Disposable peripheral hemostix

Abstract

The invention discloses a disposable peripheral hemostix, and relates to the field of medical supplies. The hemostix comprises a shell, a cavity and a puncture assembly, the shell comprises a shell of a left-right two-piece split structure and a top cover capable of moving up and down, and the top cover is matched with the shell through a cross bone position structure; the cavity is of a soft rubber structure and comprises an upper cover and a base, medical double-faced adhesive tape conforming to biocompatibility is arranged at the bottom of the base, the side end of the base is laterally connected with a blood collection tube in a sleeved and sealed mode, and a duckbilled one-way valve is integrally formed at the other side end of the base. The puncture assembly is wrapped by the cavity and is composed of an elastic support, a guide support, an elastic drive fixing plate, an elastic piece and a puncture piece. When the blood collector is used, the blood collector is fixed through the medical double faced adhesive tape, the puncture piece can be triggered to puncture skin instantly by pressing the top cover through one key, the cavity rebounds to generate negative pressure, and blood flows into the blood collection tube through the collection channel under the action of the negative pressure and gravity. The hemostix is compact in structure, convenient to operate, painless in blood collection, especially suitable for non-professional personnel to operate, and beneficial to application and popularization.

Description

Technical Field

[0001] This invention relates to the field of medical supplies, and in particular to a disposable capillary blood collection device. Background Technology

[0002] Blood sampling is a fundamental step in human health monitoring, and its safety, convenience, and sampling quality directly affect the accuracy of subsequent test results and the user experience. Currently, the most commonly used blood sampling methods in clinical and routine health monitoring are venous blood collection and finger-prick blood collection.

[0003] Venous blood collection must be performed by professional medical personnel, using a venipuncture needle to insert the needle into a vein to draw blood. This method has obvious drawbacks: on the one hand, the needle is inserted to a relatively deep depth, causing intense pain to the test subject, and some test subjects (especially children, the elderly, and those who are afraid of needles) have a strong aversion to it; on the other hand, the operation relies on professional skills, and the test subject needs to go to a hospital or other medical institution to complete the sampling, which is time-consuming and laborious, and cannot meet the needs of home monitoring, instant testing, and other scenarios.

[0004] Finger-prick blood collection is a common method for collecting capillary blood. Although the operation is relatively simple, it still has shortcomings: during the blood collection process, the test subject or medical staff need to squeeze the wound forcefully to obtain enough blood, which not only brings additional discomfort to the test subject, but also easily causes red blood cells to rupture due to improper squeezing force, resulting in hemolysis and thus interfering with the accuracy of the test results; at the same time, most existing finger-prick blood collection devices are simple combinations of blood collection needles and blood collection tubes, and blood is easy to spill during the sampling process, and still requires a certain level of operating skills, making them unsuitable for ordinary users without any professional background to use on their own.

[0005] Therefore, developing a disposable capillary blood collection device that is simple in structure, easy to operate, painless and safe, can be used independently, and can avoid hemolysis has become an urgent technical problem to be solved in this field. Summary of the Invention

[0006] The core objective of this invention is to provide a disposable capillary blood collection device to solve the problems of existing blood collection methods, such as reliance on professional personnel, high pain levels, easy hemolysis, and inconvenience in operation, thereby achieving the following technical effects:

[0007] No professional medical staff are required; ordinary users can complete peripheral blood collection on their own.

[0008] The blood collection process is minimally painful, with small wounds and quick recovery.

[0009] It features a compact structure, easy operation, and high sampling efficiency.

[0010] Single-use, sterilized, safe and hygienic, with no risk of cross-infection.

