A disposable blood collection transfer device

Abstract

The application relates to the technical field of medical devices, and discloses a one-time blood sampling transfer device, which comprises a puncture needle body and a blood sampling test tube, the puncture needle body comprises a venous puncture needle and a connecting hose, a rubber sealing seat and a cover are cooperatively arranged on the top of the blood sampling test tube, the venous puncture needle is fixedly arranged on a needle seat, one end of the needle seat is fixedly connected with one end of the connecting hose, a puncture needle protection cap is sleeved with the end of the needle seat away from the connecting hose, a connecting seat is arranged at the end of the connecting hose away from the venous puncture needle, the connecting seat is arranged between the connecting hose and the blood sampling test tube, a blood transfer seat is arranged between the connecting seat and the blood sampling test tube, and a fixing 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, when blood is transferred, the two test tubes can be directly docked through the blood transfer seat and the fixing seat to realize blood transfer, and the situation that blood is wasted due to the fact that blood is left in the connecting hose during blood transfer is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a disposable blood sampling transfer device. BACKGROUND

[0002] In medical detection and experiments, the blood sampling transfer device is mainly used for collecting and transferring blood samples. The blood sampling transfer device is generally disposable to avoid cross infection and ensure the purity of the sample and the accuracy of the detection result.

[0003] However, in the prior art, when using the disposable blood sampling transfer device, the blood sampling puncture needle needs to be first inserted into the patient's internal vein, and then the other end of the test tube puncture needle is inserted into the internal vacuum blood sampling test tube, and the patient's blood is extracted by negative pressure and stored in the blood sampling test tube. The operation is complicated, and the middle part of the blood sampling transfer device is generally connected by a hose, so that part of the blood may be left in the hose and needle tube during blood sampling, resulting in blood waste. SUMMARY

[0004] The present application aims to provide a disposable blood sampling transfer device to solve the problems in the background art.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] The present application is an ultrasonic welding device for a syringe filter needle seat, comprising a puncture needle body and a blood sampling test tube. The puncture needle body comprises a venous puncture needle and a connecting hose. A rubber sealing seat and a cover are installed at the top of the blood sampling test tube. The venous puncture needle is fixedly installed on the needle seat. One end of the needle seat is fixedly connected with one end of the connecting hose. A puncture needle protective cap is sleeved on the end of the needle seat away from the connecting hose. The device further comprises:

[0007] One end of the connecting hose away from the venous puncture needle is provided with a connecting seat;

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

[0009] A blood transfer seat is arranged between the connecting seat and the blood sampling test tube;

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

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

[0012] Further, the first circular plate is located inside the cylindrical cavity and close to one side of the connecting part, a connecting column is fixedly connected to the central axis of the first circular plate, a trapezoidal seat is fixedly connected to one end of the connecting column away from the first circular plate, a plurality of through holes are evenly arranged on the first circular plate around the connecting column, a circular groove is arranged in the middle of the second circular plate, the connecting column is slidingly arranged in the circular groove, the diameter of the connecting column is smaller than that of the circular groove, a trapezoidal groove is arranged in the middle of one 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 that of the inclined surface of the trapezoidal seat, a ring-shaped matching groove is arranged on one side of the second circular plate away from the first circular plate, and a spring one is arranged between the first circular plate and the second circular plate.

[0013] Further, one end of the blood transfer seat is provided with a connecting thread, an opening is arranged at the end of the blood transfer seat away from the connecting thread, a cylindrical cavity is arranged in the blood transfer seat, a connecting head one is arranged on one side of the blood transfer seat close to the connecting seat, the connecting head one is slidingly arranged in the opening, a clasp is fixedly connected to one end of the connecting head one, the clasp is slidingly arranged in the cylindrical cavity, a plug one is fixedly connected to one end of the connecting head one away from the blood transfer seat, the connecting head one is inserted into the connecting port through the plug one, a matching seat one is fixedly connected to the end of the plug one close to the connecting head one, an annular deep groove is arranged at one end of the connecting head one away from the plug one, a spring two is arranged between the bottom inner wall of the deep groove and the inner wall of one side of the cylindrical cavity away from the connecting head one, and a cylindrical hole is arranged at the central axis of the connecting head one.

