 on both sides of the moving assembly 31 are provided with driving racks 325. When no test tube rack is placed on the receiving plate 3132, the driven racks 3136 are not meshed with the driving racks 325.

[0081] Reference Figure 4 and Figure 5 The driving seat 322 is provided with a locking hook 3221, and the locking hook 3221 is located at one end of the driving seat 322 near the warehouse entrance 211. A locking member 326 is provided on the driving guide rail 321 for lifting and sliding movement, and the bottom of the locking member 326 is driven by a spring. The locking member 326 has a locking groove 3261, and the locking groove 3261 can be engaged with the locking hook 3221. The locking member 326 also has an unlocking portion 3262, and the unlocking portion 3262 is located at the bottom of the receiving plate 3132.

[0082] When the driving seat 322 moves to the starting position, the locking hook 3221 is engaged with the locking groove 3261 to fix the driving seat 322 at the starting position, and the reset spring 324 is compressed and in a compressed state. When the conveying platform 313 is in the placement position and the operator places the test tube rack on the conveying platform 313, the test tube rack can drive the receiving plate 3132 to descend under the action of gravity, and the driven rack 3136 can mesh with the driving rack 325. In addition, the receiving plate 3132 can abut against the unlocking portion 3262 of the locking member 326 during the descent process to drive the locking member 326 to move downward, and the locking hook 3221 can be disengaged from the locking groove 3261. When the locking hook 3221 is disengaged, the reset spring 324 is reset from the compressed state to the reset state, and the driving seat 322 moves from the starting position to the ending position under the elastic force of the reset spring 324, and the conveying platform 313 can carry the test tube rack from the placement position to the cleaning position synchronously.

[0083] Reference Figure 3 and Figure 4 , a retraction blocker 314 is provided on the inner bottom surface of the cleaning unit 21, and the retraction blocker 314 has a retraction hook 3141. A retraction groove 3137 is provided at one end of the receiving plate 3132 away from the warehouse inlet 211. When a test tube rack is placed on the receiving plate 3132 and moved to the cleaning station, the retraction hook 3141 can be inserted into the retraction groove 3137, so that the conveying platform 313 is locked in the cleaning station. And since the driven rack 3136 and the driving rack 325 are always engaged when there is a test tube rack on the receiving plate 3132, the driving assembly 32 is also locked in the termination position. During the cleaning process of the test tube rack, since the conveying platform 313 and the driving seat 322 are locked, the warehouse door 212 cannot be opened to ensure the safety of the equipment.

[0084] When the test tube rack is cleaned, the test tube rack will be removed from the conveying platform 313. The cleaning structure of the test tube rack and the structure for removing the test tube rack from the conveying platform 313 are not described here in detail, and will be described in detail in subsequent embodiments.

[0085] When the test tube rack is removed from the conveyor 313, the receiving plate 3132 is driven by the elastic force of the connecting spring 3133 to rise and reset, at which time the blocking hook 3141 can be disengaged from the blocking groove 3137, and the conveyor 313 is unlocked. And when the receiving plate 3132 rises, the driven rack 3136 is disengaged from the driving rack 325 and no longer meshes, at which time the drive seat 322 is unlocked, and the drive seat 322 can be moved by the opening and closing of the warehouse door 212. When the conveyor 313 is disconnected from the drive seat 322, the conveyor 313 can move along the conveying guide rail 311 towards the direction close to the warehouse entrance 211 under the action of gravity, without the need for equipment to drive. When the warehouse door 212 is reopened, the conveyor 313 can extend out of the warehouse entrance 211 and be in the placement station, and the test tube rack can be placed on the conveyor 313 again.

[0086] Reference Figure 3 The cleaning mechanism 4 includes a support frame 41, a sponge frame 42, a brush head assembly 43 and a lifting drive member 44.

[0087] The support frame 41 is lifted and slid in the cleaning unit 21 and is located above the conveying mechanism 3. The lifting drive 44 is used to drive the support frame 41 to lift. In this embodiment, the lifting drive 44 is a cylinder structure, and can also be a motor drive or other structure that can drive an object to lift.

