Detection instrument and reaction unit thereof

Abstract

The utility model discloses a reaction unit, reaction unit including reagent disc and sealing membrane, the reagent disc is equipped with a plurality of cavities, a plurality of the top of cavity is equipped with the opening, be equipped with the mounting panel in the cavity, the outside mounting of mounting panel has the recess of first material, the top of mounting panel with the top opening of cavity is in alignment and is equipped with the flow guide structure, the flow guide structure with recess intercommunication. The sealing membrane with the top surface sealed connection of reagent disc and sealed the top opening of cavity.

Description

Technical Field

[0001] This utility model relates to the field of detection equipment technology, and in particular to a detection instrument and its reaction unit. Background Technology

[0002] The testing instrument requires the mixing of at least two reactants for detection, and generally, multiple tests are required. Taking a urine analyzer as an example, a home urine analyzer includes a reagent kit containing multiple reagents. These multiple reagents need to be drawn into a common flow channel and mixed with the sample before the mixed solution is tested.

[0003] However, mixing reagents and samples can contaminate the common flow path, affecting subsequent uses. Therefore, cleaning equipment is required, which increases the manufacturing cost of the entire device. Furthermore, accurately quantifying the reagents each time presents a challenge in manufacturing the equipment. If test strips are used, the operation is inconvenient, requiring either placing the test strip into the instrument or dripping the sample onto the strip. Utility Model Content

[0004] The purpose of this invention is to provide a detection instrument and its reaction unit to solve the problems of the prior art.

[0005] To address the aforementioned technical problems, embodiments of this utility model provide a reaction unit, the reaction unit comprising:

[0006] A reagent tray having multiple cavities, each cavity having an opening at its top. A mounting plate is installed within each cavity, and a groove for a first substance is mounted on the outer side of the mounting plate. The top of the mounting plate is aligned with the top opening of the cavity and has a flow guiding structure communicating with the groove.

[0007] A sealing membrane is provided, which is sealed to the top surface of the reagent tray and seals the top opening of the cavity.

[0008] In one embodiment, the reagent tray is cylindrical;

[0009] The plurality of the cavities are evenly arranged around the circumference of the reagent disk.

[0010] In one embodiment, the cavity is provided with a window that opens toward the radially outer side of the reagent tray;

[0011] The reaction unit also includes a side cover made of a light-transmitting material, which covers the window.

[0012] In one embodiment, the width of the inner wall of the flow guiding structure gradually increases from top to bottom.

[0013] In one embodiment, the outer radial side of the reagent tray is a cylinder, and the inner side is a polygonal prism.

[0014] This utility model also relates to a testing instrument, the testing instrument comprising:

[0015] Main unit;

[0016] The aforementioned reaction unit is rotatably connected to the main body unit about a vertical axis;

[0017] A pipetting unit is connected to the main unit and is equipped with a needle that can operatively pierce the sealing membrane and move into or out of the cavity through the upper opening of the reaction unit cavity to deliver a second substance to multiple cavities.

[0018] In one embodiment, the detection instrument further includes a mounting base and a first drive unit;

[0019] The mounting base is connected to the output shaft of the first drive unit;

[0020] The reaction unit is detachably connected to the mounting base;

[0021] The first driving unit is connected to the main body unit and can operably drive the reaction unit to rotate about a vertical axis.

[0022] In one embodiment, the pipetting unit includes a transfer device;

[0023] The needle is movably connected to the transfer device in a vertical direction and has a head end and a tail end. The head end is provided with a needle tip and can pierce the sealing membrane and enter the cavity through the upper opening of the reaction unit cavity. The tail end is connected to the collection cavity where the second substance is placed.

[0024] In one embodiment, the cavity is provided with a window that opens toward the radially outer side of the reagent tray;

[0025] The reaction unit also includes a side cover made of a light-transmitting material, which covers the window;

[0026] The detection instrument also includes an analysis unit;

[0027] The windows of the plurality of cavities are operatively aligned with the analysis unit.

[0028] In one embodiment, the first substance comprises a plurality of test strips;

[0029] Multiple test strips are operatively aligned with the analysis unit.

[0030] The cavity of the reaction unit of this invention can be used to place test strips. It is sealed with a sealing film. Each time a test is performed, the sealing film is punctured and the sample is introduced into the cavity for testing, which is very convenient. Attached Figure Description

[0031] Figure 1 and Figure 2 This is a perspective view of an inspection instrument according to an embodiment of the present invention.

[0032] Figure 3 yes Figure 1 Exploded view of the detection instrument in the illustrated embodiment.

[0033] Figure 4 yes Figure 1 Assembly diagram of the mounting base and quick-release assembly in the illustrated embodiment.

[0034] Figure 5 yes Figure 4 A cross-sectional view of the mounting base and quick-release element along line AA in the illustrated embodiment.

[0035] Figure 6 , Figure 7 and Figure 8 They are Figure 4 Exploded view of the mounting base and quick-release mechanism in the illustrated embodiment.

[0036] Figure 9 yes Figure 1 Exploded view of the reaction unit in the illustrated embodiment.

[0037] Figure 10 yes Figure 9 A perspective view of the mounting plate in the illustrated embodiment.

[0038] Figure 11 yes Figure 1 Exploded view of the detection instrument in the illustrated embodiment.

[0039] Figure 12 yes Figure 1 Exploded view of the pipetting unit and the main body unit in the illustrated embodiment.

[0040] Figure 13 yes Figure 1 Assembly diagram of the main unit and the pipetting unit in the embodiment shown.

[0041] Figure 14 Figure 1 A perspective view of the transfer device of the illustrated embodiment.

[0042] Figure 15 yes Figure 14 The cross-sectional view along line BB after the transfer device, pin, moving block and second elastic element are assembled in the embodiment shown.

[0043] Figure 16 yes Figure 1 A perspective view of the transfer device of the illustrated embodiment.

[0044] Figure 17 yes Figure 16 A cross-sectional view of the transfer device along line CC in the illustrated embodiment.

