Smear device for medical clinical laboratory

Abstract

The invention belongs to the technical field of smear devices, and particularly relates to a smear device for a medical clinical laboratory. According to the smear device for the medical clinical laboratory, a displacement mechanism in a base drives a fixing assembly to move, rapid positioning and clamping of a glass slide are achieved, and manual operation errors are avoided; the lifting assembly drives the smearing assembly to move vertically, and the liquid sample is evenly smeared on the surface of the glass slide. In the smearing process, the displacement mechanism and the lifting assembly work cooperatively, it is ensured that the glass slide is fixed stably, the smearing action is accurate and controllable, and human intervention is reduced. According to the device, through the automatic fixing and smearing process, the operation efficiency is remarkably improved, and the problem of sample pollution or uneven distribution caused by manual operation is solved; the design of the detachable glass slide and the smear assembly is convenient to clean and maintain; the whole structure simplifies the traditional tedious smear steps, shortens the sample processing time, and improves the accuracy and consistency of the test result.

Description

Technical Field

[0001] This invention belongs to the field of smear device technology, and particularly relates to a smear device for medical laboratory use. Background Technology

[0002] Medical testing is the science of examining human samples using methods such as microbiology, immunology, and biochemistry. In medical laboratory departments, smear devices are used to evenly spread liquid samples (such as blood and bone marrow fluid) onto glass slides to prepare specimens, providing a basis for disease diagnosis.

[0003] In the prior art, the coating device needs to be manually fixed to the device during use, and it also needs to be manually unfixed after coating is completed. This makes the operation time-consuming and prone to human error. Moreover, the coating process is cumbersome due to the manual operation.

[0004] Therefore, a smear device for medical laboratory use is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a smear device for medical laboratory use to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A smear device for medical laboratory use includes: a base, a first cavity inside the base, a first through groove communicating with the first cavity on the top surface of the base, a displacement mechanism inside the first cavity, a displacement end of the displacement mechanism extending out of the first through groove and fixedly connected to a fixing component, and a glass slide detachably mounted on the fixing component.

[0008] A lifting assembly is provided on one side of the base. A fixing member is provided at the lifting end of the lifting assembly. A coating assembly is detachably connected to the fixing member. The coating assembly is located above the base. When coating is performed, the coating assembly is positioned vertically and vertically corresponding to the glass slide.

[0009] In the medical laboratory smear device of the present invention, the displacement mechanism includes an X-axis displacement assembly and a Y-axis displacement assembly. The X-axis displacement assembly includes a first threaded rod, which is rotatably connected to the first cavity via two bearing seats. One end of the first threaded rod passes through one of the bearing seats and is coaxially fixed to the output shaft of a first motor. The first motor is fixed to the inner wall of the first cavity. The first threaded rod is threadedly connected to a slide rod, the axis of which is perpendicular to the axis of the first threaded rod. The slide rod is located in the first through groove, and the top surface of the slide rod is higher than the top surface of the base. At least one smooth rod is slidably connected to the slide rod, the axis of which is parallel to the axis of the first threaded rod, and the smooth rod is fixed to the first cavity.

[0010] In the medical laboratory smear device of the present invention, the Y-axis displacement component includes a third through groove formed on the top surface of the slide rod, the axis of the third through groove being perpendicular to the axis of the first threaded rod, a second threaded rod being rotatably connected in the third through groove, the second threaded rod being arranged along the length direction of the third through groove, one end of the second threaded rod passing through the third through groove and being fixedly connected to the output shaft of a third motor, the third motor being fixedly connected to one end of the slide rod, a slider being threadedly connected to the second threaded rod, the slider being slidably connected in the third through groove, and a fixing component being located above the slide rod and fixedly connected to the slider.

[0011] In the medical laboratory smear device of the present invention, the fixing component includes a base plate, and four baffles are fixedly connected to the top surface of the base plate. The four baffles are respectively located at the four corners of the base plate, and clearance grooves are provided on all four sides of the base plate.

