CN214004580U

CN214004580U - Micro-droplet chip crimping device provided with limiting assembly

Info

Publication number: CN214004580U
Application number: CN202022553972.7U
Authority: CN
Inventors: 白宇; 韩应敏; 刘金伟; 杜晓纯; 杨文军
Original assignee: Xinyi Manufacturing Technology Beijing Co ltd
Current assignee: Xinyi Manufacturing Technology Beijing Co ltd
Priority date: 2020-11-08
Filing date: 2020-11-08
Publication date: 2021-08-20
Anticipated expiration: 2030-11-08

Abstract

The utility model provides a micro-droplet chip crimping device with spacing subassembly, including the bed plate, be equipped with first backup pad and the second backup pad that relative interval set up on the bed plate, still include slip application of force board, linear displacement drive arrangement, the both ends of slip application of force board respectively one-to-one ground with first backup pad and second backup pad sliding connection, slip application of force board with form the space of placing of chip and reaction tube assembly spare between the bed plate, linear displacement drive arrangement is used for the drive slip application of force board orientation is perhaps kept away from bed plate linear motion. The utility model discloses can be automatic puncture chip and reaction tube cap and crimping, improve detection work efficiency.

Description

Micro-droplet chip crimping device provided with limiting assembly

Technical Field

The utility model belongs to the technical field of digital PCR analysis appearance, concretely relates to be provided with little liquid drop chip crimping device of spacing subassembly.

Background

Digital PCR is a recent quantitative technique, and nucleic acid quantification based on counting by a single-molecule PCR method is an absolute quantitative method. The method mainly adopts a microfluidic or micro-droplet method in the current analytical chemistry hot research field to disperse a large amount of diluted nucleic acid solution into micro-reactors or micro-droplets of a chip, wherein the number of nucleic acid templates in each reactor is less than or equal to 1. Thus, after PCR cycling, a reactor with a nucleic acid molecule template will give a fluorescent signal, and a reactor without a template will have no fluorescent signal. Based on the relative proportions and the volume of the reactor, the nucleic acid concentration of the original solution can be deduced. The eight-row tubes and the microfluidic chip for containing the micro-droplet system amplified by PCR are disposable articles, and in order to prevent the amplified DNA solution from polluting an operation chamber, the chip needs to puncture the caps of the eight-row tubes so that micro-droplets in the eight-row tubes enter channels in the chip for further analysis. Sufficient pressure is needed to ensure the sealing type of the channel hole on the chip after piercing, and the distance between the objective lens and the chip is required to be adjusted to an optimal value when analyzing micro-droplets in the chip, so that the objective lens is convenient to focus to obtain an optimal image to complete analysis.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model is to provide a little liquid drop chip crimping device, can be automatic puncture chip and reaction tube cap and crimping, improved detection work efficiency.

In order to solve the problem, the utility model provides a little liquid drop chip crimping device with spacing subassembly, including the bed plate, be equipped with the first backup pad and the second backup pad that relative interval set up on the bed plate and be provided with spacing subassembly, still include slip application of force board, linear displacement drive arrangement, the both ends of slip application of force board respectively one-to-one with first backup pad and second backup pad sliding connection, slip application of force board with form the space of placing of chip and reaction tube assembly spare between the bed plate, linear displacement drive arrangement is used for the drive slip application of force board orientation is perhaps kept away from bed plate linear motion.

Preferably, the linear displacement driving device comprises a through shaft type screw motor, a housing of the through shaft type screw motor is fixedly connected to the mounting plate, a screw rod connecting piece of the through shaft type screw motor is fixedly connected to one side of the sliding force application plate, which is far away from the base plate, and the mounting plate is erected between the first support plate and the second support plate.

Preferably, a photoelectric triggering piece is arranged on the sliding force application plate, a high-position photoelectric sensing assembly and a low-position photoelectric sensing assembly are arranged on the second supporting plate along a linear motion path of the sliding force application plate, and the high-position photoelectric sensing assembly, the low-position photoelectric sensing assembly and the photoelectric triggering piece are matched to form position determination of the sliding force application plate.

Preferably, the number of the limiting assemblies is two, and the two limiting assemblies are arranged on one side of the base plate facing the sliding force application plate at intervals and are used for limiting the chip and the reaction tube assembly in the horizontal direction and the vertical direction.

