Fluorescent PCR (Polymerase Chain Reaction) instrument capable of continuously adding samples

Abstract

The fluorescent PCR instrument comprises a base, the upper end face of the base is fixedly connected with a shell, a sample box and a luminoscope body which are distributed left and right are arranged in the shell, the upper end face of the shell is fixedly connected with fixing blocks which are distributed front and back, and the opposite side walls of the two fixing blocks are rotationally connected with rotating shafts. Wherein one end of one rotating shaft penetrates through the fixing block, extends to the outside of the fixing block and is fixedly connected with a gear, the other ends of the two rotating shafts are fixedly connected with supporting rods, the rack moves rightwards and drives the gear to rotate anticlockwise, and the two supporting rods incline leftwards through anticlockwise rotation of the gear. The two eccentric shafts are located on the two sides of the gear and the center shaft of the rotating wheel, so that the eccentric shaft on one side wall of the gear drives the eccentric shaft on one side wall of the rotating wheel to rotate clockwise through the connecting rod, and the rotating wheel is driven to rotate clockwise.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluorescent PCR instrument technical field, specifically is a kind of sustainable sample adding fluorescent PCR instrument. BACKGROUND

[0002] Fluorescence instrument is also called fluorescence spectrophotometer, which is a qualitative and quantitative analysis instrument. Through the detection of fluorescence spectrometer, the excitation spectrum, emission spectrum, quantum yield, fluorescence intensity, fluorescence lifetime, Stokes shift, fluorescence polarization and depolarization characteristics, and fluorescence quenching information of the substance can be obtained. The fluorescence instrument has good reproducibility, fast measurement speed and high sensitivity.

[0003] The existing fluorescent PCR instrument basically consists of a control system, a power supply system, a photoelectric system, a module component, a hot cover component, a shell component and software (V1.0). When using the existing fluorescent PCR instrument, the switch of the fluorescent PCR instrument is turned on, the prepared sample tube is placed into the sample inlet, the program is set, the experiment is run, the results are analyzed after the experiment, the sample tube after the experiment is taken out, and finally the fluorescent PCR instrument is turned off.

[0004] The existing fluorescent PCR instrument needs to be manually added intermittently, and cannot automatically add samples intermittently. When manually adding samples, the work needs to be stopped, which reduces the work efficiency. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of sustainable sample adding fluorescent PCR instrument, with the characteristics of automatic intermittent continuous sample adding and improving work efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of sustainable sample adding fluorescent PCR instrument, including base, the upper end surface of the base is fixedly connected with shell, the inside of the shell is provided with left and right distribution sample box and fluorescence instrument main body, the upper end surface of the fluorescence instrument main body is provided with sample inlet, the upper end surface of the shell is fixedly connected with front and rear distribution fixed block, the opposite side wall of two fixed blocks is rotatably connected with shaft, one end of one of the shafts penetrates fixed block and extends to the outside of fixed block, and is fixedly connected with gear, the other end of two shafts is fixedly connected with support rod, the horizontal rod is rotatably connected between two support rods, one end of the horizontal rod penetrates the front support rod and extends to the outside of the support rod, one end of the horizontal rod is fixedly connected with rotating wheel, the side wall of gear and rotating wheel is fixedly connected with eccentric shaft located on one side of gear center axis and the other side of rotating wheel center axis, and the eccentric shaft is movably connected with connecting rod between two eccentric shafts;

[0007] The outer wall of the cross bar is fixedly connected with an electric telescopic rod in the middle, and a clamp is arranged at one end of the electric telescopic rod.

[0008] The upper end face of the shell is slidably connected with a gear rack matched with the gear at the front end, one side wall of the gear rack is fixedly connected with a first connecting block in L shape, the front side upper end of the shell is fixedly connected with two baffle plates distributed left and right, a lead screw is rotatably connected between the two baffle plates, and the lead screw penetrates through and is threadedly connected with the first connecting block.

[0009] In order to continuously supply samples to the clamp, preferably, a first motor is installed on the inner side wall of the sample box, an output end of the first motor is fixedly connected with a turntable, the other side wall of the turntable is rotatably connected with a plurality of uniformly distributed sample trays, and a conical test tube groove is formed in the upper end face of each of the plurality of sample trays.