[0014] Further, a connecting head two is fixedly connected to one end of the blood transfer seat away from the connecting head one, a matching seat two is fixedly connected to the end of the connecting head two close to the blood transfer seat, a plurality of air inlet channels are evenly arranged in the connecting head two, the plurality of air inlet channels are distributed in a circumferential array around the central axis of the connecting head two, and a mounting hole is arranged at the central axis of the blood transfer seat and the connecting head two.

[0015] Further, an annular air inlet groove is arranged in the end of the blood transfer seat close to the connecting head two, the inner cavity of the air inlet groove is communicated with the outside through the plurality of air inlet channels, a slot is arranged in the side wall of the blood transfer seat through the side wall of the air inlet groove, and a filter assembly is fixedly installed in the slot.

[0016] Further, the end of the connecting head one and the end of the connecting head two away from each other are provided with an inclined surface, the size of the inclined surface matches the caliber of the matching groove, a needle tube protection cap is arranged on one side of the connecting head two away from the blood transfer seat, and the end of the needle tube protection cap close to the blood transfer seat is sleeved on the matching seat two.

[0017] Further, a needle tube is fixedly installed in the mounting hole, puncture heads are fixedly connected to both ends of the needle tube, and a plurality of circular holes are arranged in the side wall of the puncture head.

[0018] Further, the fixed seat is fixedly connected with a threaded cylinder in the middle of one end close to the blood transfer seat, the fixed seat is installed on the connecting thread through the threaded cylinder, the inner diameter of the fixed seat is same with the outer diameter of the cover, a limiting groove is arranged on the inner wall of the fixed seat, a compression ring is slidably arranged in the fixed seat, limiting seats are fixedly connected on the side wall of the compression ring in a symmetrical manner, the limiting seats are slidably arranged in the limiting groove, and springs are arranged between the compression ring and the bottom inner wall of the fixed seat.

[0019] The present application has the following advantages:

[0020] (1) The blood transfer seat and the fixed seat are arranged, the fixed seat is sleeved on the cover, the blood transfer seat and the fixed seat are limited and fixed, when blood is transferred, the two test tubes are docked through the blood transfer seat and the fixed seat, and the blood transfer is realized, and the blood waste caused by the residual blood in the connecting hose in the prior art is avoided.

[0021] (2) After blood sampling is completed, the connecting head one can be directly pulled out from the connecting port, the second circular plate is reset due to the rebound of the spring one, the trapezoidal seat is closed to the trapezoidal groove again, blood continues to flow out is prevented, compared with the traditional technology, the blood clip is generally used to clamp the connecting hose to prevent blood from overflowing, and when the connecting head one is pulled out, the connecting hose can be directly closed through the arrangement of the second circular plate, and the operation is convenient.

[0022] (3) After blood sampling is completed, if the patient needs to be transfused subsequently, the transfusion pipe connector can be directly inserted into the connecting port, the trapezoidal groove is opened, and transfusion is performed, so that the patient does not need to be pricked again, and the pain of the patient is reduced.

[0023] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

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

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

[0027] Figure 3 It is a schematic diagram of the blood sampling test tube structure of the present application;

[0028] Figure 4 Figure 1 is a schematic diagram of the main body structure of the puncture needle of the present application;

[0029] Figure 5 Figure 2 is a schematic diagram of the connecting seat structure of the present application;

[0030] Figure 6 Figure 3 is a schematic diagram of the fixed seat structure of the present application;

[0031] Figure 7 Figure 4 is a schematic diagram of the blood transfer seat structure of the present application;

[0032] Figure 8 Figure 5 is a schematic diagram of the overall structure of the blood transfer seat of the present application.

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

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

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] Embodiment 1

[0037] Please refer to Figure 1 - Figure 5As shown, the present application is a one-time use blood sampling transfer device, comprising a puncture needle body 1 and a blood sampling test tube 2, the puncture needle body 1 comprises a venous puncture needle 11 and a connecting hose 12, a rubber sealing seat 21 and a cover 22 are fitted and installed on the top of the blood sampling test tube 2, the venous puncture needle 11 is fixedly installed on a needle seat 111, one end of the needle seat 111 is fixedly connected with one end of the connecting hose 12, a puncture needle protective cap 112 is sleeved on the end of the needle seat 111 away from the connecting hose 12, further comprising:

[0038] One end of the connecting hose 12 away from the venous puncture needle 11 is provided with a connecting seat 3;

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

[0040] A blood transfer seat 4 is arranged between the connecting seat 3 and the blood sampling test tube 2;

