Connecting device of rotating body for medical detection

Abstract

The utility model discloses a connecting device of a rotating body for medical detection, which comprises a rotating body fixing seat comprising a centering guide part and an insertion part positioned at the upper end of the centering guide part; the rotating body comprises a centering guide groove formed in the lower end face of the rotating body and a limiting groove formed in the upper end of the centering guide groove, and the upper end of the centering guide groove is connected with the lower end of the limiting groove; the centering guide groove is configured to allow the rotating body fixing seat to be inserted therein, and can be matched with the centering guide part to center the rotating body fixing seat and the rotating body; the inserting part is configured to be inserted into the limiting groove in the state that the centering guide groove and the centering guide part are matched with each other and used for circumferentially limiting the rotating body relative to the rotating body fixing base.

Description

Technical Field

[0001] The utility model relates to a fixing device for a rotating body, in particular to a fixing device for a rotating body comprising a centrifugal microfluidic chip. Background Art

[0002] Centrifugal microfluidic chips are rotating bodies used for medical testing. They can integrate a series of basic operating units involved in the fields of chemistry and biology, such as sample preparation, reaction, separation, and detection, into a small chip. At the same time, the network formed by the microchannels can run through the entire system, with the advantages of precision, high efficiency, miniaturization of instruments, low reagent consumption, and small sample usage. Centrifugal microfluidic chips are usually designed with multiple flow channels to distribute the samples to be tested into multiple reaction chambers, and perform multiple tests on the same sample.

[0003] When in use, the centrifugal microfluidic chip needs to be connected to a chip holder fixedly connected to the rotating shaft, and the rotating shaft is driven to rotate by a motor, thereby driving the chip holder to rotate, and the centrifugal microfluidic chip rotates synchronously with the chip holder.

[0004] In some related technologies, the connection method between the centrifugal microfluidic chip and the chip holder is generally to use a plurality of protruding marbles driven by elastic elements distributed circumferentially on the peripheral side wall of the chip holder to clamp the mounting hole of the centrifugal microfluidic chip for nesting the chip holder. This connection structure is complex and has high manufacturing requirements. In addition, when rotating at high speed, the centrifugal microfluidic chip is easy to slip off the chip holder.

[0005] How to enable a centrifugal microfluidic chip to be connected to a chip holder quickly and stably, and to enable the chip to rotate stably and at high speed along with a rotating shaft is an urgent problem to be solved in the art.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Utility Model Content

[0007] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a connecting device for a rotating body for medical testing in view of the deficiencies in the prior art. The rotating body may include a centrifugal microfluidic chip. The connecting device can ensure that the centrifugal microfluidic chip rotates at high speed and stably with the rotating shaft while achieving rapid connection and disassembly.

[0008] In order to solve the above technical problems, the utility model discloses a connecting device for a rotating body for medical detection, which comprises:

[0009] The rotating body fixing seat comprises a centering guide portion and an inserting portion located at an upper end of the centering guide portion;

[0010] and a rotating body, comprising a centering guide groove formed on the lower end surface of the rotating body and a limiting groove opened on the upper end of the centering guide groove, wherein the upper end of the centering guide groove is connected to the lower end of the limiting groove;

[0011] The centering guide groove is configured to allow the rotating body fixing seat to be inserted therein, and can cooperate with the centering guide portion to center the rotating body fixing seat and the rotating body;

[0012] The inserting portion is configured to be inserted into the limiting groove in a state where the centering guide groove and the centering guide portion cooperate with each other, so as to circumferentially limit the rotating body relative to the rotating body fixing seat.

[0013] In some embodiments, the centering guide groove includes an inner conical surface, and the diameter of the inner conical surface gradually decreases along the insertion direction of the insertion portion of the rotating body fixing seat. The centering guide portion includes an outer conical surface that matches the inner conical surface.

[0014] In some embodiments, the inserting portion is a column with a polygonal cross section, and the limiting groove cooperates with the inserting portion.

[0015] In some embodiments, the inserting portion is a regular polygonal prism, and the limiting groove is a regular polygonal prism groove matching the inserting portion.

[0016] In some embodiments, the number of side edges of the regular polygonal prism ranges from 6 to 20.