Preferably, the limiting assembly comprises a fixing seat and a guide block, wherein a mounting groove is formed in the fixing seat, the guide block is inserted into the mounting groove and partially protrudes out of one side of the fixing seat close to the chip and reaction tube assembly, and a chip seat in the chip and reaction tube assembly is provided with a threaded hole connected with the guide block.

Preferably, the base plate is further provided with a positioning groove, and the bottom end of the guide block is positioned in the positioning groove.

Preferably, the base plate is further provided with four sets of elastic members, two of the four sets of elastic members are arranged at the bottom of the first side of the chip holder, the other two sets of elastic members are arranged at the bottom of the second side of the chip holder, and the first side and the second side are oppositely arranged.

Preferably, the elastic component comprises a guide rod for connecting the base plate and a spiral spring sleeved on the guide rod, the bottom wall of the chip holder is provided with a circular groove matched with the spiral spring, the spiral spring is limited in the horizontal and vertical directions, and when the chip and reaction tube assembly component is placed in the placing space, the spiral spring is supported on the bottom wall of the chip holder.

Preferably, the base plate is formed with an objective lens through hole for placing an objective lens, the objective lens through hole being positioned to correspond to an observation window provided in the chip and the chip in the reaction tube assembly.

Preferably, the opposite side surfaces of the first support plate and the second support plate are respectively connected with a guide rail, the two ends of the sliding force application plate corresponding to the first support plate and the second support plate are provided with a sliding block, and a concave-convex structure is arranged between the sliding block and the guide rail to realize the sliding connection.

The utility model provides a micro-droplet chip crimping device, the linear displacement drive arrangement can drive the slide force plate to move linearly up and down, when the chip and reaction tube assembly component is placed in the placing space, the descending slide force plate will contact the upper surface of the chip in the chip and reaction tube assembly component (i.e. the side away from the chip seat) and gradually press down the chip, so that the tip of the lower surface of the chip (i.e. the side close to the chip seat) contacts with the tube cap in the tube bank component in the chip and reaction tube assembly component, and further pierces the tube cap, thereby the reaction liquid in the reaction tube can selectively communicate with the corresponding pipeline of the chip, therefore, the micro-droplet chip crimping device can automatically pierce and crimp the chip and the reaction tube cap, the detection work efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of a micro droplet chip crimping apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of a disassembled structure of the base plate, the chip and the reaction tube assembly shown in FIG. 1;

FIG. 3 is a schematic view of the disassembled structure of the chip and the reaction tube assembly according to the embodiment of the present invention;

fig. 4 is a schematic view of the micro droplet chip bonding apparatus according to the embodiment of the present invention in a state where no bonding force is applied to the chip;

fig. 5 is a schematic view of a state in which the micro droplet chip bonding apparatus according to the embodiment of the present invention applies a bonding force to the chip, where F denotes the bonding force.

The reference numerals are represented as:

1. a base plate; 11. a first support plate; 12. a second support plate; 121. a high photoelectric sensing component; 122. a low position photoelectric sensing component; 13. a sliding force application plate; 131. a photoelectric trigger; 14. a through-shaft screw motor; 141. a housing; 142. a screw rod connecting piece; 15. mounting a plate; 16. positioning a groove; 17. an objective lens through hole; 2. a chip and reaction tube assembly component; 21. a chip holder; 22. a chip; 23. the calandria bottom support; 24. an oiling needle; 25. a tube arranging seat; 26. a tube cover; 27. a reaction tube; 28. a chip guide shaft; 31. a fixed seat; 311. mounting grooves; 32. a guide block; 41. a guide bar; 42. a coil spring; 51. a guide rail; 52. a slider; 6. an objective lens.