[0088] Reference Figure 3 and Figure 6 The sponge rack 42 is used to add cleaning liquid to the test tube rack, and the sponge rack 42 includes a frame 421 and an annular liquid-absorbing cotton 422. Sliding rods 423 are symmetrically arranged on the frame 421, and the frame 421 is lifted and slid on the support frame 41 through the sliding rods 423. The area of ​​the frame 421 is slightly larger than the top surface area of ​​the test tube rack so that the frame 421 can cover the test tube rack. The array on the test tube rack has a large number of placement openings for placing test tubes, so the frame 421 is provided with through holes 424 corresponding to the placement openings one by one, and when the frame 421 is arranged on the test tube rack, the through holes 424 are directly opposite to the placement openings of the test tube rack.

[0089] The annular absorbent cotton 422 is detachably mounted in the through hole 424, and the lower end of the annular absorbent cotton 422 extends out of the through hole 424. When the frame 421 is installed on the test tube rack, the annular absorbent cotton 422 can extend into the placement port and the circumference of the annular absorbent cotton 422 can abut against the inner wall of the placement port.

[0090] The top of the frame 421 is provided with a liquid inlet groove 425 and a liquid guide groove 426, and the liquid guide groove 426 connects the through hole 424 and the liquid inlet groove 425. By adding liquid into the liquid inlet groove 425, the liquid can flow to the through hole 424 through the liquid guide groove 426, thereby wetting the annular liquid absorbent cotton 422 installed in the through hole 424.

[0091] Reference Figure 3 , Figure 6 and Figure 7 The brush head assembly 43 is used to scrub the test tube rack. The brush head assembly 43 is mounted on the support frame 41 by snapping, so as to facilitate the replacement of the brush head assembly 43. The brush head assembly 43 includes a brush head frame 431 and a brush head 432. The brush heads 432 are arranged in an array. The number of brush heads 432 corresponds to the placement opening of the test tube rack one by one, and the diameter of the brush head 432 is larger than the inner diameter of the annular liquid-absorbing cotton 422. The top of the brush head 432 has a rod 4321. The brush head 432 is detachably mounted on the brush head frame 431 through the rod 4321. The top of the rod 4321 is provided with a snap-in block 4322, and the snap-in block 4322 is a square block.

[0092] The brush head frame 431 is provided with mounting through holes 4311 which correspond to the brush heads 432 one by one and are used for the clamping block 4322 and the rod 4321 to pass through. The top of the brush head frame 431 is also provided with a clamping groove 4312 which is connected to the mounting through hole 4311 and is rotatably clamped by the clamping block 4322. The clamping groove 4312 is adapted to the shape of the clamping block 4322.

[0093] When installing the brush head 432 , firstly pass the engaging groove 4312 of the rod 4321 through the mounting through hole 4311 , then rotate it by a certain angle to align with the engaging groove 4312 , and then engage the engaging block 4322 into the engaging groove 4312 .

[0094] In order to prevent the clamping block 4322 from being easily dislodged after being installed in the clamping groove 4312, a brush head cover plate 433 is horizontally slidably installed on the top of the brush head frame 431, and the brush head cover plate 433 can press the clamping block 4322 into the clamping groove 4312. When the brush head 432 needs to be disassembled, the brush head cover plate 433 can be horizontally slid out of the brush head frame 431.

[0095] When the brush head assembly 43 is installed on the support frame 41, the brush head 432 is located above the sponge frame 42. When the test tube rack is located at the cleaning station, the test tube rack is directly opposite to the sponge frame 42 and the brush head assembly 43. At this time, the lifting drive 44 can drive the support frame 41 to descend. The sponge frame 42 first abuts against the test tube rack and covers the top of the test tube rack, and the annular liquid-absorbing cotton 422 abuts against the inner wall of the placement opening of the test tube rack. When the support frame 41 continues to descend, the sliding rod 423 of the sponge frame 42 slides vertically on the support frame 41 so that the sponge frame 42 remains stationary on the test tube rack, and the brush head assembly 43 continues to descend with the support frame 41 and enters the placement opening of the test tube rack after passing through the annular liquid-absorbing cotton 422.

