A micro-upgrade straw

Abstract

The utility model relates to a microliter suction tube, comprising a detachably connected suction tube (1) and an air bag tube (2), one end of the air bag tube (2) being inserted into a connecting outer tube (102) of the suction tube (1), and an exhaust groove (1021) communicating with the outside being provided on the inner wall of the connecting outer tube (102). The device can accurately achieve the absorption of 50 microliters of liquid.

Description

Technical Field

[0001] The utility model relates to a straw, in particular to a microliter-sized straw. Background Art

[0002] The straw usually includes a lower straw and an upper air bag. When the air bag is pressed to expel gas during liquid absorption, the air bag will rebound, allowing the lower straw to absorb the liquid. This method can be used without any problems when the straw absorbs milliliters of liquid.

[0003] However, when faced with microliter-level liquids, such as about 50 microliters of liquid, in order to absorb 50 microliters of liquid, after pressing the airbag, the deformation of the 50 microliter volume cannot enable the airbag to absorb the liquid. In order to absorb the liquid, the pressing amplitude must be increased, but this will cause the amount of liquid absorbed to far exceed 50 microliters. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a pipette that can accurately absorb 50 microliters of liquid.

[0005] The technical solution of the utility model is as follows:

[0006] A microliter straw, characterized in that it comprises a detachably connected straw (1) and an air bag tube (2), one end of the air bag tube (2) being inserted into an outer connecting tube (102) of the straw (1), and an exhaust groove (1021) communicating with the outside being provided on the inner wall of the outer connecting tube (102).

[0007] Furthermore, the suction tube (1) further comprises a suction head (101) connected to the connecting outer tube (102); the suction head (101) is a hollow tube, and a hydrophilic coating is provided inside the suction head (101).

[0008] Furthermore, the capacity of the pipette tip (101) is 10-60 μl.

[0009] Furthermore, the airbag tube (2) comprises an airbag (201) and a connecting inner tube (202) which are connected to each other, and the connecting inner tube (202) is inserted and connected to the connecting outer tube (102).

[0010] Furthermore, a raised convex ring (203) is provided on the outer side of the connecting inner tube (202).

[0011] Furthermore, the connecting outer tube (102) and the connecting inner tube (202) are both cylindrical.

[0012] Furthermore, the exhaust groove (1021) is axially arranged on the inner wall of the connecting outer tube (102).

[0013] Furthermore, the length of the exhaust groove (1021) is greater than the height of the connecting inner tube (202).

[0014] By means of the above solution, the utility model has at least the following advantages:

[0015] The device can accurately absorb 10-60 microliters, especially 50 microliters of liquid, and can discharge it conveniently.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model straw Figure 1 ;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model straw Figure 2 ;

[0020] Figure 4 It is a structural schematic diagram of the airbag tube of the utility model;

[0021] In the figure:

[0022] 1- straw; 101- suction head; 102- connecting outer tube; 1021- exhaust groove;

[0023] 2-airbag tube; 201-airbag; 202-connecting inner tube; 203-convex ring. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] See also Figure 1-Figure 4 A micro-liter straw according to a preferred embodiment of the utility model comprises a detachably connected straw 1 and an air bag tube 2, specifically a direct plug-in connection.

[0026] One end of the airbag tube 2 is inserted into the connecting outer tube 102 of the straw 1. An exhaust groove 1021 connected to the outside is provided on the inner wall of the connecting outer tube 102. After the airbag tube 2 and the straw 1 are connected, due to the existence of the exhaust groove 1021 at the connection, the connection between the two is not sealed, and the middle of the entire straw is equivalent to leaking air.

[0027] The pipette 1 also includes a pipette tip 101 connected to the outer tube 102. The pipette tip 101 is a hollow tube. The pipette tip 101 is needle-shaped and has a hydrophilic coating inside. It mainly plays the role of storing and measuring liquid. In this device, the capacity of the pipette tip 101 is 10-60 microliters, such as 10 microliters, 20 microliters, 30 microliters, 40 microliters, 50 microliters, and 60 microliters.

[0028] The airbag tube 2 includes an airbag 201 and a connection inner tube 202 which are connected to each other. The connection inner tube 202 is inserted and connected to the connection outer tube 102 .

[0029] A raised convex ring 203 is provided on the outer side of the connecting inner tube 202, and the convex ring 203 acts as a sealing ring.

[0030] The connecting outer tube 102 and the connecting inner tube 202 are both cylindrical, which is convenient for plugging and unplugging.

[0031] The exhaust groove 1021 is axially arranged on the inner wall of the connecting outer tube 102 , and the exhaust groove 1021 can be in a straight line shape or a curved line shape.

[0032] The length of the exhaust groove 1021 is greater than the height of the connecting inner tube 202 , so as to ensure that after the connecting inner tube 202 is installed, the exhaust groove 1021 can still allow the suction head 101 to communicate with the outside.

[0033] The working principle of the utility model is as follows:

[0034] When the device is used, the suction head 101 is directly placed in the liquid. Due to the presence of the hydrophilic coating, the liquid is directly sucked in. Due to the presence of the exhaust groove 1021, the excess gas inside can be discharged after the liquid is sucked in, thereby ensuring accurate suction of the liquid. When in use, the air bag can be directly squeezed.

[0035] The utility model has at least the following advantages:

[0036] The device can accurately absorb 10-60 microliters of liquid and can discharge it conveniently.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A microliter straw, characterized in that: It comprises a detachably connected straw (1) and an air bag tube (2), one end of the air bag tube (2) being inserted into an outer connecting tube (102) of the straw (1), and an exhaust groove (1021) communicating with the outside being provided on the inner wall of the outer connecting tube (102).

2. The microliter-sized straw according to claim 1, characterized in that: The suction tube (1) further comprises a suction head (101) connected to the connecting outer tube (102); the suction head (101) is a hollow tube; a hydrophilic coating is provided inside the suction head (101).

3. The microliter-sized straw according to claim 2, characterized in that: The capacity of the pipette tip (101) is 10-60 μl.

4. The microliter-sized straw according to claim 3, characterized in that: The airbag tube (2) comprises an airbag (201) and a connecting inner tube (202) which are connected to each other, and the connecting inner tube (202) is inserted and connected to the connecting outer tube (102).

5. The microliter-sized straw according to claim 4, characterized in that: A raised convex ring (203) is provided on the outer side of the connecting inner tube (202).

6. The microliter-sized straw according to claim 5, characterized in that: The connecting outer tube (102) and the connecting inner tube (202) are both cylindrical.

7. The microliter-sized straw according to claim 6, characterized in that: The exhaust groove (1021) is axially arranged on the inner wall of the connecting outer tube (102).

8. The microliter-sized straw according to claim 7, characterized in that: The length of the exhaust groove (1021) is greater than the height of the connecting inner tube (202).

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