[0011] To achieve the above objectives, the present invention adopts the following technical solution: a disposable capillary blood collection device, mainly composed of three parts: a shell, a cavity, and a puncture assembly. The structure, connection relationship, and function of each part are as follows:

[0012] 1. Housing: Serving as the external support structure of the blood collection device, it encloses and protects the internal cavity and puncture components, while also providing the user's operating interface. The housing includes a top cover (100) and an outer shell (110):

[0013] The outer shell (110) adopts a two-piece split structure, which is assembled and fixed by symmetrically set buckles. The detachable design facilitates component assembly during product manufacturing. The outer shell (110) has good rigidity, weather resistance and biocompatibility, ensuring structural stability and safety during use.

[0014] The top cover (100) has a cross-shaped rib structure inside. Through the precise engagement of the cross-shaped rib structure with the slot on the top of the outer shell (110), the top cover (100) can only move up and down in the vertical direction and cannot rotate. This ensures the effectiveness of the pressing operation and avoids the misalignment of internal components caused by the rotation of the top cover during operation.

[0015] 2. Cavity: As the core functional component of the blood collection device, it is used to create a negative pressure environment, fix the blood collection position, guide blood flow, and provide limiting protection for the puncture components. The cavity is a one-piece soft silicone structure made of medical-grade silicone, which has good elasticity, sealing and biocompatibility, including the cavity cover (200) and the cavity base (210):

[0016] The cavity cover (200) has excellent elastic recovery ability and can quickly rebound after being pressed, thereby forming a stable negative pressure environment inside the cavity to provide power for blood collection. The upper surface of the cavity cover (200) is closely fitted with the cross bone position of the top cover (100) to ensure that the pressing force of the top cover (100) can be effectively transmitted to the cavity cover (200).

[0017] The cavity base (210) and the cavity cover (200) are integrally formed. Medical double-sided tape (500) is fixedly bonded to the bottom to securely fix the blood collection device to the blood collection site of the test subject (such as fingertip, earlobe, etc.). The side end of the cavity base (210) is provided with a flow channel end for connecting the blood collection tube (400). The other side end is integrally formed with a duckbill-shaped one-way valve (211). This one-way valve only allows the air inside the cavity to be discharged outward and automatically closes in the reverse direction, which can effectively prevent the outside air from entering the cavity and ensure the stability of the negative pressure environment. The cavity base (210) is also provided with a baffle strip (212) and a collection channel (213). The baffle strip (212) is used to collect the blood flowing out of the blood collection site to avoid blood loss. The collection channel (213) is an inclined guide channel that connects the blood collection site and the flow channel end, guiding the blood to flow smoothly into the blood collection tube (400) under the combined action of negative pressure and gravity.

[0018] The medical double-sided tape (500) uses medical-grade acrylic as the adhesive. One side is tightly bonded to the bottom surface of the cavity base (210) with medical-grade adhesive, and the other side can be directly applied to the skin of the test subject. The medical double-sided tape meets the biocompatibility standard, is non-allergenic and non-irritating, and has good sealing (ensuring the cavity is sealed) and peeling performance. When the blood is collected, there is no residue and no pain when it is peeled off the skin.

[0019] The blood collection tube (400) has clear scale lines, which makes it easy for users to observe the blood volume. The blood collection tube (400) is connected to the end of the flow channel of the cavity base (210) by a side insertion sleeve to achieve a tight seal. This not only prevents air leakage from damaging the negative pressure environment, but also allows for quick disassembly after blood collection, which is convenient for subsequent testing.

[0020] 3. Puncture Component: Used to achieve precise and rapid skin puncture, its structural design directly affects the pain level and blood collection effect. The puncture component is enclosed and limited by the cavity cover (200) and cavity base (210) to prevent external contamination and ensure precise and controllable puncture stroke. It mainly consists of an elastic support (300), a guide support (310), an elastic drive upper fixing plate (320), an elastic element (330), an elastic drive lower fixing plate (340), and a puncture element (350).

