CN218567209U - Pressing clamp jig and in-vitro diagnostic equipment - Google Patents

Abstract

The utility model relates to a press card tool and external diagnostic equipment, press the card tool to include base and first casting die. The microfluidic chip is placed on the base, the surface of the microfluidic chip, which is back to the base, is set as a first surface, the microfluidic chip is provided with a chamber which is inwards recessed from the first surface, and the chamber is used for placing a reagent card. When the micro-fluidic chip is in work, the reagent card is placed in the cavity of the micro-fluidic chip, the micro-fluidic chip is placed on the base, the pressing part of the first pressing part presses against the reagent card, and meanwhile, the second surface and the first surface are mutually abutted, so that the pressure between the reagent card and the micro-fluidic chip can be controlled within a preset range, and therefore, the pressure can be effectively controlled, and the accuracy of a detection result is ensured. In addition, when the microfluidic chip needs to be taken out and replaced, the first pressing piece is moved away, so that the microfluidic chip and the reagent card can be taken away from the base, and the operation is convenient.

Description

Pressing clamp jig and in-vitro diagnostic equipment

Technical Field

The application relates to the technical field of in-vitro diagnosis, in particular to a pressing clamp jig and in-vitro diagnosis equipment.

Background

Molecular diagnosis refers to a technique of making a diagnosis by detecting a change in the structure or expression level of genetic material in a patient's body using a molecular biological method. Molecular diagnosis is the main method for prediction diagnosis, and can be used for diagnosis of individual genetic diseases and prenatal diagnosis. Molecular diagnosis mainly refers to the detection of genes encoding various structural proteins, enzymes, antigens, antibodies, and immunologically active molecules associated with diseases. The main techniques of molecular diagnosis include nucleic acid molecular hybridization, polymerase chain reaction, biochip technique, etc.

POCT (Point-of-care testing), which refers to clinical testing and bedside testing performed beside a patient, is a new method for performing analysis immediately at a sampling site, so that a complex processing procedure of a sample during laboratory testing is omitted, and a testing result is obtained quickly.

In the conventional technology, the dry chemical reagent card is combined with the microfluidic chip, and the combination of the dry chemical reagent card and the microfluidic chip is usually performed by glue. In addition, the combination of the colloidal gold or the fluorescent test strip and the substrate is fixed by screens. However, both of these fixing effects are not easily controlled and are easily pressed too tightly or too loosely, which may affect the accuracy of the detection result.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to overcome the defects of the prior art and provide a card pressing jig and an in vitro diagnostic apparatus, which can effectively control the pressure so as to ensure the accuracy of the detection result.

The technical scheme is as follows: the utility model provides a press card tool, press card tool includes:

the base is used for placing the microfluidic chip; and

the first pressing piece is positioned above the first surface of the microfluidic chip, the surface of the first pressing piece facing the first surface is set as a second surface, the first pressing piece is provided with a pressing part positioned on the second surface, the pressing part is arranged corresponding to the cavity of the microfluidic chip, the pressing part presses against the reagent card in the cavity, and when the pressing part and the reagent card press against each other, the second surface and the first surface are mutually pressed against each other.

In one embodiment, the number of the cavities is multiple, the number of the pressing parts is multiple, and the pressing parts and the cavities are arranged in a one-to-one correspondence manner.

In one embodiment, the pressing part is provided with an avoiding hole, and the avoiding hole is used for being arranged corresponding to the color development layer of the reagent card.

In one embodiment, the avoiding hole extends from the avoiding part to a surface of the first pressing part opposite to the microfluidic chip.

In one embodiment, the pressing part is provided with a third surface, a fourth surface and a connecting surface for connecting the third surface and the fourth surface, the distance between the third surface and the second surface is H1, the distance between the fourth surface and the second surface is H2, H1> H2, the third surface is used for being abutted with the reagent card, and the fourth surface is used for being arranged opposite to the color development layer of the reagent card.

In one embodiment, the connecting portion of the connecting surface and the third surface is provided with a chamfer or a fillet.

In one embodiment, the pressing and clamping jig further comprises a second pressing piece, the second pressing piece is detachably connected with the first pressing piece, and the second pressing piece is used for being arranged on the lifting mechanism.

In one embodiment, the first pressing member is provided with at least one first magnetic attraction member, and the second pressing member is provided with a second magnetic attraction member magnetically engaged with the first magnetic attraction member.

