Finger blood collecting device

Abstract

The invention relates to the technical field of medical equipment, in particular to a finger blood collection device which comprises a main body assembly and a shell, a built-in cavity is formed in the inner wall of the shell, a negative pressure sleeve is arranged at the end of the built-in cavity, and a pressing cap is further arranged at the end of the negative pressure sleeve; a mounting shell is further arranged on the inner wall of the built-in cavity, a puncture component is arranged on the inner wall of the mounting shell, the end of the puncture component is connected with a suction tube, and the other end of the suction tube is connected with a blood storage tube; the blood storage tube is initially in a contraction state, after the puncture component completes puncture, the puncture component and the blood storage tube are released by pressing a key arranged on the outer wall of the shell, the blood storage tube generates negative pressure, and blood at the end of the puncture component is absorbed into the blood storage tube through the suction tube; by means of controllable negative pressure generated by the negative pressure sleeve, the fingertip skin is locally adsorbed to form a bulge, the epidermis is stretched according to the biomechanical principle, subcutaneous nerves are promoted to move relatively, and therefore the nerve stimulation intensity in the puncture process is physically reduced, and slight pain blood sampling is achieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a finger-prick blood collection device. Background Technology

[0002] Finger-prick blood collection is a crucial preliminary step in areas such as blood glucose monitoring, routine blood screening, and point-of-care testing. The user experience and sample quality directly impact the accuracy of test results and user compliance. Within the field of biomedical engineering, current mainstream finger-prick blood collection devices typically consist of a spring-driven solid lancet and a separate blood collection component. Their core design focuses on using mechanical energy to quickly puncture the skin and relying on capillary pressure to allow blood to flow naturally. This process involves multiple disciplines, including human skin tissue mechanics, microcirculatory fluid dynamics, and pain neurophysiology. However, existing products often fail to adequately consider these biomedical characteristics in their engineering implementation.

[0003] Current technology suffers from the following main problems: First, from a tissue biomechanical perspective, the rigid needle's direct vertical insertion into flat skin easily generates high-intensity, concentrated stimulation of subcutaneous nerve endings, leading to significant pain. Furthermore, the fixed insertion depth cannot adapt to individual differences in stratum corneum thickness and elasticity. Second, in the blood sample acquisition process, reliance on natural blood flow or user squeezing introduces tissue fluid interference, altering blood component concentrations and affecting subsequent analytical accuracy, failing to meet the precision medicine requirement for sample integrity. Additionally, the procedure typically involves multiple independent steps such as pricking, wiping, and blood aspiration, resulting in a cumbersome user experience and posing risks of contamination and evaporation due to blood exposure to air. Finally, the lack of mandatory safety shielding for exposed needle tips after use poses a biosafety hazard. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a finger-prick blood collection device, which includes a main body component, including a shell, wherein an inner cavity is formed in the inner wall of the shell and a negative pressure sleeve is provided at the end of the inner cavity, and a pressing cap is also provided at the end of the negative pressure sleeve;

[0006] The inner wall of the built-in cavity is also provided with an installation shell, and the inner wall of the installation shell is provided with a puncture component. The end of the puncture component is connected to a suction tube and the other end of the suction tube is connected to a storage tube.

[0007] The blood storage vessel is initially in a contracted state. After the puncture component completes the puncture, the puncture component and the blood storage vessel are released by pressing the button on the outer wall of the shell. The blood storage vessel generates negative pressure and draws the blood from the end of the puncture component into the blood storage vessel through the suction tube.

[0008] In a preferred embodiment of the finger-prick blood collection device of the present invention, the puncture component includes a movable head, the movable head is hollow inside and a hollow needle is connected to its end, the end of the movable head is also provided with a connecting block and the end face of the connecting block is provided with a second limiting block.

[0009] As a preferred embodiment of the finger-prick blood collection device of the present invention, the moving head end is provided with a buffer sleeve, the outer wall of the moving head is provided with a limit strip and the end of the limit strip extends to the inner wall of the second guide groove provided in the inner wall of the buffer sleeve.