[0012] In the medical laboratory smear device of the present invention, four suction cups are provided on the top surface of the base plate, and the four suction cups are respectively located at the four corners of the base plate. An air channel is opened in the base plate, and the four suction cups are all connected to the air channel. A negative pressure suction machine is connected to the air channel, and the negative pressure suction machine is fixed to the bottom surface of the base plate.

[0013] In the medical laboratory smear device of the present invention, the lifting assembly includes a vertical rod fixed to the top surface of the base, a second cavity is provided in the vertical rod, the second cavity is arranged along the length direction of the vertical rod, a vertically arranged third threaded rod is rotatably connected in the second cavity, the bottom end of the third threaded rod passes through the first cavity and is coaxially fixed to the output shaft of the second motor, the second motor is fixed in the first cavity, one end of the crossbar is threadedly connected to the third threaded rod, the crossbar is slidably connected in the second cavity, the other end of the crossbar passes through a second through groove, the second through groove is opened on one side of the vertical rod and communicates with the second cavity, the second through groove is arranged along the length direction of the vertical rod, and the fixing member is fixed to the end of the crossbar that extends out of the second cavity.

[0014] In the medical laboratory smear device of the present invention, the fixing member includes a fixing shell, which is fixed to one end of the crossbar extending out of the second cavity. The fixing shell is open at one end away from the crossbar. A limiting groove is formed on the side wall of the fixing shell. The limiting groove is inclined upward in a direction away from the crossbar. A slope is formed on the upper wall of the limiting groove. The slope is located at the end away from the crossbar.

[0015] In the medical laboratory smear device of the present invention, the smear assembly includes a piston cylinder, a piston is disposed inside the piston cylinder, a push rod is fixedly connected to the top end of the piston, the top end of the push rod extends out of the piston cylinder, a brush head is detachably connected to the bottom end of the piston cylinder, and a limiting plate is fixedly connected to the outer side wall of the brush head, the limiting plate being adapted to the limiting groove.

[0016] A telescopic rod is fixed to the top of the fixed shell, and the extended end of the telescopic rod is correspondingly set to the top of the push rod.

[0017] In the medical laboratory smear device of the present invention, the brush head includes a circular tube section for detachable connection with the piston cylinder and a fan-shaped section for smearing. The circular tube section and the fan-shaped section are smoothly transitioned. The bottom end of the fan-shaped section is horizontally arranged and has serrations. Multiple flow channels are formed in the fan-shaped section. The bottom ends of the multiple flow channels are arranged in a one-to-one correspondence with the multiple tooth roots of the serrations. The bottom end of the flow channel penetrates the tooth root of the serration, and the top end of the flow channel communicates with the piston cylinder.

[0018] In the medical laboratory smear device of the present invention, pads are fixedly attached to the four corners of the bottom surface of the base.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] The medical laboratory smear device of this invention uses a displacement mechanism within the base to drive the movement of the fixing component, achieving rapid positioning and clamping of the glass slide and avoiding errors from manual operation. The lifting component drives the smear assembly to move vertically, evenly spreading the liquid sample onto the surface of the glass slide. During the smearing process, the displacement mechanism and the lifting component work together to ensure stable fixation of the glass slide and precise, controllable smearing action, reducing human intervention.

