CN113984455A - Micro-sampler - Google Patents

Abstract

The utility model provides a micro sampler, includes blood sampling device casing, two segmentation pressing means, capillary straw, the blood sampling device casing includes pen-holder, lower pen-holder, cap for brush, nib cover, two segmentation pressing means include big spring, little spring, piston, nylon gasket, sealing washer, thimble, rubber circle, the shape of sampling device casing similarity pen easily the centre gripping, is provided with the scale mark on the capillary straw, can absorb inspection liquid through the capillary straw, and sampling speed is fast, and it is high to take the accuracy, and the ration is accurate, and the capillary straw inserts the back from the nib cover, with lower pen-holder and rubber cover mutual extrusion and not drop, simple to operate is swift, and two segmentation press the design, when pressing first section, discharge air or liquid, when continuing to press the second section hard, discharge the capillary straw, dismantle rapidly, the security is high.

Description

Micro-sampler

Technical Field

The invention relates to the field of medical instruments, in particular to a micro sampler.

Background

In the process of testing in hospitals, a sampler is an indispensable testing tool, and especially with the wide use of automatic analyzers in the current testing field, micro-sampling has become a key to the accuracy of testing results. The sampler in the prior art has a simple structure, namely a rubber air bag is directly sleeved on a glass or plastic dropper main body, the downward end of the dropper is gradually reduced to form a suction nozzle, when the sampler is used, the rubber air bag is firstly pinched by hands, partial air is discharged, and then the liquid to be detected is sucked into the dropper main body by the suction nozzle.

For example, chinese utility model patent of publication No. CN205941073U is a disposable quantitative blood sampling pipette, including plastic dropper and glass capillary, the plastic dropper includes integrative injection moulding's plastics gasbag and plastics body, the inside intercommunication of plastics gasbag and plastics body, the inside air vent of intercommunication plastics gasbag has been arranged on the plastics gasbag, the lower extreme at the plastics body is installed to the glass capillary. The plastic dropper is formed by integrally injection-molding the plastic air bag and the plastic pipe, so that the structure is simplified, the production is convenient, the cost is low, the use is convenient, quantitative sampling is realized by adopting the glass capillary tube, the accuracy is high, and the inspection error is effectively reduced.

However, such a sampling operation process is slow, is not suitable for a large amount of routine work, and has poor precision, a sampler is not easy to clamp in the sampling process, and liquid in a bottle or a container is often not completely sucked, thereby affecting the quality of a detection result.

And blood collection pens are also popular in the current market as launching devices of blood collection needles for blood collection, the blood collection needles can be repeatedly used, and the blood collection needles are all disposable. The pen point of the blood sampling pen can be contaminated with blood of a patient in the blood sampling process, so that the propagation of blood diseases is caused, and the blood sampling pen is only limited to be used by a special person. The blood sampling pen has the advantages of large spring, high elasticity, enough puncture force, adjustable puncture depth, reusability and low single blood sampling cost. However, the method needs complex operation flows of screwing the pen head, installing the blood taking needle before launching, taking the blood taking needle protective cap, pulling the tail cap to activate the launching spring, unscrewing the pen head after launching, abandoning the blood taking needle after launching, screwing the pen head again and the like, and particularly, an operator can be accidentally injured due to the exposure of the needle head in the process of installing and abandoning the blood taking needle, so that the safety performance is poor, and the operation is complicated.

In summary, the technical problems to be solved by the present invention are:

1. the sampler is not easy to clamp.

2. The sampling is slow, and the precision is poor.

3. The existing blood taking needle is too complicated in a blood taking pen mounting mode.

4. The existing blood taking needle has the disadvantages of complicated dismounting and blood taking pen mode, easy accidental injury to operators and low safety.

Disclosure of Invention

The invention aims to provide a blood sampling device which is easy to clamp, high in precision and convenient and quick to operate.

