CN212568819U - Sample analyzer and closed sample bin thereof - Google Patents

Abstract

The utility model discloses a sample analyzer and seal sample storehouse thereof seals the sample storehouse and includes: a sample bin body; the test tube placing hole is arranged on the sample bin main body and used for placing a test tube; the first clamping mechanism is arranged on the sample bin main body and used for clamping the test tube along the radial direction of the test tube placing hole; the test tube length adjusting mechanism is arranged on the sample bin main body and used for moving the test tubes along the axial direction of the test tube placing holes. The utility model provides a closed sample storehouse, cooperation through first clamping mechanism and test tube length adjustment mechanism has realized that the test tube is placed in the test tube and is placed the adjustability of downthehole length to in the test tube of guaranteeing different length install in the test tube place downthehole back, all can adjust the test tube and place downthehole position at the test tube, make the test tube of different length all can with the position phase-match of sampling needle, satisfy the blood sampling volume requirement, effectively improved the commonality.

Description

Sample analyzer and closed sample bin thereof

Technical Field

The utility model relates to an analytical equipment technical field especially relates to a sample analyzer and seal sample storehouse thereof.

Background

Sample analyzers, such as blood analyzers, are typically provided with an enclosed sample chamber. The existing closed sample bin comprises a sample bin main body, and a constant blood test tube placing hole and a trace blood test tube placing hole which are arranged on the sample bin main body. Because the size of the constant blood test tube placing hole and the micro blood test tube placing hole is fixed, the constant blood test tube placing hole and the micro blood test tube placing hole can only be matched with the test tube with a specific size. For example: the constant blood test tube placing hole supports the sampling requirement of venous blood test tubes with the diameter phi of 11mm to phi 15mm and the length of 60mm to 85mm, and the trace blood test tube placing hole supports the sampling requirement of short and uncapped trace blood test tubes with the diameter phi of 7mm to phi 11mm and the length of 30mm to 60 mm.

For test tubes of other sizes (such as diameter phi 11 mm-phi 15mm, length 60 mm-85 mm, test tube with cover, etc.), the sealed sample bin needs to be replaced, even the sample analyzer needs to be replaced, and the universality is not high.

Therefore, how to improve the versatility is a technical problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a seal sample storehouse to improve the commonality. The utility model also provides a sample analyzer.

In order to achieve the above object, the utility model provides a following technical scheme:

an enclosed sample compartment comprising:

a sample bin body;

the test tube placing hole is arranged on the sample bin main body and used for placing a test tube;

the first clamping mechanism is arranged on the sample bin main body and used for clamping the test tube along the radial direction of the test tube placing hole;

the test tube length adjusting mechanism is arranged on the sample bin main body and used for moving the test tubes along the axial direction of the test tube placing holes.

The utility model provides a closed sample storehouse is provided with first clamping mechanism and test tube length adjustment mechanism in the sample storehouse main part, and test tube length adjustment mechanism can realize placing the operation of the axial displacement test tube in hole along the test tube to, first clamping mechanism can press from both sides tight test tube, makes the test tube can fix a position and sets up in the hole is placed to the test tube. Through the cooperation of first clamping mechanism and test tube length adjustment mechanism, realized that the test tube is placed in the test tube and placed the adjustability of downthehole length to guarantee that the test tube of different length is installing in the test tube and place downthehole back, all can adjust the test tube and place downthehole position at the test tube, make the test tube of different length all can with the position phase-match of sampling needle, satisfy the blood sampling volume requirement, effectively improved the commonality.

Drawings

Fig. 1 is a schematic structural view of a closed sample chamber provided in the present invention;

fig. 2 is a schematic sectional view of a constant blood test tube placing hole of the closed sample bin according to the present invention;

FIG. 3 is a schematic view of a cross-sectional structure of a micro blood test tube placing hole of the closed sample chamber provided by the present invention;

fig. 4 is a schematic structural diagram of an adapter provided in the present invention;

FIG. 5 is a schematic structural view of the first type of micro blood test tube installed in the micro blood test tube placing hole of the closed sample bin provided by the present invention;

FIG. 6 is a schematic structural view of the second type of micro blood test tube installed in the micro blood test tube placing hole of the closed sample bin provided by the present invention;

FIG. 7 is a schematic structural view of a third type of micro blood test tube installed in the micro blood test tube placing hole of the closed sample bin provided by the present invention;

fig. 8 is a schematic view illustrating an installation state of the closed sample chamber provided by the present invention;

fig. 9 is a schematic diagram of a constant blood test tube sampling state of the closed sample chamber provided by the present invention;

fig. 10 is a schematic view of a process of discharging a macroblood test tube from a closed sample chamber according to the present invention;

fig. 11 is a schematic diagram illustrating a constant blood test tube discharging state of the closed sample chamber according to the present invention;

fig. 12 is a schematic view of a sampling state of a micro blood test tube of the closed sample chamber provided by the present invention;

fig. 13 is a schematic view of the process of discharging the micro blood test tube from the closed sample chamber;

fig. 14 is a schematic view of the state of the micro blood test tube taken out of the closed sample chamber provided by the present invention.