[0021] The device of this invention significantly improves operational efficiency and reduces sample contamination or uneven distribution caused by manual operation through automated fixation and smearing processes; the detachable slide and smear assembly design facilitates cleaning and maintenance; the overall structure simplifies the traditional cumbersome smearing steps, shortens sample processing time, and improves the accuracy and consistency of test results. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0026] Figure 4 This is a front view of the coating assembly in this invention;

[0027] Figure 5 This is a top view of the fixed shell in this invention;

[0028] Figure 6 This is a front view of the fixed shell in this invention;

[0029] Figure 7 This is a top view of the base in this invention;

[0030] Figure 8 This is a top view of the fixing component in this invention;

[0031] The components are as follows: 1. Base; 2. Foot pad; 3. First motor; 4. First threaded rod; 5. Crossbar; 6. Limit switch; 7. Sliding rod; 8. Second motor; 9. First through groove; 10. Second threaded rod; 11. Slider; 12. Upright rod; 13. Third threaded rod; 14. Second through groove; 15. Fixed shell; 16. Telescopic rod; 17. Baffle; 18. Base plate; 19. Suction cup; 20. Air passage; 21. Push rod; 22. Piston; 23. Piston cylinder; 24. Brush head; 25. Limiting plate; 26. Limiting groove; 27. Negative pressure suction machine; 28. Smooth rod; 29. ​​Third motor; 30. Third through groove; 31. Control panel; 32. Ramp; 33. Flow channel. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1 to 8The present invention discloses a smear device for medical laboratory, comprising: a base 1, a first cavity being provided in the base 1, a first through groove 9 communicating with the first cavity being provided on the top surface of the base 1, a displacement mechanism being provided in the first cavity, the displacement end of the displacement mechanism extending out of the first through groove 9 and being fixedly connected to a fixing component, and a glass slide being detachably mounted on the fixing component.

[0035] A lifting assembly is provided on one side of the base 1. A fixing component is provided at the lifting end of the lifting assembly. A coating assembly is detachably connected to the fixing component. The coating assembly is located above the base 1. When coating is performed, the coating assembly and the glass slide are positioned vertically and vertically respectively.

[0036] The medical laboratory smear device of the present invention uses a displacement mechanism within the base 1 to drive the movement of the fixing component, achieving rapid positioning and clamping of the glass slide and avoiding errors from manual operation. The lifting component drives the smear component to move vertically, uniformly spreading the liquid sample onto the surface of the glass slide. During the smearing process, the displacement mechanism and the lifting component work together to ensure stable fixation of the glass slide and precise and controllable smearing action, reducing human intervention.

[0037] In one alternative embodiment, the displacement mechanism includes an X-axis displacement assembly and a Y-axis displacement assembly. The X-axis displacement assembly includes a first threaded rod 4, which is rotatably connected to a first cavity via two bearing seats. One end of the first threaded rod 4 passes through one of the bearing seats and is coaxially fixed to the output shaft of a first motor 3. The first motor 3 is fixed to the inner wall of the first cavity. The first threaded rod 4 is threadedly connected to a slide rod 7, the axis of which is perpendicular to the axis of the first threaded rod 4. The slide rod 7 is located in a first through groove 9, and its top surface is higher than the top surface of the base 1. At least one smooth rod 28 is slidably connected to the slide rod 7, the axis of which is parallel to the axis of the first threaded rod 4, and the smooth rod 28 is fixed to the first cavity.

[0038] The first motor 3 drives the first threaded rod 4 to rotate, which in turn drives the slide rod 7 to move horizontally along the first through groove 9; the smooth rod 28 on the slide rod 7 provides guidance to ensure that the slide rod 7 moves smoothly.

[0039] In addition, a limit switch 6 is fixedly connected to the bearing housing. The limit switch 6 is set in correspondence with the slide bar 7 and is used to control the stroke of the slide bar 7.

[0040] In one alternative embodiment, the slide rod 7 slides along the X-axis via a slide rail. A rack is fixedly connected to the bottom end of the slide rod 7, and a gear meshes with the rack. The gear is coaxially fixed to the output shaft of the first motor 3, and the slide rod 7 is driven to slide along the X-axis via the rack and gear structure.

