High-speed centrifugal machine rotor suitable for various card type micro-fluidic chips

Abstract

A high-speed centrifugal machine rotor suitable for various card type micro-fluidic chips comprises a disc-shaped rotor body and elastic pressing pieces, a plurality of containing grooves are evenly distributed in the upper surface of the rotor body, the length direction of the containing grooves is consistent with the radial direction of the rotor body, the elastic pressing pieces are arranged above the containing grooves, one end of each elastic pressing piece extends to the middle of the corresponding containing groove, and the other end of each elastic pressing piece extends to the middle of the corresponding containing groove. The other end is connected with the upper surface of the central part of the rotor main body, and a sleeving hole is formed in the center of the rotor main body; according to the centrifugal machine rotor, the containing groove is formed in the surface of the rotor body and used for containing the card type micro-fluidic chip, the elastic pressing piece capable of adjusting the pressing angle and height is arranged to press the card type micro-fluidic chip, and the phenomenon of falling off in the rotating centrifugal process is prevented; card-type micro-fluidic chips of various specifications and sizes can be installed and fixed in the rotor main body, the operation is simple, the compatibility and the adaptability are strong, and the experiment equipment cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro -fluidic centrifuge rotor field especially suitable for high -speed centrifuge rotor of a variety of cassette type micro -fluidic chip. BACKGROUND

[0002] Centrifugal micro -fluidic chip is a kind of micro -fluidic system integrated with multiple chemical and biological analysis functions, and the system takes centrifugal force as liquid flow driving force, realizes the micro -fluidic system of liquid flow detection analysis.In the centrifugal micro -fluidic chip, micro -channel is distributed along the radial direction of disc, which is consistent with the direction of centrifugal force, fluid is preloaded in the liquid storage pool close to the center of disc, when the disc is rotated by centrifuge, fluid moves along the micro -channel network under the action of centrifugal force in the direction of moving away from the center of disc to the edge of rotation.Drive speed can be adjusted by changing the speed of centrifuge, and it is very convenient to adjust;Make multiple parallel analysis units of centrifugal chip can detect multiple samples online.At present, small volume and high speed miniature micro -fluidic centrifuge is widely applied due to low cost and not needing large placing space, and the centrifuge on the market is usually only suitable for fixed size cassette type micro -fluidic chip, and the centrifuge rotor of corresponding size needs to be equipped when replacing new size micro -fluidic chip experiment, and the compatibility is poor and the equipment cost is increased, which needs to be improved. SUMMARY

[0003] In order to solve the above problems, the utility model provides a kind of high -speed centrifuge rotor suitable for a variety of cassette type micro -fluidic chip.

[0004] The technical scheme of the utility model is: a kind of high -speed centrifuge rotor suitable for a variety of cassette type micro -fluidic chip, including disc-shaped rotor main body and elastic pressing piece, the upper surface of rotor main body is evenly distributed with several containing grooves, the containing groove is rectangular slot body, the length direction of containing groove is consistent with the radial direction of rotor main body, the outer end of containing groove is close to the edge of rotor main body, and the inner end is close to the center of rotor main body, and the upper surface of the center part of rotor main body is connected with the other end of elastic pressing piece, and the center of rotor main body is provided with sleeve hole.

[0005] Preferably, the rotor main body is provided with threaded hole on the inner end of containing groove, adjusting bolt is connected in threaded hole, elastic pressing piece is sleeved with adjusting bolt through the through hole of its end portion, and elastic pressing piece is sleeved on adjusting bolt and can rotate freely.

[0006] Preferably, the bolt body between the nut head of elastic pressing piece and adjusting bolt is sleeved with spring, the size of the spring is greater than the size of the adjusting bolt body, so that it can be freely stretched and contracted, and the spring presses elastic pressing piece tightly on the upper surface of rotor main body.

[0007] Preferably, the sleeve hole is coaxially provided with a shaft sleeve, a circular through hole is arranged in the shaft sleeve, the shaft sleeve extends out of the rotor body and the bottom surface at both ends, at least two clamping screws are arranged in the radial direction at the lower end of the shaft sleeve, and threaded holes are arranged in the radial direction on the shaft sleeve, and the clamping screws are arranged in the threaded holes.

[0008] Preferably, the elastic pressing plate is wavy, the elastic pressing plate is made of steel, and the outer end of the elastic pressing plate is a downward bending pressing part which naturally extends into the accommodating groove.

[0009] Preferably, the rotor body is made of aluminum alloy, and the surface of the rotor body is sprayed with rust-proof paint.

[0010] The centrifuge rotor of the utility model is placed with the cassette micro-fluidic chip through the accommodating groove arranged on the surface of the rotor body, and the cassette micro-fluidic chip is pressed tightly through the elastic pressing plate capable of adjusting the pressing angle and height, so that the phenomenon of falling off in the rotating centrifugal process is prevented, various specifications and sizes of cassette micro-fluidic chips can be installed and fixed in the rotor body, the operation is simple, the compatibility and adaptability are strong, and the equipment cost of analysis and detection experiment is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a three-dimensional structure schematic view of the utility model;

[0012] Figure 2 is a top view structure schematic view of the utility model;

[0013] Figure 3 is Figure 2 A-A sectional view structure schematic view of the utility model;

[0014] Figure 4 is a side view structure schematic view of the utility model;

[0015] Figure 5 is a three-dimensional structure schematic view of the rotor body of the utility model.

