Disposable blood sampling transfer device

Abstract

The invention relates to the technical field of medical instruments, and discloses a disposable blood sampling transfer device which comprises a puncture needle body and a blood sampling test tube, the puncture needle body comprises a vein puncture needle and a connecting hose, a rubber sealing seat and a sealing cover are installed at the top of the blood sampling test tube in a matched mode, and the vein puncture needle is fixedly installed on a needle seat; one end of the needle base is fixedly connected with one end of the connecting hose, the puncture needle protection cap is sleeved with the end, away from the connecting hose, of the needle base, the connecting base is arranged at the end, away from the vein puncture needle, of the connecting hose and arranged between the connecting hose and the blood sampling test tube, and the blood transfer base is arranged between the connecting base and the blood sampling test tube. And a fixed seat is arranged between the blood sampling test tube and the blood transfer seat. Through the arrangement of the blood transfer seat and the fixing seat, during blood transfer, two test tubes are in butt joint directly through the blood transfer seat and the fixing seat, so that blood transfer can be achieved, and the situation that blood is wasted due to the fact that blood remains in a connecting hose during blood transfer is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a disposable blood sampling transfer device. Background Art

[0002] In medical tests and experiments, blood collection transfer devices are mainly used to collect and transfer blood samples. Blood collection transfer devices are generally disposable to avoid cross infection and ensure the purity of the samples and the accuracy of the test results.

[0003] However, in the prior art, when using a disposable blood collection transfer device, it is necessary to first insert the blood collection puncture needle into the patient's vein, and then insert the other end of the test tube puncture needle into the vacuum blood collection test tube, and use negative pressure to draw the patient's blood and store it in the blood collection test tube. The operation is cumbersome, and the middle part of the blood collection transfer device is generally connected by a hose. Therefore, when collecting blood, some blood may remain in the hose and the needle tube, resulting in blood waste. Summary of the invention

[0004] The purpose of the present invention is to provide a disposable blood collection transfer device to solve the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is an ultrasonic welding device for a syringe filter needle seat, comprising a puncture needle body and a blood collection tube, wherein the puncture needle body comprises a venous puncture needle and a connecting hose, a rubber sealing seat and a sealing cover are mounted on the top of the blood collection tube, the venous puncture needle is fixedly mounted on the needle seat, one end of the needle seat is fixedly connected to one end of the connecting hose, and the end of the needle seat away from the connecting hose is sleeved with a puncture needle protective cap, and further comprising:

[0007] A connecting seat is provided at one end of the connecting hose away from the venous puncture needle;

[0008] The connecting seat is arranged between the connecting hose and the blood sampling tube;

[0009] A blood transfer seat is provided between the connecting seat and the blood collection tube;

[0010] A fixing seat is arranged between the blood collection tube and the blood transfer seat.

[0011] Furthermore, one end of the connecting seat is fixedly connected to a connecting part, and the connecting seat is fixedly connected to the connecting hose through the connecting part. A connecting port is provided at one end of the connecting seat away from the connecting part, and a cylindrical cavity is provided in the middle of the connecting seat. The connecting part is connected to the connecting part through the cylindrical cavity, and a first circular plate and a second circular plate are slidably arranged inside the cylindrical cavity.

[0012] Furthermore, the first circular plate is located on one side of the cylindrical cavity close to the connecting part, a connecting column is fixedly connected to the central axis of the first circular plate, and a trapezoidal seat is fixedly connected to the end of the connecting column away from the first circular plate, a plurality of through holes are evenly opened on the first circular plate around the connecting column, a circular groove is opened in the middle of the second circular plate, the connecting column is slidably set in the circular groove, the diameter of the connecting column is smaller than the diameter of the circular groove, a trapezoidal groove is opened in the middle of the side of the second circular plate away from the first circular plate, the inclination angle of the side wall of the trapezoidal groove is the same as the inclination angle of the inclined surface of the trapezoidal seat, an annular matching groove is opened on the side of the second circular plate away from the first circular plate, and a spring 1 is arranged between the first circular plate and the second circular plate.