[0045] Reference numerals: 100, Detection instrument; 1, Main body unit; 11, Base plate; 12, First side plate; 13, Second side plate; 2, Reaction unit; 21, Reagent tray; 22, Sealing membrane; 23, Mounting plate; 24, Flow guiding structure; 25, Cavity; 26, Top opening; 27, Side cover; 28, Test paper; 3, Analysis unit; 4, Pipette unit; 41, Transfer device; 411, Moving channel; 412, First opening; 413, Second opening; 414, First section; 415, Second section; 416, Third section; 42, Needle; 421, Head end; 422, Tail end; 43, Moving block; 431, Adapter cavity; 44, Magnet; 45, Coil; 46, Adapter tube; 47, Second elastic element; 48, Rotating body; 481, Support column; 482. U-shaped groove; 483. First roller; 484. Second roller; 491. First N-magnet; 492. First S-magnet; 493. Second N-magnet; 494. Second S-magnet; 5. First drive unit; 6. Mounting base; 61. Prism; 611. Mounting groove; 62. Support plate; 621. Support surface; 63. Cover plate; 631. First clearance hole; 632. Second clearance hole; 633. Third clearance hole; 64. First elastic element; 7. Quick release element; 71. Rotating shaft; 72. Limiting element; 721. Pressing surface; 722. Limiting surface; 723. First edge; 724. Second edge; 73. First reset element; 74. Pressing part; 741. Top plate; 742. Pressing foot; 743. Countersunk hole; 744. Screw with shoulder; Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0047] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0048] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative of the essential spirit of the technical solution of the present invention.

[0049] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0050] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0051] In the following description, in order to clearly demonstrate the structure and working method of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0052] This invention relates to a detection instrument 100, which includes a main unit 1, a reaction unit 2, an analysis unit 3, and a pipetting unit 4. The main unit 1 is used to house the reaction unit 2, the analysis unit 3, and the pipetting unit 4. The reaction unit 2 has multiple reaction sites for holding a first substance. The pipetting unit 4 is used to transfer a second substance to the reaction sites of the reaction unit 2 to facilitate the reaction between the second substance and the first substance. The analysis unit 3 is used to perform optical detection on the reaction between the first substance and the second substance.

[0053] The second substance can be one or more of the following: urine sample, blood sample, buffer solution, washing solution, catalyst, marker, etc. The first substance can be a reagent that reacts with the sample, multiple test strips 28 that react with the sample, or another reagent that reacts with the reagents at the aforementioned reaction sites. That is to say, the detection instrument 100 can be used to detect the products after the reaction of the sample and reagents, or it can be used for reactions with two or more reagents. This detection instrument is not only used for urine testing, but also for blood testing, environmental water sample testing, food safety testing, etc.

[0054] exist Figure 1 and Figure 2In the embodiment shown, the detection instrument 100 is a urine analyzer, the second substance is test strip 28 or reagent, and the first substance is the sample, namely urine.

[0055] by Figure 1 and Figure 2 As an example, the main body unit 1 of the detection instrument 100 includes at least one base plate 11, which is used to mount the reaction unit 2 and the pipetting unit 4.

[0056] The reaction unit 2 is rotatably connected to the base plate 11 of the main unit 1 through a driving unit. This driving unit is defined as the first driving unit 5, which is a motor. Its output shaft can rotate around a vertical axis. In other words, the reaction unit 2 can rotate around a vertical axis through the first driving unit 5.

[0057] The motor is fixedly connected to the base plate 11, and the output shaft of the motor is fixedly connected to a mounting base 6. The mounting base 6 is used to install the reaction unit 2, which facilitates the disassembly and assembly of the reaction unit 2. The reaction unit 2 is a consumable. After the test strips 28 or reagents in the multiple reaction positions 25 of the reaction unit 2 are used up, it can be removed from the mounting base 6 and replaced with a new reaction unit 2. The mounting base 6 is mainly used to facilitate the quick disassembly or assembly of the reaction unit 2.

[0058] like Figure 3 and Figure 4 As shown, the mounting base 6 includes a prism 61 and a support plate 62 fitted around the outside of the prism 61. The prism 61 is a hexagonal prism, but it can also be a square prism, pentagonal prism, or other prism. The support plate 62 is annular and located at the bottom end of the prism 61, with its top surface serving as a support surface 621. The reaction unit 2 is a columnar structure fitted radially outside the prism 61, and it is located on the top surface of the support surface 621. In other words, the support surface 621 is used to support the reaction unit 2, as will be described in detail below.

[0059] The center of the prism 61 is connected to the outside of the motor's output shaft and is fixedly connected to the output shaft, while a quick-release piece 7 is provided on the radially outer side.

[0060] The quick-release element 7 is connected to the mounting base 6, and the quick-release element 7 can switch between a first state, a second state, and a third state. In the first state, the quick-release element 7 can prevent the reaction unit 2 from detaching from the mounting base 6. In the second state, the quick-release element 7 is detached from the reaction unit 2, and the reaction unit 2 can be detached from or installed on the mounting base 6. In the third state, the reaction unit 2 is detached from the mounting base 6.

[0061] exist Figure 5In the specific embodiment shown, the prism 61 has two mounting slots 611 on its radially outer side, and two quick-release pieces 7 are located in the two mounting slots 611 respectively. Since the structures of the two quick-release pieces 7 and their assembly methods with the inner walls of the mounting slots 611 are the same, one quick-release piece 7 and the mounting slot 611 are taken as an example.

[0062] The mounting groove 611 opens radially outward toward the prism 61. The quick-release component 7 includes a pivot 71, a limiting member 72, a first reset member 73, and a pressing part 74. The pivot 71 is fixed to the inner wall of the mounting groove 611, while the limiting member 72 is located inside the mounting groove 611 and connected to the pivot 71. Alternatively, the pivot 71 can be rotatably connected to the inner wall of the mounting groove 611, while the limiting member 72 is fixedly connected to the pivot 71, as long as the pivot 71 can rotate.

[0063] The pressing part 74 is provided at the top of the prism 61, and the pressing part 74 drives the limiting member 72 to move into the mounting groove 611.

[0064] Specifically, such as Figure 6 and Figure 7 As shown, the mounting groove 611 extends toward the top surface of the prism 61 and opens toward the top surface of the prism 61. The top surface of the prism 61 is provided with a cover plate 63, which covers the top surface of the prism 61 and is movable in the vertical direction.