[0041] In one alternative embodiment, the Y-axis displacement assembly includes a third through groove 30 formed on the top surface of the slide bar 7. The axis of the third through groove 30 is perpendicular to the axis of the first threaded rod 4. A second threaded rod 10 is rotatably connected within the third through groove 30. The second threaded rod 10 is arranged along the length of the third through groove 30. One end of the second threaded rod 10 extends out of the third through groove 30 and is fixedly connected to the output shaft of a third motor 29. The third motor 29 is fixedly connected to one end of the slide bar 7. A slider 11 is threadedly connected to the second threaded rod 10. The slider 11 is slidably connected within the third through groove 30. A fixing assembly is located above the slide bar 7 and is fixedly connected to the slider 11.

[0042] The third motor 29 drives the second threaded rod 10 to rotate, causing the slider 11 to move vertically along the third through groove 30, thereby adjusting the Y-axis position of the fixed component.

[0043] An electric push rod can also be used to replace the second threaded rod 10. The extension and retraction of the push rod directly drives the slider 11 to move, simplifying the transmission structure.

[0044] In one alternative embodiment, the fixing component includes a base plate 18, and four baffles 17 are fixedly connected to the top surface of the base plate 18. The four baffles 17 are located at the four corners of the base plate 18, and clearance grooves are provided on all four sides of the base plate 18.

[0045] The baffle 17 is L-shaped and matches the four corners of the slide to position it. The clearance groove makes it easy for staff to pick up and drop the slide.

[0046] In one alternative, four suction cups 19 are provided on the top surface of the base plate 18. The four suction cups 19 are located at the four corners of the base plate 18. An air passage 20 is provided inside the base plate 18. All four suction cups 19 are connected to the air passage 20. The air passage 20 is connected to a negative pressure suction machine 27, which is fixed to the bottom surface of the base plate 18.

[0047] The negative pressure suction machine 27 is activated, drawing air out of the suction cup 19 through the air passage 20 to create negative pressure that adsorbs the glass slide. The suction cups evenly fix the glass slide to prevent slippage; the four-corner layout enhances stability.

[0048] When the slide is made of metal, electromagnets can be installed at the four corners of the base plate 18 to attract the metal slide by magnetic force.

[0049] In one alternative embodiment, the lifting assembly includes a vertical rod 12 fixed to the top surface of the base 1. A second cavity is provided inside the vertical rod 12, which is arranged along the length of the vertical rod 12. A vertically arranged third threaded rod 13 is rotatably connected inside the second cavity. The bottom end of the third threaded rod 13 passes through the first cavity and is coaxially fixed to the output shaft of a second motor 8. The second motor 8 is fixed inside the first cavity. One end of a crossbar 5 is threadedly connected to the third threaded rod 13. The crossbar 5 is slidably connected inside the second cavity. The other end of the crossbar 5 passes through a second through groove 14, which is opened on one side of the vertical rod 12 and communicates with the second cavity. The second through groove 14 is arranged along the length of the vertical rod 12. A fixing member is fixed to the end of the crossbar 5 that extends out of the second cavity.

[0050] The second motor 8 drives the third threaded rod 13 to rotate, which in turn causes the crossbar 5 to rise and fall along the upright 12, adjusting the height of the coating assembly.

[0051] In one alternative embodiment, the fastener includes a fixing shell 15, which is fixed to one end of the crossbar 5 extending out of the second cavity. The fixing shell 15 is open at the end away from the crossbar 5. A limiting groove 26 is provided on the side wall of the fixing shell 15. The limiting groove 26 is inclined upward in the direction away from the crossbar 5. A ramp 32 is provided on the upper wall of the limiting groove 26, which is located at the end away from the crossbar 5.

[0052] In one alternative embodiment, the coating assembly includes a piston cylinder 23, a piston 22 disposed inside the piston cylinder 23, a push rod 21 fixedly connected to the top end of the piston 22, the top end of the push rod 21 extending out of the piston cylinder 23, a brush head 24 detachably connected to the bottom end of the piston cylinder 23, and a limiting plate 25 fixedly connected to the outer side wall of the brush head 24, the limiting plate 25 being adapted to the limiting groove 26.