[0010] In order to realize the opening and clamping of the two grippers, preferably, the clamp comprises a second connecting block fixedly connected to one end of the electric telescopic rod, two connecting rods are fixedly connected to the lower end face of the second connecting block, grippers are rotatably connected to the other ends of the two connecting rods, a plurality of uniformly distributed engagement grooves are formed in the connection portions of the two grippers, and a double-sided gear rack is engagedly connected between the two engagement grooves.

[0011] In order to provide power for the movement of the gear rack, preferably, a second motor is installed on the other side wall of the baffle plate on the left side, and an output end of the second motor penetrates through the baffle plate and is fixedly connected with the lead screw.

[0012] In order to provide power for the movement of the double-sided gear rack, preferably, a first air cylinder is installed in the second connecting block, an output end of the first air cylinder penetrates through the second connecting block and extends below the second connecting block, and the output end of the first air cylinder is fixedly connected with the double-sided gear rack.

[0013] In order to prevent the sample tray from overturning and tilting, preferably, a counterweight is fixedly connected to the lower end face of each of the plurality of sample trays at the central position of the sample tray.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The sample test tube is first placed in the test tube groove of the upper end surface of the plurality of sample trays, and then the sample test tube in the sample tray on the uppermost side is clamped by the clamp, the second motor is started, the second motor drives the screw rod to rotate, the screw rod drives the first connecting block to move right through the threaded connection, the first connecting block drives the rack to move right, the rack drives the gear to rotate counterclockwise, the two supporting rods are tilted left through the counterclockwise rotation of the gear, when the gear rotates counterclockwise, the eccentric shaft fixedly connected with the gear also rotates counterclockwise, since the two eccentric shafts are located on the two sides of the gear and the central shaft of the rotating wheel, the eccentric shaft on the side wall of the gear drives the eccentric shaft on the side wall of the rotating wheel to rotate clockwise through the connecting rod, so that the rotating wheel rotates clockwise, and simultaneously, the rotating wheel drives the horizontal rod to rotate clockwise, when the two supporting rods are tilted left by 90 degrees, the horizontal rod drives the electric telescopic rod and the clamp to rotate clockwise by 90 degrees, since the electric telescopic rod and the clamp have the downward gravity, the horizontal rod rotates clockwise through the downward gravity of the electric telescopic rod and the clamp when the supporting rods are tilted left, the two eccentric shafts and the connecting rod prevent the electric telescopic rod and the clamp from shaking randomly, the electric telescopic rod is started, the electric telescopic rod drives the clamp to move downward, the first air cylinder is started, the first air cylinder drives the double-sided rack to move up and down, the double-sided rack drives the two grippers to rotate in opposite directions through the two meshing grooves, so that the two grippers are opened and clamped, and the sample is clamped, then the electric telescopic rod drives the clamp to move upward, the second motor is started again, the second motor drives the screw rod to rotate, the screw rod drives the first connecting block to move left through the threaded connection, the first connecting block drives the rack to move left, the rack drives the gear to rotate clockwise, the two supporting rods are reset through the clockwise rotation of the gear, since the gear starts to rotate clockwise, the rotating wheel starts to rotate counterclockwise through the driving of the eccentric shaft and the connecting rod, the rotating wheel drives the horizontal rod to rotate counterclockwise, so as to drive the electric telescopic rod and the clamp to rotate counterclockwise, after the two supporting rods are reset, the rack continues to move left, until the two supporting rods are tilted right by 90 degrees, and simultaneously, the horizontal rod drives the electric telescopic rod and the clamp to rotate counterclockwise by 180 degrees, the electric telescopic rod is started again, the electric telescopic rod drives the clamp to move downward, and the sample is placed into the main body of the fluorescence PCR instrument from the sample placing port, so that the automatic intermittent continuous sampling of the fluorescence PCR instrument is realized.