[0010] In a preferred embodiment of the finger-prick blood collection device of the present invention, the buffer sleeve is installed on the inner wall of the mounting shell, and the outer wall of the buffer sleeve is provided with a guide rail, the end of which extends to the inner wall of the first guide groove opened in the inner wall of the mounting shell and slides therewith.

[0011] In a preferred embodiment of the finger-prick blood collection device of the present invention, a limiting rod is provided at the end of the mounting shell and a pressing block is provided on the outer wall of the limiting rod. A first limiting block is provided on the end face of the pressing block and the first limiting block engages with a second limiting block provided on the outer wall of the connecting block. A third elastic element is also sleeved on the outer wall of the hollow needle and the other end of the third elastic element abuts against the inner wall of the mounting shell.

[0012] As a preferred embodiment of the finger-prick blood collection device of the present invention, wherein: the blood storage tube is connected to the suction tube and the inner wall is provided with a duckbill valve, the end of the blood storage tube is also provided with a support, the end of the blood storage tube is also provided with a top plate, the outer wall of the top plate is provided with a second slider and the end of the second slider has a groove extending to the inner wall of the internal cavity and slides therewith, and the outer wall of the blood storage tube is also provided with a fourth elastic element.

[0013] As a preferred embodiment of the finger-prick blood collection device of the present invention, wherein: the end of the mounting shell is further provided with a connector and the outer wall of the connector is provided with a first slider, the end of the first slider extends to the inner wall of the groove and slides therewith, and the outer wall of the suction tube is further provided with a fifth elastic member, one end of the fifth elastic member is provided at the end of the connector, and the other end is in contact with the end face of the blood storage tube.

[0014] In a preferred embodiment of the finger-prick blood collection device of the present invention, the button is installed on the inner wall of the housing and a connecting rod is provided at the center of the button shaft. The end of the connecting rod extends to the inner wall of the slide groove and is hinged to the end of the hinge rod provided on the inner wall of the slide groove.

[0015] In a preferred embodiment of the finger-prick blood collection device of the present invention, the end of the hinge rod is further provided with a locking block and the locking block cooperates with the end of the first slider.

[0016] As a preferred embodiment of the finger-prick blood collection device of the present invention, the inner wall of the built-in cavity is further provided with a protrusion, the protrusion cooperates with the pressing block to squeeze the pressing block to deform it, and the first limiting block and the second limiting block provided on the end face of the pressing block are misaligned to release the limiting of the connecting block.

[0017] The beneficial effects of this invention are as follows: Controllable negative pressure generated by the negative pressure sleeve locally absorbs the skin at the fingertip, forming a bulge. Utilizing biomechanical principles, this stretches the epidermis and promotes relative displacement of subcutaneous nerves, thereby physically reducing the intensity of nerve stimulation during puncture and achieving painless blood collection. Simultaneously, a multi-stage guiding mechanism constrains the puncture trajectory, ensuring the hollow needle precisely penetrates to a preset depth at a specific location on the stretched skin, avoiding unnecessary tissue damage or blood collection failure due to puncture deviation, thus improving the controllability and safety of the operation. Regarding blood sample collection and preservation, a staged release design is adopted, achieving fully automated continuous completion from puncture to blood collection. This process eliminates the need for manual squeezing of the finger, reducing the mixing of tissue fluid and ensuring the purity and consistency of the blood sample. The storage tube inlet integrates a duckbill valve, forming a one-way fluid channel to prevent blood backflow or air entry, which helps maintain the biochemical stability of the blood sample and provides a reliable sample for subsequent testing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a finger-prick blood collection device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the built-in cavity in this invention;

[0021] Figure 3 This is a side sectional view of the negative pressure sleeve in this invention;

[0022] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0023] Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B;

[0024] Figure 6 This is a schematic diagram of the overall structure of the puncture component in this invention;

[0025] Figure 7This is an exploded view of the internal structure of the puncture component in this invention;

[0026] Figure 8 This is a schematic diagram of the overall structure of the moving head in this invention.