[0021] The elastic bracket (300) and the guide bracket (310) have good rigidity and toughness; the elastic bracket (300) has a sliding groove inside, and the guide bracket (310) is fitted into the sliding groove and can slide up and down along the sliding groove; the elastic bracket (300) is provided with an elastic bracket arm (303) and an elastic bracket limiting part (302). The elastic bracket arm (303) provides elastic power for the reset of the guide bracket (310), and the elastic bracket limiting part (302) is used to limit the downward stroke of the guide bracket (310) to avoid excessive pressing and damage to the internal components; the elastic bracket (300) is also provided with an elastic bracket buckle (301) to prevent the guide bracket (310) from dislodging from the sliding groove when it is reset.

[0022] The guide bracket (310) has a built-in groove inside, and the elastic drive upper fixing plate (320) is fitted into the built-in groove and can slide up and down; the guide bracket (310) has a first fastening position (311), a second fastening position (312) and a third fastening position (313), and the elastic drive upper fixing plate (320) has a buckle (322) that cooperates with the second fastening position (312). Through the buckle and the fastening position engaging, the elastic drive upper fixing plate (320) is limited and prevented from detaching, thus preventing it from detaching from the built-in groove of the guide bracket (310).

[0023] The bottom of the elastic drive upper fixing plate (320) is provided with an elastic element fastener (323), and the upper end of the elastic element (330) is fastened and fixed with the elastic element fastener (323); the elastic element (330) has good elastic recovery performance and fatigue strength, and its lower end is fastened and fixed with the third fastener (343) on the elastic drive lower fixing plate (340), so as to realize the positioning of both ends of the elastic element (330).

[0024] The elastic drive lower fixing plate (340) is provided with a first fastener (341) and a second fastener (342). The first fastener (341) is detachably fastened to the first engagement position (311) of the guide bracket (310), and remains engaged in the initial state, so that the elastic element (330) is in a pre-compressed state. The second fastener (342) cooperates with the third engagement position (313) of the guide bracket (310) to limit the downward stroke of the elastic drive lower fixing plate (340), thereby fixing the puncture depth of the puncture element (350).

[0025] The puncture piece (350) is fixedly connected to the fourth fastener of the elastically driven lower fixing plate (340) through the puncture piece fastening position (351), and the connection is firm to prevent loosening or falling off during the puncture process.

[0026] The specific steps for using the blood collection device of the present invention are as follows:

[0027] 1. Fixation stage: Apply the medical double-sided tape (500) of the blood collection device to the clean and dry blood collection site. Gently press the outer shell (110) of the blood collection device with your fingers to ensure that the medical double-sided tape adheres tightly to the skin without any air bubbles. At the same time, keep the blood collection tube (400) vertically downward. At this time, the inside of the cavity forms a sealed space through the sealing cooperation between the medical double-sided tape and the skin.

[0028] 2. Puncture stage: Press the top cover (100) vertically with your thumb. The top cover (100) squeezes the upper cover (200) of the cavity downwards. The air inside the cavity is continuously discharged through the duckbill-type one-way valve (211) under pressure. As the top cover (100) continues to press down, the bottom surface of the upper cover (200) of the cavity abuts against the elastic drive upper fixing plate (320) and moves the guide bracket (310) downwards along the slide groove of the elastic bracket (300). When the guide bracket limiting part (314) of the guide bracket (310) and the elastic bracket limiting part (302) of the elastic bracket (300) meet, the guide bracket limiting part (314) of the guide bracket (310) and the elastic bracket limiting part (302) of the elastic bracket (300) are connected. When there is contact, the guide bracket (310) stops moving downward; continue pressing the top cover (100), the elastic drive upper fixing plate (320) moves downward relative to the guide bracket (310), compresses the elastic element (330), and in conjunction squeezes the elastic drive lower fixing plate (340); when the pressing surface (321) of the elastic drive upper fixing plate (320) squeezes the first fastener (341) of the elastic drive lower fixing plate (340), the first fastener (341) undergoes elastic deformation and disengages from the first fastening position (311) of the guide bracket (310), at which time a clear "click" sound will be produced, indicating that the puncture trigger is successful, and immediately release the hand to stop pressing the top cover (100).