[0053] A telescopic rod 16 is fixedly connected to the top of the fixed shell 15, and the extended end of the telescopic rod 16 is correspondingly set to the top of the push rod 21.

[0054] The telescopic rod 16 pushes the push rod 21, and the piston 22 presses down to push the sample through the flow channel 33 to the fan-shaped section, forming a smear on the glass slide. The serrated structure makes the liquid in the smear more uniform, preventing the liquid from agglomerating and affecting the smear effect. The piston controls the sample volume, the serrated structure evenly disperses the sample, and the flow channel 33 ensures consistent flow rate.

[0055] The fan-shaped section of the brush head 24 can also be equipped with a silicone roller, which can be used to apply the sample by rolling the roller to avoid sample splashing.

[0056] The limiting plate 25 is fixed to the outer wall of the brush head 24. The limiting plate 25 is inserted into the limiting groove 26 to prevent excessive pressure from causing the piston cylinder 23 to separate from the brush head 24 and resulting in coating failure. At the same time, the limiting plate 25 and the limiting groove 26 are compatible, making the coating assembly easy to disassemble.

[0057] The smear assembly is for single use only and should be discarded after use to avoid contamination.

[0058] In one alternative embodiment, the brush head 24 includes a circular tube section for detachable connection with the piston cylinder 23 and a fan-shaped section for coating. The circular tube section and the fan-shaped section are smoothly transitioned. The bottom end of the fan-shaped section is horizontally positioned and has serrations. Multiple flow channels 33 are formed inside the fan-shaped section. The bottom ends of the multiple flow channels 33 are corresponding to the roots of the serrations. The bottom ends of the flow channels 33 penetrate the roots of the serrations, and the top ends of the flow channels 33 are connected to the piston cylinder 23.

[0059] In one alternative design, pads 2 are fixed to the four corners of the bottom surface of the base 1. The base 1 is supported by the pads 2 to keep the equipment level. The pads 2 provide shock absorption and anti-slip properties, ensuring stability during the coating process.

[0060] The 2 feet have built-in leveling bolts, allowing manual adjustment of the base 1's levelness to adapt to uneven desktops.

[0061] During operation, the slide is first placed on the fixing assembly of the base 1 and fixed by suction cups 19 at the four corners of the base plate 18 to ensure stability. Then, the first motor 3 drives the first threaded rod 4 to rotate, causing the slide rod 7 to move horizontally along the first through groove 9. The third motor 29 drives the second threaded rod 10 to rotate, causing the slider 11 to move vertically along the third through groove 30 to adjust the slide to the preset position. The second motor 8 drives the third threaded rod 13 to raise and lower the crossbar 5 to adjust the height of the smear assembly so that the brush head 24 contacts the slide. During smearing, the telescopic rod 16 pushes the piston 22 in the piston cylinder 23 downward, and the sample is evenly pushed out from the fan-shaped serrated section of the brush head 24 through the flow channel 33. At the same time, the third motor 29 drives the second threaded rod 10 to rotate, causing the slider 11 to move vertically along the third through groove 30 to apply the sample liquid to the slide. After smearing, the smear assembly is a disposable consumable that can be disassembled and replaced to avoid cross-contamination.

[0062] The control system of this device consists of the following core modules:

[0063] 1. Main controller: Uses an STM32 microcontroller or PLC (Programmable Logic Controller) to be responsible for global logic control and multi-module coordination.

[0064] 2. Sensor System: Photoelectric sensor: Detects the position of the slide and the movement of the smear head to ensure accurate positioning. Pressure sensor: Monitors the pressure of the push rod during smearing to prevent excessive compression of the slide. Temperature sensor: Monitors the temperature of the sample solution to avoid affecting the uniformity of the smear due to temperature differences.