[0096] When the brush head 432 abuts against the annular liquid-absorbing cotton 422, the brush head 432 can squeeze the annular liquid-absorbing cotton 422, thereby squeezing out the liquid in the annular liquid-absorbing cotton 422. After being squeezed out, the liquid can flow downward along the inner wall of the placement opening of the test tube rack, and the brush head 432 continues to descend with the support frame 41, thereby being able to move downward along the inner wall of the placement opening of the test tube rack to evenly apply the liquid to the inner wall of the placement opening of the test tube rack and clean it. When cleaning is completed, the liquid can flow out from the outlet on the inner bottom surface of the placement opening of the test tube rack.

[0097] Reference Figure 3 and Figure 6 The cleaning mechanism 4 further includes a liquid spraying assembly 45, which includes a liquid inlet main pipe 451, a spray pipe 452 and a liquid adding pipe 453. The spray pipe 452 is connected to the liquid inlet main pipe 451 and is arranged on the inner wall of the cleaning unit 21. The spray pipe 452 has a nozzle, so that the outer surface of the test tube rack can be sprayed and cleaned. The liquid adding pipe 453 is connected to the liquid inlet main pipe 451 and its outlet is directly opposite to the liquid inlet groove 425 of the sponge rack 42. The liquid adding pipe 453 can add cleaning liquid to the liquid inlet groove 425 to ensure that the annular liquid absorbent cotton 422 is always wet.

[0098] The liquid source structure in the liquid inlet main pipe 451 is not described in detail here, but will be described in detail in subsequent embodiments.

[0099] Reference Figure 8 A pushing assembly 5 is also provided in the cleaning unit 21, and the pushing assembly 5 includes a pushing plate 51 and a pushing source 52. In this embodiment, the pushing source 52 is in the form of a cylinder, which is installed outside the cleaning unit 21, and its push rod extends into the cleaning unit 21. The pushing plate 51 is connected to the pushing source 52. The pushing source 52 can drive the pushing plate 51 to move horizontally and abut against the outer wall of the test tube rack, and the pushing plate 51 drives the test tube rack to leave the conveying platform 313 and enter the storage unit 22.

[0100] Reference Figure 2 and Figure 8A partition door 24 is provided between the storage unit 22 and the cleaning unit 21 . When the test tube rack is cleaned, the partition door 24 is opened, and the test tube rack can enter the storage unit 22 through the partition door 24 .

[0101] In order to facilitate operators to take the test tube rack from the storage unit 22 , the storage unit 22 is rotatably provided with a box cover 221 for covering the storage unit 22 , and the storage unit 22 can be opened by rotating the box cover 221 upward.

[0102] The test tube rack can be disinfected and dried in the storage unit 22. The top of the storage unit 22 is provided with an ultraviolet disinfection lamp 222, which can disinfect the test tube rack. The top of the storage unit 22 is also provided with an intake fan 223, and the top of the cleaning unit 21 is provided with an exhaust fan 213. The intake fan 223 can absorb and purify air from the outside and then send it into the storage unit 22, and the exhaust fan 213 can exhaust the air. In order to allow air to flow between the storage unit 22 and the cleaning unit 21, the cleaning device 2 is provided with an interconnected water vapor layer 25 at the bottom of the cleaning unit 21 and the storage unit 22, and the inner bottom surfaces of the storage unit 22 and the cleaning unit 21 are provided with water leakage holes 26. Air can pass through the water leakage holes 26, and liquid can also pass through the water leakage holes 26.

[0103] When the air intake fan 223 blows air to the storage unit 22, air can enter the cleaning unit 21 through the water vapor layer 25 and be exhausted through the exhaust fan 213. And the liquid in the cleaning unit 21 and the storage unit 22 can also enter the water vapor layer 25 through the water leakage hole 26.

