CN218470743U - Blood cell analyzer - Google Patents

Abstract

The application discloses a blood cell analyzer. The blood cell analyzer includes: the rack comprises a first supporting part, a second supporting part and a bearing part, wherein the first supporting part and the second supporting part are arranged at intervals, the bearing part is connected with the first supporting part and the second supporting part, an accommodating space is formed between the first supporting part and the second supporting part, and the bearing part is also provided with a guide hole; the shielding assembly is positioned in the accommodating space and is provided with a guide rod penetrating through the guide hole; the first driving piece is arranged on the bearing part, is in transmission connection with the shielding assembly and is used for driving the shielding assembly to move up and down under the limiting of the guide rod and the guide hole. Through the mode, the blood cell analyzer provided by the application is more cost-saving.

Description

Blood cell analyzer

Technical Field

The application relates to the technical field of sample analysis, in particular to a blood cell analyzer.

Background

The hemocyte analyzer is called hemocyte analyzer, blood-ball meter, blood-cell counter, etc. and is one of the widely used instruments for clinical examination in hospital. However, the structure of some parts therein is complicated, resulting in high production cost.

SUMMERY OF THE UTILITY MODEL

The application mainly provides a blood cell analyzer to solve the problem that the production cost of blood cell analyzer is higher.

In order to solve the technical problem, the application adopts a technical scheme that: a blood cell analyzer is provided. The blood cell analyzer includes: the rack comprises a first supporting part, a second supporting part and a bearing part, wherein the first supporting part and the second supporting part are arranged at intervals, the bearing part is connected with the first supporting part and the second supporting part, an accommodating space is formed between the first supporting part and the second supporting part, and the bearing part is also provided with a guide hole; the shielding assembly is positioned in the accommodating space and is provided with a guide rod penetrating through the guide hole; the first driving piece is arranged on the bearing part, is in transmission connection with the shielding assembly and is used for driving the shielding assembly to move up and down under the limiting of the guide rod and the guide hole.

In some embodiments, the shielding assembly includes a driving disc and a shielding cover, the shielding cover and the guide rod are respectively connected to two opposite sides of the driving disc, and the first driving member is in transmission connection with the driving disc.

In some embodiments, the driving disc is provided with a guide rod fixing hole, a connecting hole and a transmission mounting portion, one end of the guide rod is connected with the guide rod fixing hole, a fastener is connected with the connecting hole and the shielding cover, and the first driving member is in transmission connection with the transmission mounting portion.

In some embodiments, the shielding assembly further comprises a pneumatic connector, the driving disk is further provided with a first mounting hole, the shielding cover is provided with a second mounting hole, and the pneumatic connector is connected to the first mounting hole and the second mounting hole.

In some embodiments, the hemocyte analyzer further comprises a pipettor and a second driving member, the second driving member is mounted on the bearing portion, and a driving end of the second driving member is connected with the pipettor for driving the pipettor to move along the spacing direction of the first supporting portion and the second supporting portion.

In some embodiments, the hematology analyzer further comprises a detection seat, the detection seat can extend into or out of the accommodating space and is used for receiving the loading of the reagent kit, and the pipettor is positioned above the detection seat and is used for operating the reagent kit; the shielding assembly is used for covering the detection seat to form an electromagnetic shielding space.

In some embodiments, the first supporting portion or the second supporting portion is provided with an optocoupler, and one side of the detection seat is provided with a light blocking sheet, and the light blocking sheet is used for being matched with the optocoupler.

In some embodiments, the light blocking sheet includes a first plate body, a second plate body and a third plate body which are vertically connected in sequence, the first plate body is connected with the detection seat, the second plate body is attached to a side wall surface of the detection seat, and the third plate body is used for being matched with the optocoupler;

wherein, in the interval direction of the first supporting part and the second supporting part, the length dimension of the first plate body is greater than the length dimension of the third plate body.

In some embodiments, the test seat comprises:

the base body is provided with a transmitting cavity and a receiving cavity which are oppositely arranged;

a transmitter and a receiver, the transmitter being located within the transmitting cavity and the receiver being located within the receiving cavity;

and the pressing ring is positioned in the transmitting cavity and/or the receiving cavity, abuts against the end part of the transmitter and/or the receiver and is used for fixing the transmitter and/or the receiver on the seat body.

