Quantitative straw

Abstract

The utility model discloses a quantitative suction tube, which relates to the field of medical instruments and comprises a suction tube with an open lower end and a closed upper end, and a first reinforcing plate is arranged on one side of the suction tube; the liquid storage bag is fixedly connected with the first reinforcing plate, the upper end of the liquid storage bag is communicated with a first pipeline, and the end, opposite to the connecting end of the liquid storage bag, of the first pipeline is communicated with the suction pipe; the air bag is communicated with a second pipeline, the end, opposite to the end connected with the air bag, of the second pipeline is communicated with the upper end of the liquid storage bag, a second reinforcing plate is arranged on one side of the second pipeline, and the second reinforcing plate is fixedly connected with the liquid storage bag and the air bag; a boss is arranged on the circumferential side face of the capillary tube, the end, provided with the boss, of the capillary tube is inserted into the suction tube from the opening of the suction tube, the boss abuts against the inner wall of the opening of the suction tube to form a ventilation gap, the problem of complexity of the product structure can be solved, the product is simpler, and production is convenient.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a quantitative pipette. Background Art

[0002] When the sample needs to be quantitatively added to the reagent or container for analysis, the test analysis is performed. Because the sampling volumes are different, it is usually necessary to use two quantitative samplers or change the measurement of the pipetting equipment to perform two sampling and dropping operations, which is complicated and requires high equipment.

[0003] In the prior art, CN203044028U discloses a quantitative straw, which connects the liquid conduit with the outside through a vent pipe, so that the production process of the product is complicated. In addition, since the vent pipe is thin, the processing technology is required to be high, resulting in a high production cost. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the utility model provides a quantitative straw, which can solve the problem of high processing requirements and high production cost of the quantitative straw.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A quantitative straw comprises: a straw, the lower end of which is open and the upper end is closed, and a first reinforcing plate is provided on one side of the straw; a liquid storage bag, the liquid storage bag is fixedly connected to the first reinforcing plate, the upper end of the liquid storage bag is connected to a first pipe, and the first pipe is connected to the liquid storage bag end to end and is connected to the straw; an air bag, the air bag is connected to a second pipe, the second pipe is connected to the air bag end to end and is connected to the upper end of the liquid storage bag, a second reinforcing plate is provided on one side of the second pipe, and the second reinforcing plate is fixedly connected to both the liquid storage bag and the air bag; a capillary tube, a boss is provided on the circumferential side surface of the capillary tube, one end of the capillary tube provided with the boss is inserted into the straw from the straw opening, and the boss abuts against the inner wall of the straw opening to form a ventilation gap.

[0007] By adopting the above scheme, when the capillary is inserted into the straw, the boss on the capillary can create a ventilation gap between the capillary and the straw. When liquid is sucked into the capillary, the air in the straw can be discharged from the ventilation gap between the capillary and the straw. The capillary of corresponding capacity can be replaced according to actual needs.

[0008] Furthermore, a circle of blocks is provided on the capillary tube, and the blocks are provided with notches at the bosses.

[0009] By adopting the above solution, the block not only makes it easy to hand-hold the capillary into the catheter, but also facilitates automatic mechanical clamping and convenient replacement of the capillary when necessary. The notch on the block avoids blocking the ventilation gap between the boss on the capillary and the straw.

[0010] Furthermore, the stopper is flush with the lower end of the boss on one side facing the boss.

[0011] By adopting the above solution, the stopper can locate the bottom end of the boss to avoid excessive insertion or inadequate insertion of the capillary, which is convenient for matching with automated production equipment. When manual assembly is used, workers can also install the capillary more accurately.

[0012] Furthermore, the upper end of the capillary is provided with a chamfer.

[0013] By adopting the above solution, it is easy to insert the capillary into the catheter.

[0014] Furthermore, a groove is provided on the outer circumference of the straw at the lower end.

[0015] By adopting the above solution, the friction force is increased, so that it is convenient to pinch the catheter to insert the capillary into the catheter during manual assembly.

[0016] Furthermore, the first reinforcing plate and the second reinforcing plate are both provided with reinforcing ribs.

[0017] By adopting the above solution, the reinforcing ribs are arranged at the side positions of the first reinforcing plate and the second reinforcing plate, thereby increasing the toughness and strength of the reinforcing plates.