[0065] The cover plate 63 is provided with a first clearance hole 631, two second clearance holes 632 and a plurality of third clearance holes 633. The first clearance hole 631 is close to the center of the cover plate 63. The two second clearance holes 632 are aligned with the two mounting grooves 611 in the vertical direction respectively. The plurality of third clearance holes 633 can be evenly distributed on the outer periphery of the cover plate 63 or scattered on the cover plate 63. The specific position of the third clearance holes 633 is not limited.

[0066] The pressing part 74 includes a top plate 741 and a pressing foot 742 connected to the bottom end of the top plate 741. The top plate 741 is located above the cover plate 63 and is provided with a countersunk hole 743. Figure 8 As shown, the countersunk hole 743 is aligned with the first clearance hole 631. The head of the shoulder screw 744 is located inside the countersunk hole, and the smooth part of the shoulder screw 744 passes through the countersunk hole 743 and the first clearance hole 631, and is threadedly connected to the prism 61. It should be understood that the shoulder screw 744 does not lock the top plate 741 and the cover plate 63 in place. After the screw and the prism 61 are fixedly connected, the top plate 741 can still move in the vertical direction.

[0067] The top ends of several springs are connected to the bottom surface of the top plate 741, and the bottom ends pass through multiple third clearance holes 633 and are fixedly connected to the prism 61. The springs can push the top cover to move upward.

[0068] Two pressure feet 742 are connected to the top surface of the top plate 741, and their bottom ends pass through two second clearance holes 632 into the mounting grooves 611, respectively, and press against the pressing surfaces 721 of the two limiting members 72 in the two mounting grooves 611. Pressing the top plate 741 can drive the two pressure feet 742 to move downwards, and the two pressure feet 742 drive the limiting members 72 to rotate toward the inside of the mounting grooves 611, which facilitates the removal or installation of new reaction units 2.

[0069] Of course, in other embodiments, the cover plate 63 may not be provided, and the pressing part 74 may be elastically connected to the top surface of the prism 61 by several springs, which can achieve the same effect.

[0070] The support surface 621 is provided with multiple first elastic elements 64, each of which is a spring. The bottom end of the spring is connected to the support surface 621, and the top end is suspended above the support surface 621. In the first state, that is, after the reaction unit 2 is installed on the prism 61, the outer end of the limiting member 72 is located outside the mounting base 6 and abuts against the top end of the reaction unit 2. Specifically, the reaction unit 2 is located between the support plate 62 and the limiting member 72. The bottom end of the reaction unit 2 will squeeze the first elastic element 64, and the top end will abut against the limiting member 72, clamping the reaction unit 2, making the reaction unit 2 more stable and preventing the reaction unit 2 from detaching from the prism 61.

[0071] In the second state, pressing down on the pressing part causes the outer end of the limiting member 72 to retract into the mounting groove 611, allowing the reaction unit 2 to move upward and be disassembled from the prism 61, or a new reaction unit 2 to be installed from top to bottom on the outside of the prism 61.

[0072] In the third state, when the pressing part is released, the outer end of the limiting member 72 is located at the outer end of the mounting groove 611, the reaction unit is completely disengaged from the mounting base, and the first elastic member 64 is in a natural state.

[0073] The first reset member 73 is connected to the limiting member 72 or the mounting base 6 and is used to drive the outer end of the limiting member 72 to rotate toward the outside of the mounting groove 611. That is to say, in the first state, the first reset member 73 can push the outer end of the limiting member 72 to rotate toward the outside of the prism 61, so that the outer end of the limiting member 72 presses the top of the reaction unit 2. The external force acts on the limiting member 72, so that the limiting member 72 resists the force of the first reset member 73 and retracts back into the mounting groove 611, so that the reaction unit 2 can be disassembled from the prism 61 or installed on the prism 61.

[0074] In one embodiment, such as Figure 5 As shown, the limiting member 72 is in the shape of a triangular prism, with one of its edges located in the mounting groove 611 and connected to the rotating shaft 71. This edge is defined as the first edge 723. The other edge can rotate to the outside of the prism 61 and is defined as the second edge 724.

[0075] The triangular prism has three faces on its radial outer side, with the two faces forming the second angle 724 defined as the pressing face 721 and the limiting face 722.

[0076] In an optional embodiment, in the first state, the pressing surface 721 is located on the top surface of the limiting surface 722, and is an inclined surface that gradually moves away from the radially outer side of the prism 61 from top to bottom, that is, the distance between the pressing surface 721 and the prism 61 gradually increases from top to bottom. When the reaction unit 2 is installed, its bottom end abuts against the pressing surface 721, driving the limiting member 72 to rotate toward the mounting groove 611. When the second edge 724 of the limiting member 72 is fully rotated into the mounting groove 611, the reaction unit 2 is fitted onto the outside of the prism 61. Then, the limiting member 72 is driven by the first reset member 73 to rotate from the mounting groove 611 to the outside of the prism 61, and the limiting surface 722 abuts against the top of the reaction unit 2, locking the reaction unit 2.

[0077] In another embodiment, in the first state, the distance between the limiting surface 722 and the radial outer side of the prism 61 gradually increases from bottom to top. The limiting surface 722 is also an inclined surface. When the reaction unit 2 needs to be disassembled, the operator moves the reaction unit 2 from bottom to top. The top of the reaction unit 2 drives the limiting member 72 to move toward the mounting groove 611 through the limiting surface 722. After the second edge 724 of the limiting member 72 is completely turned into the mounting groove 611, the reaction unit 2 can be disassembled from the prism 61.

[0078] In other alternative embodiments, the pressing surface 721 or the limiting surface 722 can also be an arc surface. When both the pressing surface 721 and the limiting surface 722 are arc surfaces, the second angle 724 formed by the pressing surface 721 and the limiting surface 722 is not obvious, but it does not affect the movement of the limiting reaction unit 2.

[0079] exist Figure 6 and Figure 7 In the embodiment shown, the triangular prism is a regular triangular prism, that is, the three edges of the triangular prism are basically the same. In the first state, the distance between the limiting surface 722 and the radial outer side of the prism body 61 gradually increases from bottom to top, while the pressing surface 721 is a horizontal surface.

