Blood identification puncture needle

Abstract

The invention discloses a blood identification puncture needle, and relates to the technical field of blood identification sampling, the blood identification puncture needle comprises a needle tube and a needle head used for assisting blood sampling identification puncture, the front end of the needle tube is fixedly provided with a mounting cylinder, and the end part of the needle head is fixedly provided with a first connecting cylinder used for being in threaded connection with the outer side of the mounting cylinder in a communicating manner; the pressure extraction assembly is arranged on the needle tube and is used for assisting in sampling and pressure extraction. When the blood identification puncture needle is used for blood puncture sampling, through mutual cooperation of the resistance assembly, the limiting assembly, the liquid outlet assembly and other components, resistance with certain elastic force can be generated on pulling of the piston plate, and through the resistance effect, the situation that in the liquid pumping and sampling process, pumping and pulling are too violent is avoided; the hemolysis phenomenon caused by erythrocyte rupture of the blood after liquid extraction and sampling is further avoided, more accurate detection operation after sampling is facilitated, and closing and liquid outlet operation of the blood after sampling can be effectively controlled.

Description

Technical Field

[0001] The invention relates to the technical field of blood identification sampling, in particular to a blood identification puncture needle. Background Art

[0002] A blood identification puncture needle is a medical device used to obtain blood samples from human blood vessels or other tissues for various blood identification and analysis. Its main purpose is to provide accurate blood samples for clinical diagnosis, disease monitoring, health examinations, etc. For example, in the laboratory of a hospital, blood samples collected by a puncture needle can be used for routine blood tests to determine whether the patient has anemia, infection, blood system diseases, etc.; in a blood station, a puncture needle is used to collect blood from blood donors for blood type identification, infectious disease screening, etc., to ensure the safety of blood products.

[0003] In the process of using a blood identification puncture needle for blood sampling and identification, in order to facilitate the rapid insertion of the needle and reduce the pain caused to the user during the needle insertion process, the needle diameter of the puncture needle is set to be smaller. When the operator is unskilled or the operator makes an error during blood collection, the puncture needle may be pulled too hard. Due to the thin diameter of the needle, the shear force on the blood flowing in the needle tube is relatively large under the action of pressure. When the shear force exceeds the limit that red blood cells can withstand, the red blood cells are easily ruptured, resulting in hemolysis. The color of the blood sample after hemolysis will become darker (normal serum or plasma is light yellow, which may turn red after hemolysis), and the substances in the red blood cells (such as hemoglobin, potassium ions, etc.) will be released into the plasma, interfering with the sampling and detection results. For this reason, we propose a blood identification puncture needle. Summary of the invention

[0004] The object of the present invention is to provide a blood identification puncture needle to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a blood identification puncture needle, comprising a needle tube and a needle for assisting blood sampling and identification puncture, the front end of the needle tube is fixed with a mounting cylinder, the end of the needle head is connected and fixed with a first connecting cylinder for threaded connection with the outer side of the mounting cylinder, and also includes a suction and pressure assembly arranged on the needle tube for assisting sampling and pressure extraction, the suction and pressure assembly comprises a piston plate slidably connected to the inside of the needle tube, a pull rod is fixed on the piston plate, one end of the pull rod is located on the outside of the needle tube and is fixed with a mounting plate, a driving pin for assisting in driving the mounting plate is arranged on the mounting plate, a resistance assembly for generating resistance during the pulling and pressing process of the suction and pressure assembly and an adjusting member for adjusting the resistance are arranged on the needle tube, the interior of the mounting cylinder is provided with a limiting assembly for limiting the piston plate after liquid extraction and a liquid discharge assembly for assisting in liquid discharge after liquid extraction.

[0006] Preferably, the resistance assembly includes a mounting ring sleeved on the outside of the needle tube, a sliding assembly for assisting the mounting ring in sliding guidance is arranged between the mounting ring and the needle tube, a plurality of groups of elastic pull ropes are connected between the mounting ring and the mounting plate, and each group of elastic ropes is arranged in a circular array.

[0007] Preferably, the sliding assembly includes a plurality of groups of slide grooves opened on the outside of the needle tube, and each group of slide grooves is arranged in a ring array on the needle tube, and each group of the slide grooves is internally slidably connected with a slider, and each group of the sliders is respectively fixed to the inner side of the mounting ring.