[0018] Furthermore, the capillary is made of a hydrophilic polymer material by one-time injection molding.

[0019] Furthermore, the straw is made of flexible material.

[0020] By adopting the above scheme, the capillary tube can be inserted into the straw to form a ventilation gap.

[0021] In summary, the quantitative straw provided by the utility model has the following technical effects:

[0022] 1. The capillary is inserted into the straw, and the boss on the capillary can create a ventilation gap between the capillary and the straw. When liquid is sucked into the capillary, the air in the straw can be discharged from the ventilation gap between the capillary and the straw. There is no need to set an air outlet on the straw, which reduces unnecessary production processes and increases production efficiency.

[0023] 2. Capillaries of corresponding capacity can be replaced according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the capillary structure of the utility model;

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0027] Among them, the meanings of the figure numbers are as follows: 1. Straw; 11. Trough body; 2. Liquid storage bag; 21. First reinforcing plate; 22. First pipeline; 3. Air bag; 31. Second reinforcing plate; 32. Second pipeline; 4. Capillary; 41. Boss; 42. Block; 421. Notch; 43. Chamfer; 5. Reinforcing rib. DETAILED DESCRIPTION

[0028] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] See also Figure 1-Figure 3The utility model discloses a quantitative straw, comprising: a straw 1, wherein the lower end of the straw 1 is open and the upper end is closed, a first reinforcing plate 21 is arranged on one side of the straw 1, a liquid storage capsule 2 is fixedly connected to the first reinforcing plate 21, the first reinforcing plate 21 can not only strengthen the strength of the straw 1, but also strengthen the connection strength between the straw 1 and the liquid storage capsule 2, a first pipe 22 is connected to the upper end of the liquid storage capsule 2, the first pipe 22 is connected to the liquid storage capsule 2 end to end and is connected to the straw 1, a second pipe 32 is connected to the upper end of the liquid storage capsule 2, the second pipe 32 is connected to the liquid storage capsule 2 end to end and is connected to the airbag 3, a second reinforcing plate 31 is arranged on one side of the second pipe 32, the second reinforcing plate 31 is connected to the liquid storage capsule The capsule 2 and the airbag 3 are fixedly connected. The first reinforcing plate 21 can not only strengthen the strength of the second pipe 32 of the straw 1, but also strengthen the connection strength between the liquid storage capsule 2 and the airbag 3. A capillary 4 is connected to the opening of the straw 1. A boss 41 is provided on the circumferential side of the capillary 4, and the boss 41 abuts against the inner wall of the opening of the straw 1 to form a ventilation gap. When the capillary 4 is inserted into the straw 1, the boss 41 on the capillary 4 can create a ventilation gap between the capillary 4 and the straw 1. When liquid is sucked into the capillary 4, the air in the straw 1 can be discharged from the ventilation gap between the capillary 4 and the straw 1. The capillary 4 of corresponding capacity can be replaced according to actual needs.

[0033] Among them, a circle of blocks 42 are provided on the capillary 4, and the block 42 is located at the boss 41 and has a notch 421. The block 42 not only makes it convenient to hold the capillary 4 into the catheter, but also facilitates automatic mechanical clamping, and can also facilitate replacement of the capillary 4 when needed. The notch 421 on the block 42 avoids blocking the ventilation gap between the boss 41 on the capillary 4 and the straw 1. The upper end of the capillary 4 is provided with a chamfer 43 to facilitate the insertion of the capillary 4 into the catheter.

[0034] Among them, the stop block 42 is flush with the lower end of the boss 41 on one side of the boss 41. The stop block 42 can locate the bottom end of the boss 41 to avoid the capillary 4 from being inserted too much or not inserted into place, which is convenient for matching with automated production equipment. When manual assembly is adopted, workers can also install the capillary 4 in place more accurately.

[0035] A groove 11 is provided at the lower end of the outer circumference of the straw 1 to increase friction, making it easier to insert the capillary tube 4 into the catheter by pinching the catheter during manual assembly.

[0036] The first reinforcing plate 21 and the second reinforcing plate 31 are both provided with reinforcing ribs 5 , which are arranged at the sides of the first reinforcing plate 21 and the second reinforcing plate 31 to increase the toughness and strength of the reinforcing plates.