[0080] The first reset member 73 is an elastic member installed on the rotating shaft 71. The elastic member is a torsion spring. One end of the torsion spring is fixedly connected to the limiting member 72, and the other end abuts against the inner wall of the mounting groove 611. The torsion spring can drive the second edge 724 of the limiting member 72 to move toward the outside of the mounting groove 611.

[0081] The reaction unit 2 includes a reagent tray 21, a mounting plate 23, a side cover 27, and a sealing film 22. As a preferred embodiment, the radial inner hole of the reagent tray 21 is hexagonal prism-shaped, and the radial outer surface is cylindrical.

[0082] The shape of the radially inner side of the reagent tray 21 is complementary to the radially outer side of the mounting base 6, thereby allowing the mounting base 6 to drive the reaction unit 2 to rotate about a vertical axis. It should be understood that in other embodiments, the reaction unit 2 may also be directly connected to the output shaft of the motor.

[0083] Understandably, the radial outer side of the mounting base 6 can also be other polygonal prisms, and the mounting base 6 can also be a cylinder. However, at least one part of the cylinder is provided with a protrusion extending in the vertical direction or a notch extending in the vertical direction. That is to say, in the radial outer side of the mounting base 6, at least two areas are at different distances from the center. The radial inner side of the reagent tray 21 is complementary to the radial outer side of the mounting base 6, that is, at least two areas of the radial inner side of the reagent tray 21 are at different distances from the center, so as to prevent the mounting base 6 from rotating independently relative to the reagent tray 21.

[0084] In the embodiment shown in the figure, multiple reaction sites are cavities 25. It should be understood that in other embodiments, reaction sites may also be holes, slots, or other micro-reaction units.

[0085] Multiple cavities 25 are evenly arranged circumferentially along the reagent disk 21 and are formed by radial indentations on the outer side of the reagent disk 21, such as... Figure 9 As shown, the side cover 27 is installed at the outer opening of the cavity 25, and the side cover 27 is made of a light-transmitting material to facilitate light to be projected into the cavity 25 from inside the side cover 27.

[0086] Multiple mounting plates 23 are respectively installed in multiple cavities 25. Each mounting plate 23 is provided with a groove and a flow guiding structure 24. The groove faces the outer side of the mounting plate 23 and is correspondingly arranged with the side cover 27 for installing the test paper 28. Figure 10 As shown, the flow guiding structure 24 is aligned with the top of the mounting plate 23 and the top opening 26 of the wall. The flow guiding structure 24 is a flow guiding channel that communicates with the groove, and the width of the inner wall gradually increases from top to bottom. The sample enters the flow guiding channel from the top opening 26 of the cavity 25 and flows into the test paper 28 in the groove through the flow guiding structure 24, ensuring that all the sample flows into the test paper 28 and avoiding waste.

[0087] The pipetting unit 4 is connected to the base plate 11 and is used to deliver samples into the multiple chambers 25 of the reaction unit 2. Therefore, it can be understood that relative movement between the pipetting unit 4 and the reaction unit 2 can complete the delivery of samples into the multiple chambers 25. If the reaction unit 2 is fixedly connected to the base plate 11, the pipetting unit 4 can also deliver samples into the multiple chambers 25 by moving relative to the reaction unit 2. For example, the pipetting unit can be configured to move relatively to the reaction unit, the reaction disk can be arranged in a strip shape, and the multiple chambers 25 can be arranged at intervals along the length of the reaction disk. The pipetting unit 4 can move along the length of the reaction disk, thereby delivering samples into the multiple chambers 25.

[0088] In another embodiment, the reaction unit is also cylindrical and hollow, with multiple reaction sites arranged circumferentially. The pipetting unit can be placed at the center of the reaction unit and configured to allow the reaction unit to rotate relative to it. For example, the pipetting unit can rotate around a vertical axis. During the rotation of the pipetting unit, the second substance can be transported to multiple reaction sites.

[0089] In another embodiment, the pipetting unit is rotatably connected to the main unit, and the reaction unit is rotatably connected to the main unit about a vertical axis. The reaction position of the pipetting unit, which moves away from or closer to the reaction unit during the swinging process, is configured to swing relative to the reaction unit.

[0090] Of course, in some embodiments, the pipetting unit can be configured to move along a horizontal axis. When detection is required, the pipetting unit approaches the reaction unit, and the reaction unit rotates around a vertical axis. During the rotation of the reaction unit, multiple reaction sites approach the pipetting unit one by one, facilitating the pipetting unit to deliver the second substance to the multiple reaction sites. When the reaction unit needs to be disassembled, the pipetting unit is moved along the horizontal axis and away from the reaction unit.

[0091] exist Figure 11 and Figure 12 In the illustrated embodiment, the pipetting unit 4 includes a transfer device 41 and a needle 42. The transfer device 41 has a vertically extending moving channel 411, with a first opening 412 and a second opening 413 at its two ends. The first opening 412 is located at the bottom and aligned with the top opening 26 of the cavity 25. The needle 42 is movably installed within the moving channel 411, with its head end 421 located at the first opening 412 and its tail end 422 located at the second opening 413. The tail end 422 of the needle 42 communicates with the sample collection cavity, and the head end 421 of the needle 42 is needle-tipped to facilitate piercing the sealing membrane 22 and entering the cavity 25.

[0092] The pin 42 can move vertically within the moving channel 411. During the movement, the head end 421 of the pin 42 can pierce the sealing membrane 22 and move into or out of the cavity 25 through the top opening 26 of the cavity 25.

[0093] Alternatively, in other embodiments, the needle 42 may be configured to move in a horizontal direction, with the top opening 26 of the cavity 25 located radially outside the reagent tray 21 and sealed by a sealing membrane 22. The needle 42 may penetrate the cavity 25 through the sealing membrane 22 and deliver the sample into the cavity 25.

[0094] exist Figure 16 and Figure 17In the specific embodiment shown, the moving channel 411 extends vertically, the first opening 412 opens toward the bottom of the moving device, and the second opening 413 is located on the side of the moving device.