[0008] Preferably, the adjusting member comprises an adjusting ring sleeved on the outside of the needle tube, the adjusting ring and the outside of the needle tube are threadedly engaged with each other, and a rotating assembly for assisting the rotatable connection is provided between the adjusting ring and one side of the mounting ring.

[0009] Preferably, the rotating assembly includes an annular groove opened on one side of the adjusting ring, the annular groove is rotatably connected to an annular plate inside, the annular plate is fixed to one side of the mounting ring, the mounting ring, the adjusting ring, the annular groove and the annular plate are concentrically arranged, and the cross-sections of the annular plate and the annular groove are T-shaped.

[0010] Preferably, the limiting assembly includes an operating cylinder fixed inside the mounting cylinder, the operating cylinder is provided with a through hole, the operating cylinder is provided with a conical groove arranged toward the outside of the mounting cylinder, the through hole is communicated with the conical groove, a sphere is arranged inside the conical groove for resisting and blocking the conical groove, and an elastic component for elastically squeezing the sphere and a guide component for guiding during the squeezing process are arranged inside the mounting cylinder.

[0011] Preferably, the elastic component comprises a circular plate fixed inside the mounting tube, the circular plate is provided with a plurality of circular holes for blood circulation, and a compression spring for squeezing and pushing the sphere is installed between the circular plate and the sphere.

[0012] Preferably, the guide assembly comprises a sleeve fixed on the circular plate, a slide rod is slidably connected to the sleeve, one end of the slide rod is fixed to the sphere, and the extrusion spring is sleeved on the outside of the sleeve.

[0013] Preferably, the liquid outlet component includes a second connecting tube, which is detachably mounted on the outer side of the mounting tube by means of threads, a delivery pipe for liquid delivery is fixed on the second connecting tube, and a pushing component for pushing the ball is arranged inside the second connecting tube.

[0014] Preferably, the pushing assembly includes a mounting frame fixed inside the second connecting tube, and a push rod for squeezing and pushing the ball is fixed on the mounting frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the process of blood puncture sampling using the blood identification puncture needle of the present invention, the mutual cooperation of the resistance component, the limit component and the liquid outlet component can not only generate a resistance with a certain elastic force on the pulling of the piston plate, but also avoid excessive suction, pressure and pulling in the process of liquid sampling through the resistance effect, and further avoid the red blood cell rupture and hemolysis of the blood after liquid sampling, so as to facilitate more accurate detection operations after sampling, and can also effectively control the closing and liquid outlet operations of the blood after sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the needle and the needle tube of the present invention after installation;

[0019] Figure 3 It is a schematic diagram of the structure of the resistance component and the sliding component of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the adjustment ring and the rotating assembly of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the pumping and pressing assembly of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the elastic component and the guide component of the present invention;

[0024] Figure 8 It is a schematic diagram of the state of the resistance assembly of the present invention during operation;

[0025] Fig. 9 It is a schematic diagram of the state after the liquid outlet assembly and the installation tube of the present invention are installed;

[0026] Fig.10 It is a schematic diagram of the structure of the pushing component of the present invention.

[0027] In the figure: 101-needle tube; 102-needle; 103-mounting cylinder; 104-first connecting cylinder; 201-piston plate; 202-pull rod; 203-mounting plate; 204-driving pin; 301-mounting ring; 302-elastic pull rope; 401-slide groove; 402-slider; 5-adjusting ring; 601-operating cylinder; 602-through hole; 603-conical groove; 604-sphere; 701-round plate; 702-round hole; 703-extrusion spring; 801-sleeve; 802-slide rod; 901-second connecting cylinder; 902-delivery tube; 1001-mounting frame; 1002-push rod; 1101-annular groove; 1102-annular plate. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] See also Figure 1-Figure 10 The blood identification puncture needle shown in the figure includes a needle tube 101 and a needle 102 for assisting blood sampling identification puncture. The front end of the needle tube 101 is fixed with a mounting cylinder 103. The end of the needle 102 is connected with a first connecting cylinder 104 for threaded connection with the outer side of the mounting cylinder 103. It also includes a pumping and pressing assembly arranged on the needle tube 101 for assisting sampling and pumping. The pumping and pressing assembly includes a piston plate 201 slidably connected to the inside of the needle tube 101, and the piston plate 201 is fixed A pull rod 202 is fixed, one end of which is located outside the needle tube 101 and fixed with a mounting plate 203. A driving pin 204 for assisting in driving the mounting plate 203 is provided on the mounting plate 203. A resistance component for generating resistance during the pulling and pressing process of the pumping and pressing component and an adjusting member for adjusting the resistance are provided on the needle tube 101. A limiting component for limiting the piston plate 201 after pumping liquid and a liquid discharge component for assisting in discharging liquid after pumping liquid are provided inside the mounting cylinder 103.

