Closed single sampling device of hematology analyzer

Abstract

The utility model discloses a closed single sample introduction device of a hematology analyzer, which comprises a hollow base with an opening at the side part and an overturning seat arranged in the base, a bracket is arranged on the outer wall of a back plate of the base far away from the opening, an electromagnet and an optocoupler sensor which penetrate through the back plate are arranged on the bracket, and a vacuum blood collection tube position and an armature are arranged on the overturning seat. The lower end, close to the base back plate, of the overturning base is provided with a notch communicated with a vacuum blood collection tube position, a lever shaft is arranged on the notch wall of the overturning base, a lever optocoupler baffle rotating along the lever shaft is arranged on the lever shaft, the lever optocoupler baffle comprises a lever block and an optocoupler blocking piece which are connected, and the overturning base is further provided with a manual lock. And the side plate of the base is provided with a lock hole for locking the turnover seat by a manual lock. The device is completely triggered through the optocoupler, an operator can insert the vacuum blood collection tube and immediately leave to do other things, the vacuum blood collection tube can be taken out after sampling is completed, and the time occupied by instrument operation on the operator is reduced.

Description

Technical Field

[0001] The utility model relates to auxiliary equipment of a blood cell analyzer, in particular to a closed single sample introduction device of the blood cell analyzer. Background Art

[0002] The blood cell analyzer is a commonly used instrument for quantitative analysis of blood cells in clinical tests.

[0003] In order to protect the safety of instrument users to the greatest extent, large-scale fully automatic blood cell analyzers generally use closed puncture injection, whether in conventional batch injection mode or emergency single injection. However, small non-automatic blood cell analyzers are limited by space size and cost pressure and cannot use the complex, large and expensive closed injection system of large instruments.

[0004] In order to avoid the risk of sample leakage and the hidden danger of sampling needle pricking caused by the sampling method of opening the cover and holding the open sampling, someone has proposed a closed single sampling mechanism suitable for small instruments. For example, a closed single sampling device for a blood cell analyzer (application number: CN202022535711) contains a sliding electromagnet inside to unlock and unlock the mechanism. When the power is not on, the unlocking must be done manually using a tool. In addition, the module does not have the function of detecting the presence or absence of vacuum blood collection tubes. Opening and testing need to be operated on the interactive interface, which is more cumbersome. Although the above mechanism is smaller in size and simpler in structure than similar components of previous large instruments. However, the following shortcomings still exist:

[0005] 1. It does not have the vacuum blood collection tube detection function. The instrument cannot know whether the blood collection tube is loaded inside the vacuum blood collection tube chamber after closing it and whether to start the closed sampling immediately. The operator needs to confirm the start of sampling on the interface or button;

[0006] 2. It does not have an automatic release function, and its locking structure requires the operator to control it at the interface or button to open it. If the instrument is in a power-off or faulty state, the vacuum blood collection tube will be locked inside the instrument and cannot be opened and taken out. Only a few patents can be opened manually. Utility Model Content

[0007] The purpose of the utility model is to solve the problem that the existing small blood cell analyzer must be unlocked manually using a tool when it is not powered on, and has no ability to detect the presence of a vacuum blood collection tube, resulting in cumbersome operation. A closed single sampling device for a blood cell analyzer is proposed. The triggering of this device is completely performed by optical coupling, and the operator does not need to release the flip seat through an interface or physical button to insert a vacuum blood collection tube or modify the instrument status or confirm the start of sampling. The operator can leave immediately after inserting the vacuum blood collection tube to do other things, and wait for the vacuum blood collection tube to be taken out after the sampling is completed, thereby reducing the operator's time occupied by the instrument operation.

[0008] The technical solution to achieve the purpose of this utility model is:

[0009] A closed single-injection device for a blood cell analyzer comprises a base with an opening on the hollow side and a flip seat arranged in the base, a top plate and a bottom plate are respectively arranged on the top and bottom of the base, bearings are arranged at the lower ends of the two side plates of the base, a flip shaft is arranged between the two bearings, the flip shaft passes through the flip seat so that the flip seat can be disengaged from or pushed into the base through the side opening of the base, a gear is arranged at the end of the flip shaft passing through a side plate of the base, a gear-type damper is arranged on the outer wall of the side plate, the gear-type damper is meshed with the gear, and the base A bracket is provided on the outer wall of the back plate away from the opening, and an electromagnet and an optical coupling sensor passing through the back plate are provided on the bracket; a vacuum blood collection tube position and an armature are provided on the flip seat; a notch connected to the vacuum blood collection tube position is provided at the lower end of the flip seat close to the back plate of the base; a lever shaft is provided on the notch wall of the flip seat, and a lever optical coupling baffle rotating along the lever shaft is provided on the lever shaft, the lever optical coupling baffle includes a connected lever block and an optical coupling baffle plate, a manual lock is also provided on the flip seat, and a lock hole for locking the flip seat with a manual lock is provided on the side plate of the base.