[0016] When the sample test tube in the sample tray on the uppermost side is clamped by the clamp, the first motor is started, the first motor drives the rotating disc to rotate, the rotating disc drives the plurality of sample trays to rotate, the rotating disc rotates the sample tray without sample to the lowermost side, and rotates the sample tray with sample to the highest side, and then the sample test tube is clamped by the clamp, so that the clamp is continuously supplied with the sample. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view structure schematic diagram of the utility model;

[0018] Figure 2 It is the left view structure schematic view of the utility model;

[0019] Figure 3 It is the clamp amplification structure schematic view of the utility model;

[0020] Figure 4 It is the utility model Figure 1 The a part amplification schematic view in the utility model;

[0021] Figure 5 It is the utility model Figure 2 The b part amplification schematic view in the utility model;

[0022] In the drawing: 1, base; 2, shell; 3, sample box; 4, fluorescence instrument main body; 5, sample inlet; 6, fixed block; 7, rotating shaft; 8, gear; 9, support rod; 10, cross bar; 11, rotating wheel; 12, electric telescopic rod; 13, clamp; 14, connecting rod; 15, rack; 16, first connecting block; 17, baffle; 18, screw rod; 19, first motor; 20, rotating disc; 21, sample tray; 22, counterweight; 23, test tube groove; 24, second connecting block; 25, connecting rod; 26, gripper; 27, meshing groove; 28, double-sided rack; 29, second motor; 30, first cylinder; 31, eccentric shaft. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantage of the utility model more clearly and clearly, the following is combined with the drawing and example, and the utility model is further described in detail. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, in the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0024] Please refer to Figures 1 to 5A sustainable sample adding fluorescence PCR instrument, including base 1, the upper end surface of base 1 is fixedly connected with shell 2, sample box 3 and fluorescence instrument main body 4 are arranged inside shell 2 and are distributed left and right, the upper end surface of fluorescence instrument main body 4 is provided with sample placing port 5, the upper end surface of shell 2 is fixedly connected with fixed block 6 and is distributed front and back, the opposite side wall of two fixed blocks 6 is rotatably connected with shaft 7, one end of one shaft 7 penetrates fixed block 6 and extends to the outside of fixed block 6, and is fixedly connected with gear 8, the other end of two shafts 7 is fixedly connected with support rod 9, and rotary connection is formed between two support rods 9 and cross rod 10, one end of cross rod 10 penetrates front support rod 9 and extends to the outside of support rod 9, one end of cross rod 10 is fixedly connected with rotating wheel 11, the side wall of gear 8 and rotating wheel 11 is fixedly connected with eccentric shaft 31 located on the one side of the central axis of gear 8 and the other side of the central axis of rotating wheel 11, and the movable connection is formed between two eccentric shafts 31 and connecting rod 14;

[0025] The outer wall of cross rod 10 is fixedly connected with electric telescopic rod 12 in the middle, and the one end of electric telescopic rod 12 is provided with clamp 13;

[0026] The upper end surface of shell 2 is slidably connected with rack 15 matched with gear 8 in front, the side wall of rack 15 is fixedly connected with first connecting block 16 in L shape, the front upper end of shell 2 is fixedly connected with two baffle plates 17 distributed left and right, and the rotary connection is formed between two baffle plates 17 and screw rod 18, screw rod 18 penetrates first connecting block 16 and is screw-connected with first connecting block 16.