[0031] It should be noted here that: in the process of using the blood identification puncture needle for blood puncture sampling, the mutual cooperation of the resistance component, the limit component and the liquid outlet component can not only generate a certain elastic resistance to the pulling of the piston plate 201, but also avoid excessive suction, pressure and pulling during the liquid sampling process through the resistance effect, and further avoid the red blood cell rupture and hemolysis of the blood after the liquid sampling, so as to facilitate more accurate detection operations after sampling, and can also effectively control the closing and liquid outlet operations of the blood after sampling.

[0032] Preferably, the resistance assembly includes a mounting ring 301 sleeved on the outside of the needle tube 101, a sliding assembly for assisting the mounting ring 301 in sliding guidance is arranged between the mounting ring 301 and the needle tube 101, and multiple groups of elastic pull ropes 302 are connected between the mounting ring 301 and the mounting plate 203, and each group of elastic pull ropes 302 is arranged in a state of a ring array;

[0033] It should be noted here that: in the process of moving the mounting plate 203 away from the needle tube 101 to extract liquid from the inside of the needle tube 101, with the movement of the mounting plate 203 and the connection of the elastic pull rope 302, a certain elastic resistance is generated when pulling the mounting plate 203. Through the resistance, excessive extraction and pressure can be avoided during the liquid extraction and sampling process, and further red blood cell rupture and hemolysis can be avoided after the liquid extraction and sampling.

[0034] Preferably, the sliding assembly includes a plurality of groups of slide grooves 401 opened on the outside of the needle tube 101, and each group of slide grooves 401 is arranged in a state of an annular array on the needle tube 101, and each group of slide grooves 401 is slidably connected to a slider 402 inside, and each group of sliders 402 is respectively fixed to the inner side of the mounting ring 301;

[0035] It should be noted here that: the sliding connection of the auxiliary mounting ring 301 is facilitated by multiple sets of sliding grooves 401 and sliding blocks 402.

[0036] Preferably, the adjusting member comprises an adjusting ring 5 sleeved on the outer side of the needle tube 101, the adjusting ring 5 and the outer side of the needle tube 101 are threadedly engaged with each other by means of threads, and a rotating assembly for assisting the rotatable connection is provided between the adjusting ring 5 and one side of the mounting ring 301;

[0037] It should be noted here that: in the process of forming resistance to the extraction and pressure of the blood identification puncture needle through the resistance component, the adjusting ring 5 is rotated. During the rotation of the adjusting ring 5, the mounting ring 301 is driven to rotate through the mutual meshing transmission between the inner side of the adjusting ring 5 and the outer side of the needle tube 101 and the connection action of the rotating component. During the movement of the mounting ring 301, the sliding guiding action of the sliding component makes the mounting ring 301, which is subjected to force, move axially on the outer side of the needle tube 101. During the movement of the mounting ring 301, the spacing between the mounting ring 301 and the mounting plate 203 is adjusted. By adjusting the spacing, the tensioning effect of the elastic pull rope 302 between the mounting ring 301 and the mounting plate 203 is controlled, so that the elastic pull rope 302 can form resistance to the initial pulling of the mounting plate 203 with different pulling forces, so as to form resistance to the extraction and pressure of the extraction and pressure component more flexibly.

[0038] Preferably, the rotating assembly includes an annular groove 1101 opened on one side of the adjusting ring 5, an annular plate 1102 is rotatably connected inside the annular groove 1101, the annular plate 1102 is fixed to one side of the mounting ring 301, the mounting ring 301, the adjusting ring 5, the annular groove 1101 and the annular plate 1102 are concentrically arranged, and the cross-sections of the annular plate 1102 and the annular groove 1101 are T-shaped;

[0039] It should be noted here that the annular groove 1101 and the annular plate 1102 facilitate the rotatable connection between the adjustment ring 5 and the mounting ring 301. During the movement of the adjustment ring 5, the annular groove 1101 and the annular plate 1102 drive the mounting ring 301 to move synchronously.