[0104] Reference Figure 8 A water collecting device 6 is provided on one side of the extraction device 1, and the water collecting device 6 is connected to the water vapor layer 25 for receiving the liquid in the water vapor layer 25. When the air intake fan 223 blows air, the liquid in the water vapor layer 25 can be blown into the water collecting device 6 under the action of the wind, so that the water vapor layer 25 can also be dried and not easy to breed bacteria.

[0105] The inner bottom surface of the storage unit 22 is also rotatably provided with a tray 224, and the test tube rack falls on the tray 224 after entering the storage unit 22. Rotating blades 225 are circumferentially provided on the bottom surface of the tray 224, and the storage unit 22 is also provided with air holes 226 on the bottom surface of the tray 224, and the air holes 226 are connected with the water vapor layer 25. When the air intake fan 223 blows air to the storage unit 22, air can also enter the water vapor layer 25 from the air holes 226. When the air passes through the air holes 226, the air can generate thrust on the rotating blades 225, so that the tray 224 rotates, and after the test tube rack rotates synchronously, the liquid on its surface can be thrown out to accelerate drying.

[0106] Reference Figure 2 In this embodiment, the liquid used to clean the test tube rack in the cleaning unit 21 is an alcohol solution with a concentration of 75%, and the supply unit 23 is used to produce the alcohol solution and provide it to the cleaning unit 21. The supply unit 23 is provided with a mixing box assembly 231, a pure alcohol tank 232, a liquid pump 233 and a storage box 234. The pure alcohol tank 232 is used to hold pure alcohol with a concentration of 99%, the mixing box assembly 231 is used to mix pure alcohol with water to form an alcohol solution with a concentration of 75%, the liquid pump 233 connects the mixing box assembly 231 and the pure alcohol tank 232 and is used to pump the pure alcohol in the pure alcohol tank 232 into the mixing box assembly 231, and the storage box 234 is used to store the mixed 75% alcohol solution.

[0107] The material storage box 234 is connected to the liquid inlet main pipe 451 . When the test tube rack needs to be cleaned in the cleaning unit 21 , the alcohol solution in the material storage box 234 can be fed into the liquid inlet main pipe 451 .

[0108] Reference Figure 2 and Fig. 9 The mixing box assembly 231 includes a mixing box body 2311, a stirring motor 2312, a stirring shaft 2313, a paddle 2314 and a liquid inlet ring 2315. The mixing box body 2311 is used to mix pure alcohol and water. The stirring motor 2312 is arranged at the top of the mixing box body 2311. The stirring shaft 2313 is coaxially arranged with the mixing box body 2311 and extends out of the top of the mixing box body 2311, and the stirring shaft 2313 is connected to the stirring motor 2312. The paddle 2314 is connected to the bottom of the stirring shaft 2313.

[0109] Reference Fig. 9 and Fig.10 , a liquid infusion channel 23131 is provided in the inner circumference of the stirring shaft 2313, and the liquid infusion channel 23131 penetrates to its bottom surface. The liquid inlet ring 2315 sealing sleeve is arranged on the outer side of the stirring shaft 2313 and does not rotate synchronously with the stirring shaft 2313. The liquid inlet ring 2315 is provided with a water inlet channel 23151 and an alcohol channel 23152 which are connected to the liquid infusion channel 23131, wherein the water inlet channel 23151 is connected to an external water pipe for water inlet, and the alcohol channel 23152 is connected to the liquid pump 233 for pure alcohol inlet. In this embodiment, the liquid inlet ring 2315 can be located on the outer side of the top of the mixing box 2311, or it can be located inside the mixing box 2311.