[0013] Furthermore, a connecting thread is provided at one end of the blood transfer seat, an opening is provided at the end of the blood transfer seat away from the connecting thread, a cylindrical cavity is provided inside the blood transfer seat, a connector 1 is provided on the side of the blood transfer seat close to the connecting seat, the connector 1 is slidably arranged inside the opening, one end of the connector 1 is fixedly connected to a clamping ring, the clamping ring is slidably arranged inside the cylindrical cavity, a plug 1 is fixedly connected to the end of the connector 1 away from the blood transfer seat, the connector 1 is plugged into the connecting port through the plug 1, a matching seat 1 is fixedly connected to the side wall of the end of the plug 1 close to the connector 1, an annular deep groove is provided at the end of the connector 1 away from the plug 1, a spring 2 is provided between the bottom inner wall of the deep groove and the inner wall of the cylindrical cavity away from the connector 1, and a cylindrical hole is provided at the center axis of the connector 1.

[0014] Furthermore, one end of the blood transfer seat away from the connector one is fixedly connected to the connector two, and the side wall of the connector two close to the blood transfer seat is fixedly connected to the matching seat two, and a plurality of air inlet channels are evenly opened inside the connector two, and the plurality of air inlet channels are distributed in a circular array around the axis of the connector two, and a mounting hole is commonly opened at the center axis of the blood transfer seat and the connector two.

[0015] Furthermore, an annular air inlet groove is provided inside one end of the blood transfer seat near the connector 2, the inner cavity of the air inlet groove is connected to the outside through a plurality of air inlet channels, a slot is provided on the side wall of the air inlet groove that passes through the side wall of the blood transfer seat, and a filter assembly is fixedly installed inside the slot.

[0016] Furthermore, a bevel is provided on the ends of connector 1 and connector 2 that are away from each other, and the size of the bevel matches the caliber of the matching groove. A needle tube protective cap is provided on the side of connector 2 away from the blood transfer seat, and the end of the needle tube protective cap close to the blood transfer seat is sleeved on matching seat 2.

[0017] Furthermore, a needle tube is fixedly installed inside the installation hole, and both ends of the needle tube are fixedly connected to puncture heads, and a plurality of circular holes are opened on the side wall of the puncture head.

[0018] Furthermore, a threaded tube is fixedly connected to the middle part of one end of the fixing seat close to the blood transfer seat, and the fixing seat is threadably installed on the connecting thread through the threaded tube. The inner diameter of the fixing seat is the same as the outer diameter of the cover, and a limiting groove is provided on the inner wall of the fixing seat. A pressure ring is slidably provided inside the fixing seat, and the limiting seat is symmetrically fixedly connected to the side wall of the pressure ring. The limiting seat is slidably provided inside the limiting groove, and a spring three is provided between the pressure ring and the bottom inner wall of the fixing seat.

[0019] The present invention has the following beneficial effects:

[0020] (1) The present invention provides a blood transfer seat and a fixing seat, and utilizes the fixing seat to be sleeved on the cover to limit and fix the blood transfer seat and the fixing seat. When blood is transferred, two test tubes can be directly connected through the blood transfer seat and the fixing seat to achieve blood transfer, thereby avoiding the situation in the prior art that blood will remain inside the connecting hose during blood transfer, resulting in blood waste.

[0021] (2) After the blood sampling is completed in the present invention, the connector 1 can be directly pulled out from the inside of the connecting port. The second circular plate is reset due to the rebound of the spring 1, so that the trapezoidal seat re-closes the trapezoidal groove to prevent the blood from continuing to flow out. Compared with the traditional technology, in the transmission technology, a hemostatic clamp is generally used to clamp the connecting hose to prevent blood from overflowing. However, through the setting of the second circular plate, when the connector 1 is pulled out, the connecting hose can be directly closed, which is convenient to operate.