[0065] 3. Actuators: Servo motor: drives the X / Y axis displacement mechanism and lifting components to achieve high-precision motion control. Pneumatic push rod: controls the downward pressure of the brush head at 24 degrees Celsius, adapting to samples of different viscosities.

[0066] 4. Control Panel 31 (Human-Machine Interface): Touchscreen: Displays operating status, parameter settings (such as smear speed, sample volume), and alarm information. Button module: Supports manual mode switching and emergency stop operation.

[0067] Control principle: 1. Initialization positioning: The photoelectric sensor detects the position of the glass slide, and the controller drives the X / Y axis motor to adjust the smear head to the initial position to ensure alignment with the glass slide.

[0068] 2. Parameter setting and adaptive adjustment: The user inputs the sample type (such as blood, bone marrow fluid) through the touch screen, and the system automatically matches the preset smear parameters (pressure, speed); if the sample viscosity is abnormal, the pressure sensor provides feedback in real time and dynamically adjusts the downward pressure of the push rod.

[0069] 3. Smearing process: The lifting assembly drives the smearing head to descend and contact the glass slide. The servo motor pushes the piston cylinder down according to the preset trajectory, and the sample is evenly pushed out to the fan section through the flow channel. During the smearing process, the photoelectric sensor continuously monitors the displacement of the smearing head to ensure path accuracy.

[0070] 4. Anomaly Handling and Data Recording: If the pressure exceeds the limit or the displacement deviation exceeds the threshold, the system will immediately stop operating and trigger an audible and visual alarm; operating data (such as pressure curves and coating time) will be uploaded to the host computer through the communication module, supporting quality traceability and process optimization.

[0071] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0072] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A smear preparation device for medical laboratory use, characterized in that, Include: The base (1) is provided with a first cavity, the top surface of the base (1) is provided with a first through slot (9) communicated with the first cavity, the first cavity is provided with a displacement mechanism, the displacement end of the displacement mechanism is fixedly connected with a fixing assembly and extends out of the first through slot (9), and a glass slide is detachably installed on the fixing assembly; One side of the base (1) is provided with a lifting assembly, the lifting end of the lifting assembly is provided with a fixing piece, and the fixing piece is detachably connected with a smear assembly, the smear assembly is located above the base (1), and the smear assembly is arranged above and below the glass slide during smear work.

2. The smear device for a medical laboratory according to claim 1, wherein: The displacement mechanism comprises an X-axis displacement assembly and a Y-axis displacement assembly, the X-axis displacement assembly comprises a first threaded rod (4), the first threaded rod (4) is rotatably connected in the first cavity through two bearing seats, one end of the first threaded rod (4) penetrates one of the bearing seats and is coaxially fixedly connected with the output shaft of a first motor (3), the first motor (3) is fixedly connected to the inner wall of the first cavity, the first threaded rod (4) is threadedly connected with a sliding rod (7), the axis of the sliding rod (7) is perpendicular to the axis of the first threaded rod (4), the sliding rod (7) is located in the first through slot (9), the top surface of the sliding rod (7) is higher than the top surface of the base (1), and at least one light rod (28) is further slidably connected to the sliding rod (7), the axis of the light rod (28) is arranged in parallel with the axis of the first threaded rod (4), and the light rod (28) is fixedly connected in the first cavity.

3. The smear device for a medical laboratory according to claim 2, wherein: The Y-axis displacement assembly comprises a third through slot (30) formed in the top surface of the sliding rod (7), the axis of the third through slot (30) is perpendicular to the axis of the first threaded rod (4), a second threaded rod (10) is rotatably connected in the third through slot (30), the second threaded rod (10) is arranged along the length direction of the third through slot (30), one end of the second threaded rod (10) penetrates the third through slot (30) and is fixedly connected with the output shaft of a third motor (29), the third motor (29) is fixedly connected to one end of the sliding rod (7), and the second threaded rod (10) is threadedly connected with a sliding block (11), the sliding block (11) is slidably connected in the third through slot (30), and the fixing assembly is located above the sliding rod (7) and is fixedly connected with the sliding block (11).