[0037] Among them, the product of the cross-sectional area and the length of the inner cavity of the capillary 4 is the volume of the capillary 4. By appropriately selecting the inner diameter and length of the capillary 4, capillaries 4 of various capacity specifications can be made; such as 5 μl, 10 μl, 15 μl, 20 μl, ..., 50 μl, etc.

[0038] In addition, in this embodiment, the capillary is made of a hydrophilic polymer material by one-time injection molding, which further facilitates the production, processing, installation and other processes.

[0039] The working principle of the utility model is as follows: a capillary tube 4 of corresponding specifications is selected, and one end of the capillary tube 4 provided with a boss 41 is inserted into the straw 1, so that the inner cavity of the capillary tube 4, the inner cavity of the straw 1 and the inner cavity of the air bag 3 are interconnected, and the boss 41 on the capillary tube 4 can make a ventilation gap between the capillary tube 4 and the straw 1, so that the extended end of the capillary tube 4 is dipped into the liquid sample at an angle, and the liquid level of the sample to be taken must be lower than the lower surface of the stopper 42, and the capillary phenomenon can occur when the capillary tube 4 contacts the liquid, and the liquid can easily enter the capillary tube 4, and the air in the capillary tube 4 can be discharged from the ventilation gap between the capillary tube 4 and the straw 1, and the liquid sample is squeezed by the air bag. 3 is discharged into the buffer solution; since the pipette 1 is connected with the hollow liquid storage capsule 2, the bottom of the liquid storage capsule 2 is lower than the interface connecting the pipette 1 and the liquid storage capsule 2, and the interface is located on the pipette 1, so that the volume of the inner cavity composed of the pipette 1 and the capillary 4 below the interface becomes a constant value, and has the functions of quantitative liquid storage and transfer, then, first squeeze the air bag 3, immerse the capillary 4 and the bottom of the pipette 1 under the liquid surface, and then relax the air bag 3 to suck the buffer solution into the pipette 1. When the pipette 1 is filled, the extra liquid sucked flows into the liquid storage capsule 2 from the first pipe 22, and then the liquid is discharged into the test agent or container by squeezing the air bag 3 to achieve quantitative.

[0040] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. 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, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A quantitative straw, characterized in that: include: A straw (1), wherein the lower end of the straw (1) is open and the upper end is closed, and a first reinforcing plate (21) is provided on one side of the straw (1); A liquid storage capsule (2), the liquid storage capsule (2) being fixedly connected to the first reinforcing plate (21), the upper end of the liquid storage capsule (2) being connected to a first pipe (22), the first pipe (22) and the liquid storage capsule (2) being connected end to end to the suction pipe (1); An airbag (3), wherein the airbag (3) is connected to a second pipe (32), the second pipe (32) and the airbag (3) are connected end to end to the upper end of the liquid storage bag (2), a second reinforcing plate (31) is provided on one side of the second pipe (32), and the second reinforcing plate (31) is fixedly connected to both the liquid storage bag (2) and the airbag (3); A capillary tube (4) is provided with a boss (41) on the circumferential side surface of the capillary tube (4); one end of the capillary tube (4) provided with the boss (41) is inserted into the straw (1) from the opening of the straw (1); and the boss (41) abuts against the inner wall of the opening of the straw (1) to form a ventilation gap.

2. A quantitative drinking straw according to claim 1, characterized in that: The capillary (4) is made of a hydrophilic polymer material by one-time injection molding.

3. A quantitative drinking straw according to claim 1, characterized in that: A circle of blocks (42) is provided on the capillary tube (4), and the blocks (42) are provided with notches (421) at the bosses (41).

4. A quantitative drinking straw according to claim 3, characterized in that: The stopper (42) is flush with the lower end of the boss (41) on the side facing the boss (41).

5. A quantitative drinking straw according to claim 3, characterized in that: The upper end of the capillary tube (4) is provided with a chamfer (43).

6. A quantitative drinking straw according to claim 1, characterized in that: A groove body (11) is provided on the outer circumference of the suction tube (1) at one end where the capillary tube (4) is installed.

7. A quantitative drinking straw according to claim 1, characterized in that: Reinforcing ribs (5) are provided on both the first reinforcing plate (21) and the second reinforcing plate (31).

8. A quantitative drinking straw according to claim 6, characterized in that: The straw (1) is made of flexible material.

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