In one embodiment, a first positioning member is arranged on the base, the microfluidic chip is provided with a first positioning hole corresponding to the first positioning member, the first pressing member is provided with a second positioning hole corresponding to the first positioning member, and the second pressing member is provided with a third positioning hole corresponding to the first positioning member; a second positioning part is arranged at the middle part of the base, and a fourth positioning hole matched with the second positioning part is arranged at the middle part of the microfluidic chip; the first pressing piece is provided with at least one third positioning piece, and the second pressing piece is provided with a fifth positioning hole corresponding to the third positioning piece.

The in vitro diagnostic equipment comprises the pressing clamp jig, a micro-fluidic chip and a reagent card, wherein the micro-fluidic chip is placed on the base, the surface, back to the base, of the micro-fluidic chip is set as a first surface, the micro-fluidic chip is provided with a cavity which is inwards concave from the first surface, and the reagent card is placed in the cavity.

In one embodiment, the in-vitro diagnostic apparatus further comprises a lifting mechanism connected with the first pressing member and used for driving the first pressing member to move up and down.

When the pressure card jig and the in-vitro diagnostic equipment work, the reagent card is placed in the cavity of the microfluidic chip, the microfluidic chip is placed on the base, the pressure part of the first pressure part is pressed against the reagent card, and meanwhile, the second surface is mutually abutted against the first surface, so that the pressure between the reagent card and the microfluidic chip can be controlled within a preset range, the pressure can be effectively controlled, and the accuracy of a detection result is ensured. In addition, when the microfluidic chip needs to be taken out and replaced, the first pressing piece is moved away, so that the microfluidic chip and the reagent card can be taken away from the base, and the operation is convenient.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a card pressing jig according to an embodiment of the present invention;

FIG. 2 is an exploded view of the structure shown in FIG. 1;

FIG. 3 is an alternative perspective structural view of the first compression element in the configuration of FIG. 2;

fig. 4 is an enlarged schematic view of fig. 3 at a.

10. Pressing and clamping the jig; 11. a base; 111. a first positioning member; 112. a second positioning member; 12. a first pressing member; 121. a second surface; 122. a pressing part; 1221. avoiding holes; 1222. a third surface; 1223. a fourth surface; 1224. a connection face; 123. a second positioning hole; 124. a third positioning member; 125. a first positioning shaft hole; 13. a second pressing member; 131. a third positioning hole; 132. a fifth positioning hole; 133. a second positioning shaft hole; 14. a first magnetic attraction member; 15. a second magnetic attraction piece; 20. a microfluidic chip; 21. a first surface; 22. a chamber; 23. a first positioning hole; 24. a fourth positioning hole; 30. a reagent card; 31. and a color development layer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Referring to fig. 1 to 4, fig. 1 shows a schematic structural diagram of a card pressing jig 10 according to an embodiment of the present invention, fig. 2 shows an exploded structural diagram of the structure shown in fig. 1, fig. 3 shows another view structural diagram of a first pressing member 12 in the structure shown in fig. 2, and fig. 4 shows an enlarged structural diagram of fig. 3 at a. An embodiment of the present application provides a press card tool 10, press card tool 10 includes: a base 11, and a first presser 12. The base 11 is used for placing the microfluidic chip 20, and the surface of the microfluidic chip 20 opposite to the base 11 is a first surface 21. Wherein, the microfluidic chip 20 is provided with a chamber 22 recessed from the first surface 21, and the chamber 22 is used for placing the reagent card 30. The first pressing member 12 is located above the first surface 21, and the surface of the first pressing member 12 facing the microfluidic chip 20 is set as a second surface 121. The first presser 12 is provided with a pressing portion 122 on the second surface 121. The pressing part 122 is disposed corresponding to the cavity 22, the pressing part 122 is used for pressing against the reagent card 30, and when the pressing part 122 and the reagent card 30 are pressed against each other, the second surface 121 and the first surface 21 are pressed against each other.

In the above-mentioned card pressing fixture 10, during operation, the reagent card 30 is placed in the cavity 22 of the microfluidic chip 20, the microfluidic chip 20 is placed on the base 11, the pressing portion 122 of the first pressing member 12 presses against the reagent card 30, and the second surface 121 and the first surface 21 abut against each other, so that the pressure between the reagent card 30 and the microfluidic chip 20 can be controlled within a preset range, and thus the pressure can be effectively controlled, and the accuracy of the detection result can be ensured. In addition, when the microfluidic chip 20 needs to be taken out and replaced, the first pressing member 12 is removed, so that the microfluidic chip 20 and the reagent card 30 can be taken out of the base 11, and the operation is convenient.

It should be noted that the pressure source of the first pressing element 12 to the microfluidic chip 20 may be a manual pushing manner by an operator, or may be a mechanical driving manner, for example, and the downward pressure of the mechanical mechanism directly or indirectly acts on the first pressing element 12, and the specific manner may be flexibly adjusted and set according to actual requirements, which is not limited herein.