[0029] 3. Blood collection stage: After releasing the hand, the elastic element (330) quickly returns to its original state from compression, releasing elastic potential energy and driving the elastic drive lower fixing plate (340) and puncture element (350) to move downwards instantaneously. The puncture element (350) punctures the skin with a fixed stroke. At the same time, the elastic arm (303) of the elastic support (300) drives the guide support (310) to return to its original state. The upper cover (200) of the cavity rebounds under its own elasticity, so that a stable negative pressure environment is formed inside the cavity. Under the combined action of negative pressure attraction and gravity, the blood flowing out of the skin rupture converges into the collection channel (213) through the edge strip (212) and flows smoothly into the blood collection tube (400) along the collection channel (213). When the blood reaches the required scale (such as the minimum sample volume required for testing), the blood collection is completed. Gently peel off the blood collection device and pull the blood collection tube (400) out from the end of the flow channel of the cavity base (210).

[0030] Compared with the prior art, the present invention has the following significant advantages:

[0031] 1. Extremely convenient operation: The entire process only requires three steps: "fix-press-wait". No professional medical staff are needed to assist. Ordinary users (including the elderly, children's family members) can complete the blood collection themselves without complicated training. It is suitable for various scenarios such as home health monitoring and outdoor emergency testing, solving the inconvenience of going to medical institutions for traditional blood collection methods.

[0032] 2. Painless and safe blood collection: The puncture device, combined with the elastic element, enables rapid puncture, resulting in a very small wound and minimal pain for the patient. The product undergoes irradiation sterilization, eliminating the risk of bacterial or viral contamination, and is for single use only, completely avoiding cross-infection. The medical double-sided adhesive meets biocompatibility standards, is non-allergenic, and leaves no residue, further ensuring safety.

[0033] 3. Reasonable structural design: The shell adopts a detachable structure, which is convenient for production and assembly; the cavity is a soft rubber integrated structure with good sealing and elasticity, which can stably generate negative pressure; the puncture component ensures accurate and controllable puncture stroke through multiple fastening structure and limiting design, avoiding over-puncture or under-puncture; the blood collection tube adopts a side-insertion sleeve sealing tight fit method, which not only prevents air leakage but also facilitates disassembly, making it highly practical.

[0034] 4. Wide range of applications: It can meet various peripheral blood collection needs such as personal health monitoring and family medical care. It is especially suitable for children, the elderly, people who are afraid of needles, and other people who are sensitive to pain or have difficulty going to medical institutions. Its application prospects are broad. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the blood collection device of the present invention.

[0036] Figure 2 This is a three-dimensional cross-sectional view of the blood collection device of the present invention (assembly relationship of the shell, cavity and puncture components).

[0037] Figure 3 This is a three-dimensional cross-sectional view of the blood collection device of the present invention from another direction (structure of the one-way valve and the collection channel).

[0038] Figure 4 This is a schematic diagram of the cavity structure of the blood collection device of the present invention (cavity cover, cavity base, one-way valve, edge strip and collection channel).

[0039] Figure 5 This is a schematic diagram of the puncture assembly structure of the blood collection device of the present invention (assembly relationship of each component of the puncture assembly).

[0040] Figure 6 This is a cross-sectional schematic diagram of the puncture component of the blood collection device of the present invention (connection structure of elastic element, drive fixing plate and puncture element).

[0041] Figure 7This is a cross-sectional view of the puncture assembly of the blood collection device of the present invention from another direction (the cooperation relationship between the guide bracket and the elastic bracket).