Detailed Description

The core of the utility model is to provide a closed sample storehouse to improve the commonality. The utility model also provides a sample analyzer.

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

As shown in fig. 1-4, the utility model provides a closed sample storehouse, including sample storehouse main part 1, be used for placing the test tube of test tube place the hole, be used for along the test tube place the radial clamping mechanism 22 of pressing from both sides tight test tube of hole and be used for along the test tube place the axial displacement test tube's of hole test tube length adjustment mechanism 21. Wherein, the test tube placing hole, the first clamping mechanism 22 and the test tube length adjusting mechanism 21 are all arranged on the sample bin main body 1.

The utility model provides a closed sample storehouse is provided with first clamping mechanism 22 and test tube length adjustment mechanism 21 on the sample storehouse main part 1, and test tube length adjustment mechanism 21 can realize placing the operation of the axial displacement test tube in hole along the test tube to, first clamping mechanism 22 can press from both sides tight test tube, makes the test tube can fix a position and sets up in the test tube places the hole. Through the cooperation of first clamping mechanism 22 and test tube length adjustment mechanism 21, realized that the test tube is placed in the test tube and placed the adjustability of downthehole length to guarantee that the test tube of different length is installing in the test tube and place downthehole back, all can adjust the test tube and place downthehole position at the test tube, make the test tube of different length all can with the position phase-match of sampling needle, satisfy the requirement of the volume of taking a blood sample, effectively improved the commonality.

It will be appreciated that the test tubes of different sizes may vary in length and diameter, and that the first clamping mechanism 22 is adapted to clamp the test tube in a radial direction of the test tube placement hole, so that the different diameters of the test tube do not affect the clamping operation of the first clamping mechanism 22.

The embodiment of the utility model provides a closed sample storehouse, also include the adapter 4 that sets up in the test tube placing hole detachably; the end of the adapter 4 has a test tube mounting hole in which a test tube can be placed. By providing an adapter 4, the versatility of the closed sample compartment is further improved. That is, when the size of a certain test tube is less, the regulation limit of first clamping mechanism 22 and test tube length adjustment mechanism 21 also can't accomplish this kind of test tube and install in the test tube place downthehole back satisfy can with the position phase-match of sampling needle and satisfy the requirement of the volume of taking a blood sample, therefore, set up adapter 4, install this test tube in the test tube mounting hole of adapter 4 tip, install adapter 4 in the test tube place downthehole again, first clamping mechanism 22 and test tube length adjustment mechanism 21 carry out the centre gripping location to adapter 4, can further adjust the position of this test tube, make this test tube and the position phase-match of sampling needle and satisfy the requirement of the volume of taking a blood sample. Wherein the adapter 4 corresponds to the jacket of the test tube so as to change the position of the test tube placed in the test tube placing hole.

In order to effectively improve the utilization rate of the adapter 4, test tube mounting holes are formed in two ends of the adapter 4; two test tube mounting holes can match with the test tube of two kinds of different models. In this embodiment, the number of the adapters 4 may be plural.

As shown in fig. 4, the test tube mounting holes at both ends of the adapter 4 are a large port 41 and a small port 42, respectively.

As shown in fig. 5, when the first test tube 51 needs to be installed in the test tube placing hole, the first test tube 51 is installed on the small port 42 of the adapter 4, and then the adapter 4 is installed in the test tube placing hole, so that the first clamping mechanism 22 clamps the outer wall of the adapter 4, the test tube length adjusting mechanism 21 contacts with the bottom of the adapter 4, and the adjustability of the length of the first test tube 51 placed in the test tube placing hole is realized through the cooperation of the first clamping mechanism 22 and the test tube length adjusting mechanism 21.