[0027] In the embodiment, the rack 15 moves to the right, the rack 15 drives the gear 8 to rotate counterclockwise, the two supporting rods 9 are tilted to the left through the counterclockwise rotation of the gear 8, when the gear 8 rotates counterclockwise, the gear 8 drives the eccentric shaft 31 fixedly connected with the gear 8 to rotate counterclockwise, since the two eccentric shafts 31 are located on the two sides of the central shaft of the gear 8 and the rotating wheel 11, the eccentric shaft 31 on the one side wall of the gear 8 drives the eccentric shaft 31 on the one side wall of the rotating wheel 11 to rotate clockwise through the connecting rod 14, thereby driving the rotating wheel 11 to rotate clockwise, meanwhile, the rotating wheel 11 drives the horizontal rod 10 to rotate clockwise, when the two supporting rods 9 are tilted to the left by 90 degrees, the horizontal rod 10 drives the electric telescopic rod 12 and the clamp 13 to rotate clockwise by 90 degrees, since the electric telescopic rod 12 and the clamp 13 have the downward gravity, when the supporting rods 9 are tilted to the left, the horizontal rod 10 rotates clockwise through the downward gravity of the electric telescopic rod 12 and the clamp 13, the two eccentric shafts 31 and the connecting rod 14 prevent the electric telescopic rod 12 and the clamp 13 from shaking randomly, the electric telescopic rod 12 is started, the electric telescopic rod 12 drives the clamp 13 to move downwards to clamp the sample, then the electric telescopic rod 12 drives the clamp 13 to move upwards, then the rack 15 moves to the left, the rack 15 drives the gear 8 to rotate clockwise, the two supporting rods 9 are reset through the clockwise rotation of the gear 8, since the gear 8 starts to rotate clockwise, the rotating wheel 11 starts to rotate counterclockwise through the driving of the eccentric shaft 31 and the connecting rod 14, the rotating wheel 11 drives the horizontal rod 10 to rotate counterclockwise, thereby driving the electric telescopic rod 12 and the clamp 13 to rotate counterclockwise, when the two supporting rods 9 are reset, the rack 15 continues to move to the left until the two supporting rods 9 are tilted to the right by 90 degrees, meanwhile, the horizontal rod 10 drives the electric telescopic rod 12 and the clamp 13 to rotate counterclockwise by 180 degrees, the electric telescopic rod 12 is started again, the electric telescopic rod 12 drives the clamp 13 to move downwards to place the sample into the fluorescence instrument main body 4 from the sample placing port 5, thereby realizing automatic intermittent continuous sampling of the fluorescence PCR instrument.

[0028] As a technical optimization scheme of the utility model, the inner side wall of the sample box 3 is provided with a first motor 19, the output end of the first motor 19 is fixedly connected with a rotating disc 20, the other side wall of the rotating disc 20 is rotatably connected with a plurality of uniformly distributed sample trays 21, a plurality of sample trays 21 are provided with a conical test tube groove 23 on the upper end face.

[0029] In the embodiment, the sample test tube is placed in the test tube groove 23 of the upper end surface of the sample tray 21, and then the sample test tube in the sample tray 21 is clamped by the clamp 13; after the sample test tube in the sample tray 21 is clamped by the clamp 13, the first motor 19 is started, the first motor 19 drives the rotating disc 20 to rotate, the rotating disc 20 drives the plurality of sample trays 21 to rotate, the rotating disc 20 rotates the sample tray 21 without the sample test tube to the lower position, and the sample tray 21 with the sample test tube is rotated to the highest position, and then the sample test tube is clamped by the clamp 13, so that the clamp 13 is continuously supplied with the sample.

[0030] As a technical optimization scheme of the utility model, the clamp 13 includes the second connecting block 24 fixedly connected with one end of the electric telescopic rod 12, the two connecting rods 25 fixedly connected with the lower end surface of the second connecting block 24, the two grippers 26 rotatably connected with the other end of the two connecting rods 25, and the plurality of evenly distributed meshing grooves 27 formed in the connecting position of the two grippers 26, and the double-sided rack 28 meshingly connected between the two meshing grooves 27.

[0031] In the embodiment, the double-sided rack 28 moves, the double-sided rack 28 drives the two grippers 26 to rotate in opposite directions through the two meshing grooves 27, so that the two grippers 26 are opened and clamped.

[0032] As a technical optimization scheme of the utility model, the second motor 29 is installed on the other side wall of the left baffle 17, and the output end of the second motor 29 penetrates the baffle 17 and is fixedly connected with the lead screw 18.

[0033] In the embodiment, the second motor 29 is started, the second motor 29 drives the lead screw 18 to rotate, the lead screw 18 drives the first connecting block 16 to move left and right through the threaded connection, the first connecting block 16 drives the rack 15 to move left and right, and the second motor 29 provides power for the movement of the rack 15.

