Biochemical Analyzer

Abstract

The present invention relates to the technical field of medical automated detection equipment, and in particular to a biochemical analyzer. The biochemical analyzer comprises: a rotatable sample disc and a detection mechanism; the sample disc is provided with a plurality of clamping positions for clamping a reagent strip; the detection mechanism is used to detect the information of the reagent strip clamped on each clamping position on the sample disc when the clamping position is rotated to the position of the detection mechanism. The above-mentioned biochemical analyzer can improve the technical problem of low efficiency of dry biochemical detection existing in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of medical automated detection equipment, and in particular to a biochemical analyzer. Background Art

[0002] Since Technicon successfully produced the world's first fully automatic biochemical analyzer in 1957, fully automatic biochemical analyzers of various models and functions have continued to emerge, taking a very important step towards the automation of clinical biochemical testing in hospitals.

[0003] At present, clinical medical institutions generally use discrete biochemical analyzers, which consist of a sample tray, a reagent rack, a sample loading device, a reagent loading device, a reaction turntable, a colorimetric device, a mixing device, a clear system, an ISE system, and an operating system. In recent years, dry biochemical analyzers have developed rapidly due to their fast and convenient operation, such as Roche's ReflotronPlus dry biochemical analyzer and FUJIFILM's 4000ie fully automatic dry biochemical analyzer. These instruments use dry chemical methods. When used, only the sample needs to be added to the solid phase carrier dry reagent strip for subsequent determination, without the need for a traditional piping system. The dry reagent structure is generally divided into a diffusion layer, a filter layer, a reagent layer, a color development layer, and a support layer from top to bottom.

[0004] In clinical practice, a patient often needs to undergo several dry biochemical tests. At the same time, the number of patients who need to be tested is huge. The current practice is to place the samples one by one on the dry testing instrument for testing of each item. Not only is the manual operation cost high, the test reaction sensitivity is also not as expected, and it often takes more time and requires further testing, which seriously affects the patient's diagnosis. Summary of the invention

[0005] The purpose of the present invention is to provide a biochemical analyzer to alleviate the technical problem of low efficiency of dry biochemical detection in the prior art.

[0006] The present invention provides a biochemical analyzer, comprising: a rotatable sample disc and a detection mechanism;

[0007] The sample disc is provided with a plurality of clamping positions for clamping the reagent strips; the detection mechanism is used to detect the information of the reagent strip clamped on each clamping position on the sample disc when the clamping position rotates to the position where the detection mechanism is located.

[0008] Furthermore, the biochemical analyzer also includes a pair of optical couplers, one end of which is arranged above the sample disc, and the other end of which is arranged below the sample disc, and the pair of optical couplers is used to detect whether a reagent strip is stuck in the position.

[0009] Furthermore, the biochemical analyzer also includes a grid optical coupler and a step-out detection optical coupler;

[0010] The grid optical coupler and the step-out detection optical coupler are both arranged at the bottom end of the sample disc, and when the grid optical coupler detects a reagent strip on one of the card positions, the detection mechanism collects information of the reagent strip on the card position;

[0011] The out-of-step detection optical coupler is used to detect whether the sample disk is out of step.

[0012] Furthermore, the biochemical analyzer also includes a reset optical coupler, which is arranged on one side of the bottom end of the sample disk close to the out-of-step detection optical coupler, and is used to reset the sample disk.

[0013] Furthermore, the biochemical analyzer also includes a plurality of card input mechanisms;

[0014] The plurality of card-feeding mechanisms are arranged in a fan-shaped manner on one side of the sample disc, and the interval between two adjacent card-feeding mechanisms is the same as the interval between two adjacent card positions.

[0015] Furthermore, the card feeding mechanism includes a first driving part, a first guiding part, a first executing part and a first transmission part;

[0016] The first executing part is arranged on the first guiding part, the first driving part is connected with the first executing part through the first transmission part, and the first driving part drives the first executing part to reciprocate along the extending direction of the first guiding part to push the reagent strip into the clamping position.