[0042] Explanation of reference numerals in the attached drawings: 100, top cover; 110, outer shell; 200, cavity top cover; 210, cavity base; 211, one-way valve; 212, edge strip; 213, data acquisition channel; 300, elastic support; 301, elastic support buckle; 302, elastic support limiting part; 303, elastic support elastic arm; 310, guide support; 311, guide support first fastening position; 312, guide support second fastening position; 313, guide support third fastening position; 314, guide support limiting part; 315, guide support upper end face; 320, elastic drive upper fixing. 321. Pressing surface of the upper fixed plate of the elastic drive; 322. Buckle of the upper fixed plate of the elastic drive; 323. Elastic element fastening position of the upper fixed plate of the elastic drive; 324. Lower end face of the upper fixed plate of the elastic drive; 330. Elastic element; 340. Lower fixed plate of the elastic drive; 341. First fastener of the lower fixed plate of the elastic drive; 342. Second fastener of the lower fixed plate of the elastic drive; 343. Third fastener of the lower fixed plate of the elastic drive; 344. Fourth fastener of the lower fixed plate of the elastic drive; 350. Puncture piece; 351. Fastening position of the puncture piece; 400. Blood collection tube; 500. Medical double-sided tape. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] A disposable capillary blood collection device, such as Figure 1-7 As shown, it includes a shell, a cavity, and a puncture assembly, with the specific structure as follows:

[0045] The housing includes a top cover 100 and an outer shell 110. The outer shell 110 is divided into two parts, left and right, which can be disassembled by fastening, facilitating later maintenance and component replacement. The top cover 100 is connected to the outer shell through a cross-shaped rib structure and a fastening sleeve, allowing the top cover 100 to move up and down within a certain range but not to rotate, ensuring the stability of the top cover during operation.

[0046] The cavity, made of soft rubber, consists of a cavity top cover 200 and a cavity base 210, which are enclosed and limited by the outer shell 110. The cross-shaped ribs of the top cover 100 are tightly attached to the upper surface of the cavity top cover 200. Pushing the top cover 100 can compress the cavity top cover 200, and the cavity top cover 200 can generate negative pressure after rebounding. The bottom of the cavity base 210 is adhered with medical double-sided tape 500 for skin fixation. One side of the medical double-sided tape 500 is firmly attached to the bottom surface of the silicone cavity base 210, and the other side can be adhered to the skin of the test subject. It meets biocompatibility requirements, and the adhesive is acrylic, which has the characteristics of being airtight and leak-proof. The blood collection device leaves no residue after the blood is removed from the skin, effectively securing the device and ensuring user comfort. The side of the cavity base 210 connects to the blood collection tube 400, which is laterally inserted into the end of the flow channel of the cavity base 210. A tight, sealed fit prevents air leakage and facilitates removal of the tube for subsequent testing after blood collection. A one-way valve 211 is located on the other side of the cavity base 210. This duckbill-shaped valve allows for unidirectional air release; it closes in the opposite direction to prevent outside air from entering the cavity. It is an integral part of the cavity base 210, ensuring the cavity's airtightness.

[0047] Puncture components, such as Figure 2 and Figure 5 As shown, the cavity is enclosed and limited by the cavity base 210 and the cavity cover 200, including an elastic support 300, a guide support 310, an elastic drive upper fixing plate 320, an elastic element 330, an elastic drive lower fixing plate 340, and a puncture element 350; the elastic support 300, as... Figure 5-7As shown, a guide bracket 310 is internally fitted. When the guide bracket 310 is pressed down, it can move up and down within the sliding groove of the elastic bracket 300 by squeezing the elastic arm 303 of the elastic bracket. When the guide bracket 310 is pressed down to a preset degree, the guide bracket limiting part 314 is limited by the elastic bracket limiting part 302 and cannot be pressed down further. After being released, the elastic arm 303 of the elastic bracket resets, driving the guide bracket 310 to reset. Under the limiting of the elastic bracket buckle 301, the guide bracket 310 will not detach from the sliding groove and pop out. An elastic drive upper fixing plate 320 is internally fitted inside the guide bracket 310. The elastic drive upper fixing plate 320 can move up and down within the sliding groove of the guide bracket 310. The second fastening position 312 of the guide bracket limits the elastic drive upper fixing plate buckle 322 to prevent the guide bracket 310 from detaching from the sliding groove and being pulled out. An elastic element 330 is fitted directly below the elastic drive upper fixing plate 320. The upper end is fastened and fixed by the elastic element fastener 323 of the upper fixed plate, and the lower end is fastened and fixed by the third fastener 343 of the lower fixed plate 340. The upper end of the lower fixed plate 340 is fastened to the first fastening position 311 of the guide bracket by the first fastener 341 of the lower fixed plate, and a piercing element 350 is fixed directly below it. The piercing element 350 is fastened to the fourth fastener 344 of the lower fixed plate by the piercing element fastening position 351.