Referring to fig. 2 to 4, in an embodiment, there are a plurality of cavities 22, a plurality of pressing portions 122, and a plurality of pressing portions 122 are disposed in one-to-one correspondence with the plurality of cavities 22. Thus, not only one reagent card 30 but a plurality of reagent cards 30, for example, 2, 3, 10, 13, 20, etc., can be placed on the microfluidic chip 20, and can be respectively and correspondingly pressed on the plurality of reagent cards 30 by the plurality of pressing parts 122 of the first pressing part 12, so that the plurality of reagent cards 30 are fixed on the microfluidic chip 20, and meanwhile, the pressure between each reagent card 30 and the microfluidic chip 20 can be ensured, and the accuracy of the detection result of the plurality of components of the sample can be ensured.

The micro-fluidic chip 20 includes but is not limited to a circle, an ellipse, a square, a pentagon, a hexagon, and other regular shapes and irregular shapes, and can be flexibly adjusted and set according to actual requirements.

In order to ensure a better supporting effect on the microfluidic chip 20, the base 11 and the first presser 12 are shaped to match the shape of the microfluidic chip 20 and are correspondingly arranged in regular shapes such as circles, ellipses, squares, pentagons, hexagons, etc. and irregular shapes.

In one embodiment, the microfluidic chip 20 is provided as a circular or substantially circular plate, and the plurality of chambers 22 are sequentially spaced around the center of the microfluidic chip 20. In this way, when the first pressing member 12 applies a downward force to the microfluidic chip 20, the same or substantially the same pressure can be applied to the reagent cards 30 in the respective chambers 22, so that the accuracy of the detection result of each reagent card 30 can be ensured.

It should be noted that the "substantially" circular plate is not a mathematically strict center plate, but may be a circular plate seen by human eyes.

Referring to fig. 2 to 4, in an embodiment, the pressing portion 122 is provided with an avoiding hole 1221, and the avoiding hole 1221 is disposed corresponding to the color-developing layer 31 of the reagent card 30. Thus, when the pressing portion 122 presses the microfluidic chip 20, the avoiding hole 1221 avoids the color development layer 31, so as to prevent the color development layer 31 from being damaged when being pressed on the color development layer 31. Specifically, the avoiding hole 1221 has a size, for example, larger than or equal to the size of the color-developing layer 31 to completely avoid the color-developing layer 31.

Referring to fig. 2 to 4, in one embodiment, the avoiding hole 1221 extends through the avoiding portion to a surface of the first pressing member 12 facing away from the microfluidic chip 20. Thus, the avoiding hole 1221 is a through hole formed in the first pressing member 12, and plays a role in exhausting air when the avoiding portion is pressed on the reagent card 30.

Referring to fig. 2 to 4, in an embodiment, the pressing portion 122 has a third surface 1222, a fourth surface 1223 and a connecting surface 1224 connecting the third surface 1222 and the fourth surface 1223, the third surface 1222 is spaced from the second surface 121 by a distance H1, the fourth surface 1223 is spaced from the second surface 121 by a distance H2, H1> H2, the third surface 1222 is configured to abut against the reagent card 30, and the fourth surface 1223 is configured to be disposed opposite to the color development layer 31 of the reagent card 30. As such, the pressing portion 122 presses against the reagent card 30 through the third surface 1222, and avoids the color-developing layer 31 of the reagent card 30 through the fourth surface 1223.

Specifically, the third surface 1222 is, for example, a flat surface, but may be shaped to correspond to a portion other than the color-developing layer 31 of the reagent card 30. In this way, when the third surface 1222 is pressed against the reagent card 30, stable pressing of the reagent card 30 can be achieved.

Further, alternatively, the third surface 1222 is provided in two, for example, and the two third surfaces 1222 are connected to the opposite sides of the fourth surface 1223 through the two connection surfaces 1224, respectively. Thus, the two third surfaces 1222 are respectively pressed against the two opposite ends of the reagent card 30, so as to avoid the color layer 31 of the reagent card 30, and the two third surfaces 1222 can stably press the reagent card 30.

In addition, the relief hole 1221 is specifically formed on the fourth surface 1223.

In one embodiment, the connection point of the connection surface 1224 and the third surface 1222 is configured with a chamfer or fillet. In this way, the height difference between the third surface 1222 and the fourth surface 1223 can be reduced to cause the indentation of the reagent card 30.