[0095] The moving channel 411 includes a first segment 414, a second segment 415, and a third segment 416 arranged vertically from top to bottom and connected to each other. A second opening 413 is located at the first segment 414, and a first opening 412 is located at the third segment 416. The first segment 414 is a quadrangular prism, while the second segment 415 and the third segment 416 are both cylinders. The width of the first segment is greater than the diameter of the second segment 415, and the diameter of the second segment 415 is greater than the diameter of the first end.

[0096] The pipetting unit 4 also includes a moving block 43, a second driving unit, and a second elastic element 47, wherein, as Figure 15 As shown, the movable block 43 is used to connect the pin 42 and drive the pin 42 to move in the vertical direction. The second driving unit is used to drive the movable block 43 to move in the vertical direction, while the second elastic element 47 is used to drive the movable block 43 to drive the pin 42 to move upward, that is, to move away from the reaction position 25.

[0097] Specifically, the movable block 43 is a rectangular block that is vertically movable and installed within the first section 414. The movable block 43 has an L-shaped adapter cavity 431. One end of the L-shaped adapter cavity 431 is open towards the bottom of the movable block 43 and is used to connect the tail end 422 of the insertion pin 42. The other end of the L-shaped adapter cavity 431 is open towards the side of the movable block 43 and aligned with the second opening 413, for connecting the adapter tube 46. The adapter tube 46 can also extend into the L-shaped adapter cavity 431 and communicate with the tail end 422 of the insertion pin 42. The adapter tube 46 can move up and down with the movable block 43. The second opening 413 is mainly to avoid the adapter tube 46. The adapter tube 46 is used to communicate with a collection chamber containing a second substance, such as a sample collection chamber.

[0098] It should be understood that the transfer tube can be equipped with a peristaltic pump, a plunger pump, or a piezoelectric micropump, through which the second substance is transported to the reaction site of the reaction unit.

[0099] The pipetting unit 4 also includes a second elastic element 47, which is installed in the moving channel 411 and can operably drive the needle 42 to move upward.

[0100] The movable block 43 is movably installed within the first segment 414; the top end of the elastic member is located in the first segment 414 and connected to the movable block 43, and the bottom end is located in the second segment 415 and connected to the bottom wall of the bottom end.

[0101] The second driving unit includes a magnet 44 and a coil 45, such as Figure 15As shown, the top of the movable block 43 is provided with a slot for mounting the magnet 44, and the coil 45 is connected to the top wall of the first segment 414. Of course, the magnet 44 can also be connected to the top wall of the first segment 414, and the coil 45 can be wound in the slot at the top of the movable block 43, without limiting the specific implementation of the second drive unit.

[0102] The top end of the pin 42 is located in the first section 414 and inserted into the adapter cavity 431. The bottom end extends from the second section 415 to the third section 416. As the moving block 43 moves up and down, when the moving block 43 moves downward, it can drive the pin 42 to pierce into the cavity 25. When it moves upward, it can drive the pin 42 to move into the third section 416.

[0103] The second elastic element 47 is a spring fitted around the outside of the pin 42. The top end of the second elastic element 47 is connected to the top of the moving block 43, and the bottom end is located inside the second section 415 and connected to the bottom wall of the second section 415. The second elastic element 47 has the force to drive the pin 42 upward away from the cavity 25. That is, when the coil 45 is not energized, the second elastic element 47 can ensure that the pin 42 will not protrude outside the moving channel 411. Of course, the second elastic element 47 can also be directly installed outside the pin 42, without being connected to the moving block 43 or the bottom wall of the second section 415, and can still drive the pin 42 to move upward.

[0104] Since the diameter of the second segment 415 is larger than the diameter of the third segment 416, it will restrict the second elastic member 47 from entering the third segment 416, thus preventing it from leaving the moving channel 411 from the third segment 416.

[0105] Of course, in some embodiments, the moving device can be configured as a vertical column, with the second opening 413 located on the top surface of the transfer device 41. The coil 45 can be directly mounted on the inner wall of the moving channel 411, and a magnet 44 is sleeved on the pin 42. The coil 45 and the magnet 44 cooperate to drive the pin 42 to move vertically. Optionally, the pin 42 can also be movably connected to the transfer device 41 via a guide rail, without limiting the specific implementation of the pin 42 and the moving device.

[0106] In some embodiments, if the reaction unit 2 does not need to be disassembled, the pipetting unit 4 can be fixedly disposed above the reaction unit 2. When the cavity 25 is rotated to the position below the needle 42 of the pipetting unit 4, the needle 42 inputs the sample into the cavity 25. By continuously rotating the reaction unit, the sample can be input into multiple cavities 25 until all the reagents or test strips 28 in all cavities 25 are used up.

[0107] In some preferred embodiments, the reaction unit 2 is configured as a disposable consumable. After each reaction unit 2 is used up, it can be removed from the mounting base 6 and replaced with a new reaction unit 2. The mounting base 6, the first drive unit 5, and the pipetting unit 4 can all be reused to avoid waste.

[0108] Alternatively, in order to disassemble reaction unit 2, pipetting unit 4 can be disassembled first, and then reaction unit 2 can be disassembled. However, this operation is more complicated and inconvenient.

[0109] To facilitate quick disassembly and reassembly of the reaction unit 2, the pipetting unit 4 is preferably configured to be rotatable. The pipetting unit 4 is rotatably connected to the main body unit 1 about a horizontal axis. The pipetting unit 4 can rotate between a first position and a second position. In the first position, the pipetting unit 4 can deliver the second substance into the cavity 25. In the second position, the reaction unit 2 can be disassembled and reassembled from the main body unit 1.

[0110] like Figure 11 and Figure 12 As shown, the pipetting unit 4 includes a rotating body 48, a support column 481, a third drive unit, and a fourth drive unit.

[0111] The rotating body 48 is plate-shaped and its bottom end is rotatably connected to the bottom plate 11 of the main body unit 1 via a shaft. The support column 481 is also plate-shaped and is installed on the top surface of the rotating body 48 and offset from the position of the reaction unit 2. The support column 481 and the rotating body 48 are integrally L-shaped, and the top of the support column 481 is fixedly connected to the bottom surface of the transfer device 41. The bottom wall of the transfer device 41, the side wall of the support column 481 and the top wall of the rotating body 48 cooperate to form a U-shaped groove 482.