[0010] When the flip seat is pushed into the base and the vacuum blood collection tube position does not contain a vacuum blood collection tube, the armature contacts the electromagnet, the lever block partially extends into the vacuum blood collection tube position under its own gravity, and the optical coupling baffle faces vertically toward the bottom plate of the base.

[0011] When the flip seat is pushed into the base and the vacuum blood collection tube is placed in the vacuum blood collection tube, the lever block touches the vacuum blood collection tube, the lever block and the optical coupling baffle rotate around the lever axis and are lifted up, and the optical coupling baffle extends into the optical coupling sensor to trigger the sensing operation of the optical coupling sensor.

[0012] The manual lock comprises a lock body, a lock bolt is arranged on the lock body in the direction of the lock hole, a shift rod is arranged on the outer wall, and a limit rod is arranged on the inner wall.

[0013] The flip seat is provided with a slide groove for sliding the lock body, a limiting piece for limiting the lock body, and a limiting rod hole for the movement of the limiting rod, wherein the limiting rod hole is close to the side plate of the base without the lock hole.

[0014] The top plate is provided with a sampling port for a needle to puncture into a vacuum blood collection tube for sampling.

[0015] The optical coupling sensor and the electromagnet are externally connected to a control system.

[0016] When the turning seat turns over out of the base due to its own weight, the bottom of the turning seat touches the bottom plate, and the bottom plate limits the turning angle of the turning seat to 35°~50°.

[0017] The control method of the closed single sample introduction device of the above-mentioned blood cell analyzer comprises the following steps:

[0018] 1) When the sampling device is connected to the control system and the blood cell analyzer is initialized, the vacuum blood collection tube is placed in the vacuum blood collection tube position of the flip seat, and the lever optical coupling baffle rotates around the lever axis and is lifted. When the flip seat is pushed into the base and is in a closed state, the optical coupling baffle of the lever optical coupling baffle triggers the optical coupling sensor. After the control system detects the signal of the optical coupling sensor, it first energizes the electromagnet to absorb the armature to ensure that the flip seat is in a closed and locked state. After a certain delay, the control system checks the optical coupling sensor signal again to ensure that it is not a false trigger and waits for the blood cell analyzer to be idle and immediately execute the sampling program and subsequent test counting program. When the sampling operation is completed, the electromagnet is powered off and demagnetized to release the armature. The flip seat flips out of the base opening under its own gravity and is in an open state. The operator can take out the vacuum blood collection tube. If the optical coupling sensor is triggered due to accidental reasons when the flip seat is pushed to reset, the control system sends a command to the electromagnet to energize and absorb the armature. After the delay detection, no optical coupling sensor signal is detected, then the control system will not execute the sampling operation program and immediately power off the electromagnet to release the flip seat and return to the initial detection state. After the sampling is completed and the electromagnet is powered off, the control system will have a delay so that the flip seat can take the lifted optical coupling baffle out of the closed state. If the optical coupling sensor is still blocked after the delay, the blood cell analyzer will report an error and prevent the next sampling.

[0019] 2) When the flip seat without a vacuum blood collection tube is pushed to the closed state due to an error, since there is no vacuum blood collection tube inside the flip seat, the lever optocoupler baffle is not lifted to trigger the optocoupler sensor, the control system does not take any action, the electromagnet is not powered on and will not attract the armature, and the flip seat will immediately flip out of the base after the hand is released, and the flip seat returns to the open state. Even if the lever optocoupler baffle is accidentally lifted when the flip seat is closed due to an error, so that the optocoupler baffle instantly blocks the optocoupler sensor and triggers the control system to start the program to power on the electromagnet to attract the armature, causing the flip seat to be locked, but during the subsequent delay time, the lever optocoupler baffle falls under its own gravity. After the delay is over, the optocoupler baffle of the lever optocoupler baffle no longer blocks the optocoupler sensor, and the control system will cut off the power to the electromagnet to release the flip seat and return to the starting inspection state;

[0020] 3) If the blood cell analyzer crashes due to a control system problem, the electromagnet loses power and releases the armature immediately after the control system is powered off, and the flip seat naturally flips out of the base and is in an open state, which can prevent the vacuum blood collection tube from accidentally remaining in the base, causing sample deterioration or affecting the next initialization of the blood cell analyzer.