As shown in fig. 6, when the second test tube 52 needs to be installed in the test tube placing hole, the second test tube 52 is installed on the large port 41 of the adapter 4, and then the adapter 4 is installed in the test tube placing hole, so that the first clamping mechanism 22 clamps the outer wall of the adapter 4, the test tube length adjusting mechanism 21 contacts with the bottom of the adapter 4, and the adjustability of the length of the second test tube 52 placed in the test tube placing hole is realized through the cooperation effect of the first clamping mechanism 22 and the test tube length adjusting mechanism 21.

As shown in fig. 7, when the third test tube 53 needs to be installed in the test tube placing hole, since the first clamping mechanism 22 can directly clamp the outer wall of the third test tube 53, and the test tube length adjusting mechanism 21 can also directly adjust the length of the third test tube 53 to the position which matches the position of the sampling needle and meets the requirement of the blood collection amount, the adapter 4 is detached from the test tube placing hole, and the third test tube 53 is directly installed in the test tube placing hole.

In the present embodiment, the first clamping mechanism 22 includes: a grip holder 221 connected to the sample chamber body 1; a gripping head 223 for gripping the test tube; a lateral compression elastic member 222 disposed between the holder 221 and the gripping head 223, wherein the gripping head 223 can move toward the center of the test tube placing hole by an elastic restoring force of the lateral compression elastic member 222. In this embodiment, the lateral compression resilient member 222 is a compression spring.

Preferably, be provided with spacing face on the sample storehouse main part 1, be provided with on the clamping head 223 with the fitting surface of the spacing contact of spacing face, place the hole at the clamping head 223 to the test tube and remove to extreme position back, spacing face and fitting surface contact restrict the removal of clamping head 223 to effectively avoid clamping head 223 to break away from sample storehouse main part 1.

In order to facilitate the adjustment of the clamping force, the sample bin main body 1 is provided with clamping channels which are arranged along the radial direction of the test tube placing hole; the clamping seat 221 is adjustably positioned within the clamping channel. The clamping force of the clamping head 223 can be adjusted to be increased by adjusting the clamping seat 221 to be close to the test tube placing hole; by adjusting the grip holder 221 to be away from the tube placement hole, the clamping force of the gripping head 223 can be adjusted to be reduced.

In this embodiment, the outer circumference of the clamping seat 221 is provided with an external thread, and the inner wall of the clamping channel is provided with an internal thread matched with the external thread. The holder 221 is rotated by an external tool (e.g., a screwdriver, etc.), so as to complete the operation of moving the holder 221.

The number of the first clamping mechanisms 22 is plural and is uniformly distributed along the circumferential direction of the test tube placing holes. In this embodiment, the number of the first clamping mechanisms 22 is two, and the two first clamping mechanisms 22 are arranged at an included angle of 180 °. The number of the first clamping mechanisms 22 can also be set to three, and the included angle between two adjacent first clamping mechanisms 22 in the three first clamping mechanisms 22 is 120 degrees; the number of the first clamping mechanisms 22 can also be set to be four, and the included angle between two adjacent first clamping mechanisms 22 in the four first clamping mechanisms 22 is 90 degrees; the number of first clamping mechanisms 22 may also be set to other numbers, which are not described in detail herein.

For the convenience of adjustment, the test tube length adjusting mechanism 21 includes: an adjusting base 211 connected to the sample chamber body 1; an adjusting head 213 for adjusting the axial position of the bottom of the cuvette at the cuvette placing hole; and a longitudinal compression elastic member 212 disposed between the adjustment seat 211 and the adjustment head 213, wherein the adjustment head 213 can move upward under the elastic restoring force of the longitudinal compression elastic member 212.

Preferably, the test tube length adjusting mechanism 21 is provided at the bottom of the test tube placing hole.

Be provided with the locating surface on the inner wall that the hole was placed to the test tube, adjust and be provided with the regulation face with locating surface location contact on the head 213, after adjusting head 213 rebound to extreme position, locating surface and regulation face contact restrict and adjust head 213 and continue the rebound to effectively avoid adjusting head 213 and break away from sample storehouse main part 1.

The test tube length adjusting mechanism 21 further comprises a pin shaft 214; the pin 214 is located opposite to one of the adjusting base 211 and the adjusting head 213, and the other of the adjusting base 211 and the adjusting head 213 has a locating hole along which the pin 214 can slide. In this embodiment, the pin 214 is disposed coaxially with the tube placing hole. Through the above arrangement, the movement stability of the adjustment head 213 is effectively improved.