[0112] In the first position, the rotating body 48 is in a vertical state, and the radial outer edge of the reaction unit 2 is located in the U-shaped groove 482. At this time, the transfer device 41 is located above one of the cavities 25, which is located in the U-shaped groove 482, and the pin 42 is facing the top opening 26 of the cavity 25.

[0113] In the second position, the rotating body 48 rotates to an inclined state away from the reaction unit 2, and its transfer device 41 is offset from the top of the cavity 25. The cavity 25 is located outside the U-shaped groove 482, and the reaction unit 2 can move in the vertical direction and be disassembled or assembled from the mounting base 6.

[0114] In other words, when the pipetting unit 4 is in the first position, the entire detection instrument 100 can be used normally. However, when the reaction unit 2 needs to be disassembled, the rotating body 48 needs to be moved to the second position, and then the reaction unit 2 needs to be removed and replaced with a new one. The rotation of the rotating body 48 drives the transfer device 41 to deviate from the reaction unit 2, making the operation simple.

[0115] The main body unit 1 also includes two side plates. The bottom ends of the two side plates are fixedly connected to the base plate 11 and are located on opposite sides of the rotating body 48. One side plate extends vertically and is located between the rotating body 48 and the first driving unit 5, below the reaction unit 2. This side plate is defined as the first side plate 12. The other side plate is an inclined plate that gradually deviates from the rotating body 48 from the bottom to the top. This side plate is defined as the second side plate 13.

[0116] The third drive unit includes two magnetic components that attract each other. These two magnetic components are defined as the first N magnetic block 491 and the first S magnetic block 492. The first N magnetic block 491 and the first S magnetic block 492 are respectively embedded in the rotating body 48 and the first side plate 12, and are arranged opposite to each other.

[0117] In the first position, the first N-magnet 491 and the first S-magnet 492 attract each other and are fully engaged, with the rotating body 48 abutting against the first side plate 12. This prevents the rotating body 48 from wobbling, making the pipetting unit 4 more stable in the first position. Furthermore, when the pipetting unit 4 is transferred from the second position to the first position, the attraction between the first N-magnet 491 and the first S-magnet 492 also serves a positioning function, preventing the pipetting unit 4 from deviating from the preset position. The probe 42 of the pipetting unit 4 needs to precisely match the top opening 26 of the cavity 25. Since the top opening 26 of the cavity 25 is relatively small, if the pipetting unit 4 deviates slightly from the preset position, the probe 42 may not be able to be inserted into the cavity 25. Therefore, the cooperation of the first N-magnet 491 and the first S-magnet 492 ensures that when the pipetting unit 4 rotates from the second position to the first position, the rotating body fully rotates to the preset position, ensuring precise positioning.

[0118] The fourth drive unit also includes two magnetic components that attract each other. These two magnetic components are defined as the second N magnetic block 493 and the second S magnetic block 494. The second N magnetic block 493 and the second S magnetic block 494 are respectively embedded in the opposing sides of the rotating body 48 and the second side plate 13, and are arranged opposite to each other.

[0119] When the pipetting unit 4 rotates from the first position to the second position, the second N magnetic block 493 and the second S magnetic block 494 attract each other, and the rotating body 48 and the second side plate 13 are in contact, which restricts the rotating body 48 from continuing to rotate and ensures that the rotating body 48 is in a stable state.

[0120] The third drive unit is used to drive the rotating body 48 from the second position to the first position, while the fourth drive unit is used to drive the rotating body 48 from the first position to the second position.

[0121] Furthermore, as a preferred embodiment, the bottom wall of the transfer device 41 is also equipped with a first roller 483, and the top wall of the rotating body 48 is also equipped with a second roller 484. Both the first roller 483 and the second roller 484 can be rolled and are located in the U-shaped groove 482. In the first position, the first roller 483 and the second roller 484 are spaced apart from the reaction unit 2. The first roller 483 is located above the reaction unit 2, and the second roller 484 is located below the reaction unit 2. The axis of the second roller 484, the axis of the first roller 483 and the axis of rotation of the rotating body 48 are parallel to each other.

[0122] When reaction unit 2 needs to be disassembled, pipetting unit 4 is in the first position and needs to be moved from the first position to the second position. When reaction unit 2 is moved upward, its top will touch the first roller 483. As reaction unit 2 moves upward, the first roller 483 rotates counterclockwise, thereby pushing the rotating body 48 towards the second position. In other words, reaction unit 2 and pipetting unit 4 will form an integrated linkage, and it is not necessary to manually drive pipetting unit 4 to rotate.

[0123] Because of the fourth driving unit, the rotating body 48 only needs to rotate a certain angle away from the reaction unit 2 to be quickly adsorbed onto the second side plate 13.

[0124] When reaction unit 2 needs to be installed, pipetting unit 4 is in the second position. During the process of installing reaction unit 2 from top to bottom onto mounting base 6, since pipetting unit 4 is offset from the top of reaction unit 2 in the second position, reaction unit 2 will not touch the first roller 483 during the installation process from top to bottom. However, after reaction unit 2 is installed, if reaction unit 2 is pressed down further, the bottom end of reaction unit 2 will push the second roller 484 to roll, thereby causing the rotating body 48 to rotate toward the first position.

[0125] Furthermore, thanks to the third drive unit, the rotating body 48 only needs to rotate a certain angle toward the reaction unit 2 to quickly and accurately adhere to the first side plate 12.

[0126] The analysis unit 3 is preferably mounted on the support column 481. When the pipetting unit 4 is in the first position, the analysis unit 3 is aligned with the window and side cover 27 of one of the chambers 25, and the analysis unit 3 can read and receive the reflectance spectral signal of the test strip 28. As the optical reaction unit rotates, the windows of the multiple chambers are aligned with the analysis unit one by one, and the optical reaction unit can read the reflectance spectral signal of the test strip in each chamber.

[0127] Of course, in a preferred embodiment, multiple test strips 28 can be mounted on the mounting plate. The multiple test strips 28 can be aligned with the analysis unit as the reaction unit rotates, and the analysis unit can read the emission spectrum signals of the multiple test strips.