In order to achieve the above object, the present invention is realized by the following technical solutions:

the utility model provides a micro sampler, includes blood sampling device casing, two segmentation pressing means, capillary straw, the blood sampling device casing includes pen-holder, cap, nib cover down, two segmentation pressing means include big spring, little spring, piston, nylon gasket, sealing washer, thimble, rubber circle, a plunger structure is constituteed to pen-holder, sealing washer, piston down, capillary straw gets into the blood sampling device casing along the axial and extrudees rather than droing with pen-holder, rubber cover down each other, the thimble extrusion is on the piston, just to the position of capillary straw.

Furthermore, the upper pen holder and the lower pen holder are provided with stepped buckling positions, and the upper pen holder and the lower pen holder are connected through the stepped buckling positions, so that the whole pen is similar to a pen in shape and is convenient to hold.

Furthermore, the pen point sleeve and the pen holder are connected through a male buckle and a female buckle.

Furthermore, an upper exhaust hole and a flange are arranged on the pen cap.

Further, the pen cap and the piston are connected through a male buckle and a female buckle.

Furthermore, the large spring and the nylon gasket are sleeved on the piston, the large spring and the small spring have different elastic forces, two sections of different forces can be obviously sensed when the pen cap is pressed, the first section of the piston is pressed down to discharge air in the first section of the piston, the second section of the piston continues to move downwards along the axial direction, the capillary suction tube is ejected out by the ejector pin, the assembly and disassembly are rapid, and the safety is high.

Furthermore, a boss is arranged on the piston to limit the positions of the large spring and the nylon gasket.

Further, the seal ring is clamped on the piston.

Further, a lower exhaust hole and an annular bone position are arranged in the lower penholder, and the annular bone position is propped against the nylon gasket.

Furthermore, the capillary suction pipe is provided with scale marks, so that the liquid suction amount can be conveniently controlled.

Through the technical scheme, the invention has the following beneficial effects:

1. the shell of the sampling device is similar to a pen in shape and is easy to clamp;

2. the test liquid is sucked by the capillary suction tube, the sampling speed is high, the taking precision is high, and the quantification is accurate;

3. after the capillary suction pipe is inserted from the pen point sleeve, the capillary suction pipe is mutually extruded with the lower pen holder and the rubber sleeve without falling off, and the installation is convenient and quick;

4. two segmentation press the design, when pressing first section, with air or liquid discharge, when continuing to press the second section hard, discharge the capillary straw, dismantle rapidly, the security is high.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic structural diagram of a pen cap according to the present invention;

FIG. 4 is a schematic view of the piston structure of the present invention;

FIG. 5 is a schematic view of the lower pen holder structure of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

In the most preferred embodiment of the invention, a micro sampler is provided, which comprises a blood sampling device shell 1, a two-stage pressing mechanism 2 and a capillary pipette 3, wherein the blood sampling device shell 1 comprises an upper pen holder 11, a lower pen holder 12, a pen cap 13 and a pen tip sleeve 14, the two-stage pressing mechanism 2 comprises a large spring 21, a small spring 22, a piston 23, a nylon gasket 24, a sealing ring 25, a thimble 26 and a rubber sleeve 27, the lower pen holder 12, the sealing ring 25 and the piston 23 form a plunger structure, the capillary pipette 3 axially enters the blood sampling device shell 1 and is mutually extruded with the lower pen holder 12 and the rubber sleeve 27 without falling off, and the thimble 26 is extruded on the piston 23 and is opposite to the position of the capillary pipette 3. The upper penholder 11 and the lower penholder 12 are connected through a stepped buckling position. The pen point sleeve 14 and the lower pen holder 12 are connected through a male and female buckle. The cap 13 is provided with an upper vent hole 131 and a flange 132, and the cap 13 and the piston 23 are connected through a male and female buckle. The large spring 21 and the nylon washer 24 are sleeved on the piston 23. The piston 23 is provided with a boss 231 for limiting the positions of the large spring 21 and the nylon washer 24. The sealing ring 25 is clamped on the piston 23. The lower penholder 12 is internally provided with a lower vent hole 121 and an annular bone position 122, and the annular bone position 122 is propped against the nylon gasket 24.