[0110] In order to make the alcohol solution in the mixing box 2311 more evenly mixed, the inner bottom surface of the mixing box 2311 is provided with a circulation outer hole 23111 in the circumferential direction, and a circulation inner hole 23112 is provided at the center of the inner bottom surface. The mixing box 2311 is provided with a circulation water pump 2316 for sucking liquid from the circulation outer hole 23111 and ejecting liquid from the circulation inner hole 23112. The bottom of the mixing box 2311 is provided with a partition 2318, and the circulation water pump 2316 is located in the partition 2318. The bottom of the stirring shaft 2313 is provided with a guide member 2317, and the guide member 2317 is directly opposite to the circulation inner hole 23112. The bottom surface of the guide member 2317 is provided with a guide slope 23171 in the circumferential direction, and the guide slope 23171 is inclined toward the direction of the blade 2314.

[0111] When the circulating water pump 2316 draws the solution through the circulating outer hole 23111 and sprays the solution from the circulating inner hole 23112, the solution can be sprayed on the guide slope 23171 of the guide member 2317 and ejected toward the paddle 2314 under the guidance of the guide slope 23171, and the paddle 2314 can mix and stir the sprayed solution with the original solution, thereby making the solution in the mixing box 2311 more uniform.

[0112] Reference Figure 2 and Fig. 9 When pure alcohol and water are stirred and mixed in the mixing box 2311, the alcohol solution is easy to volatilize and produce alcohol gas. In order to prevent the alcohol gas from being wasted, a volatilization hole 23113 is opened on the top of the mixing box 2311, and an air outlet 27 is opened between the supply unit 23 and the storage unit 22. An air suction device 28 for sucking air from the volatilization hole 23113 and blowing air from the air outlet 27 is connected between the volatilization hole 23113 and the air outlet 27.

[0113] The suction device 28 can suck out the alcohol gas generated in the mixing box 2311 and send it into the storage unit 22. After the alcohol gas enters the storage unit 22, it can be mixed with the liquid on the surface of the test tube rack, thereby further cleaning the surface of the test tube rack.

[0114] Reference Figure 2 and Fig.11 When the pure alcohol in the pure alcohol tank 232 is used up, it is necessary to refill the pure alcohol tank 232, so the supply unit 23 is provided with a charging bin door 29 on one side of the pure alcohol tank 232. The charging bin door 29 is rotatably provided with a lock portion 291 inside the supply unit 23, and the lock portion 291 has a hook portion 292. In this embodiment, the lock portion 291 can only be rotated by a specific key, and when there is no key, the lock portion 291 is fixed.

[0115] The side wall of the pure alcohol tank 232 has a door lock channel 2321, and the bottom of the door lock channel 2321 is connected to the inside of the pure alcohol tank 232. A lifting lock 2322 is sealed in the door lock channel 2321, and the lifting lock 2322 can be lifted and lowered as the liquid level in the pure alcohol tank 232 changes. In order to make the lifting lock 2322 lift more smoothly in the door lock channel 2321, an auxiliary spring 2323 is provided in the door lock channel 2321, and the auxiliary spring 2323 is connected to the lifting lock 2322. The elastic force of the auxiliary spring 2323 on the lifting lock 2322 is less than the upward pressure of the liquid on the lifting lock 2322. When the liquid in the pure alcohol tank 232 is insufficient, the auxiliary spring 2323 can drive the lifting lock 2322 to move downward, and when the liquid in the pure alcohol tank 232 is sufficient, the liquid can drive the lifting lock 2322 to move upward to overcome the elastic force of the auxiliary spring 2323.

[0116] The door lock passage 2321 has a locking hole 2324 for the hook portion 292 to be inserted into. When the pure alcohol in the pure alcohol tank 232 is sufficient, the lifting locking member 2322 is located at the top of the door lock passage 2321. When the charging bin door 29 is closed, the lock portion 291 extends into the locking hole 2324 and the hook portion 292 engages with the lifting locking member 2322, so that the lock portion 291 cannot be withdrawn from the locking hole 2324, and the charging bin door 29 cannot be opened. At this time, if you want to open the charging bin door 29, you can rotate the lock portion 291 with a specific key to unlock the hook portion 292 and the lifting locking member 2322.

[0117] When the pure alcohol in the pure alcohol tank 232 is insufficient, the lifting locking member 2322 moves downward along with the liquid level. At this time, the hook portion 292 and the lifting locking member 2322 can also be disengaged, and the charging bin door 29 can be opened.