In order to improve the positioning effect of the test tube, the pin shaft 214 and the adjusting head 213 are positioned oppositely; the end of the pin 214 away from the adjusting base 211 is a positioning shaft portion extending out of the adjusting head 213 and used for positioning the test tube. Wherein, directly placing in the test tube (third type test tube 53) bottom of placing the hole in the test tube, having the blind hole cavity, the location axial region stretches into the blind hole cavity, improves the location effect of test tube. In the structure requiring the adapter 4, taking the first test tube 51 as an example, after the first test tube 51 is mounted on the small port 42 of the adapter 4, the large port 41 of the adapter 4 faces the pin 214, and the positioning shaft portion of the pin 214 passes through the large port 41, so that the function of positioning the adapter 4 is realized, and the positioning effect of the test tube is further improved. In the structure requiring the adapter 4, taking the second test tube 52 as an example, after the second test tube 52 is mounted on the large port 41 of the adapter 4, the small port 42 of the adapter 4 faces the pin 214, and the positioning shaft portion of the pin 214 passes through the small port 42, so that the function of positioning the adapter 4 is realized, and the positioning effect of the test tube is further improved.

In this embodiment, the cuvette holding hole is a micro-blood cuvette holding hole 2. The first, second, and third test tubes 51, 52, and 53 are all micro blood tubes. The micro blood test tube can be a short open-cover micro blood test tube with the diameter phi of 7mm to phi 11mm and the length of 30mm to 60 mm; the diameter phi of the test tube can be 11mm to 15mm, the length of the test tube can be 60mm to 85mm, and the test tube can be covered.

The embodiment of the utility model provides a closed sample storehouse is still including setting up constant blood test tube on sample storehouse main part 1 and placing hole 3. That is, the constant volume blood tube placing hole 3 may not be provided in the structure of the above-described tube placing hole, and the constant volume blood tube placing hole 3 may be a structure in the related art. It is also possible to provide only one type of test tube holding hole for use as the micro blood test tube holding hole 2 and the macro blood test tube holding hole 3.

In the structure of the constant blood test tube placing hole 3, the closed sample compartment further includes a second clamping mechanism disposed on the sample compartment body 1 for clamping the test tubes in the constant blood test tube placing hole 3 in the radial direction of the constant blood test tube placing hole 3. The second clamping mechanism may be the same as the first clamping mechanism 22. Namely, the second clamping mechanism includes: a macroblood holder 33 connected to the sample chamber body 1; a macroblood holding head 31 for holding a test tube; the macroblood compression elastic member 32 provided between the macroblood retainer 31 and the macroblood retainer 33 allows the macroblood retainer 33 to move toward the center of the macroblood test tube placing hole 3 by the elastic restoring force of the macroblood compression elastic member 32. In this embodiment, the elastic constant blood pressure member 32 is a compression spring.

The embodiment of the utility model also provides a sample analyzer, which comprises a closed sample bin and an analyzer main body, wherein the closed sample bin is arranged on a sample bin mounting position of the analyzer main body;

the closed sample compartment comprises: a sample bin body 1; a test tube placing hole which is arranged on the sample bin main body 1 and is used for placing a test tube; a first clamping mechanism 22 provided on the specimen container body 1 for clamping the test tube in the radial direction of the test tube placing hole; set up on this storehouse main part 1 for the test tube length adjustment mechanism 21 of the axial displacement test tube of placing the hole along the test tube.

Because the sample storehouse is sealed through the mating reaction of first clamping mechanism 22 and test tube length adjustment mechanism 21, realized that the test tube is placed in the downthehole adjustability of length of test tube placement, consequently, effectively improved sample analyzer's commonality. That is, the closed sample chamber has the above technical effects, and the sample analyzer should have the same technical effects.

The test tube of placing the area of hole at the test tube is covered when the needle is pulled out in the sampling end, because first clamping mechanism 22's clamping-force ratio is less, the test tube probably can be pulled up under the drive of sampling needle, and the test tube cap can't go out the storehouse smoothly with the contact back of sampling needle swab bottom. Therefore, as shown in fig. 8-14, the sample analyzer provided by the embodiment of the present invention further includes a test tube pressing plate 8; the test tube pressing plate 8 comprises a height limiting surface and an inclined guide surface, wherein the height limiting surface comprises a first height limiting surface 83 which is in positioning contact with the top surface of the test tube in the test tube placing hole when the closed sample bin is arranged at the sample bin mounting position; the inclined guide surface includes a first inclined guide surface 84 connected to a free end of the first height limiting surface 83, the first inclined guide surface 84 being inclined upward in a direction away from the first height limiting surface 83; the free end of the first height-limiting surface 83 is the end thereof facing the direction of detachment of the closed sample compartment with respect to the sample analyzer main body. Through the arrangement, when the closed sample bin is arranged at the sample bin installation position, the first height limiting surface 83 is in positioning contact with the top surface of the test tube in the test tube placing hole, so that the operation of pulling up the test tube by the sampling needle is limited; when sealing the sample storehouse and taking out by sample storehouse installation position, seal the sample storehouse and remove for the dismantlement direction of sample analysis appearance main part, because the free end of first limit for height face 83 is connected with first slope spigot surface 84 to first slope spigot surface 84 is along the direction tilt up of keeping away from first limit for height face 83, consequently, the top surface and the test tube clamp plate 8 separation of test tube have realized sealing the sample storehouse and for the dismantlement of sample analysis appearance main part, guarantee going out the storehouse smoothly of test tube.