[0021] Workflow:

[0022] a. Push the manual lock lever to move the lock bolt out of the lock hole and unlock the flip seat. The flip seat flips out of the base under the action of gravity to expose the vacuum blood collection tube. The gear damper limits the rotation speed of the flip shaft through the gears to ensure that the flip process is gentle and slow until the flip seat touches the bottom plate and stops moving;

[0023] b. Insert the vacuum blood collection tube into the vacuum blood collection tube position and manually push the flip seat into the base;

[0024] c. After the vacuum blood collection tube is inserted into the vacuum blood collection tube position, the lever optical coupling baffle is forced to rotate around the lever axis and be lifted. After the flip seat is reset, the optical coupling baffle blocks the optical coupling sensor. The control system reads that the optical coupling sensor is blocked, and the electromagnet is powered on. After the armature is attracted, there is a short delay;

[0025] d. After the delay ends, if the optical coupling sensor is still blocked, the control system will puncture and sample the vacuum blood collection tube in the flip seat after the previous sampling test cycle ends;

[0026] e. After the puncture is completed, the electromagnet loses power, releasing the flip seat, which flips out of the base due to its own gravity, and the vacuum blood collection tube on the flip seat can be taken out;

[0027] f. When the flip seat is released, the system reads the optocoupler signal again after a short delay. If the optocoupler sensor is not blocked, it returns to the starting waiting state. If the optocoupler sensor is still blocked, it returns an error and prevents the next sampling.

[0028] g. If the instrument is powered off while waiting for puncture sampling, the electromagnet will lose power, the flip seat will be automatically released, and the vacuum blood collection tube loaded on the flip seat can be taken out;

[0029] h. When puncture sampling is not required, the flip seat can be reset and the lock bolt can be moved forward into the lock hole through the lever to lock the flip seat. At this time, since there is no vacuum blood collection tube in the flip seat, the lever optical coupling baffle is not lifted, and the optical coupling sensor is not covered, the control system will not power on the electromagnet, and will neither attract the armature to lock the flip seat nor trigger the system sampling program. After opening the manual lock at any time, the operation of steps a to g can be repeated;

[0030] i. The manual lock has an interlocking function. When there is a vacuum blood collection tube in the vacuum blood collection tube position, the limit rod of the manual lock is limited to the rear position by the vacuum blood collection tube, that is, the lock bolt cannot be moved into the lock hole, avoiding an endless loop of repeated sampling due to the vacuum blood collection tube in the vacuum blood collection tube position when the flip seat is manually locked.

[0031] The device of this technical solution is triggered completely by an optical coupling sensor, and the operator does not need to release the flip seat through the interface or physical button to insert the vacuum blood collection tube or modify the instrument status or confirm the start of sampling. The operator can leave immediately after inserting the vacuum blood collection tube to do other things, and take out the vacuum blood collection tube after the sampling is completed, which reduces the operator's time occupied by the instrument operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an embodiment;

[0033] Figure 2 This is a schematic diagram of the flip seat in the embodiment in an open state;

[0034] Figure 3 This is a schematic diagram of the closed state of the flip seat in the embodiment;

[0035] Figure 4 is an axonometric view of an embodiment;

[0036] Figure 5 A cross-sectional view of a flip seat in the embodiment;

[0037] Figure 6 It is a cross-sectional view of the vacuum blood collection tube in the embodiment being placed in the flip seat;

[0038] Figure 7 It is a structural diagram of a manual lock in an embodiment;

[0039] Figure 8 Schematic diagram of the interlocking of the manual lock and the vacuum blood collection tube in the embodiment.