[0022] (3) After the blood is collected by the present invention, if the patient needs an infusion later, the infusion tube connector can be directly inserted into the connection port to open the trapezoidal groove for infusion, thereby avoiding the need to re-insert the patient and alleviating the patient's pain.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the blood sampling tube of the present invention;

[0028] Figure 4 This is a schematic diagram of the main structure of the puncture needle of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the connecting seat of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the fixing seat of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the blood transfer seat of the present invention;

[0032] Figure 8 It is a schematic diagram of the overall structure of the blood transfer seat of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] In the figure: 1, puncture needle body; 11, intravenous puncture needle; 111, needle seat; 112, puncture needle protective cap; 12, connecting hose; 2, blood collection tube; 21, rubber sealing seat; 22, cover; 3, connecting seat; 301, connecting part; 302, connecting port; 31, cylindrical cavity; 32, first circular plate; 321, connecting column; 322, trapezoidal seat; 323, through hole; 33, second circular plate; 331, circular groove; 332, trapezoidal groove; 333, matching groove; 34, spring 1; 4, blood transfer seat; 401, connecting thread; 402, opening; 403, Cylindrical cavity; 41, connector one; 411, snap ring; 412, plug one; 413, mating seat one; 414, deep groove; 415, spring two; 416, cylindrical hole; 42, connector two; 421, mating seat two; 422, air inlet channel; 423, mounting hole; 43, air inlet groove; 431, notch; 44, filter assembly; 45, inclined surface; 46, needle tube protective cap; 47, needle tube; 471, puncture head; 472, circular hole; 5, fixing seat; 51, threaded barrel; 52, limiting groove; 53, pressure ring; 531, limiting seat; 54, spring three. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] See also Figure 1 - Figure 5As shown, the present invention is a disposable blood sampling transfer device, comprising a puncture needle body 1 and a blood sampling tube 2, the puncture needle body 1 comprising a venous puncture needle 11 and a connecting hose 12, the top of the blood sampling tube 2 is matched with a rubber sealing seat 21 and a cover 22, the venous puncture needle 11 is fixedly mounted on a needle seat 111, one end of the needle seat 111 is fixedly connected to one end of the connecting hose 12, and the end of the needle seat 111 away from the connecting hose 12 is sleeved with a puncture needle protective cap 112, and also includes:

[0038] A connection seat 3 is provided at one end of the connection hose 12 away from the venous puncture needle 11;

[0039] The connecting seat 3 is arranged between the connecting hose 12 and the blood sampling tube 2;

[0040] A blood transfer seat 4 is provided between the connecting seat 3 and the blood collection tube 2;

[0041] A fixing seat 5 is arranged between the blood collection tube 2 and the blood transfer seat 4 .

[0042] One end of the connecting seat 3 is fixedly connected to a connecting part 301, and the connecting seat 3 is fixedly connected to the connecting hose 12 through the connecting part 301. A connecting port 302 is provided at one end of the connecting seat 3 away from the connecting part 301, and a cylindrical cavity 31 is provided in the middle of the connecting seat 3. The connecting part 301 is connected to the connecting part 301 through the cylindrical cavity 31, and a first circular plate 32 and a second circular plate 33 are slidably arranged inside the cylindrical cavity 31.

[0043] The first circular plate 32 is located on one side of the cylindrical cavity 31 near the connecting portion 301, a connecting column 321 is fixedly connected to the central axis of the first circular plate 32, and a trapezoidal seat 322 is fixedly connected to the end of the connecting column 321 away from the first circular plate 32, a plurality of through holes 323 are evenly opened on the first circular plate 32 around the connecting column 321, a circular groove 331 is opened in the middle of the second circular plate 33, the connecting column 321 is slidably set in the circular groove 331, the diameter of the connecting column 321 is smaller than the diameter of the circular groove 331, a trapezoidal groove 332 is opened in the middle of the side of the second circular plate 33 away from the first circular plate 32, the inclination angle of the side wall of the trapezoidal groove 332 is the same as the inclination angle of the inclined surface of the trapezoidal seat 322, an annular matching groove 333 is opened on the side of the second circular plate 33 away from the first circular plate 32, and a spring 34 is arranged between the first circular plate 32 and the second circular plate 33;

[0044] After the blood collection is completed, if the patient needs an infusion later, the infusion tube connector can be directly inserted into the connection port to open the trapezoidal groove for infusion, thus avoiding the need to re-insert the patient and alleviating the patient's pain.