[0027] Reference numerals: 100, main component; 101, outer shell; 1011, internal cavity; 1012, fitting opening; 1013, protrusion; 1014, slide groove; 102, negative pressure sleeve; 1021, first elastic element; 1022, press cap; 103, hinge rod; 1031, locking block; 104, button; 1041, connecting rod; 1042, second elastic element;

[0028] 201. Mounting shell; 2011. Connector; 2012. First slider; 2013. Limiting rod; 2014. Pressing block; 2015. First limiting block; 2016. First guide groove; 202. Buffer sleeve; 2021. Guide rail; 2022. Second guide groove; 203. Moving head; 2031. Hollow needle; 2032. Connecting block; 2033. Second limiting block; 2034. Limiting strip; 2035. Third elastic element; 204. Straw; 205. Storage tube; 2051. Duckbill valve; 2052. Support column; 206. Top plate; 2061. Second slider; 2062. Fourth elastic element. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1

[0033] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a finger-prick blood collection device.

[0034] Specifically, the main component 100 includes a housing 101, an inner cavity 1011 is provided on the inner wall of the housing 101, and a negative pressure sleeve 102 is provided at the end of the inner cavity 1011. A pressing cap 1022 is also provided at the end of the negative pressure sleeve 102.

[0035] The inner wall of the internal cavity 1011 is also provided with an installation shell 201. The inner wall of the installation shell 201 is provided with a puncture component. The end of the puncture component is connected to a suction tube 204 and the other end of the suction tube 204 is connected to a storage tube 205.

[0036] The blood storage vessel 205 is initially in a contracted state. After the puncture component completes the puncture, the puncture component and the blood storage vessel 205 are released by pressing the button 104 located on the outer wall of the housing 101. The blood storage vessel 205 generates negative pressure and draws the blood from the end of the puncture component into the blood storage vessel 205 through the suction tube 204.

[0037] The outer shell 101 is an integral support structure, and the inner cavity 1011 on the inner wall provides installation and movement space for all internal components. The negative pressure sleeve 102 at the end of the inner cavity 1011 is in the initial unpressed position, and the pressing cap 1022 at the end of the negative pressure sleeve 102 is exposed outside the outer shell 101 for easy operation by the user. Before use, the user presses the pressure cap 1022, which compresses the lower negative pressure sleeve 102. Then, the user aligns the fingertip with the fitting opening 1012 at the end of the negative pressure sleeve 102, ensuring a tight fit between the fingertip skin and the contact area of ​​the fitting opening 102. After releasing the pressure cap 1022, the first elastic element 1021 returns to its elasticity, causing the negative pressure sleeve 102 to move upward. When the negative pressure sleeve 102 moves upward, it creates negative pressure inside the internal cavity 1011, which draws the patient's finger skin inward through the fitting opening 1012, forming a small bulge. At this time, the skin at the fingertip is stretched and thinned, preparing for subsequent puncture and blood collection.

[0038] The puncture component is initially in a contracted, untriggered state, with its end aligned with the internal channel of the negative pressure sleeve 102, ensuring precise contact with the fingertip skin after puncture. The puncture component is connected to the blood storage tube 205 via the suction tube 204, forming a complete blood transport channel. The blood storage tube 205 is installed at the corresponding position in the internal cavity 1011, awaiting blood collection.

[0039] The storage tube 205 is initially in a contracted state, its internal volume is compressed, and it has energy storage characteristics. After the user completes the contact between the fingertip and the negative pressure sleeve 102, by pressing the button 104 on the outer wall of the outer shell 101, the button 104 triggers the internal structure to release, first releasing the puncture component, causing the puncture component to perform the puncture action, penetrating the fingertip skin. At this time, due to the negative pressure effect on the fingertip skin, it is drawn upward to form a bulge. The skin has been stretched and thinned and the nerve has been pushed away from the center, greatly reducing the stinging sensation during subsequent punctures.

[0040] After the puncture is completed, press the button 104 corresponding to the location of the storage vessel 205 to release the storage vessel 205. The originally constricted storage vessel 205 begins to expand, increasing its internal volume and generating negative pressure. This negative pressure is transmitted to the end of the puncture component through the suction tube 204, drawing the blood flowing from the fingertip into the suction tube 204. The blood is then transported along the suction tube 204 into the storage vessel 205, completing the blood collection and storage.

[0041] Example 2

[0042] Reference Figures 5-8 This is the second embodiment of the present invention, which is implemented based on the previous embodiment.