[0017] Further, the first execution part includes a first slider, a first return spring and a first execution plate;

[0018] One end of the first sliding block is slidably arranged on the first guide portion, and the other end of the first sliding block is provided with a first extension plate, which is arranged at an end close to the center of the sample disc, and a first through hole and a first clamping groove are arranged on the first extension plate, and the first clamping groove is arranged on a side close to the center of the sample disc, and the first clamping groove is communicated with the first through hole, and first mounting holes are further arranged on both sides of the first extension plate, and the first mounting hole passes through the first through hole, and a bolt passes through the first mounting hole to mount the first return spring in the first through hole, and one end of the first return spring abuts against a side wall of the first through hole, and the other end of the first return spring is arranged above the first clamping groove;

[0019] The first actuator plate is connected to the first reset spring, one side of the first actuator plate extends toward an end away from the first slot and abuts against the first extension plate, the end of the first actuator plate away from the first reset spring is arranged in an arc shape, and the arc-shaped end of the first actuator plate is arranged on a side away from the center of the sample disk.

[0020] Further, the first guide portion is a slide rail, and a slide groove cooperating with the slide rail is provided at one end of the first slider close to the slide rail, and a clip plate for cooperating with the first transmission portion is provided on one side of the first slider, and the clip plate is fixed to the first slider by bolts, and the first transmission portion is arranged between the clip plate and the first slider.

[0021] Furthermore, the card ejection mechanism includes a second driving portion, a second guiding portion, a second executing portion and a second transmission portion;

[0022] The second driving part and the second guiding part are both arranged at the bottom end of the sample disc, the second executing part is arranged on the second guiding part, the second driving part and the second executing part are connected through the second transmission part, and the second driving part drives the second executing part to reciprocate along the extension direction of the second guiding part so that the reagent strip can be withdrawn from the clamping position.

[0023] Furthermore, the second execution part includes a second slider, a second return spring and a second execution plate;

[0024] One end of the second sliding block is slidably arranged on the second guide portion, and the other end of the second sliding block is provided with a second extension plate, and the second extension plate is arranged at an end close to the center of the sample disc, and a second through hole and a second clamping groove are arranged on the second extension plate, and the second clamping groove is arranged at a side of the second through hole away from the center of the sample disc, and the second clamping groove is communicated with the second through hole, and second mounting holes are further arranged on both sides of the second extension plate, and the second mounting hole passes through the second through hole, and a bolt passes through the second mounting hole to mount the second return spring in the second through hole, and one end of the second return spring abuts against the side wall of the second through hole, and the other end of the second return spring is arranged above the second clamping groove;

[0025] The second actuator plate is connected to the second reset spring, one side of the second actuator plate extends toward an end away from the second slot and abuts against the second extension plate, the end of the second actuator plate away from the second reset spring is arranged in an arc shape, and the arc-shaped end of the second actuator plate is arranged on a side close to the center of the sample disk.

[0026] Furthermore, the biochemical analyzer further comprises a positioning mechanism, which is arranged at one end of the first guide portion away from the sample disc, and is electrically connected to the first driving portion;

[0027] A positioning plate is disposed at one end of the first sliding block away from the center of the sample disc. When the positioning plate is used to cooperate with the positioning mechanism, the first driving unit stops working.

[0028] The present invention provides a biochemical analyzer, comprising a rotatable sample disc and a detection mechanism; the sample disc is provided with a plurality of clamping positions for clamping reagent strips; the detection mechanism is used to detect the information of the reagent strip clamped on each clamping position on the sample disc when the clamping position is rotated to the position of the detection mechanism. With the above scheme, a detection mechanism is provided above the sample disc, and the sample disc can rotate, so that the detection can continuously detect the reagent strip in the clamping position on the sample disc, thereby improving the detection efficiency. This is to alleviate the technical problem of low efficiency of dry biochemical detection existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a biochemical analyzer provided in an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the structure of a biochemical analyzer sample disk and a card feeding mechanism provided by an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the structure of a card feeding mechanism for a biochemical analyzer provided in an embodiment of the present invention;

[0033] Figure 4 This is a structural schematic diagram of the first execution part on the card feeding mechanism of a biochemical analyzer provided in an embodiment of the present invention.