In some embodiments, the pressing ring comprises a first sub-ring and a second sub-ring connected with the first sub-ring, the outer diameter of the first sub-ring is larger than that of the second sub-ring, and the side wall of the pressing ring is provided with an opening which penetrates through the first sub-ring and the second sub-ring;

the first sub-ring is in interference fit with the transmitting cavity and/or the receiving cavity, the second sub-ring is in clearance fit with the transmitting cavity and/or the receiving cavity, and one end of the second sub-ring is abutted to the transmitter and/or the receiver.

The beneficial effect of this application is: in contrast to the state of the art, the present application discloses a blood cell analyzer. The first driving part and the shielding component are respectively arranged on two sides of the bearing part, so that the first driving part does not occupy the accommodating space, and the first driving part drives the shielding component more directly and more efficiently; and the bearing part which can be used for installing the first driving part and the shielding component 20 is directly arranged on the frame, compared with the method that a supporting beam which is used for installing the first driving part and the shielding component is additionally arranged on the frame, the bearing part of the frame in the application can be equivalent to the supporting beam, namely the supporting beam is integrated on the frame, so that the assembly procedures of the supporting beam and the frame are reduced, and the cost is saved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:

FIG. 1 is a schematic structural diagram of an embodiment of a blood cell analyzer provided herein;

FIG. 2 is a schematic diagram of an exploded view of a central subassembly of the blood cell analyzer of FIG. 1;

FIG. 3 is a schematic diagram of a structure of the optical coupler and the light blocking plate in the blood cell analyzer shown in FIG. 1;

FIG. 4 is a schematic front view of the light-blocking sheet shown in FIG. 3;

FIG. 5 is a schematic view showing an exploded structure of a test seat in the blood cell analyzer shown in FIG. 1;

FIG. 6 is a cross-sectional view of the test socket shown in FIG. 5;

fig. 7 is a schematic structural view of a pressing ring in the detection seat shown in fig. 5.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second" and "third" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of indicated technical features is significant. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an embodiment of the blood cell analyzer, and fig. 2 is a schematic exploded structural diagram of a middle subassembly of the blood cell analyzer shown in fig. 1.

The blood cell analyzer 100 comprises a frame 10, a shielding assembly 20, a first driving member 30 and a detection seat 40, wherein the detection seat 40 can move back and forth inside and outside the frame 10 so as to facilitate loading or unloading of a reagent kit, the shielding assembly 20 and the first driving member 30 are both arranged on the frame 10, and the first driving member 30 is used for driving the shielding assembly 20 to move up and down so that the shielding assembly 20 and the detection seat 40 cover each other to form an electromagnetic shielding space.

The frame 10 includes a first supporting portion 11, a second supporting portion 12 and a bearing portion 13 connecting the first supporting portion 11 and the second supporting portion 12, the accommodating space 14 is formed between the first supporting portion 11 and the second supporting portion 12, and the bearing portion 13 is further provided with a guide hole 130.

The frame 10 may be an integrated structure, which is manufactured by an integrated molding process, such as injection molding, pouring, mold opening, or the like, that is, the first supporting portion 11, the second supporting portion 12, and the bearing portion 13 are an integrated structure. The frame 10 may be assembled by a plurality of components, that is, the bearing portion 13 may be detachably connected to the first supporting portion 11 and the second supporting portion 12, or welded.

The shielding assembly 20 is located in the accommodating space 14, and the shielding assembly 20 is provided with a guide rod 201 penetrating through the guide hole 130; the first driving member 30 is mounted on the bearing portion 13, and is in transmission connection with the shielding assembly 20, so as to drive the shielding assembly 20 to move up and down under the limit of the guide rod 201 and the guide hole 130; the first driving member 30 drives the shielding assembly 20 to descend, so that the detecting seat 40 of the shielding assembly 20 covers the shielding assembly 20 to form an electromagnetic shielding space, and the first driving member 30 drives the shielding assembly 20 to ascend, so as to remove the electromagnetic shielding space formed by the detecting seat 40 of the shielding assembly 20.