[0128] When in use, the collection chamber receives a urine sample and delivers it into the chamber 25 via a pump, adapter 46, and pin 42. The sample reacts with the test strip 28. The data processing unit then sends a detection command to the analysis unit 3. The analysis unit 3 uses optical detection. Upon receiving the detection command, the light source of the analysis unit 3 emits a test light of a preset wavelength towards the chamber 25. The test light enters the chamber 25 through the side plate and is reflected on the test strip 28. The reflected light then illuminates the spectral sensor. The wavelength selection in the spectral sensor first selects the set wavelength light from the incident light and then converts the set wavelength light into an electrical signal. This electrical signal is the detection data. After generating the detection data, the spectral sensor sends the detection data to the data processing unit. The data processing unit then produces the liquid analysis results based on the detection data for the user to view.

[0129] In one alternative, after detection, the test strip 28 can spontaneously detect light, and the analysis unit 3 only needs to receive this light to complete the detection. For example, the ECL reagent works by luminescence through an oxidation reaction. Luminol, as the main component of the luminescent substrate, is oxidized under alkaline conditions by horseradish peroxidase (HRP) to generate an excited-state intermediate of 3-aminophthalic acid. When it returns to its ground state, it emits photons with a maximum emission wavelength of 425 nm. This photon signal can be captured by X-ray film or an imager.

[0130] In a single urine analysis, multiple tests need to be performed on the urine. At this time, multiple test reagents can also be installed in the multiple chambers 25 of the reaction unit 2. The multiple test reagents react with the sample in the chambers 25 respectively. The analysis unit 3 will perform multiple optical tests on the sample to obtain multiple test data. Thus, the data processing unit can generate urine analysis results based on these multiple test data for the user to view.

[0131] The optical detection module can perform optical detection on the mixture of urine and test reagent in cavity 25 based on the received detection command, and obtain detection data. That is, the microfluidic chip can perform at least one optical detection on the user's urine, so that the user's urine can be analyzed in daily life, so that the user can view the urine analysis data and understand his / her own health status.

[0132] In other embodiments, different analytical units can be selected according to the reaction type of the first substance and the second substance. The analytical units are used to analyze the reactants of the reaction between the first substance and the second substance. For example, analytical unit 3 can also use electrochemical or mass spectrometry detection.

[0133] In the detection instrument of the present invention, the reaction unit and the pipetting unit move relative to each other. It is only necessary to send the sample to the cavity of the reaction unit and react with the test paper or quantitative reagent. Since multiple cavities are provided, multiple tests can be performed without cleaning the equipment, and the detection accuracy can be guaranteed.

[0134] The present invention also relates to a control method for a detection instrument, the control method comprising the steps of:

[0135] S1. The first substance is positioned at the reaction site;

[0136] S2. Control the relative movement of the pipetting unit and the reaction unit, and position one of the reaction sites in the operating position;

[0137] S3. The second substance is transferred from the pipetting unit to the reaction site, where the first and second substances react to form reactants;

[0138] S4. Analyze the reactants at the reaction sites using the analysis unit, and send the analysis data to the data processing unit;

[0139] S5. The data processing unit processes the analysis data, and the final detection result is obtained by analyzing the analysis data.

[0140] If the first substance is a test strip and the second substance is a sample, the analysis unit can detect the reactants formed by the reaction between the sample and the test strip.

[0141] Furthermore, the detection instrument also includes the aforementioned main body unit, first drive unit, and mounting base, with the first drive unit connected to the main body unit. The mounting base is connected to the output shaft of the first drive unit. The reaction unit is detachably connected to the mounting base. The reaction unit is rotatably connected to the main body unit about a vertical axis; multiple reaction positions are arranged at circumferential intervals along the reaction unit.

[0142] In step S2, the first driving unit can drive the mounting base and the reaction unit to rotate around the vertical axis, and cause one of the reaction positions to rotate to a preset position, which is the position aligned with the analysis unit.

[0143] In the example of using a probe, in step S3, the pump drives the second substance in the collection chamber to the probe, the probe moves into the reaction site and transfers the second substance to the reaction site.

[0144] Furthermore, the transfer device is provided with a moving channel, with a first opening and a second opening at its two ends, respectively. The first opening is aligned with the reaction site. The reaction site is a cavity with a top opening. The transfer device is located above the reaction unit. The moving channel extends vertically, with the first opening at the bottom and the second opening at the top. A pin can be moved vertically within the moving channel, and the pin tip can be moved into or out of the reaction site from the top opening.

[0145] In step S3, after the pump drives the second substance in the collection chamber to the needle, the needle moves downward into the reaction position and transfers the second substance to the reaction position.

[0146] As a preferred embodiment, a second drive unit is also provided in the moving channel, and the second drive unit is connected to the pin.

[0147] In step S3, after the pump drives the second substance in the collection chamber to the insertion needle, the second driving unit drives the insertion needle downward into the reaction position and transfers the second substance to the reaction position.

[0148] Optionally, the pipetting unit further includes a second elastic element, which is installed within the movement channel;

[0149] In step S3, after the second driving unit drives the pin downward into the reaction position and transfers the second substance to the reaction position, the second elastic element drives the pin upward out of the reaction position.

[0150] Optionally, the reaction unit and the main unit are detachably connected. The pipetting unit and the main unit are rotatably connected about a horizontal axis. The pipetting unit can rotate between a first position and a second position. In the first position, the pipetting unit can deliver the second substance to the reaction site. In the second position, the reaction unit can be removed from or installed on the mounting base. The first position is the working state of the detection instrument, and the second position is mainly to facilitate the disassembly and installation of the reaction unit.

[0151] In steps S2-S5, the pipetting unit is in the first position;

[0152] After repeating steps S1-S5 for a preset period, the process also includes:

[0153] Step S6: Rotate the pipetting unit to the second position, so that the pipetting unit is off-center from the reaction unit, and remove the reaction unit from the mounting base.

[0154] Step S7: Replace with a new reaction unit, rotate the pipetting unit from the second position to the first position, and after returning to the working state, you can start the detection. Repeat steps S1-S5 again.