[0017] In some embodiments, the limiting groove is a through groove.

[0018] In some embodiments, the cone angle of the conical surface ranges from 10° to 30°.

[0019] In some embodiments, the rotating body fixing seat is used to be connected to the rotating shaft of the detection device.

[0020] In some embodiments, the rotating body comprises a centrifugal microfluidic chip.

[0021] In some embodiments, the centrifugal microfluidic chip is a sliced ​​centrifugal microfluidic chip, including a disc tray and a microfluidic disc; the centering guide groove and the limit groove of the rotating body are both formed on the disc tray.

[0022] Beneficial effects:

[0023] 1) The utility model discloses a connection device for a rotating body for medical detection, wherein the rotating body can be a centrifugal microfluidic chip. When in use, the rotating body fixing seat can be fixedly connected to the rotating shaft of the detection device. When placing the centrifugal microfluidic chip, due to the effects of gravity and the centering guide part, the centrifugal microfluidic chip will automatically fit on the centering guide part during the falling process, and then the rotating shaft rotates, and the centering guide part and the centering guide groove make the centrifugal microfluidic chip and the rotating body fixing seat automatically coaxial to achieve centering, and the insertion part is inserted into the limiting groove and the centrifugal microfluidic chip is circumferentially limited relative to the rotating body fixing seat. Since the insertion part is inserted into the limiting groove and the centrifugal microfluidic chip is circumferentially limited relative to the rotating body fixing seat, compared with the prior art of the marble clamping method driven by the elastic element, the present application can ensure that the centrifugal microfluidic chip and the rotating body fixing seat are stably connected when the rotating shaft rotates at high speed.

[0024] 2) The connection device of the rotating body for medical testing disclosed in the utility model has the characteristics of convenient connection and disassembly. Specifically, firstly, when connecting, the centrifugal microfluidic chip and the rotating body fixing seat are automatically coaxial and centered by rotating the shaft and cooperating with the centering guide part and the centering guide groove. Compared with the manual centering in the prior art, the above-mentioned centering process of the present application is more convenient; secondly, when disassembling, it is only necessary to lift up the centrifugal microfluidic chip to separate it from the rotating body fixing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, and the above and / or other advantages of the present invention will become more clear.

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of a connecting device for a rotating body for medical detection disclosed in the first embodiment of the utility model, wherein the rotating body is a centrifugal microfluidic chip.

[0027] Figure 2 for Figure 1 A front view of a connecting device for a rotating body for medical testing is shown.

[0028] Figure 3 for Figure 2 A top view of a connection device for a rotating body for medical testing is shown.

[0029] Figure 4 for Figure 2 The main cross-sectional view of the connecting device of the rotating body for medical detection is shown.

[0030] Figure 5 It is a front schematic diagram of the three-dimensional structure of the rotating body fixing seat disclosed in the first embodiment of the utility model.

[0031] Figure 6 It is a front schematic diagram of the three-dimensional structure of the rotating body disclosed in the first embodiment of the utility model.

[0032] Description of the accompanying drawings:

[0033] 1. Rotating body fixing seat; 11. Centering guide part; 12. Insertion part; 13. Rotating shaft insertion hole; 2. Rotating body; 21. Centering guide groove; 22. Limiting groove; 210. Disc tray; 220. Microfluidic disc; 3. Motor; 31. Rotating shaft; 4. Connection part. DETAILED DESCRIPTION

[0034] In some related technologies, the connection method between the centrifugal microfluidic chip and the chip holder generally adopts a method of distributing a plurality of protruding marbles driven by elastic elements on the peripheral side wall of the chip holder in a circumferential direction to clamp the mounting hole of the centrifugal microfluidic chip for nesting the chip holder. This connection structure is composed of multiple parts, and has the disadvantages of complex structure, high manufacturing requirements, and the centrifugal microfluidic chip is easy to slip off the chip holder when rotating at high speed.

[0035] Example 1

[0036] Based on this, see Figures 1 to 6 This embodiment discloses a connection device for a rotating body for medical detection, which includes a rotating body fixing seat 1 and a rotating body 2. When in use, the rotating body 2 is sleeved downward on the upper part of the rotating body fixing seat 1 along the vertical direction.