[0034] Icons: 100-sample disc; 200-detection mechanism; 300-opposite photocoupler; 400-grid photocoupler; 500-out-of-step detection photocoupler; 600-reset photocoupler; 700-card feeding mechanism; 800-positioning mechanism; 110-card position; 710-first driving part; 720-first guide part; 730-first actuator; 740-first transmission part; 731-first slider; 732-first reset spring; 733-first actuator plate; 734-first extension plate; 735-positioning plate; 736-clamping plate; 7340-first card slot. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Figure 1 A schematic diagram of the structure of a biochemical analyzer provided in an embodiment of the present invention; Figure 2 The schematic diagram of the structure of the sample disk and card feeding mechanism of the biochemical analyzer provided by the embodiment of the present invention. Figure 1 and 2 As shown, a biochemical analyzer provided by the present invention comprises: a rotatable sample disk 100 and a detection mechanism 200;

[0039] The sample disc 100 is provided with a plurality of clamping positions 110 for clamping the reagent strips; the detection mechanism 200 is used to detect the information of the reagent strip clamped on each clamping position 110 when each clamping position 110 on the sample disc 100 rotates to the position of the detection mechanism 200.

[0040] Among them, the detection mechanism 200 is an optical path channel.

[0041] The number of the card positions 110 may be 12, 16 or more. In the present application, 16 card positions 110 are used, and the number may be adjusted according to specific usage.

[0042] In addition, the biochemical analyzer further comprises a workbench, on which the sample disc 100 and the detection mechanism 200 are both arranged.

[0043] The present invention provides a biochemical analyzer, in which a detection mechanism 200 is arranged above a sample disk 100, and the sample disk 100 can rotate, so that the detection can continuously detect the reagent strip in the clamping position 110 on the sample disk 100, thereby improving the detection efficiency, so as to alleviate the technical problem of low efficiency of dry biochemical detection in the prior art.

[0044] On the basis of the above embodiment, the biochemical analyzer further includes a counter-radiation optical coupler 300, one end of which is arranged above the sample disc 100, and the other end of which is arranged below the sample disc 100, and the counter-radiation optical coupler 300 is used to detect whether a reagent strip is stuck in the clamping position 110.

[0045] In this embodiment, the opposing optical coupler 300 is fixedly arranged. When the sample disk 100 rotates, the clamping position 110 passes through the opposing optical coupler 300, and the opposing optical coupler 300 can detect whether there is a reagent strip on the clamping position 110. Moreover, when installing a reagent strip in each clamping position 110, the sample disk 100 will rotate so that the clamping position 110 where the reagent strip is installed passes through the opposing optical coupler 300, thereby detecting whether the reagent strip is successfully installed.

[0046] On the basis of the above embodiment, the biochemical analyzer further includes a grid optical coupler 400 and a step-out detection optical coupler 500;

[0047] The grid optical coupler 400 and the step-out detection optical coupler 500 are both arranged at the bottom of the sample disc 100. When the grid optical coupler 400 detects a reagent strip on one of the clamping positions 110, the detection mechanism 200 collects information of the reagent strip on the clamping position 110.

[0048] The out-of-step detection optical coupler 500 is used to detect whether the sample disk 100 is out of step.