[0040] In the figure, 01, base; 011, lock hole; 02, top plate; 03, bottom plate; 04, bearing; 05, flip shaft; 06, gear; 07, gear damper; 08, flip seat; 081, vacuum blood collection tube position; 082, slide groove; 083, limit rod hole; 084, notch; 09, armature; 10, lever optical coupling baffle; 101, optical coupling baffle; 102, lever block; 11, lever shaft; 12, vacuum blood collection tube; 13, bracket; 14, electromagnet; 15, optical coupling sensor; 16, manual lock; 161, lock bolt; 162, limit rod; 163, lever; 164, lock body; 17, manual lock limit plate. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited thereto. Example

[0042] Reference Figure 1-6A closed single-injection device for a blood cell analyzer comprises a base 01 with an opening on the hollow side and a flip seat 08 arranged in the base 01. The top and bottom of the base 01 are respectively provided with a top plate 02 and a bottom plate 03. The lower ends of the two side plates of the base 01 are provided with bearings 04. A flip shaft 05 is provided between the two bearings 04. The flip shaft 05 passes through the flip seat 08 so that the flip seat 08 can be removed from or pushed into the base 01 through the side opening of the base 01. A gear 06 is provided at the end of the flip shaft 05 passing through a side plate of the base 01. A gear damper 07 is provided on the outer wall of the side plate. The gear damper 07 is meshed with the gear 06. The back plate of the base 01 is away from the opening. A bracket 13 is provided on the outer wall, and an electromagnet 14 and an optical coupling sensor 15 passing through the back plate are provided on the bracket 13; a vacuum blood collection tube position 081 and an armature 09 are provided on the flip seat 08; a notch 084 connected to the vacuum blood collection tube position 081 is provided at the lower end of the flip seat 08 near the back plate of the base 01; a lever shaft 11 is provided on the wall of the notch 084 of the flip seat 08; a lever optical coupling baffle 10 rotating along the lever shaft 11 is provided on the lever shaft 11; the lever optical coupling baffle 10 includes a connected lever block 102 and an optical coupling baffle 101; a manual lock 16 is also provided on the flip seat 08, and a lock hole 011 for locking the flip seat 08 with the manual lock 16 is provided on the side plate of the base 01.

[0043] like Figure 1 , 3 As shown in , 5, when the flip seat 08 is pushed into the base 01 and the vacuum blood collection tube position 081 does not contain the vacuum blood collection tube 12, the armature 09 contacts the electromagnet 14, and the lever block 102 partially extends into the vacuum blood collection tube position 081 under the action of its own gravity, and the optical coupling baffle 101 is vertically facing the bottom plate 03 of the base 01.

[0044] like Figure 6 As shown, when the flip seat 08 is pushed into the base 01 and the vacuum blood collection tube position 081 is placed in the vacuum blood collection tube 12, the lever block 102 touches the vacuum blood collection tube 12, the lever block 102 and the optical coupling baffle 101 rotate around the lever shaft 11 and are lifted up, and the optical coupling baffle 101 extends into the optical coupling sensor 15 to trigger the sensing operation of the optical coupling sensor 15.

[0045] like Figure 1 , 7 As shown, the manual lock 16 includes a lock body 164 , a lock bolt 161 is provided on the lock body 164 in the direction of the lock hole 011 , a lever 163 is provided on the outer wall, and a limit rod 162 is provided on the inner wall.

[0046] like Figure 7 As shown, the flip seat 08 is provided with a slide groove 082 for sliding the lock body 164, a limiting plate 17 for limiting the lock body 164, and a limiting rod hole 083 for the movement of the limiting rod 162, wherein the limiting rod hole 083 is close to the side panel of the base 01 without a lock hole.

[0047] The top plate 02 is provided with a sampling port for a needle to puncture into the vacuum blood collection tube 12 for sampling.

[0048] The optical coupling sensor 15 and the electromagnet 14 are externally connected to a control system.

[0049] like Figure 2 As shown, when the flip seat 08 flips out of the base 01 due to its own weight, the bottom of the flip seat 08 touches the bottom plate 03, and the bottom plate 03 limits the flip angle of the flip seat 08 to 35°~50°.