Detailed Description

Referring to fig. 1 to 5 in combination, according to the embodiment of the present invention, a micro droplet chip crimping apparatus is provided, including a base plate 1, a first supporting plate 11 and a second supporting plate 12, which are arranged at a relative interval, are arranged on the base plate 1, and further including a sliding force application plate 13 and a linear displacement driving device, wherein two ends of the sliding force application plate 13 respectively correspond to the first supporting plate 11 and the second supporting plate 12 in a sliding manner, the sliding force application plate 13 and a placing space for forming a chip and a reaction tube assembly component 2 between the base plate 1 are provided, and the linear displacement driving device is used for driving the sliding force application plate 13 to move towards or keep away from the base plate 1 to perform linear motion. In the technical solution, the linear displacement driving device can drive the sliding force application plate 13 to move linearly up and down, when the chip and reaction tube assembly 2 is placed in the placement space, the downward sliding force application plate 13 will contact the upper surface (i.e. the side away from the chip holder 21) of the chip 22 in the chip and reaction tube assembly 2 and gradually press down the chip 22, so that the tip of the lower surface (i.e. the side close to the chip holder 21) of the chip 22 contacts the tube cap 26 in the tube array component of the chip and reaction tube assembly 2, and further pierces the tube cap 26, so that the reaction liquid in the reaction tube 27 can selectively communicate with the corresponding pipeline of the chip 22, thus it can be seen that the micro droplet chip crimping device of the present invention can automatically pierce and crimp the chip and the reaction tube cap, the detection work efficiency is improved.

Specifically, the opposite side surfaces of the first support plate 11 and the second support plate 12 are respectively connected with a guide rail 51, the two ends of the sliding force application plate 13 corresponding to the first support plate 11 and the second support plate 12 are provided with a slide block 52, and a concave-convex structure is arranged between the slide block 52 and the guide rail 51 to realize the sliding connection.

As a specific embodiment of the chip and reaction tube assembly 2 matched with the micro droplet chip crimping device of the present invention, the chip and reaction tube assembly 2 further comprises a tube bank support 23, a chip guide shaft 28 and an oil injection needle 24 in addition to the chip seat 21, the chip 22 and the tube bank assembly, the tube bank assembly comprises a reaction tube 27 and a tube cap 26 for sealing the opening of the reaction tube 27, the reaction tube 27 is seated on the tube bank seat 25, so as to realize the mechanical clamping transfer of the reaction tube 27 (eight tubes are adopted as a specific example of the present invention) by clamping the tube bank seat 25, as shown in fig. 3, the chip seat 21 serves as a common base for the chip 22 and the tube bank assembly, the tube bank support 23 is fixedly connected below the chip seat 21, the oil injection needle 24 is fixedly connected above the tube bank seat 21, the chip guide shaft 28 is fixedly connected in the holes above the two ends of the oil injection needle 24, the reaction tube 27 is located in the hole of the tube arranging seat 25, the tube cover 26 is located on the tube opening of the reaction tube 27, the tube arranging seat 25, the reaction tube 27 and the tube cover 26 are integrated into a tube arranging assembly which is located on the chip seat 21, the chip 22 is located above the chip seat 21, the lower part of the chip is contacted with the tube cover 26, and the chip 22 has a tip position corresponding to the tube cover 26, so that although the chip 22 is contacted with the tube cover 26, when the corresponding downward pressure (crimping pressure) is not applied, the tip does not pierce the tube cover 26 corresponding thereto, and further, a buckling structure is arranged between the chip 22 and the tube arranging seat 25, and it is reasonable that when the corresponding downward pressure is not applied, the chip 22 is placed above the tube arranging seat 25 only by its own weight, the snap fit structure will be forced to connect the chip 22 and the row tube seat 25 snap fit together.

The linear displacement driving device comprises a through shaft type screw motor 14, a shell 141 of the through shaft type screw motor 14 is fixedly connected to a mounting plate 15, a screw rod connecting piece 142 of the through shaft type screw motor 14 is fixedly connected to one side, away from the base plate 1, of the sliding force application plate 13, the mounting plate 15 is erected between the first supporting plate 11 and the second supporting plate 12, the sliding force application plate 13 can realize linear reciprocating motion in the height direction through the adoption of the through shaft type screw motor 14, and the structure is compact.

Further, in order to limit the limit position of the vertical linear motion of the sliding force application plate 13, a photoelectric trigger 131 is disposed on the sliding force application plate 13, a high-position photoelectric sensing element 121 and a low-position photoelectric sensing element 122 are disposed on the second support plate 12 along the linear motion path of the sliding force application plate 13, and the high-position photoelectric sensing element 121, the low-position photoelectric sensing element 122, and the photoelectric trigger 131 cooperate to determine the position of the sliding force application plate 13.