[0155] Optionally, the pipetting unit further includes a rotating body, the bottom end of which is rotatably connected to the main body unit, and the top end of which is provided with a support column. The bottom end of the transfer device is connected to the top end of the support column, and the bottom wall of the transfer device, the side wall of the support column, and the top wall of the rotating body form a U-shaped groove. In a first position, the reaction site is located inside the U-shaped groove. In a second position, the reaction site is located outside the U-shaped groove.

[0156] Step S6: Rotate the pipetting unit to the second position, rotate the reaction unit to the outside of the U-shaped groove, and remove the reaction unit from the bottom and top mounting base;

[0157] In step S7, after replacing the new reaction unit, rotate the pipetting unit to the first position, and the reaction unit is located in the U-shaped groove. Then you can start steps S1-S5.

[0158] Preferably, a first roller is also installed on the bottom wall of the transfer device; a second roller is also provided on the top wall of the rotating body. The radially outer side of the reaction unit is located within a U-shaped groove;

[0159] In step S6, during the process of the reaction unit moving from the first position to the second position, the first roller is pushed to roll, and the pipetting unit is rotated to the second position. The reaction unit is moved to the outside of the U-shaped groove, and the reaction unit is disassembled.

[0160] In step S7, the process of installing the new reaction unit into the mounting base will push the second roller to roll and drive the pipetting unit to rotate to the first position. At this time, the new reaction unit moves into the U-shaped groove, completing the installation of the new reaction unit.

[0161] Optionally, the pipetting unit further includes a third drive unit, which is connected to the main body unit and the rotating body, and is used to drive the rotating body from the second position to the first position;

[0162] In step S6, the reaction unit pushes the first roller to roll as it moves from the first position to the second position, and the third drive unit drives the reaction unit to rotate to the second position.

[0163] Optionally, the pipetting unit further includes a fourth drive unit, which is connected to the main body unit and the rotating body, and is used to drive the rotating body from the first position to the second position;

[0164] In step S7, the process of installing the new reaction unit into the mounting base will push the second roller to roll, causing the pipetting unit to rotate, and the fourth drive unit will drive the pipetting unit to rotate to the first position.

[0165] The fourth driving unit and the third driving unit are the magnetic blocks that attract each other as described above.

[0166] Optionally, the reaction unit includes a reagent tray and a sealing membrane, wherein the reagent tray has multiple reaction positions, the top openings of the multiple reaction positions are located on the top surface of the reagent tray, and the sealing membrane is sealed to the top surface of the reagent tray and seals the top openings of the reaction positions.

[0167] In step S3, after the pump drives the second substance in the collection chamber to the insertion needle, the insertion needle pierces the sealing membrane downward and moves into the reaction site from the top opening of the reaction site, and then the second substance is transferred to the reaction site.

[0168] Furthermore, the reaction position has a window that opens radially outward toward the reagent tray, and a side cover made of a light-transmitting material is installed at the window. The analytical unit is connected to the support column and can rotate with the rotating body.

[0169] In step S2, the first driving unit drives the mounting base and the reaction unit to rotate around the vertical axis, so that one of the reaction positions is aligned with the analysis unit;

[0170] Repeat steps S1-S5 for a preset period. The first drive unit drives the mounting base and reaction unit to rotate around the vertical axis, and multiple reaction positions are aligned with the analysis unit one by one.

[0171] The preferred embodiments of the present invention have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to utilize aspects, features, and concepts from various patents, applications, and publications to provide other embodiments.

[0172] In light of the detailed description above, these and other changes can be made to the embodiments. Generally, the terminology used in the claims should not be considered limited to the specific embodiments disclosed in the specification and claims, but should be understood to include all possible embodiments together with the full scope of equivalents enjoyed by these claims.

[0173] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A reaction unit, characterized in that, The reaction unit includes: A reagent tray having multiple cavities, each cavity having an opening at its top. A mounting plate is installed within each cavity, and a groove for a first substance is mounted on the outer side of the mounting plate. The top of the mounting plate is aligned with the top opening of the cavity and has a flow guiding structure communicating with the groove. A sealing membrane is provided, which is sealed to the top surface of the reagent tray and seals the top opening of the cavity.

2. The reaction unit according to claim 1, characterized in that, The reagent tray is cylindrical; The plurality of the cavities are evenly arranged around the circumference of the reagent disk.

3. The reaction unit according to claim 1, characterized in that, The cavity is provided with a window that opens radially outward toward the reagent tray; The reaction unit also includes a side cover made of a light-transmitting material, which covers the window.

4. The reaction unit according to claim 1, characterized in that, The width of the inner wall of the flow guiding structure gradually increases from top to bottom.

5. The reaction unit according to claim 1, characterized in that, The outer radial side of the reagent tray is a cylinder, and the inner side is a polygonal prism.

6. A testing instrument, characterized in that, The detection instrument includes: Main unit; The reaction unit of claim 1 is rotatably connected to the main unit about a vertical axis. A pipetting unit is connected to the main unit and is equipped with a needle that can operatively pierce the sealing membrane and move into or out of the cavity through the upper opening of the reaction unit cavity to deliver the second substance into multiple cavities.

7. The testing instrument according to claim 6, characterized in that, The testing instrument also includes a mounting base and a first drive unit; The mounting base is connected to the output shaft of the first drive unit; The reaction unit is detachably connected to the mounting base; The first driving unit is connected to the main body unit and can operably drive the reaction unit to rotate about a vertical axis.

8. The testing instrument according to claim 6, characterized in that, The pipetting unit includes a transfer device; The needle is movably connected to the transfer device in a vertical direction and has a head end and a tail end. The head end is provided with a needle tip and can pierce the sealing membrane and enter the cavity through the upper opening of the reaction unit cavity. The tail end is connected to the collection cavity where the second substance is placed.

9. The testing instrument according to claim 6, characterized in that, The cavity is provided with a window that opens radially outward toward the reagent tray; The reaction unit also includes a side cover made of a light-transmitting material, which covers the window; The detection instrument also includes an analysis unit; The windows of the plurality of cavities are operatively aligned with the analysis unit.

10. The detection instrument according to claim 9, characterized in that, The first substance includes multiple test strips; Multiple test strips are operatively aligned with the analysis unit.

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