It should be noted that, when the distance H1 between the third surface 1222 and the second surface 121 is large, the pressing force of the third surface 1222 on the reagent card 30 is large; conversely, when the distance H1 is small, the pressing force of the third surface 1222 against the reagent card 30 is small. In this way, the distance H1 between the third surface 1222 and the second surface 121 can be flexibly adjusted and selected according to the thickness of the actual reagent card 30, so as to adjust the distance H1 to a suitable value, and further to adjust the pressing force of the third surface 1222 against the reagent card 30 to a suitable value.

Referring to fig. 2 to 4, in an embodiment, the card pressing jig 10 further includes a second pressing member 13. The second pressing member 13 is detachably connected to the first pressing member 12, and the second pressing member 13 is configured to be mounted on a lifting mechanism (not shown). Therefore, when the first pressing piece 12 needs to be replaced, the first pressing piece 12 is detached from the second pressing piece 13, and the operation is convenient.

It should be noted that there are many detachable connection manners of the first pressing member 12 and the second pressing member 13, including but not limited to a magnetic suction manner, a snap connection manner, a connection manner by a mounting member such as a screw, a pin, a rivet, etc., and other manners may also be used, which are not described herein again.

Referring to fig. 2 and 3, in one embodiment, the first pressing member 12 is provided with at least one first magnetic attraction member 14, and the second pressing member 13 is provided with a second magnetic attraction member 15 magnetically engaged with the first magnetic attraction member 14.

Alternatively, the first magnetic attracting element 14 is not limited to one, and may be, for example, 2, 3, 4, 6, or other values. Likewise, the second magnetic attracting element 15 is not limited to one, and may be, for example, 2, 3, 4, 6, or other values. The second magnetic parts 15 and the first magnetic parts 14 are arranged in a one-to-one correspondence.

It should be noted that, in order to achieve the magnetic attraction of the first magnetic attraction element 14 and the second magnetic attraction element 15, at least one of the first magnetic attraction element 14 and the second magnetic attraction element 15 is a magnetic element, and the other is a magnetic element or an iron element.

Referring to fig. 2 and 3, in one embodiment, the first magnetic attracting element 14 is disposed completely inside the first pressing element 12, and the second pressing element 13 is disposed completely inside the second pressing element 13.

It should be noted that, the first magnetic attraction member 14 is completely disposed inside the first pressing member 12, which means that the first magnetic attraction member 14 does not protrude out of the surface of the first pressing member 12, so as to avoid interference caused by the pressing operation of the pressing part 122 and the reagent card 30 by the first magnetic attraction member 14. Similarly, the second magnetically attractive element 15 is completely disposed inside the second pressing member 13, which means that the second magnetically attractive element 15 does not protrude beyond the surface of the second pressing member 13, thereby ensuring that the first pressing member 12 and the second pressing member 13 are well adhered to each other.

In one embodiment, to reduce the number of openings in the first compression member 12, the first magnetically attractive element 14 is disposed within the relief hole 1221. In order to ensure that the avoiding hole 1221 can exert its own air exhausting function, the first magnetic member 14 is provided with air holes penetrating through two opposite surfaces thereof.

Of course, as some alternatives, for example, the first magnetically attracted member 14 partially protrudes into the upper region of the first compression member 12 (i.e., the region of the first compression member 12 facing the second compression member 13), and the portion protruding into the upper region of the first compression member 12 can enter the interior of the second compression member 13. For another example, the second magnetically attracting member 15 partially protrudes to the lower region of the second presser 13 (i.e., the region of the second presser 13 facing the first presser 12), and the portion of the region protruding to the lower region of the second presser 13 can enter the inside of the first presser 12.

Referring to fig. 2 and 3, in one embodiment, the base 11 is provided with a first positioning member 111, and the microfluidic chip 20 is provided with a first positioning hole 23 corresponding to the first positioning member 111. The first presser 12 is provided with a second positioning hole 123 corresponding to the first positioning member 111. The second pressing member 13 is provided with a third positioning hole 131 corresponding to the first positioning member 111. The middle part of the base 11 is provided with a second positioning element 112, and the middle part of the microfluidic chip 20 is provided with a fourth positioning hole 24 corresponding to the second positioning element 112. At least one third positioning member 124 is disposed on the first pressing member 12, and a fifth positioning hole 132 corresponding to the third positioning member 124 is disposed on the second pressing member 13.

In addition, optionally, a first positioning shaft hole 125 is further provided in the middle portion of the first presser 12 for positioning. In addition, a second positioning shaft hole 133 is further formed in the middle of the second pressing member 13, and plays a positioning role.

Referring to fig. 1 to 3, in an embodiment, an in vitro diagnostic apparatus includes the card pressing fixture 10 of any one of the embodiments, a microfluidic chip 20 and a reagent card 30, wherein the microfluidic chip 20 is disposed on a base 11, and the reagent card 30 is disposed in a chamber 22.