[0016] In the figure, 1. rotor body, 11. accommodating groove, 12. threaded hole, 2. elastic pressing plate, 21. pressing part, 3. adjusting bolt, 4. spring, 5. shaft sleeve, 6. clamping screw, 7. driving shaft. DETAILED DESCRIPTION

[0017] Example one, referring to the accompanying Figures 1-25. A high-speed centrifuge rotor suitable for various card-type microfluidic chips, comprising a disc-shaped rotor body 1 and an elastic pressure plate 2. The upper surface of the rotor body 1 is evenly distributed with a plurality of receiving grooves 11. The length direction of the receiving grooves is consistent with the radial direction of the rotor body 1. The receiving grooves 11 are used to place card-type microfluidic chips. An elastic pressure plate 2 is provided above the receiving grooves 11. One end of the elastic pressure plate extends to the middle of the receiving groove 11 and presses the card-type microfluidic chip tightly through the pressure generated by its own elastic deformation. The other end is connected to the upper surface of the center of the rotor body 1, and a sleeve hole is provided at the center of the rotor body 1.

[0018] A bushing 5 is coaxially provided in the socket hole. The two ends of the bushing extend out of the upper surface and bottom surface of the rotor body 1. At least two set screws 6 are provided radially at the lower end of the bushing 5. The drive shaft 7 of the centrifuge is inserted into the bushing 5 and fixed by the set screws 6. The centrifuge can be started to drive the card microfluidic chip to rotate.

[0019] The elastic pressure plate 2 is generally wavy and curved. The outer end of the elastic pressure plate is a downwardly curved clamping part 21. The clamping part contacts the upper surface of the microfluidic chip to clamp it. The clamping part is located at a low position, so it can generate a strong clamping force.

[0020] The rotor body 1 is made of aluminum alloy and coated with anti-rust paint. The rotor body 1 is not prone to rust, which avoids contamination of the microfluidic chip and also improves its service life.

[0021] In this embodiment, during centrifugation, the elastic pressure plate 2 is lifted, and the card-type microfluidic chip is placed in the receiving groove 11 on the rotor body 1. The elastic pressure plate 2 is then lowered, and it is pressed and fixed by its own elastic pressure. The centrifuge lid is then closed, and the centrifuge is started. The centrifuge drive shaft 7 drives the rotor body 1 to rotate and centrifuge the chip. After centrifugation, the elastic pressure plate 2 is lifted, the chip is removed, and the elastic pressure plate 2 is reset. This prevents the chip from falling off during the centrifugation process. Card-type microfluidic chips of various specifications and sizes can be pressed and fixed in the rotor body 1. The operation is simple, and the compatibility and adaptability are strong.

[0022] Example 2, see appendix Figures 3-4The embodiment is same as the embodiment one, the same part is not described again, the different part is that the rotor body 1 of the end of the accommodating groove 11 is provided with a threaded hole 12, the threaded hole is connected with an adjusting bolt 3, the elastic pressing piece 2 is sleeved with the adjusting bolt 3 through the through hole of the end, can move up and down along the adjusting bolt 3 to realize the pressing height adjustment, and can rotate freely with the adjusting bolt 3 as the center, the spring 4 is sleeved on the bolt body between the elastic pressing piece 2 and the nut head of the adjusting bolt 3, the spring presses the elastic pressing piece 2 on the upper surface of the rotor body 1, the elastic pressure is applied to the end of the elastic pressing piece through the spring 4, the end of the elastic pressing piece 2 is pressed, the elastic pressing piece 2 presses the card type micro-fluidic chip in the accommodating groove 11 through the elastic deformation of the elastic pressing piece 2, therefore the elastic pressing piece 2 generates the pressing force, and the elastic pressing piece 2 also has a certain angle and height of the activity amount, which is beneficial to improve the pressing and fixing effect of the card type micro-fluidic chip of various specifications and sizes.

[0023] In addition, the elastic pressure of the spring 4 can be adjusted by screwing the adjusting bolt 3, and the end pressing degree of the elastic pressing piece 2 is corrected and adjusted.

Claims

1. A high speed centrifuge rotor suitable for use with a variety of cassette microfluidic chips, characterized by: The rotor body is disc-shaped and is provided with elastic pressing pieces, the upper surface of the rotor body is uniformly provided with a plurality of accommodating grooves, the length direction of the accommodating grooves is consistent with the radial direction of the rotor body, the elastic pressing pieces are arranged above the accommodating grooves, one end of the elastic pressing pieces extends to the middle part of the accommodating grooves, the other end of the elastic pressing pieces is connected with the upper surface of the central part of the rotor body, and a sleeve joint hole is arranged in the center of the rotor body.

2. The high-speed centrifuge rotor suitable for various card-type microfluidic chips according to claim 1, characterized in that: A threaded hole is arranged in the rotor body at the inner end of the accommodating grooves, an adjusting bolt is connected in the threaded hole, and the elastic pressing pieces are sleeved with the adjusting bolt through the through holes in the end parts of the elastic pressing pieces.

3. The high-speed centrifuge rotor suitable for various card-type microfluidic chips according to claim 2, characterized in that: A spring is sleeved on the bolt body between the elastic pressing pieces and the nut head of the adjusting bolt, and the spring presses the elastic pressing pieces against the upper surface of the rotor body.

4. The high-speed centrifuge rotor suitable for various card-type microfluidic chips according to claim 1, characterized in that: A shaft sleeve is coaxially arranged in the sleeve joint hole, the shaft sleeve extends out of the upper surface and the bottom surface of the rotor body at both ends, and at least two clamping screws are arranged in the lower end part of the shaft sleeve along the radial direction.

5. The high-speed centrifuge rotor suitable for various card-type microfluidic chips according to claim 1, characterized in that: The elastic pressing pieces are integrally curved in a wave shape, and the outer end parts of the elastic pressing pieces are downwardly curved pressing parts.

6. The high-speed centrifuge rotor suitable for various card-type microfluidic chips according to claim 1, characterized in that: The rotor body is made of aluminum alloy, and rust-proof paint is sprayed on the surface of the rotor body.

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