[0049] In this embodiment, the grid optical coupler 400 and the step-out detection optical coupler 500 are arranged on the same mounting seat, and the grid optical coupler 400 and the detection mechanism 200 work synchronously. When a reagent strip is on a position 110 detected by the grid optical coupler 400, the detection mechanism 200 detects a position 110, and the time when the multiple optical couplers sense and the time when the detection mechanism 200 detects the optical coupler are the same, thereby ensuring that the detection mechanism 200 can detect all the positions 110 on the sample disk 100 to improve the accuracy of the overall device. At the same time, the step-out detection optical coupler 500 can detect the step-out situation of the sample disk 100, so as to facilitate the subsequent adjustment of the driving mechanism for driving the sample disk 100.

[0050] On the basis of the above embodiment, the biochemical analyzer further includes a reset optical coupler 600 , which is arranged at the bottom end of the sample disk 100 close to the side of the out-of-step detection optical coupler 500 , and is used to reset the sample disk 100 .

[0051] In this embodiment, the reset optical coupler 600 can detect whether the sample disk 100 is accurately reset, so as to ensure the accuracy of the next operation of the sample disk 100 and the detection mechanism 200.

[0052] On the basis of the above embodiment, further, the biochemical analyzer further includes a plurality of card input mechanisms 700;

[0053] The plurality of card-feeding mechanisms 700 are arranged in a fan-shaped manner on one side of the sample disk 100 , and the interval between two adjacent card-feeding mechanisms 700 is the same as the interval between two adjacent card positions 110 .

[0054] Among them, there are four card input mechanisms 700.

[0055] In this embodiment, multiple card feeding mechanisms 700 are arranged in a fan shape so that the card feeding mechanisms 700 and the sample disc 100 are adapted to each other, and the spacing between two adjacent card feeding mechanisms 700 is the same as the spacing between two adjacent card positions 110. In this way, multiple card feeding mechanisms 700 can work simultaneously, thereby increasing the speed at which the reagent strip is installed into the card position 110.

[0056] Figure 3 The structure diagram of the card feeding mechanism of the biochemical analyzer provided in the embodiment of the present invention is shown in FIG. Figure 3 As shown, based on the above embodiment, the card feeding mechanism 700 further includes a first driving part 710, a first guiding part 720, a first executing part 730 and a first transmission part 740;

[0057] The first driving part 710 and the first guiding part 720 are both arranged at the bottom end of the sample disc 100, and the first executing part 730 is arranged on the first guiding part 720. The first driving part 710 and the first executing part 730 are connected through the first transmission part 740. The first driving part 710 drives the first executing part 730 to reciprocate along the extension direction of the first guiding part 720 to push the reagent strip into the clamping position 110.

[0058] Among them, the first transmission part 740 is a belt, the first driving part 710 includes a driving wheel and a driven wheel, the two ends of the driving wheel and the driven wheel are respectively arranged at the two ends of the first guide part 720, the belt is used to connect the driving wheel and the driven wheel, and the belt is also connected to the first executing part 730, driving the first executing part 730 to move along the first guide part 720.

[0059] In this embodiment, one end of the first guide portion 720 is close to the edge of the workbench, and the other end of the first guide portion 720 extends toward the intersection of the center of the sample disk 100 and the workbench. The first execution portion 730 can move relative to the first guide portion 720, so that the first execution portion 730 can push the reagent strip into the positioning position 110.

[0060] Figure 4 The schematic diagram of the structure of the first execution part of the card feeding mechanism of the biochemical analyzer provided in the embodiment of the present invention. Figure 4 As shown, based on the above embodiment, further, the first execution part 730 includes a first slider 731, a first return spring 732 and a first execution plate 733;

[0061] One end of the first sliding block 731 is slidably disposed on the first guide portion 720, and the other end of the first sliding block 731 is provided with a first extension plate 734, which is disposed at one end close to the center of the sample disk 100, and the first extension plate 734 is provided with a first through hole and a first clamping groove 7340, the first clamping groove 7340 is disposed at one side close to the center of the sample disk 100, the first clamping groove 7340 is communicated with the first through hole, and first mounting holes are further disposed on both sides of the first extension plate 734, the first mounting hole passes through the first through hole, and a bolt passes through the first mounting hole to mount the first return spring 732 in the first through hole, and one end of the first return spring 732 abuts against the side wall of the first through hole, and the other end of the first return spring 732 is disposed above the first clamping groove 7340;