[0045] Example 2

[0046] See also Figure 7 - Figure 8As shown, a connecting thread 401 is provided at one end of the blood transfer seat 4, an opening 402 is provided at the end of the blood transfer seat 4 away from the connecting thread 401, a cylindrical cavity 403 is provided inside the blood transfer seat 4, a connector 41 is provided on the side of the blood transfer seat 4 close to the connecting seat 3, the connector 41 is slidably arranged inside the opening 402, one end of the connector 41 is fixedly connected to a clamp ring 411, the clamp ring 411 is slidably arranged inside the cylindrical cavity 403, and the connector 41 is away from the blood transfer seat 4 is fixedly connected with a plug 412, and the connector 41 is plugged into the connection port 302 through the plug 412. A mating seat 413 is fixedly connected to the side wall of the end of the plug 412 close to the connector 41. An annular deep groove 414 is provided at the end of the connector 41 away from the plug 412. A spring 415 is provided between the bottom inner wall of the deep groove 414 and the inner wall of the side of the cylindrical cavity 403 away from the connector 41. A cylindrical hole 416 is provided at the central axis of the connector 41.

[0047] One end of the blood transfer seat 4 away from the connector one 41 is fixedly connected to the connector two 42, and the side wall of the connector two 42 close to the blood transfer seat 4 is fixedly connected to the matching seat two 421, and a plurality of air inlet channels 422 are evenly opened inside the connector two 42, and the plurality of air inlet channels 422 are distributed in a circular array around the axis of the connector two 42, and a mounting hole 423 is commonly opened at the center axis of the blood transfer seat 4 and the connector two 42.

[0048] An annular air inlet groove 43 is provided inside one end of the blood transfer seat 4 close to the connector 2 42, and the inner cavity of the air inlet groove 43 is connected to the outside through a plurality of air inlet channels 422. A slot 431 is provided on the side wall of the air inlet groove 43 that passes through the side wall of the blood transfer seat 4, and a filter assembly 44 is fixedly installed inside the slot 431.

[0049] A bevel 45 is provided on the ends of connector 1 41 and connector 2 42 that are away from each other, and the size of the bevel 45 matches the caliber of the matching groove 333. A needle tube protective cap 46 is provided on the side of connector 2 42 away from the blood transfer seat 4, and the end of the needle tube protective cap 46 close to the blood transfer seat 4 is sleeved on the matching seat 2 421.

[0050] A needle tube 47 is fixedly installed inside the installation hole 423. Both ends of the needle tube 47 are fixedly connected to puncture heads 471. A plurality of circular holes 472 are opened on the side wall of the puncture head 471.

[0051] When transferring blood, the two test tubes can be directly connected through the blood transfer seat 4 and the fixing seat 5 to achieve blood transfer, thereby avoiding the situation where blood remains inside the connecting hose 12 and causes blood waste.

[0052] Example 3

[0053] See also Figure 6 As shown, a threaded tube 51 is fixedly connected to the middle of one end of the fixing seat 5 close to the blood transfer seat 4, and the fixing seat 5 is threadedly installed on the connecting thread 401 through the threaded tube 51. The inner diameter of the fixing seat 5 is the same as the outer diameter of the cover 22. A limiting groove 52 is provided on the inner wall of the fixing seat 5. A pressure ring 53 is slidably provided inside the fixing seat 5. A limiting seat 531 is symmetrically fixedly connected to the side wall of the pressure ring 53. The limiting seat 531 is slidably provided inside the limiting groove 52. A spring 54 is provided between the pressure ring 53 and the bottom inner wall of the fixing seat 5.

[0054] When the blood transfer is completed, the blood collection tube 2 is released, and the spring 3 54 rebounds to push the blood collection tube 2 away from the fixing seat 5, so that the start and stop of the blood transfer can be controlled at any time, which is convenient for controlling the amount of blood transferred.

[0055] When in use, remove the puncture needle protective cap 112 and the needle tube 47, and insert one end of the needle tube 47 through the rubber sealing seat 21 into the blood collection tube 2, then pierce the venous puncture needle 11 into the patient's vein, and then push the end of the connector 41 toward the inside of the connection port 302 to press the second circular plate 33, so that the trapezoidal seat 322 is separated from the inside of the trapezoidal groove 332, so that the connecting hose 12 is connected to the blood transfer seat 4, and then the patient's blood can be sucked into the blood collection tube 2 by negative pressure;

[0056] Among them, by setting the matching groove 333, the end of the connector 41 can be protected to prevent it from curling;

[0057] After the blood sampling is completed, the connector 41 can be directly pulled out from the connection port 302. The second circular plate 33 is reset due to the rebound of the spring 34, so that the trapezoidal seat 322 re-closes the trapezoidal groove 332 to prevent the blood from continuing to flow out. Compared with the traditional technology, in the transmission technology, a hemostatic clamp is generally used to clamp the connecting hose 12 to prevent blood from overflowing. However, by setting the second circular plate 33, when the connector 41 is pulled out, the connecting hose 12 can be directly closed, which is convenient to operate.