[0034] As a technical optimization scheme of the utility model, the first air cylinder 30 is installed in the second connecting block 24, the output end of the first air cylinder 30 penetrates the second connecting block 24 and extends below the second connecting block 24, and the output end of the first air cylinder 30 is fixedly connected with the double-sided rack 28.

[0035] In the embodiment, the first air cylinder 30 is started, the first air cylinder 30 drives the double-sided rack 28 to move up and down, and the first air cylinder 30 provides power for the movement of the double-sided rack 28.

[0036] As a technical optimization scheme of the utility model, the lower end surface of the plurality of sample trays 21 is fixedly connected with the counterweight 22 located at the center position of the sample tray 21.

[0037] In this embodiment, the counterweight 22 fixedly connected to the lower end surface of the sample tray 21 can keep the sample tray 21 always with the front face upward, preventing the sample tray 21 from overturning or tilting.

[0038] Working principle: first, the prepared sample test tube is respectively put into the multiple sample trays 21 on the upper end face of the multiple test tube grooves 23, then the clamp 13 is used to clamp the sample test tube in the uppermost sample tray 21, the second motor 29 is started, the second motor 29 drives the lead screw 18 to rotate, the lead screw 18 drives the first connecting block 16 to move right through the threaded connection, the first connecting block 16 drives the rack 15 to move right, the rack 15 drives the gear 8 to rotate counterclockwise, the two supporting rods 9 are tilted left through the counterclockwise rotation of the gear 8, when the gear 8 rotates counterclockwise, the eccentric shaft 31 fixedly connected with the gear 8 also rotates counterclockwise, since the two eccentric shafts 31 are located on both sides of the central shaft of the gear 8 and the rotating wheel 11, the eccentric shaft 31 on one side wall of the gear 8 drives the eccentric shaft 31 on one side wall of the rotating wheel 11 to rotate clockwise through the connecting rod 14, so as to drive the rotating wheel 11 to rotate clockwise, at the same time, the rotating wheel 11 drives the cross rod 10 to rotate clockwise, when the two supporting rods 9 are tilted left by 90 degrees, the cross rod 10 drives the electric telescopic rod 12 and the clamp 13 to rotate clockwise by 90 degrees, since the electric telescopic rod 12 and the clamp 13 have the downward gravity, when the supporting rods 9 are tilted left, the cross rod 10 realizes clockwise rotation through the downward gravity of the electric telescopic rod 12 and the clamp 13, the two eccentric shafts 31 and the connecting rod 14 prevent the electric telescopic rod 12 and the clamp 13 from shaking randomly, the electric telescopic rod 12 is started, the electric telescopic rod 12 drives the clamp 13 to move downward, the first air cylinder 30 is started, the first air cylinder 30 drives the double-sided rack 28 to move up and down, the double-sided rack 28 drives the two grippers 26 to rotate in opposite directions through the two meshing grooves 27, so as to realize the opening and clamping of the two grippers 26, the sample is clamped, then the electric telescopic rod 12 drives the clamp 13 to move upward, the second motor 29 is started again, the second motor 29 drives the lead screw 18 to rotate, the lead screw 18 drives the first connecting block 16 to move left through the threaded connection, the first connecting block 16 drives the rack 15 to move left, the rack 15 drives the gear 8 to rotate clockwise, the two supporting rods 9 start to reset through the clockwise rotation of the gear 8, since the gear 8 starts to rotate clockwise, the rotating wheel 11 starts to rotate counterclockwise through the driving of the eccentric shaft 31 and the connecting rod 14, the rotating wheel 11 drives the cross rod 10 to rotate counterclockwise, so as to drive the electric telescopic rod 12 and the clamp 13 to rotate counterclockwise, when the two supporting rods 9 are reset, the rack 15 continues to move left until the two supporting rods 9 are tilted right by 90 degrees, at the same time, the cross rod 10 drives the electric telescopic rod 12 and the clamp 13 to rotate counterclockwise by 180 degrees, the electric telescopic rod 12 is started again, the electric telescopic rod 12 drives the clamp 13 to move downward, the sample is put into the fluorescence instrument main body 4 from the sample inlet 5, so as to realize the automatic intermittent continuous sampling of the fluorescence PCR instrument;

[0039] When the sample test tube inside the sample tray 21 on which the sample test tube is mounted is clamped away by the clamp 13, the first motor 19 is started, the first motor 19 drives the rotating disc 20 to rotate, the rotating disc 20 drives the plurality of sample trays 21 to rotate, the rotating disc 20 rotates the empty sample tray 21 downward, rotates the sample tray 21 on which the sample test tube is mounted to the highest position, and then continues to wait for the clamp 13 to clamp the sample test tube, so as to realize continuous supply of the sample to the clamp 13.