[0050] The control method of the closed single sample introduction device of the above-mentioned blood cell analyzer comprises the following steps:

[0051] 1) After the sampling device is connected to the control system and the blood cell analyzer is initialized, the vacuum blood collection tube 12 is placed in the vacuum blood collection tube position 081 of the flip seat 08, and the lever optical coupling baffle 10 is rotated around the lever shaft 11 and lifted. When the flip seat 08 is pushed into the base 01 and is in a closed state, the optical coupling baffle 101 of the lever optical coupling baffle 10 triggers the optical coupling sensor 15. After the control system detects the signal of the optical coupling sensor 15, it first energizes the electromagnet 14 to attract the armature 09 to ensure that the flip seat 08 is in a closed and locked state. After a certain delay, the control system checks the optical coupling sensor signal again to ensure that it is not a false trigger. After that, the system waits for the blood cell analyzer to be idle and immediately executes the sampling procedure and the subsequent test counting procedure. When the sampling operation is completed, the electromagnet 14 is powered off and demagnetized to release the armature 09. The flip seat 08 flips out of the opening of the base 01 under its own gravity and is in an open state. The operator can take out the vacuum blood collection tube 12. If the optical coupling sensor 15 is triggered due to accidental reasons when the flip seat 08 is pushed to reset, the control system sends a command to the electromagnet 14 to power on and absorb the armature 09. After the delay detection, if no optical coupling sensor signal is detected, the control system will not execute the sampling operation program and immediately power off the electromagnet 14 to release the flip seat 08 and return to the starting detection state. After the sampling is completed, the electromagnet 14 is powered off, and the control system will have a delay so that the flip seat 08 can leave the closed state with the lifted lever optical coupling baffle 10. If the optical coupling sensor is still blocked after the delay, the blood cell analyzer will return to report an error and prevent the next sampling.

[0052] 2) When the flip seat 08 without the vacuum blood collection tube 12 is pushed to the closed state due to an error operation, since there is no vacuum blood collection tube 12 inside the flip seat 08, the lever optical coupling baffle 10 is not lifted to trigger the optical coupling sensor 15, the control system does not take any action, the electromagnet 14 is not powered and will not attract the armature 09, and the flip seat 08 will immediately flip out of the base 01 after the hand is released, and the flip seat 08 returns to the open state. Even if the lever optical coupling baffle 10 is accidentally lifted when the flip seat 08 is closed due to an error operation, so that the optical coupling baffle 101 instantly blocks the optical coupling sensor 15 and triggers the control system to start the program to power on the electromagnet 14 to attract the armature 09, causing the flip seat 08 to be locked, but in the subsequent delay time, the lever optical coupling baffle 10 falls under its own gravity. After the delay is over, the optical coupling baffle 101 of the lever optical coupling baffle 10 no longer blocks the optical coupling sensor 15, and the control system will cut off the power to the electromagnet 14 to release the flip seat 08 and return to the initial inspection state;

[0053] 3) If the blood cell analyzer crashes due to a control system problem, the electromagnet 14 loses power after the control system is powered off and immediately releases the armature 09, and the flip seat 08 naturally flips out of the base 01 and is in an open state, which can prevent the vacuum blood collection tube 12 from accidentally remaining in the base 01, causing the sample to deteriorate or affecting the next initialization of the blood cell analyzer.

[0054] Workflow:

[0055] a. Push the manual lock lever 163 to move the lock bolt 161 out of the lock hole 011, unlock the flip seat 08, and the flip seat 08 flips out of the base 01 under the action of gravity, exposing the vacuum blood collection tube position 081. The gear damper 07 limits the rotation speed of the flip shaft 05 through the gear 06 to ensure that the flip process is gentle and slow, until the flip seat 08 touches the bottom plate 03 and stops moving;

[0056] b. Insert the vacuum blood collection tube 12 into the vacuum blood collection tube position 081, and manually push the flip seat 08 into the base 01;

[0057] c. After the vacuum blood collection tube 12 is inserted into the vacuum blood collection tube position 081, the lever optical coupling baffle 10 is forced to rotate around the lever shaft 11 and be lifted. After the flip seat 08 is reset, the optical coupling baffle 101 blocks the optical coupling sensor 15. The control system reads that the optical coupling sensor 15 is blocked, and the electromagnet 14 is powered on, sucking the armature 09, and a short delay occurs;

[0058] d. After the delay ends, if the optical coupler sensor 15 is still blocked, the control system will perform puncture sampling on the vacuum blood collection tube 12 in the flip seat 08 after the last sampling test cycle ends;

[0059] e. After the puncture is completed, the electromagnet 14 loses power, releasing the flip seat 08, which flips out of the base 01 due to its own gravity, and the vacuum blood collection tube 12 on the flip seat 08 can be taken out;

[0060] f. When the flip seat 08 is released, the system reads the optocoupler signal again after a short delay. If the optocoupler sensor 15 is not blocked, it returns to the starting waiting state. If the optocoupler sensor 15 is still blocked, it returns an error and prevents the next sampling.