[0040] Preferably, the limiting assembly includes an operating cylinder 601 fixed inside the mounting cylinder 103, a through hole 602 is provided on the operating cylinder 601, a conical groove 603 is provided inside the operating cylinder 601 and is arranged toward the outside of the mounting cylinder 103, the through hole 602 is arranged in communication with the conical groove 603, a ball 604 is arranged inside the conical groove 603 for resisting and blocking the conical groove 603, and an elastic component for elastically squeezing the ball 604 and a guide component for guiding during the squeezing process are arranged inside the mounting cylinder 103;

[0041] It should be noted that: when the piston plate 201 moves inside the needle tube 101 through transmission, negative pressure is formed between the piston plate 201 and the operating cylinder 601 inside the needle tube 101 as the piston plate 201 moves. Under the action of the pressure, the ball 604 moves toward the circular plate 701 and a gap is generated between the ball 604 and the conical groove 603. Through the existence of the gap, the external blood can be transported to the inside of the needle tube 101 through the mounting cylinder 103, and the mounting plate 203 and the pull rod are stopped. When 202 and the piston plate 201 are pulled, the elastic force of the extrusion spring 703 is used to push the ball 604 and the conical groove 603 against each other, and the mounting tube 103 is blocked against each other to prevent the blood drawn into the needle tube 101 from flowing back. In addition, through the blocking effect of the ball 604 and the conical groove 603 and the medium effect of the blood drawn into the needle tube 101, the piston plate 201, the pull rod 202 and the mounting plate 203 cannot be reset under the elastic force of the elastic pull rope 302 and maintain the limited state after being pulled.

[0042] Preferably, the elastic component includes a circular plate 701 fixed inside the mounting tube 103, the circular plate 701 is provided with a plurality of circular holes 702 for blood circulation, and a compression spring 703 for compressing and pushing the sphere 604 is installed between the circular plate 701 and the sphere 604;

[0043] It should be noted that: the ball 604 is squeezed and pushed by the elastic force of the squeezing spring 703 and the connecting effect of the circular plate 701, so that the ball 604 is kept against the conical groove 603;

[0044] It is worth noting here that the diameter of the circular hole 702 is relatively large to avoid shearing force on the circulating blood.

[0045] Preferably, the guide assembly includes a sleeve 801 fixed on the circular plate 701, a slide rod 802 is slidably connected to the sleeve 801, one end of the slide rod 802 is fixed to the ball 604, and the extrusion spring 703 is sleeved on the outer side of the sleeve 801;

[0046] It should be noted here that the telescopic movement of the ball 604 after being subjected to force is guided by the sleeve 801 and the slide rod 802 .

[0047] Preferably, the liquid outlet assembly includes a second connecting tube 901, which is detachably mounted on the outer side of the second connecting tube 901 and the mounting tube 103 by means of threads, a delivery tube 902 for liquid delivery is fixed on the second connecting tube 901, and a pushing assembly for pushing the ball 604 is arranged inside the second connecting tube 901; the pushing assembly includes a mounting frame 1001 fixed inside the second connecting tube 901, and a push rod 1002 for squeezing and pushing the ball 604 is fixed on the mounting frame 1001;

[0048] It should be noted here that: when the blood drawn into the needle tube 101 needs to be released, the needle 102 is removed from the front end of the needle tube 101. After the removal is completed, the delivery tube 902 is installed on the front side of the needle tube 101 through the threaded connection between the second connecting tube 901 and the outer side of the installation tube 103. During the installation process, the push rod 1002 on the mounting frame 1001 is abutted against the ball 604 inside the operating tube 601. During the abutment process, a gap is generated between the ball 604 and the conical groove 603. Through the effect of the gap and the elastic pulling effect of the elastic pull rope 302 on the mounting plate 203, the pull rod 202 and the piston plate 201, the blood sampled and drawn into the needle tube 101 is discharged outward through the delivery tube 902, completing the blood sampling operation;

[0049] It is worth noting here that the outer diameter of the delivery tube 902 is relatively large, which facilitates the rapid discharge of the sampled blood and avoids shearing force on the discharged blood.