The first driving piece 30 and the shielding component 20 are respectively arranged at two sides of the bearing part 13, so that the first driving piece 30 does not occupy the accommodating space 14, and the first driving piece 30 drives the shielding component 20 more directly and more efficiently; and the bearing part 13 for mounting the first driving element 30 and the shielding assembly 20 is directly disposed on the frame 10, compared with additionally disposing a support beam for mounting the first driving element 30 and the shielding assembly 20 on the frame 10, the bearing part 13 of the frame 10 in the present application can be equivalent to the support beam, i.e. the support beam is integrated with the frame 10, so that the assembly procedure of the "support beam" and the frame 10 is reduced, and the cost is saved.

The shielding assembly 20 includes a driving disc 21 and a shielding cover 22, the shielding cover 22 and the guide rod 201 are respectively connected to opposite sides of the driving disc 21, and the first driving member 30 is in transmission connection with the driving disc 21. By arranging the driving disc 21 to separate the first driving member 30 from the shielding cover 22, the structural integrity of the shielding cover 22 can be protected, and the structural integrity of the shielding cover 22 can be prevented from being damaged due to transmission connection and the like, which can further weaken the electromagnetic shielding effect.

The shield cover 22 may be a metal shield cover or a shield cover with a metal shield mesh disposed therein.

The driving disc 21 is provided with a guide rod fixing hole 211, a connecting hole 212 and a transmission mounting part 213, one end of the guide rod 201 is connected with the guide rod fixing hole 211, the fastening piece is connected with the shielding cover 22 through the connecting hole 212, and the first driving piece 30 is in transmission connection with the transmission mounting part 213. I.e. the main connection between the first driver 30 and the shielding assembly 20, is all taken up by the drive disc 21 to reduce operations such as making holes in the shielding cover 22 that tend to impair the shielding effect.

The guide rod fixing hole 211 can be a threaded hole, and one end of the guide rod 201 is in threaded connection with the guide rod fixing hole 211; the connecting holes 212 may be threaded holes or unthreaded holes, the fasteners may be screws or pins, etc., the shield cover 22 may be correspondingly provided with blind holes, and the fasteners connect the blind holes and the connecting holes 212 to relatively fix the shield cover 22 on the drive disc 21; the transmission mounting portion 213 may be a mounting groove or a transmission threaded hole, in this embodiment, the transmission mounting portion 213 is a mounting groove, the first driving member 30 includes a motor, a lead screw and a lead screw nut, the lead screw nut is fixed on the transmission mounting portion 213, the lead screw is in transmission connection with the lead screw nut, and the motor drives the shielding assembly 20 to ascend and descend through the lead screw and the lead screw nut.

Further, the shielding assembly 20 further includes an air pressure joint 23, the driving plate 21 is further provided with a first mounting hole, the shielding cover 22 is provided with a second mounting hole, the air pressure joint 23 is connected to the first mounting hole and the second mounting hole, and the air pressure joint 23 is used for supplying pressure to the electromagnetic shielding space or the reagent kit in the detection seat 40, so that the liquid in the front pool of the impedance detection pool of the reagent kit flows to the rear pool of the impedance detection pool of the reagent kit through the micropores and records related parameters in the process.

Further, as shown in fig. 1, the hematology analyzer 100 further includes a pipette 50 and a second driver 60, the second driver 60 is mounted on the bearing portion 13, and a driving end of the second driver 60 is connected to the pipette 50 for driving the pipette 50 to move along a spacing direction of the first support portion 11 and the second support portion 12, the spacing direction being perpendicular to the lifting direction of the shielding assembly 20 and the reciprocating direction of the detection seat 40.

The bearing part 13 is provided with the mounting seat 17, and the second driving member 60 is fixed on the mounting seat 17, so that the second driving member 60 can be more firmly fixed, the shake during the operation is less, the operation is smoother, and no clamping stagnation exists.

The second driving member 60 may include a motor and a screw, the motor driving the pipettor 50 to reciprocate through the screw; or the second driving element 60 is an air cylinder, and the air cylinder drives the liquid transfer device 50 to reciprocate in a telescopic manner.