Preferably, the base plate 1 is provided with two limiting assemblies, and the two limiting assemblies are arranged on one side of the base plate 1 facing the sliding force application plate 13 at intervals and used for limiting the chip and reaction tube assembling assembly 2 in the horizontal direction and the vertical direction (a distance). Specifically, the limiting component includes a fixing seat 31 and a guide block 32, a mounting groove 311 is formed on the fixing seat 31, the guide block 32 is inserted into the mounting groove 311 and partially protrudes from one side of the fixing seat 31 close to the chip and reaction tube assembly 2, and a threaded hole connected with the guide block 32 is formed in the chip seat 21 of the chip and reaction tube assembly 2. The guide block 32 can restrict the X-Y axis freedom (parallel to the upper surface of the base plate 1) of the chip and reaction tube assembly 2 in the horizontal direction, and can make the Z axis freedom (perpendicular to the upper surface of the base plate 1) of the chip and reaction tube assembly 2 in the height direction, i.e., can adjust the height in the Z axis direction, so as to facilitate the adjustment of the distance between the chip 22 and the objective lens 6 under the chip 22 and adapted to the position of the observation window on the chip 22, thereby making the visual field clearer.

Furthermore, a positioning groove 16 is further formed in the base plate 1, and the bottom end of the guide block 32 is located in the positioning groove 16, at this time, the positioning groove 16 can prevent the guide block 32 from coming off from the fixing seat 31, so that the guiding reliability of the guide block 32 for the chip and reaction tube assembling component 2 is ensured.

The base plate 1 is further provided with four sets of elastic members, two of the four sets of elastic members are disposed at the bottom of the first side of the chip holder 21, and the other two are disposed at the bottom of the second side of the chip holder 21, the first side and the second side are disposed opposite to each other, the elastic members can be compressed after the chip and reaction tube assembling member 2 is placed in the placing space, thereby realizing a suspension balance state of the entire position of the chip and reaction tube assembling member 2, at this time, the bottom surface of the chip holder 21 is not in contact with the upper plane of the base plate 1, that is, there is a gap of 3mm in one embodiment, and when the upper slide force applying plate 13 applies downward force to the chip and reaction tube assembling member 2, the elastic members are further compressed, at this time, the bottom surface of the chip holder 21 contacts the upper plane of the base plate 1, and the aforementioned gap is eliminated, and at this time, correspondingly, the tip of the bottom of the chip 22 will pierce the tube cap 26 to form a controlled communication between the droplet channel on the chip 22 and the droplet in the reaction tube 27, and at the same time, the chip 22 and the chip holder 21 form a snap connection therebetween to form a structurally reliable whole with the chip and the reaction tube assembly 2. Specifically, the elastic component includes a guide rod 41 for connecting the base plate 1 and a coil spring 42 sleeved on the guide rod 41, the bottom wall of the chip holder 21 has a circular groove matched with the coil spring 42 to limit the coil spring 42 in the horizontal and vertical directions, and when the chip and reaction tube assembly 2 is placed in the placement space, the coil spring 42 is supported on the bottom wall of the chip holder 21. Further, the base plate 1 is formed with an objective lens insertion hole 17 for receiving the objective lens 6, and the position of the objective lens insertion hole 17 is adapted to the observation window of the chip 22 in the chip and reaction tube assembly 2, and it is understood that the objective lens 6 may be structurally fixed to the base plate 1, or may be separately provided from the base plate 1. By adopting the technical scheme, after the chip 22 and the tube cover 26 are pressed and connected, the through shaft type lead screw motor 14 slightly moves upwards, the elastic force of the spiral spring 42 enables the chip and the reaction tube assembly component 2 to move upwards, the elastic force of the spiral spring 42 can ensure the sealing performance of the chip and the reaction tube, leakage cannot occur, the position of the objective lens 6 is kept unchanged in the process, whether the objective lens 6 focuses on micro liquid drops in the chip 22 or not is judged through a related algorithm in the upward movement process of the through shaft type lead screw motor 14, and optical detection and analysis are carried out on the micro liquid drops after the focusing is judged.

The micro droplet chip crimping device of the present invention is further described below with reference to specific operation steps:

the initial action of the micro-droplet chip automatic crimping device is as follows: the through-shaft lead screw motor 14 rotates to drive the slider 52, the sliding force application plate 13, the lead screw connecting member 142, and the photoelectric trigger 131 to move upward along the guide rail 51 until the photoelectric trigger 131 triggers the upper slot-type optical coupler (an example of a specific implementation form of the aforementioned high-position photoelectric sensing element 121 or the low-position photoelectric sensing element 122, the same applies below), and the lead screw on the through-shaft lead screw motor 14 rises to the highest position and stops.