4. The smear device for a medical laboratory according to claim 3, wherein: The fixing assembly comprises a bottom plate (18), the top surface of the bottom plate (18) is fixedly connected with four baffles (17), the four baffles (17) are respectively located at the four corners of the bottom plate (18), and the four edges of the bottom plate (18) are provided with avoiding grooves.

5. A smear device for use in a medical laboratory according to claim 4, characterized in that: The top surface of the bottom plate (18) is provided with four suction cups (19), four of which are located at the four corners of the bottom plate (18), and the bottom plate (18) is provided with an air channel (20), four of which are communicated with the air channel (20), and the air channel (20) is communicated with a negative pressure suction machine (27), and the negative pressure suction machine (27) is fixedly connected to the bottom surface of the bottom plate (18).

6. The smear device for medical laboratory use according to claim 1, wherein: The lifting assembly comprises a vertical rod (12) fixedly connected to the top surface of the base (1), a second cavity is formed in the vertical rod (12), the second cavity is arranged along the length direction of the vertical rod (12), a third threaded rod (13) vertically arranged is rotatably connected in the second cavity, the bottom end of the third threaded rod (13) penetrates into the first cavity and is coaxially fixedly connected with the output shaft of the second motor (8), the second motor (8) is fixedly connected in the first cavity, one end of the cross rod (5) is threadedly connected with the third threaded rod (13), the cross rod (5) is slidably connected in the second cavity, the other end of the cross rod (5) penetrates out of the second groove (14), the second groove (14) is formed in one side of the vertical rod (12) and communicated with the second cavity, the second groove (14) is arranged along the length direction of the vertical rod (12), and the fixing member is fixedly connected to one end of the cross rod (5) extending out of the second cavity.

7. A smear device for use in a medical laboratory according to claim 6, characterized in that: The fixing member comprises a fixing shell (15), the fixing shell (15) is fixedly connected to one end of the cross rod (5) extending out of the second cavity, the other end of the fixing shell (15) away from the cross rod (5) is arranged in an open manner, a limiting groove (26) is formed in the side wall of the fixing shell (15), the limiting groove (26) is arranged upwardly inclined away from the cross rod (5), and a slope (32) is formed in the upper wall of the limiting groove (26).

8. The smear device for a medical laboratory according to claim 7, characterized in that: The smearing assembly comprises a piston cylinder (23), a piston (22) is arranged in the piston cylinder (23), a push rod (21) is fixedly connected to the top end of the piston (22), the top end of the push rod (21) extends out of the piston cylinder (23), a brush head (24) is detachably connected to the bottom end of the piston cylinder (23), a limiting plate (25) is fixedly connected to the outer side wall of the brush head (24), and the limiting plate (25) is matched with the limiting groove (26). The top end of the fixing shell (15) is fixedly connected with a telescopic rod (16), and the elongated end of the telescopic rod (16) is correspondingly arranged with the top end of the push rod (21).

9. A smear device for use in a medical laboratory according to claim 8, characterized in that: The brush head (24) comprises a circular tube section for detachable connection with the piston cylinder (23) and a fan section for smearing, the circular tube section and the fan section are smoothly connected, the bottom end of the fan section is horizontally arranged, the bottom end of the fan section is provided with sawteeth, a plurality of flow channels (33) are arranged in the fan section, the bottom ends of the plurality of flow channels (33) are arranged in one-to-one correspondence with the tooth roots of the sawteeth, the bottom ends of the flow channels (33) penetrate the tooth roots of the sawteeth, and the top ends of the flow channels (33) are communicated with the piston cylinder (23).

10. The smear device for medical laboratory use according to claim 1, wherein: The bottom surface of the base (1) is fixed with a foot pad (2) at each corner.

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