[0118] An exit plate 2325 and an exit spring 2326 are also horizontally slidably arranged in the door lock channel 2321. The exit plate 2325 abuts against the hook portion 292. The exit spring 2326 abuts against the exit plate 2325 and has a tendency to drive the hook portion 292 to exit the locking hole 2324. When the hook portion 292 is disengaged from the lifting locking member 2322, the exit spring 2326 drives the lock portion 291 to pop outward, and at this time, the charging bin door 29 can pop open to remind the operator that pure alcohol needs to be added and facilitate the operator to open the charging bin door 29.

[0119] Combination Figures 1 to 11The implementation principle of a small biological sample extraction device in an embodiment of the present application is as follows: a cleaning device 2 is arranged on one side of the extraction device 1, and the cleaning device 2 has a cleaning unit 21, a storage unit 22 and a supply unit 23. Before extracting the biological sample, the test tube rack is first placed in the cleaning unit 21 of the cleaning device 2. The cleaning unit 21 can clean the test tube rack. After cleaning, the test tube rack can be sent to the storage unit 22 for disinfection and drying. After disinfection and drying, the operator can take out the test tube rack from the storage unit 22 and conduct experiments. When the solution used to clean the test tube rack is insufficient, the supply unit 23 can replenish the cleaning unit 21 to ensure sufficient liquid.

Claims

1. A small biological sample extraction device, comprising an extraction device (1) for extracting a biological sample, characterized in that: It also includes a cleaning device (2) connected to one side of the extraction device (1) and used to clean the test tube rack, and the cleaning device (2) includes: A cleaning unit (21), used for cleaning the surface of the test tube rack; A storage unit (22) is used to sterilize, dry and store the cleaned test tube rack; A supply unit (23) for supplying a cleaning solution required for a cleaning process; The cleaning device (2) has at least three chambers, and the cleaning unit (21), the storage unit (22) and the supply unit (23) are respectively located in one of the chambers.

2. A small biological sample extraction device according to claim 1, characterized in that: The cleaning unit (21) is provided with a conveying mechanism (3) for placing a test tube rack and driving the test tube rack into and out of the cleaning unit (21), and a cleaning mechanism (4) for cleaning the test tube rack; The cleaning unit (21) is provided with a warehouse entrance (211), and the warehouse entrance (211) is provided with a warehouse door (212) which can slide vertically; The conveying mechanism (3) comprises a moving assembly (31) and a driving assembly (32); the moving assembly (31) comprises a conveying guide rail (311) provided on the bottom surface of the cleaning unit (21) and arranged along the depth direction of the bin entrance (211), a sliding seat (312) slidably mounted on the conveying guide rail (311), and a conveying platform (313) mounted on the top of the sliding seat (312); The driving assembly (32) comprises a driving rail (321) arranged on the bottom surface of the cleaning unit (21) and parallel to the conveying rail (311), a driving seat (322) sliding on the driving rail (321), a connecting rope (323) connecting the driving seat (322) and the bin door (212), and a return spring (324) arranged on the driving seat (322) and driving the driving seat (322) to return to its original position so as to return the conveying platform (313) to the inside of the cleaning unit (21); One side of the conveying platform (313) is provided with a driven rack (3136), and one side of the driving seat (322) is provided with a driving rack (325), and the driven rack (3136) is meshed with the driving rack (325); The driving assembly (32) has a starting position and a stopping position; when the driving seat (322) is at the starting position, the bin door (212) is in an open state, and the return spring (324) is in a compressed state; when the driving seat (322) is at the stopping position, the bin door (212) is in a closed state, and the return spring (324) is in a return state.