[0037] See also Figure 4 The rotating body fixing seat 1 includes a centering guide portion 11 and an inserting portion 12 located at the upper end of the centering guide portion 11. The rotating body 2 includes a centering guide groove 21 formed on the lower end surface of the rotating body 2 and a limiting groove 22 opened at the upper end of the centering guide groove 21, and the upper end of the centering guide groove 21 is connected to the lower end of the limiting groove 22.

[0038] The centering guide groove 21 is configured to allow the rotating body fixing seat 1 to be inserted therein, and can cooperate with the centering guide portion 11 to center the rotating body fixing seat 1 and the rotating body 2 .

[0039] The inserting portion 12 is configured to be inserted into the limiting groove 22 in a state where the centering guide groove 21 cooperates with the centering guide portion 11 , so as to limit the circumferential position of the rotating body 2 relative to the rotating body fixing seat 1 .

[0040] The present embodiment discloses a connection device for a rotating body for medical detection, wherein the rotating body 2 is a sliced ​​centrifugal microfluidic chip, including a disc tray 210 and a plurality of microfluidic discs 220. Each microfluidic disc 220 is formed with a detection unit. The detection units of each microfluidic disc can be the same or different. Specifically, a centering guide groove 21 and a limit groove 22 are formed on the disc tray 210. The rotating body fixing seat 1 serves as a chip mounting seat, which is used to be connected to the rotating shaft 31 of the detection device. The rotating shaft 31 can be the rotating shaft of the motor 3.

[0041] Before placing the centrifugal microfluidic chip, the rotating body fixing seat 1 as the chip fixing seat is first fixedly connected to the rotating shaft 31 of the detection device. When placing the centrifugal microfluidic chip, due to the effect of gravity and the centering guide part, the centrifugal microfluidic chip will automatically be sleeved on the centering guide part 11 during the falling process, and then the rotating shaft 31 drives the rotating body fixing seat 1 to rotate, and the centering guide part 11 and the centering guide groove 21 make the centrifugal microfluidic chip and the rotating body fixing seat 1 automatically coaxial to achieve centering. At the same time, when achieving centering, the insertion part 12 is inserted into the limiting groove 22 and the centrifugal microfluidic chip is circumferentially limited relative to the rotating body fixing seat 1, so as to achieve a stable connection between the centrifugal microfluidic chip and the rotating body fixing seat 1 when the rotating shaft 31 rotates at high speed.

[0042] When disassembling, the centrifugal microfluidic chip can be separated from the rotating body fixing seat 1 by simply lifting it upwards.

[0043] It can be seen that in addition to achieving a stable connection between the centrifugal microfluidic chip and the rotating body fixing seat 1 when the shaft rotates at high speed, the connecting device of the rotating body for medical detection disclosed in this embodiment also has the characteristics of convenient connection and disassembly.

[0044] In addition, the connection device of the rotating body for medical detection disclosed in this embodiment does not require elastic elements, etc., has a simple structure, and has relatively low manufacturing requirements.

[0045] In some embodiments, Figure 4 As shown, the centering guide groove 21 includes an inner conical surface, and the diameter of the inner conical surface gradually decreases along the insertion direction of the insertion portion 12 of the rotating body fixing seat 1. Figure 5 As shown, the centering guide portion 11 includes an outer conical surface that matches the inner conical surface.

[0046] It should be understood that the center lines of the inner conical surface and the outer conical surface are coaxial with the rotation axis of the rotating shaft.

[0047] In this embodiment, after the inner conical surface and the outer conical surface are fitted together, the center guide groove 21 and the centering guide portion 11 cooperate with each other.

[0048] In some embodiments, Figure 5As shown, the insertion portion 12 is a column with a polygonal cross section, and the limiting groove 22 matches the insertion portion 12. In some specific embodiments, the insertion portion 12 is a regular polygonal prism, and the limiting groove 22 is a regular polygonal prism groove matching the insertion portion 12. Preferably, the number of side edges of the regular polygonal prism ranges from 6 to 20. In other embodiments, the insertion portion 12 can be a pyramid structure, which is not shown in the figure.