[0043] Specifically, the puncture component includes a movable head 203, which is hollow inside and has a hollow needle 2031 connected to its end. The movable head 203 also has a connecting block 2032 at its end and a second limiting block 2033 on its end face.

[0044] Among them, the movable head 203 is the core carrier of the puncture component. Its hollow internal structure is used to construct a blood transmission channel. One end of it is fixedly connected to the hollow needle 2031 to ensure that after puncture, blood can flow into the internal channel of the movable head 203 through the hollow needle 2031. After the hollow needle 2031 penetrates the skin of the fingertip and draws out capillary blood, the blood is then drawn into the needle by subsequent negative pressure and further transmitted upward along the hollow channel inside the movable head 203.

[0045] The connecting block 2032 is fixed to the top of the moving head 203, and the second limiting block 2033 is installed on the surface of the connecting block 2032. It is used to cooperate with the limiting component on the outer wall of the mounting shell 201 to lock and release the moving head 203, limit the initial position of the moving head 203, and avoid accidental puncture.

[0046] Preferably, the end of the moving head 203 is fitted with a buffer sleeve 202, and the outer wall of the moving head 203 is provided with a limiting strip 2034, the end of which extends to the inner wall of the second guide groove 2022 provided on the inner wall of the buffer sleeve 202.

[0047] The buffer sleeve 202 is fitted over the movable head 203 and is made of flexible medical plastic. It buffers the impact during puncture and limits the movement direction of the movable head 203. The limiting strip 2034 is a long, raised section on the outer wall of the movable head 203, which cooperates with the second guide groove 2022 on the inner wall of the buffer sleeve 202. When the movable head 203 performs a puncture, the limiting strip 2034 on its outer wall can only move linearly back and forth along the second guide groove 2022, preventing radial deviation of the movable head 203 and ensuring that the hollow needle 2031 always moves along the preset puncture direction, accurately aligning with the center of the fingertip bulge. Simultaneously, the flexible material of the buffer sleeve 202 absorbs the instantaneous impact during puncture, reducing the hard damage to the skin caused by the hollow needle 2031 and further reducing puncture pain.

[0048] The buffer sleeve 202 is installed on the inner wall of the mounting shell 201. The outer wall of the buffer sleeve 202 is provided with a guide rail 2021, and the end of the guide rail 2021 extends to the inner wall of the first guide groove 2016 opened in the inner wall of the mounting shell 201 and slides with it.

[0049] The guide rail 2021 is a long, raised structure on the outer wall of the buffer sleeve 202, and the first guide groove 2016 is a corresponding long, recessed groove on the inner wall of the mounting shell 201. Together, they form a two-stage guiding and mating structure. The buffer sleeve 202 is fixed to the inner wall of the mounting shell 201 through the sliding engagement of the guide rail 2021 and the first guide groove 2016, ensuring the relative position stability of the buffer sleeve 202 and the mounting shell 201. Simultaneously, the engagement of the second guide groove 2022 between the moving head 203 and the buffer sleeve 202 with the limiting strip 2034 limits the movement trajectory of the puncture components from the overall perspective to the local level, preventing the hollow needle 2031 from shifting or shaking during puncture, ensuring the accuracy of the puncture depth and position, and avoiding additional skin damage or blood collection failure due to needle deviation.

[0050] The mounting housing 201 is provided with a limiting rod 2013 at its end, and a pressing block 2014 is provided on the outer wall of the limiting rod 2013. A first limiting block 2015 is provided on the end face of the pressing block 2014, and the first limiting block 2015 is engaged with a second limiting block 2033 provided on the outer wall of the connecting block 2032. A third elastic element 2035 is also sleeved on the outer wall of the hollow needle 2031, and the other end of the third elastic element 2035 abuts against the inner wall of the mounting housing 201.

[0051] The third elastic element 2035 is installed at the lower part of the hollow needle 2031 and is in a compressed state when the moving head 203 is fixed inside the mounting shell 201. The limiting rod 2013 is installed at the top of the mounting shell 201 to fix the pressing block 2014. The pressing block 2014 is a plastic part with elastic deformation capability. It can undergo lateral deformation when squeezed by external force and can return to its original shape when the external force is released.