Further, the test tube placing hole is a micro blood test tube placing hole 2; the closed sample bin also comprises a constant blood test tube placing hole 3 arranged on the sample bin main body 1; the height limiting surface further comprises a second height limiting surface 81 which is in positioning contact with the top surface of the constant blood test tube 6 in the constant blood test tube placing hole 3 when the closed sample bin is arranged at the sample bin installation position; the inclined guide surface further comprises a second inclined guide surface 82 connected with the free end of the second height limiting surface 81, and the second inclined guide surface 82 is inclined upwards in the direction away from the second height limiting surface 81; the free end of the second height-limiting surface 81 is the end thereof facing the direction of detachment of the closed sample compartment with respect to the sample analyzer main body. Through the setting, the operation of avoiding constant blood test tube 6 to be pulled up under the drive of sampling needle can be realized equally, and the smooth warehouse-out of test tube has further been guaranteed.

In order to reduce the number of parts and facilitate the processing of the parts, the end of the second inclined guide surface 82 away from the second height limiting surface 81 is connected to the first height limiting surface 83. That is, the test tube holding plate 8 has a second height limit surface 81, a second inclined guide surface 82, a first height limit surface 83, and a first inclined guide surface 84, which are connected in this order.

When the constant blood test tube 6 (venous blood test tube) in the constant blood test tube placing hole 3 punctures, blood stains may be attached to the test tube cap of the constant blood test tube 6; the test tube with the cover may be placed in the micro blood test tube placing hole. If the second height-limiting surface 81 contacts with the test tube cap of the constant blood test tube 6 and scratches blood to form blood residues, the blood residues fall into the micro blood test tube to pollute the sample. In this embodiment, since the end of the second inclined guiding surface 82 away from the second height limiting surface 81 is connected to the first height limiting surface 83, and the first height limiting surface 83 is higher than the second height limiting surface 81, the test tube cap of the macroblood test tube 6 does not contact with the first height limiting surface 83 during the discharging process of the macroblood test tube 6.

In order to further facilitate the operation of delivering from the warehouse, a guide wheel 11 is arranged on the closed sample warehouse; the analyzer body is provided with a guide groove 9 which is matched with the guide wheel 11 and used for guiding the closed sample bin to be installed and detached relative to the sample bin installation position.

The above is to the utility model provides a closed sample storehouse has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (18)

1. An enclosed sample compartment, comprising:

a sample bin body (1);

the test tube placing hole is arranged on the sample bin main body (1) and used for placing a test tube;

a first clamping mechanism (22) arranged on the sample bin main body (1) and used for clamping the test tube along the radial direction of the test tube placing hole;

the test tube length adjusting mechanism (21) is arranged on the sample bin main body (1) and is used for moving the test tubes along the axial direction of the test tube placing holes.

2. The closed sample magazine according to claim 1, further comprising an adapter (4) removably arranged in the test tube placing hole;

the end of the adapter (4) is provided with a test tube mounting hole for placing a test tube.

3. The closed sample magazine according to claim 2, wherein the adapter (4) has the test tube mounting holes at both ends;

two the test tube mounting hole can match with the test tube of two kinds of different models.

4. The closed sample cartridge according to claim 1, wherein the first clamping mechanism (22) comprises:

a clamping seat (221) connected with the sample bin main body (1);

a gripping head (223) for gripping the test tube;

a transverse compression elastic member (222) arranged between the clamping seat (221) and the clamping head (223), wherein the clamping head (223) can move towards the center of the test tube placing hole under the action of the elastic restoring force of the transverse compression elastic member (222).