3. A small biological sample extraction device according to claim 2, characterized in that: The bottom surface of the cleaning unit (21) is arranged to be inclined downward in a direction close to the storage opening (211), and the conveying mechanism (3) is parallel to the bottom surface of the cleaning unit (21); The conveying platform (313) comprises a base plate (3131), a receiving plate (3132) located above the base plate (3131) and used for placing a test tube rack, and a connecting spring (3133) located between the base plate (3131) and the receiving plate (3132) and connecting the two; the top of the receiving plate (3132) is arranged horizontally; the driven rack (3136) is located on one side of the receiving plate (3132); when the test tube rack is placed on the receiving plate (3132), the driven rack (3136) is meshed with the driving rack (325); A locking piece (326) for locking the driving seat (322) is vertically slidably provided on the driving guide rail (321), and the locking piece (326) has a locking groove (3261); the driving seat (322) has a locking hook (3221), and when the driving seat (322) is at the starting position, the locking hook (3221) is engaged with the locking groove (3261); The locking member (326) has an unlocking portion (3262), and when the test tube is placed on the receiving plate (3132), the unlocking portion (3262) abuts against the receiving plate (3132) to unlock the driving seat (322).

4. A small biological sample extraction device according to claim 2, characterized in that: The cleaning mechanism (4) comprises a liquid spraying assembly (45) for spraying liquid, a support frame (41), a sponge frame (42) that is lifted and slidably moved on the support frame (41), a brush head assembly (43) fixed to the support frame (41), and a lifting drive member (44) that drives the support frame (41) to lift and lower; The sponge rack (42) comprises a rack body (421) and an annular liquid-absorbing cotton (422); the rack body (421) is provided with an array of through holes (424) corresponding to and facing the placement openings of the test tube rack, and the annular liquid-absorbing cotton (422) is snapped into the through holes (424); the top of the rack body (421) is provided with a liquid inlet groove (425) and a liquid guide groove (426); the liquid guide groove (426) is connected with the through holes (424) and the liquid inlet groove (425); The brush head assembly (43) comprises brush heads (432) arranged in an array, the brush heads (432) corresponding one to one with and facing the placement opening of the test tube rack; the diameter of the brush head (432) is larger than the inner diameter of the annular liquid-absorbing cotton (422); when the conveying platform (313) is in the cleaning unit (21), the lifting drive member (44) drives the support frame (41) to descend so that the sponge frame (42) covers the top of the test tube rack, and the brush head (432) is passed through the annular liquid-absorbing cotton (422) to scrub the inner wall of the placement opening of the test tube rack; The liquid spraying assembly (45) comprises a liquid inlet main pipe (451), a spray pipe (452) connected to the liquid inlet main pipe (451) and used for spraying liquid, and a liquid adding pipe (453) connected to the liquid inlet main pipe (451) and facing the liquid inlet tank (425) and used for adding liquid to the liquid inlet tank (425).

5. A small biological sample extraction device according to claim 4, characterized in that: The brush head (432) has a rod portion (4321), and a clamping block (4322) is arranged on the top of the rod portion (4321); the brush head assembly (43) also includes a brush head frame (431), and the brush head frame (431) is clamped to the support frame (41); the brush head frame (431) is provided with a mounting through hole (4311) for the rod portion (4321) and the clamping block (4322) to pass through, and the top of the brush head frame (431) is provided with a clamping groove (4312) for the clamping block (4322) to be rotatably clamped and connected to the mounting through hole (4311); a brush head cover plate (433) is slidably arranged on the top of the brush head frame (431) for pressing the clamping block (4322) against the clamping groove (4312).

6. The small biological sample extraction device according to claim 2, characterized in that: The storage unit (22) is adjacent to the cleaning unit (21), and a partition door (24) is provided between the storage unit (22) and the cleaning unit (21); the cleaning unit (21) is provided with a pushing component (5) for pushing the cleaned test tube rack from the cleaning unit (21) into the storage unit (22); the storage unit (22) is rotatably provided with a box cover (221) for covering the storage unit (22); and an ultraviolet disinfection lamp (222) is provided in the storage unit (22).