The working principle of the embodiment is as follows:

the blood sampling device shell 1 comprises an upper pen holder 11, a lower pen holder 12, a pen cap 13 and a pen point sleeve 14, the shape of the shell is similar to that of a pen, the using method is similar to that of the pen, the lower pen holder 12, a sealing ring 25 and a piston 23 form a plunger structure, when entering the device along the axial direction, a capillary suction tube 3 can be mutually extruded with the lower pen holder 12 and a rubber sleeve 27 to be clamped inside the device, the two-section pressing mechanism 2 realizes the touch of pressing two ends through a large spring 21 and a small spring 22 with different elastic forces, when the first section is pressed, the small spring 22 is compressed, air or liquid in the capillary suction tube 3 is discharged, when the second section is pressed, the large spring 21 and the small spring 22 are simultaneously compressed, and the ejector pin 26 ejects the capillary suction tube 3.

The specific working mode of this embodiment is as follows:

the capillary suction tube 3 is inserted into the pen point sleeve 14, the capillary suction tube 3, the lower pen holder 12 and the rubber sleeve 27 are mutually extruded without falling off, and the installation of the capillary suction tube 3 is completed.

The cap 13 is pressed slightly, the small spring 22 is compressed, and the piston 23 moves axially downward to discharge air.

The capillary suction tube 3 is close to the blood, the pen cap 13 is loosened, the small spring 22 is reset, the piston 23 moves upwards along the axial direction, and the blood is sucked into the capillary suction tube 3.

When the blood needs to be discharged, the cap 13 is lightly pressed again, and the blood in the capillary suction tube 3 is squeezed and discharged by the piston 23.

When the capillary suction tube 3 needs to be detached, a little more force is applied to press the cap 13, the small spring 22 and the large spring 21 are compressed, and the piston 23 continuously moves downwards along the axial direction until the thimble 26 contacts the upper part of the capillary suction tube 3 and finally ejects the capillary suction tube 3.

In the second embodiment, on the basis of the first embodiment, the scale marks are arranged on the capillary pipette 3, so that the amount of the blood sucked can be conveniently controlled.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A micro sampler, characterized in that: it comprises a blood collection device housing (1), a two-stage pressing mechanism (2), a capillary pipette (3), and the blood collection device housing (1) comprises an upper pen holder (11). ), lower pen barrel (12), pen cap (13), pen tip cover (14), the two-stage pressing mechanism (2) includes a large spring (21), a small spring (22), a piston (23), a nylon gasket (24), a sealing ring (25), a thimble (26), a rubber sleeve (27), the lower pen rod (12), the sealing ring (25), and the piston (23) form a plunger structure, and the capillary straw ( 3) Enter the blood collection device housing (1) in the axial direction and squeeze with the lower pen (12) and the rubber sleeve (27) without falling off. The thimble (26) is squeezed on the piston (23), facing the Position of the capillary pipette (3). 2 . The micro sampler according to claim 1 , wherein the upper pen holder ( 11 ) and the lower pen holder ( 12 ) are connected through a stepped buckle. 3 . 3 . The micro sampler according to claim 1 , wherein the pen tip cover ( 14 ) and the lower pen rod ( 12 ) are connected by a male and female buckle. 4 . 4 . The micro sampler according to claim 1 , wherein the cap ( 13 ) is provided with an upper exhaust hole ( 131 ) and a flange ( 132 ). 5 . 5 . The micro sampler according to claim 1 , wherein the cap ( 13 ) and the piston ( 23 ) are connected by male and female buttons. 6 . 6 . The micro sampler according to claim 1 , wherein the large spring ( 21 ) and the nylon gasket ( 24 ) are sleeved on the piston ( 23 ). 7 . 7 . The micro sampler according to claim 1 , wherein a boss ( 231 ) is provided on the piston ( 23 ). 8 . 8 . The micro sampler according to claim 7 , wherein the boss ( 231 ) restricts the positions of the large spring ( 21 ) and the nylon washer ( 24 ). 9 . 9 . The micro sampler according to claim 1 , wherein the sealing ring ( 25 ) is stuck on the piston ( 23 ). 10 . 10. A micro sampler according to claim 1, characterized in that: the lower pen holder (12) is provided with a lower air vent (121) and an annular bone position (122), and the annular bone Position (122) against nylon spacer (24).

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