5. The closed sample magazine according to claim 4, characterized in that the magazine body (1) is provided with gripping channels arranged radially of the test tube placement holes;

the clamping seat (221) is arranged in the clamping channel in an adjustable position.

6. The closed sample chamber according to claim 5, wherein the outer circumference of the clamping seat (221) is provided with an external thread, and the inner wall of the clamping channel is provided with an internal thread matched with the external thread.

7. The closed sample magazine according to claim 1, wherein the first gripping mechanism (22) is in number and is evenly distributed along the circumference of the test tube placement hole.

8. The closed sample magazine according to claim 1, wherein the test tube length adjustment mechanism (21) comprises:

an adjusting seat (211) connected with the sample bin main body (1);

an adjusting head (213) for adjusting the axial position of the bottom of the test tube in the test tube placement hole;

the longitudinal compression elastic piece (212) is arranged between the adjusting seat (211) and the adjusting head (213), and the adjusting head (213) can move upwards under the action of the elastic restoring force of the longitudinal compression elastic piece (212).

9. The closed sample magazine according to claim 8, wherein the tube length adjustment mechanism (21) further comprises a pin (214);

the pin shaft (214) is positioned relative to one of the adjusting seat (211) and the adjusting head (213), a positioning hole is formed in the other of the adjusting seat (211) and the adjusting head (213), and the pin shaft (214) can slide along the positioning hole.

10. The closed sample magazine according to claim 9, wherein the pin (214) is positioned opposite the adjustment head (213);

the one end that round pin axle (214) kept away from adjust seat (211) is for stretching out adjust head (213) and be used for the location axial region of test tube.

11. The closed sample magazine according to any of claims 1 to 10, wherein the tube placement holes are micro blood tube placement holes (2).

12. The closed sample magazine according to any of claims 1 to 10, further comprising a macrocuvette holding hole (3) provided on the sample magazine body (1).

13. The closed sample magazine according to claim 12, further comprising a second clamping mechanism provided on the sample magazine body (1) for clamping the cuvettes inside the macroblood cuvette placement hole (3) in a radial direction of the macroblood cuvette placement hole (3).

14. A sample analyzer comprises a closed sample bin and an analyzer body, and is characterized in that the closed sample bin is arranged on a sample bin mounting position of the analyzer body;

the closed sample compartment comprises:

a sample bin body (1);

the test tube placing hole is arranged on the sample bin main body (1) and used for placing a test tube;

a first clamping mechanism (22) arranged on the sample bin main body (1) and used for clamping the test tube along the radial direction of the test tube placing hole;

the test tube length adjusting mechanism (21) is arranged on the main body (1) of the warehouse and used for moving the test tubes along the axial direction of the test tube placing holes.

15. The sample analyzer as claimed in claim 14, further comprising a test tube platen (8);

the test tube pressing plate (8) comprises a height limiting surface and an inclined guide surface, and the height limiting surface comprises a first height limiting surface (83) which is in positioning contact with the top surface of the test tube in the test tube placing hole when the closed sample bin is mounted at the sample bin mounting position; the inclined guide surface comprises a first inclined guide surface (84) connected with the free end of the first height limiting surface (83), and the first inclined guide surface (84) is inclined upwards along the direction far away from the first height limiting surface (83);

the free end of the first height limiting surface (83) is the end facing the disassembly direction of the closed sample cabin relative to the sample analyzer main body.

16. The sample analyzer as claimed in claim 15, characterized in that the cuvette placement hole is a micro-blood cuvette placement hole (2);

the closed sample bin also comprises a constant blood test tube placing hole (3) arranged on the sample bin main body (1);

the height limiting surface further comprises a second height limiting surface (81) which is in positioning contact with the top surface of the constant blood test tube (6) in the constant blood test tube placing hole (3) when the closed sample bin is mounted at the sample bin mounting position; the inclined guide surface further comprises a second inclined guide surface (82) connected with the free end of the second height limiting surface (81), and the second inclined guide surface (82) inclines upwards along the direction away from the second height limiting surface (81);

the free end of the second height limiting surface (81) is the end facing the disassembly direction of the closed sample cabin relative to the sample analyzer main body.

17. The sample analyzer as claimed in claim 16, characterized in that the end of the second inclined guide surface (82) remote from the second limit height surface (81) is connected to the first limit height surface (83).

18. Sample analyser according to any of claims 14-17, wherein a guide wheel (11) is arranged on the closed sample compartment;

the analyzer body is provided with a guide groove (9) which is matched with the guide wheel (11) and used for guiding the closed sample bin to be installed and detached relative to the sample bin installation position.

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