[0049] In some embodiments, Figure 4 As shown, the limiting groove 22 is a through groove.

[0050] In some embodiments, the cone angle of the conical surface 211 ranges from 10° to 30°.

[0051] In some embodiments, Figure 4 As shown, the rotating body fixing seat 1 includes a rotating shaft insertion hole 13, which is arranged on the lower end surface of the rotating body fixing seat 1 for inserting the upper part of the rotating shaft 31 to align the rotating shaft 31 and the rotating body fixing seat 1.

[0052] In order to limit the rotation body fixing seat 1 relative to the rotation shaft 31 in both the vertical direction and the circumferential direction, a connection structure is formed between the rotation shaft 31 and the rotation body fixing seat 1, and the connection structure can be a latch-type connection structure. Since the fixed connection between the rotation shaft 31 and the rotation body fixing seat 1 belongs to the prior art, the latch-type connection structure is not shown in the figure.

[0053] In some embodiments, Figure 4 As shown, the connection 4 between the chip mounting seat and the rotating shaft 31 is concave.

[0054] Example 2

[0055] Different from the embodiment 1, the rotating body 2 in this embodiment is a single-chip centrifugal microfluidic chip, which is not shown in the figure. A plurality of detection units thereon are formed on a disc-shaped chip monomer.

[0056] The utility model provides a concept and method for a connection device of a rotating body for medical detection. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications should also be regarded as the protection scope of the utility model. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A connecting device for a rotating body for medical detection, characterized in that: include: A rotating body fixing seat (1) comprises a centering guide portion (11) and an insertion portion (12) located at the upper end of the centering guide portion (11); and a rotating body (2), comprising a centering guide groove (21) formed on the lower end surface of the rotating body (2) and a limiting groove (22) opened at the upper end of the centering guide groove (21), wherein the upper end of the centering guide groove (21) is connected to the lower end of the limiting groove (22); The centering guide groove (21) is configured to allow the rotating body fixing seat (1) to be inserted therein, and to cooperate with the centering guide portion (11) to center the rotating body fixing seat (1) and the rotating body (2); The insertion portion (12) is configured to be inserted into the limiting groove (22) when the centering guide groove (21) and the centering guide portion (11) cooperate with each other, so as to limit the circumferential position of the rotating body (2) relative to the rotating body fixing seat (1).

2. The connecting device for a rotating body for medical detection according to claim 1, characterized in that: The centering guide groove (21) comprises an inner conical surface, the diameter of which gradually decreases along the insertion direction of the insertion portion (12) of the rotating body fixing seat (1); and the centering guide portion (11) comprises an outer conical surface that matches the inner conical surface.

3. The connecting device for a rotating body for medical detection according to claim 2, characterized in that: The inserting portion (12) is a column with a polygonal cross section, and the limiting groove (22) matches the inserting portion (12).

4. The connecting device for a rotating body for medical detection according to claim 3, characterized in that: The insertion portion (12) is a regular polygonal prism, and the limiting groove (22) is a regular polygonal prism groove matching the insertion portion (12).

5. The connecting device for a rotating body for medical detection according to claim 4, characterized in that: The number of side edges of the regular polygonal prism ranges from 6 to 20.

6. The connecting device for a rotating body for medical detection according to claim 5, characterized in that: The limiting groove (22) is a through groove.

7. The connecting device of the rotating body for medical detection according to claim 2, characterized in that: The cone angle of the conical surface (211) has a value range of 10° to 30°.

8. The connecting device for a medical detection rotating body according to any one of claims 1 to 7, characterized in that: The rotating body fixing seat (1) is used to be connected to the rotating shaft (31) of the detection device.

9. The connecting device for a rotating body for medical detection according to claim 8, characterized in that: The rotating body (2) comprises a centrifugal microfluidic chip.

10. The connecting device of the rotating body for medical detection according to claim 9, characterized in that: The centrifugal microfluidic chip is a sliced ​​centrifugal microfluidic chip, comprising a disc tray (210) and a microfluidic disc (220); the centering guide groove (21) and the limiting groove (22) of the rotating body (2) are both formed on the disc tray (210).

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