[0062] The first actuator plate 733 is connected to the first reset spring 732, and one side of the first actuator plate 733 extends toward an end away from the first slot 7340 and abuts against the first extension plate 734. The end of the first actuator plate 733 away from the first reset spring 732 is arranged in an arc shape, and the arc-shaped end of the first actuator plate 733 is arranged on a side away from the center of the sample disk 100.

[0063] The first return spring 732 is a torsion spring.

[0064] In this embodiment, a first extension plate 734 is provided on the first slider 731, and a first through hole and a first mounting hole are provided on the first extension plate 734. The first actuator plate 733 is connected to the first return spring 732. The bolt passes through the first mounting hole and the first return spring 732, and the first return spring 732 is installed in the first through hole. One end of the first return spring 732 is arranged above the first slot 7340. In this way, there is a gap between the first return spring and the first slot 7340, and the other end is arranged on the inner wall close to the first through hole. One end of the first actuator plate 733 is arranged on the side away from the center of the sample disc 100, and one side of the first actuator plate 733 extends toward the end away from the first card slot 7340 and abuts against the first extension plate 734. When the first actuator plate 733 moves toward one end of the sample disc 100, the first actuator plate 733 will push the reagent strip from the outside to the card position 110. When the first actuator plate 733 is withdrawn, the first actuator plate 733 will be subjected to the force and will rotate toward one end of the card wiper, so that the first actuator plate 733 can be withdrawn smoothly, and reset by the first reset spring 732 after withdrawal.

[0065] On the basis of the above embodiment, further, the first guide portion 720 is a slide rail, and the first slider is provided with a slide groove cooperating with the slide rail at one end close to the slide rail, and a clip plate 736 for cooperating with the first transmission portion 740 is provided on one side of the first slider 731, and the clip plate 736 is fixed to the first slider 731 by bolts, and the first transmission portion 740 is arranged between the clip plate 736 and the first slider 731.

[0066] In this embodiment, the first guide portion 720 is a slide rail, and a slide groove is provided at the bottom end of the first slider 731 so that the first slider 731 can slide on the first guide portion 720, and a clamping plate 736 is also provided on one side of the first slider 731. The clamping plate 736 fixes the belt and the first slider 731 through bolts, so that the belt drives the first slider 731 to move.

[0067] On the basis of the above embodiment, further, the card ejection mechanism includes a second driving part, a second guiding part, a second executing part and a second transmission part;

[0068] The second driving part and the second guiding part are both arranged at the bottom end of the sample disc, the second executing part is arranged on the second guiding part, the second driving part and the second executing part are connected through the second transmission part, and the second driving part drives the second executing part to reciprocate along the extension direction of the second guiding part so that the reagent strip can be withdrawn from the clamping position.

[0069] The structures of the second transmission part and the second driving part are the same as those of the first transmission part and the first driving part.

[0070] In this embodiment, one end of the second guide portion is close to the edge of the workbench, and the other end of the second guide portion extends toward the intersection of the center of the sample disk and the workbench. The second execution portion can move relative to the second guide portion, so that the second execution portion can withdraw the reagent strip from the locking position 110.