[0058] Furthermore, if the patient needs an infusion later, the infusion tube connector can be directly inserted into the connection port 302 to open the trapezoidal groove 332 for infusion, thus avoiding the need to re-insert the needle into the patient and alleviating the patient's pain.

[0059] After the blood collection is completed, the blood transfer seat 4 and the fixing seat 5 are fixed on the top of the blood collection tube 2 as a whole, and then the needle tube protective cap 46 removed from the matching seat 2 421 can be sleeved on the matching seat 1 413 to prevent air from entering the blood collection tube 2;

[0060] When it is necessary to transfer blood for inspection, remove the needle tube protective cap 46, insert the connector 1 41 directly into another test tube, then invert the test tube containing blood and press downward. During the process, the cover 22 squeezes the pressure ring 53, the spring three 54 is compressed, and then the connector two 42 fills the blood collection tube 2. At this time, air passes through the filter assembly 44, and after being filtered, it enters the top blood collection tube 2 through the air inlet groove 43 and the air inlet channel 422. The blood can be extracted by using the negative pressure in the bottom test tube. When the blood transfer is completed, loosen the blood collection tube 2, the spring three 54 rebounds to push the pressure ring 53 to move, and then push the blood collection tube 2 to separate from the fixing seat 5, and the connector two 42 will be extracted from the blood collection tube 2. When in use, the test tube is held by both hands, which has high stability, and the start and stop of blood transfer can be controlled at any time, which is convenient for controlling the amount of transferred blood, avoiding the situation in the prior art that when blood is transferred, there will be blood remaining in the connecting hose 12, causing blood waste.

[0061] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A disposable blood sampling transfer device, comprising a puncture needle body (1) and a blood sampling tube (2), wherein the puncture needle body (1) comprises a venous puncture needle (11) and a connecting hose (12), the top of the blood sampling tube (2) is cooperatively mounted with a rubber sealing seat (21) and a sealing cover (22), the venous puncture needle (11) is fixedly mounted on a needle seat (111), one end of the needle seat (111) is fixedly connected to one end of the connecting hose (12), and the end of the needle seat (111) away from the connecting hose (12) is sleeved with a puncture needle protective cap (112), It is characterized in that Also includes: A connecting seat (3) is provided at one end of the connecting hose (12) away from the venous puncture needle (11); The connecting seat (3) is arranged between the connecting hose (12) and the blood sampling tube (2); A blood transfer seat (4) is provided between the connecting seat (3) and the blood collection tube (2); A fixing seat (5) is arranged between the blood collection tube (2) and the blood transfer seat (4).

2. A disposable blood sampling transfer device according to claim 1, Features: One end of the connection seat (3) is fixedly connected to a connection portion (301), and the connection seat (3) is fixedly connected to a connection hose (12) via the connection portion (301). An end of the connection seat (3) away from the connection portion (301) is provided with a connection port (302), and a cylindrical cavity (31) is provided in the middle of the connection seat (3), and the connection portion (301) is communicated with the connection portion (301) via the cylindrical cavity (31), and a first circular plate (32) and a second circular plate (33) are slidably arranged inside the cylindrical cavity (31).

3. A disposable blood sampling transfer device according to claim 2, Features: The first circular plate (32) is located on one side of the cylindrical cavity (31) near the connecting portion (301); a connecting column (321) is fixedly connected to the central axis of the first circular plate (32); an end of the connecting column (321) away from the first circular plate (32) is fixedly connected to a trapezoidal seat (322); a plurality of through holes (323) are evenly formed on the first circular plate (32) around the connecting column (321); a circular groove (331) is formed in the middle of the second circular plate (33); the connecting column (321) is slidably arranged on the circular plate (32) and the connecting column (321) is slidably arranged on the circular plate (32) and the connecting column (321) is fixedly connected to the connecting column (321) at one end thereof. Inside the groove (331), the diameter of the connecting column (321) is smaller than the diameter of the circular groove (331); a trapezoidal groove (332) is provided in the middle of a side of the second circular plate (33) away from the first circular plate (32); the inclination angle of the side wall of the trapezoidal groove (332) is the same as the inclination angle of the inclined surface of the trapezoidal seat (322); an annular matching groove (333) is provided on a side of the second circular plate (33) away from the first circular plate (32); and a spring 1 (34) is provided between the first circular plate (32) and the second circular plate (33).