The test seat 40 can extend into or out of the accommodating space 14 for receiving the reagent kit to be loaded, and the pipette 50 is located above the test seat 40 for operating the reagent kit.

Referring to fig. 1 to fig. 3, fig. 3 is a schematic view of a matching structure of the optical coupler and the light blocking sheet in the blood cell analyzer shown in fig. 1.

Furthermore, the optical coupler 15 is disposed on the first supporting portion 11 or the second supporting portion 12, the light blocking sheet 16 is disposed on one side of the detecting seat 40, and the light blocking sheet 16 is used to cooperate with the optical coupler 15 to determine the position of the detecting seat 40 relative to the rack 10, so that it can be determined that the detecting seat 40 extends into or out of the accommodating space 14.

In this embodiment, two spaced optical couplers 15 are disposed on the first supporting portion 11, and the two optical couplers 15 are respectively disposed at a first position and a second position; the light channel of the optocoupler 15 positioned at the first position is shielded by the light blocking sheet 16, so that the detection seat 40 can be determined to extend out of the accommodating space 14, and the reagent kit can be replaced or received; the light path of the optical coupler 15 located at the second position is blocked by the light blocking sheet 16, so that the detection seat 40 can be determined to extend into the accommodating space 14, and the pipette 50 can operate the reagent kit.

The light barrier 16 comprises a first plate body 161, a second plate body 162 and a third plate body 163 which are vertically connected in sequence, the first plate body 161 is connected with the detection seat 40, the second plate body 162 is attached to the side wall surface of the detection seat 40, and the third plate body 163 is used for being matched with the optical coupler 15; in the spacing direction between the first support portion 11 and the second support portion 12, the length dimension of the first plate 161 is greater than the length dimension of the third plate 163.

The light blocking sheet 16 is a sheet metal part generally, and the sheet metal part often causes a machining error caused by sheet metal bending, so that the third plate body 163 cannot walk in the induction groove of the optical coupler 15, namely, the optical coupler 15 cannot be triggered.

As shown in fig. 6, fig. 6 is a schematic cross-sectional structure view of the detection seat shown in fig. 5. In the direction of the interval between the first supporting portion 11 and the second supporting portion 12, under the condition that the length dimension of the light blocking sheet 16 remains unchanged, that is, under the condition that the installation position and the sensing position of the light blocking sheet 16 are fixed, the dimension B and the dimension C have been determined and remain unchanged, the larger the length dimension (dimension a) of the first plate body 161 is, the smaller the machining error caused by sheet metal bending between the first plate body 161, the second plate body 162 and the third plate body 163 is, the more accurate the shape dimension of the light blocking sheet 16 can be ensured, and then the light blocking sheet 16 can be made to travel in the sensing groove of the optical coupler 15 after installation, that is, the optical coupler 15 can be accurately triggered.

This application is greater than the length dimension of third plate body 163 through the length dimension who prescribes a limit to first plate body 161, and the length dimension of first plate body 161 of relative increase promptly to improve the processing error that the barn door 16 brought because of the panel beating is buckled, make the barn door 16 can walk in the induction tank of opto-coupler 15 after accomplishing the installation.

Referring to fig. 1 and fig. 5 to 7, fig. 5 is an exploded view of the detection seat of the blood cell analyzer shown in fig. 1, fig. 6 is a sectional view of the detection seat shown in fig. 5, and fig. 7 is a view illustrating a pressing ring of the detection seat shown in fig. 5.

The detection seat 40 comprises a seat body 41, a transmitter 42, a receiver 43 and a pressing ring 44, wherein the seat body 41 is formed with a transmitting cavity 411 and a receiving cavity 412 which are oppositely arranged; the emitter 42 is located in the emitting chamber 411 and the receiver 43 is located in the receiving chamber 412; the pressing ring 44 is located in the transmitting cavity 411 and/or the receiving cavity 412 and abuts against the end of the transmitter 42 and/or the receiver 43 for fixing the transmitter 42 and/or the receiver 43 on the holder body 41.