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

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

[0043] The first circular plate 32 is located on one side of the cylindrical cavity 31 close to the connecting part 301, a connecting column 321 is fixedly connected to the central axis of the first circular plate 32, one end of the connecting column 321 away from the first circular plate 32 is fixedly connected with a trapezoidal seat 322, a plurality of through holes 323 are uniformly formed around the connecting column 321 on the first circular plate 32, a circular groove 331 is formed in the middle part of the second circular plate 33, the connecting column 321 is slidably arranged 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 formed in the middle part of one 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, a ring-shaped matching groove 333 is formed on one 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 blood sampling is completed, if the patient needs subsequent infusion, the infusion pipe connector can be directly inserted into the connecting port, so that the trapezoidal groove is opened, and infusion is performed, thereby avoiding the need to re-prick the patient and reducing the pain of the patient.

[0045] Example 2

[0046] Please refer to Figure 7 - Figure 8As shown, one end of the blood transfer seat 4 is provided with a connecting thread 401, the end of the blood transfer seat 4 away from the connecting thread 401 is provided with an opening 402, the inside of the blood transfer seat 4 is provided with a cylindrical cavity 403, one side of the blood transfer seat 4 close to the connecting seat 3 is provided with a connecting head one 41, the connecting head one 41 is slidingly arranged in the opening 402, one end of the connecting head one 41 is fixedly connected with a clasp ring 411, the clasp ring 411 is slidingly arranged in the cylindrical cavity 403, one end of the connecting head one 41 away from the blood transfer seat 4 is fixedly connected with a plug one 412, the connecting head one 41 is inserted into the connecting port 302 through the plug one 412, one end of the plug one 412 close to the connecting head one 41 is fixedly connected with a matching seat one 413, the connecting head one 41 is provided with an annular deep groove 414 at the end away from the plug one 412, a spring two 415 is arranged between the bottom inner wall of the deep groove 414 and the inner wall of one side of the cylindrical cavity 403 away from the connecting head one 41, and a cylindrical hole 416 is arranged at the central axis of the connecting head one 41.

[0047] One end of the blood transfer seat 4 away from the connecting head one 41 is fixedly connected with a connecting head two 42, one end of the connecting head two 42 close to the blood transfer seat 4 is fixedly connected with a matching seat two 421, a plurality of air inlet channels 422 are uniformly arranged in the connecting head two 42, the plurality of air inlet channels 422 are distributed in a circumferential array around the central axis of the connecting head two 42, and the central axis of the blood transfer seat 4 and the connecting head two 42 is provided with a mounting hole 423.

[0048] The inside of one end of the blood transfer seat 4 close to the connecting head two 42 is provided with an annular air inlet groove 43, the inner cavity of the air inlet groove 43 is communicated with the outside through the plurality of air inlet channels 422, a slot 431 is arranged in the side wall of the blood transfer seat 4 and penetrates the side wall, and a filter assembly 44 is fixedly arranged in the inside of the slot 431.

[0049] The end of the connecting head one 41 and the connecting head two 42 away from each other is provided with an inclined surface 45, the size of the inclined surface 45 matches the caliber of the matching groove 333, one side of the connecting head two 42 away from the blood transfer seat 4 is provided with a needle tube protective cap 46, and one end of the needle tube protective cap 46 close to the blood transfer seat 4 is sleeved on the matching seat two 421.

[0050] The inside of the mounting hole 423 is fixedly arranged with a needle tube 47, both ends of the needle tube 47 are fixedly connected with a puncture head 471, a plurality of circular holes 472 are arranged in the side wall of the puncture head 471,

[0051] When the blood is transferred, the two test tubes can be directly connected through the blood transfer seat 4 and the fixed seat 5 to realize the transfer of blood, so as to avoid the situation that the blood is left in the connecting hose 12 and causes the waste of blood.

[0052] Example 3

[0053] Please refer to Figure 6 As shown, the fixed seat 5 is fixedly connected with a threaded cylinder 51 in the middle of one end of the blood transfer seat 4, the fixed seat 5 is screwed on the connecting thread 401 through the threaded cylinder 51, the inner diameter of the fixed seat 5 is the same as the outer diameter of the cover 22, a limiting groove 52 is formed on the inner wall of the fixed seat 5, a compression ring 53 is slidably arranged in the fixed seat 5, a limiting seat 531 is fixedly connected to the side wall of the compression ring 53, the limiting seat 531 is slidably arranged in the limiting groove 52, and a spring three 54 is arranged between the compression ring 53 and the bottom inner wall of the fixed seat 5;

[0054] When the blood transfer is completed, the blood collection tube 2 is loosened, and the spring three 54 rebounds, so that the blood collection tube 2 is separated from the fixed seat 5, the start and stop of blood transfer can be controlled at any time, and the amount of transferred blood can be controlled.