The eight rows of tubes (an example of a specific implementation manner of the reaction tube 27 mentioned above, the same below) contain micro-droplets amplified by PCR, the tube cap 26 is tightly fastened above the eight rows of tubes, the eight rows of tubes are tightly attached to the holes of the tube seat 25, the eight rows of tubes and the tube cap 26 are placed above the chip seat 21 as a whole by a manipulator or a human hand, the lower part of the eight rows of tubes is located in the holes of the chip seat 21 and is restrained by structure and gravity, when the position detection mechanism detects that the tube seat 25 is in place, the manipulator or the human hand places the chip 22 above the chip seat 21, the circular holes at the two sides of the chip 22 are matched with the chip guide shaft 28, the precise placement of the chip 22 is completed by structure and gravity, the tip penetrating through the tube cap 26 below the chip 22 is in contact with the tube cap 26, and the lower surface of the chip 22 is not in contact with the upper surface of the chip seat 21. Under the combined action of the elasticity of the spiral spring 42 and the structure limit of the fixed seat 31, a 3mm gap is formed between the bottom surface of the chip seat 21 and the upper surface of the base plate 1.

When the position detection mechanism detects that the chip 22 is in place, the through-shaft lead screw motor 14 is reactivated. The screw rod on the through-shaft screw rod motor 14 drives the sliding block 52, the sliding force application plate 13, the screw rod connecting piece 142 and the photoelectric triggering piece 131 to move downwards along the guide rail 51 from the highest point, the lower surface of the sliding force application plate 13 starts to contact with the upper surface of the chip 22, the chip 22 is subjected to pressure from the sliding force application plate 13 at the moment, the chip 22 and the tube bank assembly compress the spiral spring 42 and move downwards integrally by taking the groove of the fixing seat 31 as a guide, the screw rod continues to move downwards until the photoelectric triggering piece 131 triggers the groove-shaped optical coupler below, the lower surface of the chip seat 21 is contacted with the upper surface of the base plate 1 at the moment, and large pressure transmitted through the through-shaft screw rod motor 14 exists between the two surfaces. In the process, the chip 22 and the tube bank assembly are pressed by the sliding force application plate 13 to move downwards, the sharp end below the chip 22 for piercing the tube cover 26 finally pierces the tube cover 26 and is tightly attached, and the buckle below the chip is buckled with the tube bank seat 25, so that the chip 22, the tube bank seat 25, the eight-connected tube bank and the tube cover 26 are integrated. At this time, the lower surface of the chip 22 is in contact with the upper surface of the chip holder 21, and a large pressure is transmitted between the two surfaces through the shaft type lead screw motor 14.

After the tube cover 26 is pierced below the chip 22, amplified micro-droplets contained in the eight rows of tubes enter a channel in the chip 22 under the guidance of a control system and auxiliary oil, an optical path emits excitation light to the droplets in the channel of the chip 22 through the objective 6, then emitted light with specific wavelength in the droplets is collected through the objective 6, and then analysis is completed through an algorithm. Wherein the distance between the objective lens 6 and the chip 22 needs to be kept within a specific precision range to ensure the objective lens to be focused, so that the photographed image of the channel of the chip 22 is clearer to complete the algorithm analysis. Therefore, after the chip 22 pierces the tube cover 26 and the photoelectric trigger 131 triggers the slot-type optocoupler, the through-shaft lead screw motor 14 acts in reverse direction, so that the lead screw thereon moves upward slowly, and the chip 22 moves upward along with the chip and reaction tube assembly 2 under the elastic force of the coil spring 42. In the process, the optimal position of the chip in the height direction is found through an algorithm, the channel on the chip 22 is imaged most clearly, and the analysis of the DNA solution is most facilitated to be completed, and in the process, the spiral spring 42 needs to provide enough elasticity to ensure the tightness of the chip 22 and the oil injection needle 24, and liquid cannot leak.