Specifically, the seat body 41 is formed with a receiving cavity 410, and the receiving cavity 410 is used for receiving a reagent kit and/or an optical detection cup. The emitter 42 is used for emitting a light beam, the receiver 43 is used for receiving the light beam, the light beam irradiates the sample in the reagent box and/or the sample in the optical detection cup, and the receiver 43 is used for receiving the light beam after passing through the sample in the reagent box and/or the sample in the optical detection cup, so that the optical detection of the sample in the reagent box and/or the optical detection cup is realized.

Optionally, the holder body 41 can be used in conjunction with the kit to perform electrical impedance detection and/or optical detection, such as WBC or RBC, etc., the optical detection including any one of HGB, CRP, SAA parameter detection.

Alternatively, the base body 41 can be used for matching with an optical detection cup to perform any one of HGB, CRP and SAA parameter detection.

In other words, in the present application, the emitter 42 and/or the receiver 43 are fixed in the emitting cavity 411 and/or the receiving cavity 412 by the pressing ring 44, the fixing method is simple, the fixing time is short, the production time of the detection seat is shortened, and the practicability is high.

Further, the pressing ring 44 may be a cylindrical ring, so that the force applied by the pressing ring 44 is more balanced. In other embodiments, the pressing ring 44 may also be rectangular or shaped, and the shape may be selected according to the shape of the launching cavity 411 and/or the receiving cavity 412.

Further, the pressing ring 44 is an elastic pressing ring, and the pressing ring 44 can be in interference fit with the transmitting cavity 411 and/or the receiving cavity 412, so that the fixing reliability of the pressing ring 44 can be improved, and the fixing cost is low. In other embodiments, the pressing ring 44 may be adhered to the emitting cavity 411 and/or the receiving cavity 412, which can save labor.

Further, the pressing ring 44 is cylindrical, a through hole 445 is formed in the pressing ring 44, an opening 443 communicating with the through hole 445 is formed in the side wall of the pressing ring 44, that is, the opening 443 is an opening seam formed in the side wall of the pressing ring 44, so as to increase the elasticity of the pressing ring 44 along the circumferential direction, facilitate the deformation of the pressing ring 44 for assembly, and reduce the overall weight of the pressing ring 44.

This opening 443 can be square groove, and clamping ring 44 is when the atress, and the diameter of clamping ring 44 can reduce, and when clamping ring 44 did not receive the atress, can kick-back to original condition under the effect of self elasticity. The pressing ring 44 has a simple structure, is convenient to produce and has low cost.

Further, the pressing ring 44 includes a first sub-ring 441 and a second sub-ring 442 connected to the first sub-ring 441, an outer diameter of the first sub-ring 441 is larger than an outer diameter of the second sub-ring 442, and a side wall of the pressing ring 44 is provided with an opening 443, the opening 443 penetrates through the first sub-ring 441 and the second sub-ring 442; one sub-ring 441 is in interference fit with the transmitting cavity 411 and/or the receiving cavity 412, the second sub-ring 442 is in clearance fit with the transmitting cavity 411 and/or the receiving cavity 412, and one end of the second sub-ring 442 abuts against the transmitter 42 and/or the receiver 43.

In other words, the user can hold the first sub-ring 441 with a larger outer diameter and insert the second sub-ring 442 with a smaller outer diameter into the launching cavity 411 and/or the receiving cavity 412 first, and the first sub-ring 441 has higher strength, relatively lower risk of being crushed by the user, and easier control of the degree of deformation of the second sub-ring 442.

In the process of inward pushing, the side wall of the pressing ring 44 is pressed against the side wall of the launching cavity 411 and/or the receiving cavity 412, so that the pressing ring 44 is deformed (the opening 443 is reduced) to be easily pushed inwards for assembly, wherein when the first sub-ring 441 is pressed against the side wall of the launching cavity 411 and/or the receiving cavity 412, the second sub-ring 442 is in clearance fit with the launching cavity 411 and/or the receiving cavity 412, and therefore damping between the pressing ring 44 and the side wall of the launching cavity 411 and/or the receiving cavity 412 is reduced, and assembly convenience is further improved.