[0040] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A continuous sample loading fluorescence PCR instrument, comprising a base (1), wherein a shell (2) is fixedly connected to the upper end face of the base (1), and a sample box (3) and a fluorescence instrument body (4) are disposed inside the shell (2) and arranged on the left and right sides, wherein a sample inlet (5) is provided on the upper end face of the fluorescence instrument body (4), characterized in that: The upper end surface of the shell (2) is fixedly connected with front and rear distributed fixed blocks (6), the opposite side walls of the two fixed blocks (6) are rotatably connected with rotating shafts (7), one end of one of the rotating shafts (7) penetrates through the fixed block (6) and extends to the outside of the fixed block (6), and is fixedly connected with a gear (8), the other ends of the two rotating shafts (7) are fixedly connected with support rods (9), a cross rod (10) is rotatably connected between the two support rods (9), one end of the cross rod (10) penetrates through the front support rod (9) and extends to the outside of the support rod (9), one end of the cross rod (10) is fixedly connected with a rotating wheel (11), one side wall of the gear (8) and the rotating wheel (11) is fixedly connected with an eccentric shaft (31) located on one side of the central axis of the gear (8) and the other side of the central axis of the rotating wheel (11), and two eccentric shafts (31) are movably connected with a connecting rod (14). The outer wall of the cross rod (10) is fixedly connected with an electric telescopic rod (12) in the middle, and one end of the electric telescopic rod (12) is provided with a clamp (13). The upper end surface of the shell (2) is fixedly connected with a rack (15) matched with the gear (8), one side wall of the rack (15) is fixedly connected with an L-shaped first connecting block (16), the front upper end of the shell (2) is fixedly connected with two baffle plates (17) distributed left and right, a screw rod (18) is rotatably connected between the two baffle plates (17), and the screw rod (18) penetrates through the first connecting block (16) and is threadedly connected with the first connecting block (16).

2. The sustainable sample loading fluorescence PCR instrument of claim 1, wherein: A first motor (19) is mounted on the inner side wall of the sample box (3), the output end of the first motor (19) is fixedly connected with a rotating disc (20), the other side wall of the rotating disc (20) is rotatably connected with a plurality of uniformly distributed sample trays (21), and the upper end surfaces of the plurality of sample trays (21) are each provided with a conical test tube groove (23).

3. The sustainable sample loading fluorescence PCR instrument of claim 1, wherein: The clamp (13) comprises a second connecting block (24) fixedly connected to one end of the electric telescopic rod (12), two connecting rods (25) fixedly connected to the lower end surface of the second connecting block (24), two grippers (26) rotatably connected to the other ends of the two connecting rods (25), a plurality of evenly distributed engagement grooves (27) formed in the connection portions of the two grippers (26), and a double-sided rack (28) engagedly connected between the two engagement grooves (27).

4. The sustainable sample loading fluorescence PCR instrument of claim 1, wherein: A second motor (29) is mounted on the other side wall of the left baffle plate (17), the output end of the second motor (29) penetrates through the baffle plate (17) and is fixedly connected with the screw rod (18).

5. The sustainable sample loading fluorescence PCR instrument of claim 3, wherein: A first air cylinder (30) is mounted in the second connecting block (24), the output end of the first air cylinder (30) penetrates through the second connecting block (24) and extends below the second connecting block (24), and the output end of the first air cylinder (30) is fixedly connected with the double-sided rack (28).

6. The sustainable sample loading fluorescence PCR instrument of claim 2, wherein: The lower end surfaces of the plurality of sample trays (21) are each fixedly connected with a counterweight block (22) located at the central position of the sample tray (21).

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