[0071] On the basis of the above embodiment, further, the second execution part includes a second slider, a second return spring and a second execution plate;

[0072] One end of the second sliding block is slidably arranged on the second guide portion, and the other end of the second sliding block is provided with a second extension plate, and the second extension plate is arranged at an end close to the center of the sample disc, and a second through hole and a second clamping groove are arranged on the second extension plate, and the second clamping groove is arranged at a side of the second through hole away from the center of the sample disc, and the second clamping groove is communicated with the second through hole, and second mounting holes are further arranged on both sides of the second extension plate, and the second mounting hole passes through the second through hole, and a bolt passes through the second mounting hole to mount the second return spring in the second through hole, and one end of the second return spring abuts against the side wall of the second through hole, and the other end of the second return spring is arranged above the second clamping groove;

[0073] The second actuator plate is connected to the second reset spring, one side of the second actuator plate extends toward an end away from the second slot and abuts against the second extension plate, the end of the second actuator plate away from the second reset spring is arranged in an arc shape, and the arc-shaped end of the second actuator plate is arranged on a side close to the center of the sample disk 100.

[0074] In this embodiment, a second extension plate is provided on the second sliding block, and a second through hole and a second mounting hole are provided on the second extension plate. The second actuator plate is connected to the second return spring, and a bolt passes through the second mounting hole and the second return spring to install the second return spring in the second through hole. One end of the second return spring is provided above the second slot, so that there is a gap between the second return spring and the second slot, and the other end is provided on the inner wall close to the second through hole. Since one end of the second actuator plate is arranged on the side close to the center of the sample disk 100 in an arc shape, one side of the second actuator plate extends away from the end of the second slot and abuts against the second extension plate. When the second actuator plate moves away from the end of the sample disk 100, the second actuator plate will cause the reagent strip to withdraw from the locking position 110. When the second actuator plate enters the locking position 110, the second actuator plate is rotated by the force so that the second actuator plate can enter smoothly, and is reset by the second return spring after entering.

[0075] On the basis of the above embodiment, further, a positioning mechanism 800 is provided at one end of the edge of the workbench close to the first guide part 720 and away from the sample disk 100, and the positioning mechanism 800 is electrically connected to the first driving part 710;

[0076] A positioning plate 735 is disposed at one end of the first sliding block 731 away from the center of the sample disk 100 . When the positioning plate 735 is used to cooperate with the positioning mechanism 800 , the first driving unit 710 stops working.

[0077] Furthermore, the positioning plate 735 is arranged in an L shape, the positioning mechanism 800 is a positioning optical coupler, and the positioning optical coupler is arranged in a U shape.

[0078] In this embodiment, a positioning mechanism 800 is also provided on the workbench. The positioning mechanism 800 is a U-shaped positioning optical coupler. A positioning plate 735 is provided on the first slider 731. The positioning plate 735 is L-shaped. When the positioning plate 735 cooperates with the positioning optical coupler, the first slider 731 moves to a predetermined position. At this time, the first driving unit 710 stops working to ensure that the position of the first slider 731 is relatively stable.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A biochemical analyzer, characterized in that: include: Rotatable sample disc and detection mechanism; The sample disc is provided with a plurality of clamping positions for clamping the reagent strip; the detection mechanism is used to detect the information of the reagent strip clamped on each clamping position on the sample disc when the clamping position rotates to the position where the detection mechanism is located; The biochemical analyzer also includes a plurality of card input mechanisms and a card return mechanism; A plurality of the card feeding mechanisms and one card withdrawing mechanism are arranged in a fan-shaped manner on one side of the sample disc, and the interval between two adjacent card feeding mechanisms is the same as the interval between two adjacent card positions; The card feeding mechanism of the biochemical analyzer comprises a first driving part, a first guiding part, a first executing part and a first transmission part; The first driving part and the first guiding part are both arranged at the bottom end of the sample disc, the first executing part is arranged on the first guiding part, the first driving part and the first executing part are connected through the first transmission part, and the first driving part drives the first executing part to reciprocate along the extending direction of the first guiding part to push the reagent strip into the clamping position; The first execution part includes a first slider, a first return spring and a first execution plate; One end of the first sliding block is slidably arranged on the first guide portion, and the other end of the first sliding block is provided with a first extension plate, which is arranged at an end close to the center of the sample disc, and a first through hole and a first clamping groove are arranged on the first extension plate, and the first clamping groove is arranged on a side close to the center of the sample disc, and the first clamping groove is communicated with the first through hole, and first mounting holes are further arranged on both sides of the first extension plate, and the first mounting hole passes through the first through hole, and a bolt passes through the first mounting hole to mount the first return spring in the first through hole, and one end of the first return spring abuts against a side wall of the first through hole, and the other end of the first return spring is arranged above the first clamping groove; The first actuator plate is connected to the first reset spring, one side of the first actuator plate extends to an end away from the first slot and abuts against the first extension plate, the end of the first actuator plate away from the first reset spring is arranged in an arc shape, and the arc-shaped end of the first actuator plate is arranged on a side away from the center of the sample disc; The biochemical analyzer further comprises a positioning mechanism, which is arranged at one end of the first guide portion away from the sample disk, and is electrically connected to the first driving portion; A positioning plate is disposed at one end of the first sliding block away from the center of the sample disc. When the positioning plate is used to cooperate with the positioning mechanism, the first driving part stops working.