[0050] In this scheme: a blood identification puncture needle comprises the following steps:

[0051] During the process of using the blood identification puncture needle for blood puncture sampling, the needle 102 is installed at the front end of the needle tube 101 through the threaded connection of the first connecting tube 104 and the mounting tube 103. After the needle 102 is installed, the needle 102 is beveled upward to form a certain angle with the skin, and the needle 102 is quickly and smoothly inserted into the skin above or to the side of the vein, and then the needle is slowly inserted. When the needle 102 enters the blood vessel and there is a "falling feeling", the needle insertion is stopped. At this time, the mounting plate 203 is pulled away from the needle tube 101 by the driving pin 204. During the movement of the mounting plate 203, the piston plate 201 is pulled inside the needle tube 101 by the pull rod 202. During the movement of the piston plate 201, the inside of the needle tube 101 is pumped and pressed, so that blood is sucked into the inside of the needle tube 101 through the needle 102, and the blood sampling operation is performed;

[0052] In the process of moving the mounting plate 203 away from the needle tube 101 to extract liquid from the inside of the needle tube 101, with the movement of the mounting plate 203 and the connection of the elastic pull rope 302, a certain elastic resistance is generated when the mounting plate 203 is pulled. Through the resistance, excessive extraction and pressure can be avoided during the liquid extraction and sampling process, and the rupture of red blood cells and the resulting hemolysis in the blood after the liquid extraction and sampling can be further avoided, so that more accurate detection operations can be performed after sampling. In the process of forming resistance to the extraction and pressure of the blood identification puncture needle, as the elastic pull rope 302 is continuously pulled, the pulling resistance of the elastic pull rope 302 to the mounting plate 203, the pull rod 202 and the piston plate 201 continues to increase, thereby ensuring the effect of forming resistance during the pulling and extraction process, and the blood identification puncture needle is restrained by the resistance component. In the process of forming resistance by extraction and pressure, the adjusting ring 5 is rotated. During the rotation of the adjusting ring 5, the mounting ring 301 is driven to rotate through the mutual meshing transmission between the inner side of the adjusting ring 5 and the outer side of the needle tube 101 and the connection effect of the rotating component. During the movement of the mounting ring 301, the mounting ring 301 after being subjected to force is moved axially on the outer side of the needle tube 101 through the sliding guiding effect of the sliding component. During the movement of the mounting ring 301, the spacing between the mounting ring 301 and the mounting plate 203 is adjusted. By adjusting the spacing, the tension effect of the elastic pull rope 302 between the mounting ring 301 and the mounting plate 203 is controlled, so that the elastic pull rope 302 can form resistance to the initial pulling of the mounting plate 203 with different pulling forces, so as to form resistance to the extraction and pressure of the extraction and pressure assembly more flexibly.

[0053] Through transmission, when the piston plate 201 moves inside the needle tube 101, as the piston plate 201 moves, negative pressure is formed between the piston plate 201 and the operating cylinder 601 inside the needle tube 101. Under the action of pressure, the ball 604 moves toward the circular plate 701 and a gap is generated between the ball 604 and the conical groove 603. Through the existence of the gap, the external blood can be transported to the inside of the needle tube 101 through the mounting cylinder 103. When the mounting plate 203, the pull rod 202 and the piston plate 201 are stopped, the elastic force of the extrusion spring 703 pushes the ball 604 and the conical groove 603 to resist each other, and the mounting cylinder 103 is blocked to prevent the blood drawn into the needle tube 101 from flowing back. In addition, through the blocking effect of the ball 604 and the conical groove 603 and the medium effect of the blood drawn into the needle tube 101, the piston plate 201, the pull rod 202 and the mounting plate 203 are The needle 102 is removed from the front end of the needle tube 101 to release the blood drawn into the needle tube 101. After the removal is completed, the delivery tube 902 is installed on the front side of the needle tube 101 through the threaded connection between the second connecting tube 901 and the outer side of the mounting tube 103. During the installation process, the push rod 1002 on the mounting frame 1001 is abutted against the ball 604 inside the operating tube 601. During the abutment process, a gap is generated between the ball 604 and the conical groove 603. Through the action of the gap and the elastic pulling effect of the elastic pull rope 302 on the mounting plate 203, the pull rod 202 and the piston plate 201, the blood drawn into the needle tube 101 is discharged outward through the delivery tube 902, thereby completing the blood sampling operation.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blood identification puncture needle, comprising: A needle tube (101) and a needle (102) for assisting blood sampling and identification puncture, wherein a mounting tube (103) is fixed to the front end of the needle tube (101), and a first connecting tube (104) for threaded connection with the outer side of the mounting tube (103) is fixed to the end of the needle (102); It is characterized by further comprising: A suction and pressure assembly for assisting sampling and suction and pressure is arranged on the needle tube (101), and the suction and pressure assembly includes a piston plate (201) slidably connected to the inside of the needle tube (101), a pull rod (202) is fixed on the piston plate (201), one end of the pull rod (202) is located on the outside of the needle tube (101) and is fixed with a mounting plate (203), and a driving pin (204) for assisting in driving the mounting plate (203) is arranged on the mounting plate (203), a resistance assembly for generating resistance during the suction and pressure pulling process of the suction and pressure assembly and an adjusting member for adjusting the resistance are arranged on the needle tube (101), and a limiting assembly for limiting the piston plate (201) after liquid extraction and a liquid discharge assembly for assisting in liquid discharge after liquid extraction are arranged inside the mounting cylinder (103).