In contrast to the state of the art, the present application discloses a blood cell analyzer. The first driving part and the shielding component are respectively arranged on two sides of the bearing part, so that the first driving part does not occupy the accommodating space, and the first driving part drives the shielding component more directly and more efficiently; and the bearing part which can be used for installing the first driving part and the shielding component 20 is directly arranged on the frame, compared with the method that a supporting beam which is used for installing the first driving part and the shielding component is additionally arranged on the frame, the bearing part of the frame in the application can be equivalent to the supporting beam, namely the supporting beam is integrated on the frame, so that the assembly procedures of the supporting beam and the frame are reduced, and the cost is saved.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims (10)

1. A blood cell analyzer, comprising:

the rack comprises a first supporting part, a second supporting part and a bearing part, wherein the first supporting part and the second supporting part are arranged at intervals, the bearing part is connected with the first supporting part and the second supporting part, an accommodating space is formed between the first supporting part and the second supporting part, and the bearing part is also provided with a guide hole;

the shielding assembly is positioned in the accommodating space and is provided with a guide rod penetrating through the guide hole;

the first driving piece is arranged on the bearing part, is in transmission connection with the shielding assembly and is used for driving the shielding assembly to move up and down under the limiting of the guide rod and the guide hole.

2. The hematology analyzer of claim 1, wherein the shielding assembly includes a driving disk and a shielding cover, the shielding cover and the guide rod are respectively connected to opposite sides of the driving disk, and the first driving member is in transmission connection with the driving disk.

3. The blood cell analyzer of claim 2, wherein the driving plate is provided with a guide rod fixing hole, a connecting hole and a transmission mounting portion, one end of the guide rod is connected with the guide rod fixing hole, a fastening member is connected with the connecting hole and the shielding cover, and the first driving member is in transmission connection with the transmission mounting portion.

4. The hematology analyzer of claim 2, wherein the shield assembly further comprises a pneumatic connector, the drive plate further has a first mounting hole, the shield cover has a second mounting hole, and the pneumatic connector is connected to the first mounting hole and the second mounting hole.

5. The hematology analyzer of claim 1, further comprising a pipette and a second driver, wherein the second driver is mounted on the bearing portion, and a driving end of the second driver is connected to the pipette for driving the pipette to move along a spacing direction of the first support portion and the second support portion.

6. The hematology analyzer according to claim 5, further comprising a detection seat, wherein the detection seat can extend into or out of the accommodating space for receiving the reagent kit, and the liquid transfer device is located above the detection seat for operating the reagent kit; the shielding assembly is used for covering the detection seat to form an electromagnetic shielding space.

7. The hematology analyzer of claim 6, wherein the first supporting portion or the second supporting portion is provided with an optical coupler, and one side of the detection seat is provided with a light barrier for cooperating with the optical coupler.

8. The hematology analyzer of claim 7, wherein the light barrier comprises a first plate body, a second plate body and a third plate body which are vertically connected in sequence, the first plate body is connected with the detection seat, the second plate body is attached to the side wall surface of the detection seat, and the third plate body is used for being matched with the optical coupler;

wherein, in the interval direction of the first supporting part and the second supporting part, the length dimension of the first plate body is greater than the length dimension of the third plate body.

9. The blood cell analyzer of claim 6, wherein the test seat comprises:

the base body is provided with a transmitting cavity and a receiving cavity which are oppositely arranged;

a transmitter and a receiver, the transmitter being located within the transmitting cavity and the receiver being located within the receiving cavity;

and the pressing ring is positioned in the transmitting cavity and/or the receiving cavity, abuts against the end part of the transmitter and/or the receiver and is used for fixing the transmitter and/or the receiver on the seat body.

10. The hematology analyzer of claim 9, wherein the pressing ring comprises a first sub-ring and a second sub-ring connected with the first sub-ring, an outer diameter of the first sub-ring is larger than an outer diameter of the second sub-ring, and a side wall of the pressing ring is provided with an opening which penetrates through the first sub-ring and the second sub-ring;

the first sub-ring is in interference fit with the transmitting cavity and/or the receiving cavity, the second sub-ring is in clearance fit with the transmitting cavity and/or the receiving cavity, and one end of the second sub-ring is abutted to the transmitter and/or the receiver.

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