2. The biochemical analyzer according to claim 1, characterized in that: The biochemical analyzer also includes a counter-radiation optical coupler, a grid optical coupler and a step-out detection optical coupler; One end of the opposing optical coupler is arranged above the sample disc, and the other end of the opposing optical coupler is arranged below the sample disc, and the opposing optical coupler is used to detect whether a reagent strip is stuck in the clamping position; The grid optical coupler and the step-out detection optical coupler are both arranged at the bottom end of the sample disc, and when the grid optical coupler detects a reagent strip on one of the card positions, the detection mechanism collects information of the reagent strip on the card position; The out-of-step detection optical coupler is used to detect whether the sample disk is out of step.

3. The biochemical analyzer according to claim 2, characterized in that: The biochemical analyzer also includes a reset optical coupler, which is arranged on one side of the bottom end of the sample disk close to the out-of-step detection optical coupler, and is used to reset the sample disk.

4. The biochemical analyzer according to claim 1, characterized in that: The first guide part is a slide rail, and the first slider is provided with a slide groove cooperating with the slide rail at one end close to the slide rail, and a clamping plate for cooperating with the first transmission part is provided on one side of the first slider, and the clamping plate is fixed to the first slider by bolts, and the first transmission part is arranged between the clamping plate and the first slider.

5. The biochemical analyzer according to claim 4, characterized in that: The card ejection mechanism comprises a second driving part, a second guiding part, a second executing part and a second transmission part; The second driving part and the second guiding part are both arranged at the bottom end of the sample disc, the second executing part is arranged on the second guiding part, the second driving part and the second executing part are connected through the second transmission part, and the second driving part drives the second executing part to reciprocate along the extension direction of the second guiding part so that the reagent strip can be withdrawn from the clamping position.

6. The biochemical analyzer according to claim 5, characterized in that: The second execution part includes a second slider, a second return spring and a second execution plate; One end of the second sliding block is slidably arranged on the second guide portion, and the other end of the second sliding block is provided with a second extension plate, and the second extension plate is arranged at an end close to the center of the sample disc, and a second through hole and a second clamping groove are arranged on the second extension plate, and the second clamping groove is arranged at a side of the second through hole away from the center of the sample disc, and the second clamping groove is communicated with the second through hole, and second mounting holes are further arranged on both sides of the second extension plate, and the second mounting hole passes through the second through hole, and a bolt passes through the second mounting hole to mount the second return spring in the second through hole, and one end of the second return spring abuts against the side wall of the second through hole, and the other end of the second return spring is arranged above the second clamping groove; The second actuator plate is connected to the second reset spring, one side of the second actuator plate extends toward an end away from the second slot and abuts against the second extension plate, the end of the second actuator plate away from the second reset spring is arranged in an arc shape, and the arc-shaped end of the second actuator plate is arranged on a side close to the center of the sample disk.

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