2. A blood testing puncture needle according to claim 1, characterized in that: The resistance component comprises a mounting ring (301) sleeved on the outside of the needle tube (101), a sliding component for assisting the mounting ring (301) in sliding guidance is arranged between the mounting ring (301) and the needle tube (101), and a plurality of groups of elastic pull ropes (302) are connected between the mounting ring (301) and the mounting plate (203), and each group of elastic ropes (302) is arranged in a state of a ring array.

3. A blood identification puncture needle according to claim 2, characterized in that: The sliding assembly includes a plurality of groups of slide grooves (401) opened on the outside of the needle tube (101), and each group of slide grooves (401) is arranged in a ring array on the needle tube (101), and each group of the slide grooves (401) is slidably connected to the inside of each group of the slide grooves (401) with a slider (402), and each group of the sliders (402) is respectively fixed to the inner side of the mounting ring (301).

4. A blood identification puncture needle according to claim 3, characterized in that: The adjusting member comprises an adjusting ring (5) sleeved on the outside of the needle tube (101); the adjusting ring (5) and the outside of the needle tube (101) are threadedly engaged with each other via a thread; and a rotating assembly for assisting the rotatable connection is provided between the adjusting ring (5) and one side of the mounting ring (301).

5. A blood identification puncture needle according to claim 4, characterized in that: The rotating assembly comprises an annular groove (1101) formed on one side of the adjusting ring (5); an annular plate (1102) is rotatably connected inside the annular groove (1101); the annular plate (1102) is fixed to one side of the mounting ring (301); the mounting ring (301), the adjusting ring (5), the annular groove (1101) and the annular plate (1102) are concentrically arranged; and the cross-sections of the annular plate (1102) and the annular groove (1101) are T-shaped.

6. A blood testing puncture needle according to claim 1, characterized in that: The limiting assembly comprises an operating cylinder (601) fixed inside the mounting cylinder (103); a through hole (602) is provided on the operating cylinder (601); a conical groove (603) is provided inside the operating cylinder (601) and is arranged toward the outside of the mounting cylinder (103); the through hole (602) and the conical groove (603) are communicated with each other; a ball (604) is provided inside the conical groove (603) for abutting and blocking the conical groove (603); an elastic component for elastically squeezing the ball (604) and a guide component for guiding during the squeezing process are provided inside the mounting cylinder (103).

7. A blood testing puncture needle according to claim 6, characterized in that: The elastic component includes a circular plate (701) fixed inside the mounting tube (103), the circular plate (701) is provided with a plurality of circular holes (702) for blood circulation, and an extrusion spring (703) for extruding and pushing the sphere (604) is installed between the circular plate (701) and the sphere (604).

8. A blood identification puncture needle according to claim 7, characterized in that: The guide assembly comprises a sleeve (801) fixed on a circular plate (701), a slide rod (802) is slidably connected to the sleeve (801), one end of the slide rod (802) is fixed to the ball (604), and the extrusion spring (703) is sleeved on the outside of the sleeve (801).

9. A blood identification puncture needle according to claim 1, characterized in that: The liquid outlet component includes a second connecting tube (901), and the second connecting tube (901) is detachably mounted on the outer side of the mounting tube (103) by means of threads. A delivery pipe (902) for delivering liquid is fixed to the second connecting tube (901), and a pushing component for pushing the ball (604) is arranged inside the second connecting tube (901).

10. A blood identification puncture needle according to claim 9, characterized in that: The pushing assembly comprises a mounting frame (1001) fixed inside the second connecting tube (901), and a push rod (1002) for squeezing and pushing the ball (604) is fixed on the mounting frame (1001).

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