[0055] In use, the puncture needle protection cap 112 and the needle tube 47 are pulled out, one end of the needle tube 47 is inserted into the blood collection tube 2 through the rubber sealing seat 21, then the intravenous puncture needle 11 is inserted into the vein of the patient, then the end of the connecting head one 41 is pushed into the connecting port 302, so that the second circular plate 33 is pressed, the trapezoidal seat 322 is separated from the trapezoidal groove 332, the connecting hose 12 is communicated with the blood transfer seat 4, and then the blood of the patient is sucked into the blood collection tube 2 by using negative pressure;

[0056] The end of the connecting head one 41 is protected by the matching groove 333, so that the edge curling of the end of the connecting head one 41 is prevented.

[0057] After blood collection, the connecting head one 41 can be directly pulled out from the inside of the connecting port 302, the second circular plate 33 is reset due to the rebound of the spring one 34, so that the trapezoidal seat 322 re-closes the trapezoidal groove 332 to prevent blood from continuing to flow out. Compared with the prior art, in the transmission technology, a hemostatic clamp is generally used to clamp the connecting hose 12 to prevent blood from overflowing, and by arranging the second circular plate 33, the connecting hose 12 can be directly closed when the connecting head one 41 is pulled out, so that the operation is convenient.

[0058] In addition, if the patient needs infusion subsequently, the infusion tube connector can be directly inserted into the connecting port 302 to open the trapezoidal groove 332 for infusion, so that the patient does not need to be re-punctured, and the pain of the patient is reduced.

[0059] After blood collection, the blood transfer seat 4 and the fixed seat 5 are fixed on the top of the blood collection tube 2 as a whole, then the needle tube protection cap 46 detached from the matching seat two 421 is sleeved on the matching seat one 413 to prevent air from entering the inside of the blood collection tube 2.

[0060] When the blood needs to be tested and transferred, the needle tube protection cap 46 is pulled off, the connector one 41 is directly inserted into another test tube, then the test tube containing blood is inverted and pressed downward, in the process, the cover 22 extrudes the pressing ring 53, the spring three 54 is compressed, then the connector two 42 enters the inside of the blood collection test tube 2, at this time, the air is filtered by the filter assembly 44, and then enters the inside of the top blood collection test 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, the blood collection test tube 2 can be released, the spring three 54 rebounds to push the pressing ring 53 to move, and then push the blood collection test tube 2 to separate from the fixing seat 5, the connector two 42 is extracted from the inside of the blood collection test tube 2, when used, the test tube is held by both hands, the stability is high, and the start and stop of blood transfer can be controlled at any time, the amount of transferred blood is convenient to control, and the situation that the blood is wasted due to the residual blood in the connecting hose 12 during the blood transfer in the prior art is avoided.