7. A small biological sample extraction device according to claim 6, characterized in that: The cleaning device (2) is provided with interconnected water vapor layers (25) at the bottom of the cleaning unit (21) and the storage unit (22); the bottom surface of the cleaning unit (21) and the bottom surface of the storage unit (22) are both provided with water leakage holes (26) that penetrate the water vapor layer (25); and one side of the extraction device (1) is provided with a water collection device (6) for receiving liquid in the water vapor layer (25); An air intake fan (223) is disposed on the top of the storage unit (22), and an air exhaust fan (213) is disposed on the top of the cleaning unit (21); The bottom surface of the storage unit (22) is rotatably provided with a tray (224), and the bottom surface of the tray (224) is circumferentially provided with rotating blades (225). The storage unit (22) is provided with air holes (226) circumferentially at the bottom of the tray (224), and the air holes (226) are connected to the water vapor layer (25).

8. The small biological sample extraction device according to claim 4, characterized in that: The supply unit (23) is provided with a mixing box assembly (231), a pure alcohol tank (232), a liquid pump (233) connecting the mixing box assembly (231) and the pure alcohol tank (232) and used to pump pure alcohol into the mixing box assembly (231), and a storage box (234) connected to the mixing box assembly (231) and used to store the mixed alcohol solution; the storage box (234) is communicated with the liquid inlet main pipe (451); The mixing box assembly (231) comprises a mixing box body (2311), a stirring motor (2312) arranged on the top of the mixing box body (2311), a stirring shaft (2313) connected to the stirring motor (2312), and a paddle (2314) connected to the bottom of the stirring shaft (2313) and used to stir the liquid in the mixing box body (2311); The stirring shaft (2313) is provided with an infusion channel (23131) penetrating the bottom surface in the circumferential direction inside, and a sealing sleeve outside the stirring shaft (2313) is provided with a liquid inlet ring (2315). The liquid inlet ring (2315) is provided with a water inlet channel (23151) which is in communication with the infusion channel (23131) and is used for the inlet of water, and an alcohol channel (23152) which is used for the inlet of pure alcohol. The alcohol channel (23152) is connected to the liquid pump (233); The inner bottom surface of the mixing box (2311) is provided with a circulation outer hole (23111) in the circumferential direction, and a circulation inner hole (23112) is provided at the center of the inner bottom surface; the mixing box (2311) is provided with a circulation water pump (2316) for sucking liquid from the circulation outer hole (23111) and ejecting liquid from the circulation inner hole (23112); A guide member (2317) is provided at the bottom of the stirring shaft (2313), and the guide member (2317) is directly opposite to the circulation inner hole (23112). The bottom surface of the guide member (2317) has a guide slope (23171) in the circumferential direction, and the guide slope (23171) is inclined toward the direction of the paddle (2314).

9. The small biological sample extraction device according to claim 8, characterized in that: A volatilization hole (23113) is provided on the top of the mixing box (2311), an air outlet hole (27) is provided between the supply unit (23) and the storage unit (22), and an air suction device (28) is connected between the volatilization hole (23113) and the air outlet hole (27) for sucking air from the volatilization hole (23113) and blowing air from the air outlet hole (27).

10. The small biological sample extraction device according to claim 8, characterized in that: The supply unit (23) is provided with a charging bin door (29) on one side of the pure alcohol tank (232); the charging bin door (29) is provided with a lock portion (291) that is rotated by a key, and the lock portion (291) has a hook portion (292); The side wall of the pure alcohol tank (232) is provided with a door lock channel (2321), the bottom of the door lock channel (2321) is communicated with the inside of the pure alcohol tank (232), and the door lock channel (2321) has a locking hole (2324) for the hook portion (292) to be inserted; a lifting locking member (2322) that rises and falls with the liquid level is sealed in the door lock channel (2321), and when the liquid in the pure alcohol tank (232) is sufficient, the lifting locking member (2322) is engaged with the hook portion (292); An exit plate (2325) and an exit spring (2326) are also horizontally slidably arranged in the door lock channel (2321); the exit plate (2325) abuts against the hook portion (292); the exit spring (2326) abuts against the exit plate (2325) and has a tendency to drive the hook portion (292) to exit the locking hole (2324).

Images