When the in-vitro diagnostic device works, the reagent card 30 is placed in the cavity 22 of the microfluidic chip 20, the microfluidic chip 20 is placed on the base 11, the pressing part 122 of the first pressing part 12 presses against the reagent card 30, and the second surface 121 and the first surface 21 are mutually abutted, so that the pressure between the reagent card 30 and the microfluidic chip 20 can be controlled within a preset range, and the pressure can be effectively controlled, and the accuracy of a detection result can be ensured. In addition, when the microfluidic chip 20 needs to be taken out and replaced, the microfluidic chip 20 and the reagent card 30 can be taken out of the base 11 by removing the first pressing member 12, and the operation is convenient.

In one embodiment, the extracorporeal diagnostic apparatus further comprises a lifting mechanism. The lifting mechanism is connected with the first pressing piece 12 and is used for driving the first pressing piece 12 to move up and down.

Specifically, the lifting mechanism is connected to the second presser 13, that is, to the first presser 12 via the second presser 13. The second pressing member 13 is detachably mounted on the lifting mechanism, and the appropriate second pressing member 13 and the first pressing member 12 can be flexibly replaced according to actual requirements.

It should be noted that the "first positioning element 111 and the second positioning element 112" may be "a part of the base 11", that is, the "first positioning element 111, the" second positioning element 112 "and" the other part of the base 11 "are integrally formed; or, the "first positioning member 111 and the second positioning member 112" may be made separately from the "other parts of the base 11" and combined with the "other parts of the base 11" into a whole.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Claims (10)

1. The utility model provides a press card tool which characterized in that, press card tool includes:

the base is used for placing the microfluidic chip; and

the first pressing piece is positioned above the first surface of the microfluidic chip, the surface of the first pressing piece facing the first surface is set as a second surface, the first pressing piece is provided with a pressing part positioned on the second surface, the pressing part is arranged corresponding to the cavity of the microfluidic chip and presses against the reagent card in the cavity, and when the pressing part and the reagent card are pressed against each other, the second surface and the first surface are pressed against each other.

2. The card pressing jig according to claim 1, wherein the number of the cavities is plural, the number of the pressing portions is plural, and the plurality of the pressing portions and the plurality of the cavities are arranged in one-to-one correspondence.

3. The card pressing jig according to claim 1, wherein the pressing portion is provided with an avoiding hole, and the avoiding hole is used for being arranged corresponding to the color development layer of the reagent card.

4. The card pressing jig according to claim 3, wherein the avoiding hole extends from the pressing portion to a surface of the first pressing member facing away from the microfluidic chip.

5. The card pressing jig according to claim 1, wherein the pressing portion is provided with a third surface, a fourth surface and a connecting surface connecting the third surface and the fourth surface, the third surface is at a distance H1 from the second surface, the fourth surface is at a distance H2 from the second surface, H1> H2, the third surface is used for abutting against the reagent card, and the fourth surface is used for being arranged opposite to the color development layer of the reagent card.

6. The card pressing jig of claim 1, further comprising a second pressing member, wherein the second pressing member is detachably connected to the first pressing member, and the second pressing member is configured to be mounted on the lifting mechanism.

7. The card pressing jig according to claim 6, wherein the first pressing member is provided with a first magnetic attraction member, and the second pressing member is provided with a second magnetic attraction member magnetically engaged with the first magnetic attraction member.

8. The card pressing jig according to claim 6, wherein the base is provided with a first positioning member, the microfluidic chip is provided with a first positioning hole corresponding to the first positioning member, the first pressing member is provided with a second positioning hole corresponding to the first positioning member, and the second pressing member is provided with a third positioning hole corresponding to the first positioning member; a second positioning piece is arranged in the middle of the base, and a fourth positioning hole matched with the second positioning piece is arranged in the middle of the microfluidic chip; the first pressing piece is provided with at least one third positioning piece, and the second pressing piece is provided with a fifth positioning hole corresponding to the third positioning piece.

9. An in-vitro diagnostic device, comprising the card pressing jig according to any one of claims 1 to 8, a microfluidic chip and a reagent card, wherein the microfluidic chip is placed on the base, the surface of the microfluidic chip, which is opposite to the base, is set as a first surface, the microfluidic chip is provided with a cavity which is recessed inwards from the first surface, and the reagent card is placed in the cavity.

10. The in-vitro diagnostic apparatus according to claim 9, further comprising a lifting mechanism connected to the first pressing member for driving the first pressing member to move up and down.

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