[0048] When using the blood collection device provided by this invention, firstly, the entire device is attached to the skin using medical double-sided tape 500, with the blood collection tube 400 pointing vertically downwards, thus forming a sealed space inside the cavity. Then, the top cover 100 is pressed down, squeezing the upper cover 200 of the cavity, and air inside the cavity is continuously discharged through the one-way valve 211. When the bottom surface of the upper cover 200 is squeezed against the elastically driven upper fixing plate 320, the guide bracket 310 moves downwards. When pressed down to the preset level, the guide bracket limiting part 314 is limited and held by the elastic bracket limiting part 302, continuing to resist the elastic drive upper fixing plate 320 to compress the elastic element 330, and further pressing the elastic drive lower fixing plate 340; when the guide bracket 310 descends to the elastic drive upper fixing plate pressing surface 321 and presses the elastic drive lower fixing plate first fastener 341, it forces the elastic drive lower fixing plate first fastener 341 to disengage from the guide bracket first fastening position 311, at which point a clear clicking sound will be heard, and you should immediately release and stop pressing down the top cover 100; when the elastic element 330 returns to its original state from compression, it quickly triggers the puncture element 350 to puncture the skin and cause bleeding, at which point the lower end face 324 of the elastic drive upper fixing plate presses against the guide bracket. The upper end face 315 of the frame is used for limiting, and the second fastener 342 of the elastic drive lower fixing plate cooperates with the third fastening position 313 of the guide bracket to play a protective role, preventing the puncture piece 350 from popping out and disengaging, so that the lower fixing plate 340 of the elastic drive is lowered, thereby ensuring that the stroke of the puncture piece 350 is fixed and will not be different due to different pressing depths of the top cover 100; at the moment of release, the elastic arm 303 of the elastic bracket resets, driving the guide bracket 310 to reset, and the cavity cover 200 resets to generate negative pressure. Under the action of negative pressure suction, blood is collected through the channel of the baffle strip 212 into the collection channel 213 and flows to the collection tube 400 for collection. When the blood is collected to the scale line of the collection tube 400, blood collection can be stopped and the blood collection device can be removed. The whole process only requires pressing the top cover 100 until a click is heard and then releasing it. Blood collection is completed in 2 minutes. The operation is convenient, requires no professional assistance, and the blood collection process is almost painless.

[0049] This invention, through precise mechanical structure design and negative pressure blood collection principle, achieves convenient, painless, and accurate peripheral blood collection, solving many drawbacks of existing blood collection technologies and possessing significant practical value and market prospects.

[0050] It should be noted that the above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any obvious modifications, substitutions or alterations without departing from the concept of the present invention should fall within the protection scope of the present invention.