After the analysis is completed, the motor acts to drive the slider 52, the sliding force application plate 13, the screw rod connecting piece 142 and the photoelectric trigger piece 131 to move upwards along the guide rail 51 until the photoelectric trigger piece 131 triggers the groove-shaped optical coupler above, and the screw rod on the through shaft type screw rod motor 14 rises to the highest position and stops. The chip 22, the rack holder 25, the eight-row pipes, and the pipe cover 26, which are tightly coupled, are taken out by a robot or a human hand and discarded in a waste bin. Replace the manifold base 25, the eight rows of tubes, the cap 26, the chip 22, etc., and begin a new cycle of piercing and detection analysis.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The micro-droplet chip crimping device provided with the limiting component is characterized by comprising a base plate (1), wherein a first supporting plate (11) and a second supporting plate (12) which are arranged at opposite intervals are arranged on the base plate (1), the limiting component is arranged on the base plate, the micro-droplet chip crimping device further comprises a sliding force application plate (13) and a linear displacement driving device, two ends of the sliding force application plate (13) are in sliding connection with the first supporting plate (11) and the second supporting plate (12) in a one-to-one correspondence mode respectively, a placing space of a chip and a reaction tube assembly component (2) is formed between the sliding force application plate (13) and the base plate (1), and the linear displacement driving device is used for driving the sliding force application plate (13) to face or be far away from the base plate (1) to perform linear motion.

2. The micro droplet chip crimping device according to claim 1, wherein the linear displacement driving device comprises a through-shaft screw motor (14), a housing (141) of the through-shaft screw motor (14) is fixedly connected to a mounting plate (15), a screw connecting member (142) of the through-shaft screw motor (14) is fixedly connected to a side of the sliding force application plate (13) facing away from the base plate (1), and the mounting plate (15) is erected between the first support plate (11) and the second support plate (12).

3. The micro droplet chip crimping device according to claim 1, wherein a photoelectric trigger (131) is disposed on the sliding force application plate (13), a high position photoelectric sensing component (121) and a low position photoelectric sensing component (122) are disposed on the second support plate (12) along a linear motion path of the sliding force application plate (13), and the high position photoelectric sensing component (121), the low position photoelectric sensing component (122) and the photoelectric trigger (131) cooperate to form a position determination of the sliding force application plate (13).

4. The micro droplet chip bonding apparatus according to claim 1, wherein the number of the limiting members is two, and two of the limiting members are spaced apart from each other on a side of the base plate (1) facing the sliding force applying plate (13) for limiting the chip and the reaction tube assembling unit (2) in the horizontal direction and the vertical direction.

5. The chip bonding device for micro liquid drop chips as claimed in claim 4, wherein the limiting component comprises a fixed seat (31) and a guide block (32), a mounting groove (311) is formed on the fixed seat (31), the guide block (32) is inserted into the mounting groove (311) and partially protrudes from one side of the fixed seat (31) close to the chip and reaction tube assembly component (2), and a threaded hole connected with the guide block (32) is formed on a chip seat (21) in the chip and reaction tube assembly component (2).

6. The micro droplet chip bonding apparatus according to claim 5, wherein a positioning groove (16) is further formed on the base plate (1), and the bottom end of the guide block (32) is located in the positioning groove (16).

7. The micro droplet chip crimping device according to claim 5, wherein the base plate (1) is further provided with four sets of elastic members, two of the four sets of elastic members being provided at a bottom of a first side of the chip holder (21) and two being provided at a bottom of a second side of the chip holder (21), the first side being opposite to the second side.

8. The micro droplet chip bonding apparatus according to claim 7, wherein the elastic member comprises a guide bar (41) for connecting the base plate (1) and a coil spring (42) fitted around the guide bar (41), the bottom wall of the chip holder (21) has a circular groove for fitting the coil spring (42), the coil spring (42) is restrained in horizontal and vertical directions, and the coil spring (42) is supported on the bottom wall of the chip holder (21) when the chip and reaction tube assembly (2) is placed in the placement space.

9. Micro droplet chip crimping device according to claim 1, characterized in that the base plate (1) is configured with an objective lens through hole (17) for placing an objective lens (6), the position of the objective lens through hole (17) being adapted to the viewing window of a chip (22) in the chip and reaction tube assembly (2).

10. The micro-droplet chip crimping device according to claim 1, wherein the first support plate (11) and the second support plate (12) are connected with a guide rail (51) on the opposite side surfaces, respectively, the sliding force application plate (13) is provided with a sliding block (52) corresponding to the two ends of the first support plate (11) and the second support plate (12), and the sliding connection is realized by a concave-convex structure between the sliding block (52) and the guide rail (51).