[0061] The preferred embodiments disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments. Obviously, according to the content of the present application, many modifications and changes can be made. The present application is selected and described in detail, in order to better explain the principles and practical application of the present application, so that those skilled in the art can well understand and use the present application. The present application is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A disposable blood sampling and transferring 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), a rubber sealing seat (21) and a cover (22) being fitted and installed at the top of the blood sampling tube (2), the venous puncture needle (11) being fixedly installed on a needle seat (111), one end of the needle seat (111) being fixedly connected with one end of the connecting hose (12), a puncture needle protection cap (112) being sleeved on the end of the needle seat (111) away from the connecting hose (12), characterized in that, Also include: The end of the connecting hose (12) away from the venous puncture needle (11) is provided with a connecting seat (3); The connecting seat (3) is arranged between the connecting hose (12) and the blood collection tube (2); The connecting seat (3) and the blood collection tube (2) are provided with a blood transfer seat (4); The blood collection tube (2) and the blood transfer seat (4) are provided with a fixing seat (5); One end of the connecting seat (3) is fixedly connected with a connecting part (301), the connecting seat (3) is fixedly connected with the connecting hose (12) through the connecting part (301), one end of the connecting seat (3) away from the connecting part (301) is provided with a connecting port (302), the middle part of the connecting seat (3) is provided with a cylindrical cavity (31), the connecting part (301) is communicated with the connecting part (301) through the cylindrical cavity (31), the first circular plate (32) and the second circular plate (33) are slidably arranged in the cylindrical cavity (31); The first circular plate (32) is located on one side of the cylindrical cavity (31) close to the connecting part (301), the connecting column (321) is fixedly connected at the middle shaft of the first circular plate (32), the trapezoidal seat (322) is fixedly connected at one end of the connecting column (321) away from the first circular plate (32), a plurality of through holes (323) are uniformly arranged on the first circular plate (32) around the connecting column (321), the circular groove (331) is arranged in the middle part of the second circular plate (33), the connecting column (321) is slidably arranged in the circular groove (331), the diameter of the connecting column (321) is smaller than the diameter of the circular groove (331), the trapezoidal groove (332) is arranged in the middle part of one 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), the annular matching groove (333) is arranged on one side of the second circular plate (33) away from the first circular plate (32), the spring (34) is arranged between the first circular plate (32) and the second circular plate (33); One end of the blood transfer seat (4) is provided with a connecting thread (401), and the end away from the connecting thread (401) of the blood transfer seat (4) is provided with an opening (402). A cylindrical cavity (403) is arranged in the blood transfer seat (4). A connecting head (41) is arranged on one side of the blood transfer seat (4) close to the connecting seat (3). The connecting head (41) is slidably arranged in the opening (402). One end of the connecting head (41) is fixedly connected with a snap ring (411). The snap ring (411) is slidably arranged in the cylindrical cavity (403). One end of the connecting head (41) away from the blood transfer seat (4) is fixedly connected with a plug (412). The connecting head (41) is inserted into the connecting port (302) through the plug (412). One end of the plug (412) close to the connecting head (41) is fixedly connected with a matching seat (413). An annular deep groove (414) is arranged at one end of the connecting head (41) away from the plug (412). A spring (415) is arranged between the bottom inner wall of the deep groove (414) and the inner wall of one side of the cylindrical cavity (403) away from the connecting head (41). A cylindrical hole (416) is arranged at the central axis of the connecting head (41). One end of the blood transfer seat (4) away from the connecting head (41) is fixedly connected with a connecting head (42). One end of the connecting head (42) close to the blood transfer seat (4) is fixedly connected with a matching seat (421). A plurality of air inlet channels (422) are uniformly arranged in the connecting head (42). The plurality of air inlet channels (422) are arranged in a circumferential array around the central axis of the connecting head (42). An installation hole (423) is arranged at the central axis of the blood transfer seat (4) and the connecting head (42). An annular air inlet groove (43) is arranged in the inner end of the blood transfer seat (4) close to the connecting head (42). The inner cavity of the air inlet groove (43) is communicated with the outside through the plurality of air inlet channels (422). A slot (431) is arranged in the sidewall of the blood transfer seat (4) and penetrates the sidewall. A filter assembly (44) is fixedly arranged in the slot (431). The end away from each other of the connecting head (41) and the connecting head (42) is provided with an inclined surface (45). The size of the inclined surface (45) matches the caliber of the matching groove (333). A needle tube protective cap (46) is arranged on one side of the connecting head (42) away from the blood transfer seat (4). The needle tube protective cap (46) is sleeved on the matching seat (421) close to the blood transfer seat (4). The middle part of one end of the fixing seat (5) is fixedly connected with a threaded cylinder (51), the fixing seat (5) is screwed on the connecting thread (401) through the threaded cylinder (51), the inner diameter of the fixing seat (5) is same with the outer diameter of the cover (22), a limiting groove (52) is arranged on the inner wall of the fixing seat (5), a pressing ring (53) is slidably arranged in the fixing seat (5), limiting seats (531) are symmetrically and fixedly connected to the side wall of the pressing ring (53), the limiting seats (531) are slidably arranged in the limiting groove (52), and springs (54) are arranged between the pressing ring (53) and the bottom inner wall of the fixing seat (5).

2. The disposable blood sampling transfer set according to claim 1, wherein: The inside of the mounting hole (423) is fixedly provided with a needle tube (47), both ends of the needle tube (47) are fixedly connected with puncture heads (471), and a plurality of circular holes (472) are arranged on the side wall of the puncture head (471).

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