[0061] g. If the instrument is powered off while waiting for puncture sampling, the electromagnet 14 loses power, the flip seat 08 is automatically released, and the vacuum blood collection tube 12 loaded on the flip seat 08 can also be removed;

[0062] h. When puncture sampling is not required, the flip seat 08 can be reset and the lock bolt 161 can be moved forward into the lock hole 011 through the lever 163 to lock the flip seat 08. At this time, since there is no vacuum blood collection tube 12 in the flip seat 08, the lever optical coupling baffle 10 is not lifted, and the optical coupling sensor 15 is not covered, the control system will not power on the electromagnet 14, and will neither attract the armature 09 to lock the flip seat 08 nor trigger the system sampling program. After opening the manual lock 16 at any time, the operation of steps ag can be repeated;

[0063] i. Such as Figure 8 As shown, the manual lock 16 has an interlocking function. When there is a vacuum blood collection tube 12 in the vacuum blood collection tube position 081, the limiting rod 162 of the manual lock 16 is limited to the rear position by the vacuum blood collection tube 12, that is, the lock bolt 161 cannot be moved into the lock hole 011, thereby avoiding the situation that the flip seat 08 is timing-vacuumed by the manual lock 16 and there is a vacuum blood collection tube 12 in the vacuum blood collection tube position 081, resulting in an endless loop of repeated sampling.

Claims

1. A closed single sample introduction device for a blood cell analyzer, characterized in that: The cam is provided with a top plate and a bottom plate at the top and bottom of the base, bearings are provided at the lower ends of the two side plates of the base, a turning shaft is provided between the two bearings, the turning shaft passes through the turning seat so that the turning seat can be disengaged from or pushed into the base through the side opening of the base, a gear is provided at the end of the turning shaft passing through one side plate of the base, the gear is meshed with the gear, a bracket is provided on the outer wall of the back plate of the base away from the opening, an electromagnet and an optical coupling sensor passing through the back plate are provided on the bracket, a vacuum blood collection tube position and an armature are provided on the turning seat, a notch connected to the vacuum blood collection tube position is provided on the turning seat near the lower end of the back plate of the base, a lever shaft is provided on the notch wall of the turning seat, a lever optical coupling baffle plate rotating along the lever shaft is provided on the lever shaft, the lever optical coupling baffle plate includes a connected lever block and an optical coupling baffle plate, a manual lock is also provided on the turning seat, and a lock hole for locking the turning seat with a manual lock is provided on the side plate of the base.

2. The closed single sample introduction device of the blood cell analyzer according to claim 1, characterized in that: When the flip seat is pushed into the base and the vacuum blood collection tube position does not contain a vacuum blood collection tube, the armature contacts the electromagnet, the lever block partially extends into the vacuum blood collection tube position under its own gravity, and the optical coupling baffle faces vertically toward the bottom plate of the base.

3. The closed single sample introduction device of the blood cell analyzer according to claim 2, characterized in that: When the flip seat is pushed into the base and the vacuum blood collection tube is placed in the vacuum blood collection tube, the lever block touches the vacuum blood collection tube, the lever block and the optical coupling baffle rotate around the lever axis and are lifted up, and the optical coupling baffle extends into the optical coupling sensor to trigger the sensing operation of the optical coupling sensor.

4. The closed single sample introduction device of the blood cell analyzer according to claim 1, characterized in that: The manual lock comprises a lock body, a lock bolt is arranged in the direction of the lock hole, a lever is arranged on the outer wall, and a limit rod is arranged on the inner wall.

5. The closed single sample introduction device of the blood cell analyzer according to claim 4, characterized in that: The flip seat is provided with a slide groove for sliding the lock body, a limiting piece for limiting the lock body, and a limiting rod hole for the movement of the limiting rod, wherein the limiting rod hole is close to the side plate of the base without the lock hole.

6. The closed single sample introduction device of the blood cell analyzer according to claim 1, characterized in that: The top plate is provided with a sampling port for a needle to puncture into a vacuum blood collection tube for sampling.

7. The closed single sample introduction device of the blood cell analyzer according to claim 1, characterized in that: The optical coupling sensor and the electromagnet are externally connected to a control system.

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