Claims

1. A disposable capillary blood collection device, characterized in that, The application relates to a blood sampling device, which comprises a shell, a cavity and a puncture assembly; the shell comprises a top cover (100) and a shell (110), the shell (110) is a left-right two-piece structure, detachable connection is realized through buckle assembly, a cross-shaped bone site structure is arranged in the top cover (100), the top cover (100) can only move up and down along the vertical direction and cannot rotate through cooperation of the cross-shaped bone site structure and an upper clamping sleeve of the shell (110); the cavity is a soft rubber integrated structure, comprises a cavity upper cover (200) and a cavity base (210), the whole is limited by the shell (110), the cross-shaped bone site of the top cover (100) is close to the upper surface of the cavity upper cover (200), the cavity upper cover (200) can be extruded by pushing the top cover (100), and the cavity upper cover (200) can generate negative pressure after rebound; a medical double-sided adhesive tape (500) is fixedly bonded at the bottom of the cavity base (210), a flow channel end is arranged at the side end, the flow channel end is connected with a blood sampling tube (400) through lateral plug-in sleeve connection, and a one-way valve (211) is integrally formed at the other side end; the puncture assembly is limited by the cavity upper cover (200) and the cavity base (210), comprises an elastic support (300), a guide support (310), an elastic driving upper fixed plate (320), an elastic piece (330), an elastic driving lower fixed plate (340) and a puncture piece (350), the elastic piece (330) can be triggered to release elastic potential energy by extruding the cavity upper cover (200) through pressing the top cover (100), and the puncture piece (350) is driven to instantaneously pierce the skin.

2. The single-use capillary blood sampling device of claim 1, wherein, The one-way valve (211) is a duckbill type structure, only allows the air inside the cavity to be discharged in one direction, and is automatically closed in the reverse direction to prevent external air from entering the cavity, so that the stable negative pressure environment of the cavity is ensured.

3. The single-use lancet of claim 1 wherein, The adhesive of the medical double-sided adhesive tape (500) is acrylic, one side is closely bonded with the bottom surface of the cavity base (210), and the other side can be attached to the skin of a subject, the medical double-sided adhesive tape (500) meets the biological compatibility standard, has the characteristics of air-tightness, no residue after blood sampling and separation from the skin.

4. The single-use capillary blood sampling device of claim 1, wherein, The blood sampling tube (400) and the flow channel end of the cavity base (210) are connected in a sealing and tight fitting mode, which can prevent air leakage and damage the negative pressure environment, and the blood sampling tube (400) can be quickly disassembled and taken out after blood sampling.

5. The single-use capillary blood sampling device of claim 1, wherein, The elastic support (300) is internally provided with a sliding groove, the guide support (310) is sleeved in the sliding groove and can slide up and down in the sliding groove, the elastic support (300) is provided with an elastic support elastic arm (303) and an elastic support limiting part (302), the elastic support elastic arm (303) is used for resetting the guide support (310), and the elastic support limiting part (302) is used for limiting the downward stroke of the guide support (310); the guide support (310) is internally provided with an internal sliding groove, the elastic driving upper fixing plate (320) is sleeved in the internal sliding groove and can slide up and down, the guide support (310) is provided with a first buckling position (311), a second buckling position (312) and a third buckling position (313), the elastic driving upper fixing plate (320) is provided with a buckle (322) matched with the second buckling position (312), and the elastic driving upper fixing plate (320) is limited and prevented from being separated.

6. The single-use capillary blood sampling device of claim 5, wherein, The elastic driving upper fixing plate (320) is provided with an elastic part buckling position (323) at the bottom, the elastic part (330) is buckled and fixed with the elastic part buckling position (323) at the upper end, and the elastic part (330) is buckled and fixed with a third buckling part (343) on the elastic driving lower fixing plate (340) at the lower end; the elastic driving lower fixing plate (340) is provided with a first buckling part (341) and a second buckling part (342), the first buckling part (341) is detachably buckled with the first buckling position (311) of the guide support (310), and the second buckling part (342) is matched with the third buckling position (313) of the guide support (310) to limit the stroke of the puncture part (350); the puncture part (350) is fixedly connected with the fourth buckling part of the elastic driving lower fixing plate (340) through a puncture part buckling position (351).

7. The single-use capillary blood sampling device of claim 1, wherein, The cavity base (210) is provided with a baffle strip (212) and a collection channel (213), the baffle strip (212) is used for converging blood, and the collection channel (213) is connected between the flow channel end and a blood collection position and guides blood to flow into the blood collection tube (400).

8. The single-use capillary blood sampling device of claim 1, wherein, The blood collector is subjected to irradiation sterilization treatment, the product is disposable, and cross infection is avoided.

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