4. A disposable blood sampling transfer device according to claim 1, Features: One end of the blood transfer seat (4) is provided with a connecting thread (401), and one end of the blood transfer seat (4) away from the connecting thread (401) is provided with an opening (402). A cylindrical cavity (403) is provided inside the blood transfer seat (4). A connector (41) is provided on a side of the blood transfer seat (4) close to the connecting seat (3). The connector (41) is slidably arranged inside the opening (402). One end of the connector (41) is fixedly connected with a snap ring (411). The snap ring (411) is slidably arranged inside the cylindrical cavity (403). The connector (41) is away from the blood transfer seat (3). One end of the shift seat (4) is fixedly connected to a plug 1 (412), the connector 1 (41) is plugged into the connection port (302) through the plug 1 (412), a mating seat 1 (413) is fixedly connected to the side wall of the end of the plug 1 (412) close to the connector 1 (41), an annular deep groove (414) is provided at the end of the connector 1 (41) away from the plug 1 (412), a spring 2 (415) is provided between the bottom inner wall of the deep groove (414) and the inner wall of the cylindrical cavity (403) away from the connector 1 (41), and a cylindrical hole (416) is provided at the central axis of the connector 1 (41).

5. A disposable blood sampling transfer device according to claim 1, Features: The end of the blood transfer seat (4) away from the connector one (41) is fixedly connected to the connector two (42), and the side wall of the connector two (42) close to the blood transfer seat (4) is fixedly connected to the matching seat two (421), and the interior of the connector two (42) is evenly provided with a plurality of air inlet channels (422), and the plurality of air inlet channels (422) are distributed in a circular array around the axis of the connector two (42), and the central axis of the blood transfer seat (4) and the connector two (42) is jointly provided with a mounting hole (423).

6. A disposable blood sampling transfer device according to claim 5, Features: An annular air inlet groove (43) is provided inside one end of the blood transfer seat (4) close to the second connector (42); the inner cavity of the air inlet groove (43) is connected to the outside through a plurality of air inlet channels (422); a notch (431) is provided on the side wall of the air inlet groove (43) and passes through the side wall of the blood transfer seat (4); a filter assembly (44) is fixedly installed inside the notch (431).

7. A disposable blood sampling transfer device according to claim 4, Features: The ends of the connector 1 (41) and the connector 2 (42) that are away from each other are both provided with an inclined surface (45), the size of which matches the caliber of the matching groove (333), and the side of the connector 2 (42) away from the blood transfer seat (4) is provided with a needle tube protective cap (46), and the end of the needle tube protective cap (46) close to the blood transfer seat (4) is sleeved on the matching seat 2 (421).

8. A disposable blood sampling transfer device according to claim 5, Features: A needle tube (47) is fixedly installed inside the installation hole (423), and both ends of the needle tube (47) are fixedly connected to puncture heads (471), and a plurality of circular holes (472) are opened on the side wall of the puncture head (471).

9. A disposable blood sampling transfer device according to claim 1, Features: A threaded tube (51) is fixedly connected to the middle of one end of the fixing seat (5) close to the blood transfer seat (4), and the fixing seat (5) is threadedly mounted on the connecting thread (401) through the threaded tube (51). The inner diameter of the fixing seat (5) is the same as the outer diameter of the sealing cover (22). A limiting groove (52) is provided on the inner wall of the fixing seat (5), and a pressure ring (53) is slidably arranged inside the fixing seat (5). A limiting seat (531) is symmetrically fixedly connected to the side wall of the pressure ring (53), and the limiting seat (531) is slidably arranged inside the limiting groove (52). A spring three (54) is arranged between the pressure ring (53) and the bottom inner wall of the fixing seat (5).

Images