[0052] The first limiting block 2015 is a protrusion on the end face of the pressing block 2014, which forms a locking structure with the second limiting block 2033 on the connecting block 2032 to limit the initial position of the moving head 203.

[0053] In the initial state, the first limiting block 2015 and the second limiting block 2033 are engaged with each other, locking the moving head 203 in the retracted position. At this time, the third elastic element 2035 remains compressed to store energy. When an external triggering force is applied to the pressing block 2014, the pressing block 2014 undergoes lateral deformation, causing the first limiting block 2015 and the second limiting block 2033 to be misaligned and separated, and the locking state is released. The pre-compressed third elastic element 2035 releases its elastic potential energy instantaneously, generating a thrust along the direction of the guide groove, which pushes the moving head 203 to move rapidly along the second guide groove 2022, thereby causing the hollow needle 2031 to retract one distance inside the mounting shell 201. The hollow needle 2031 then completes the puncture action and retracts, located above the fingertip bulge, preparing for subsequent negative pressure blood aspiration.

[0054] Preferably, the blood vessel 205 is connected to the straw 204 and has a duckbill valve 2051 on its inner wall. The end of the blood vessel 205 is also provided with a support 2052 and a top plate 206. The outer wall of the top plate 206 is provided with a second slider 2061, and the end of the second slider 2061 has a groove 1014 extending into the inner wall of the inner wall of the internal cavity 1011 and slidingly engaging with it. The outer wall of the blood vessel 205 is also provided with a fourth elastic element 2062.

[0055] Among them, the duckbill valve 2051 is a one-way flexible valve structure, which is installed at the connection between the storage tube 205 and the suction tube 204. Its function is to allow blood to flow into the storage tube 205 only from the suction tube 204, prevent blood backflow or outside air from entering the storage tube 205, and ensure the purity and storage stability of the blood sample. It is installed and fixed inside the built-in cavity 1011 by the support 2052 on the lower surface.

[0056] Meanwhile, the second slider 2061 is a protruding structure on the outer wall of the top plate 206, which forms a sliding fit with the groove 1014 on the inner wall of the internal cavity 1011. It is used to limit the expansion and contraction direction of the storage vessel 205 and ensure linear movement. The fourth elastic element 2062 is a compression spring. In the initial state, it is in a pre-compressed state. When the storage vessel 205 is unlocked, the fourth elastic element 2062 gradually restores its elastic deformation, pushing the top plate 206 to slide outward along the groove 1014, causing the storage vessel 205 to expand synchronously. Its internal volume increases and generates negative pressure, which absorbs blood from the fingertip through the straw 204. When the blood flows into the storage vessel 205 through the straw 204, the duckbill valve 2051 opens under the action of blood pressure. After the blood has completely entered the storage vessel 205, the duckbill valve 2051 closes automatically to prevent blood backflow.

[0057] Example 3

[0058] Reference Figures 1-4 This is the third embodiment of the present invention, which is implemented based on the previous embodiment.

[0059] Specifically, the end of the mounting shell 201 is also provided with a connector 2011 and the outer wall of the connector 2011 is provided with a first slider 2012. The end of the first slider 2012 extends to the inner wall of the groove 1014 and slides therewith. The outer wall of the straw 204 is also provided with a fifth elastic member. One end of the fifth elastic member is located at the end of the connector 2011, and the other end is in contact with the end face of the storage tube 205.

[0060] The first slider 2012 is a protrusion on the outer wall of the connector 2011, which forms a sliding fit with the groove 1014 on the inner wall of the inner cavity 1011. It is used to limit the movement trajectory of the mounting shell 201 in the inner cavity 1011, ensuring that the mounting shell 201 can only move linearly back and forth along the groove 1014 and avoid radial deviation. The fifth elastic element is a compression spring, which is sleeved on the outside of the suction tube 204 and does not affect blood transmission. Its function is to push the mounting shell 201 and the moving head 203 inside it downward quickly, so that the hollow needle 2031 completes the puncture action.

[0061] Preferably, the button 104 is mounted on the inner wall of the housing 101 and a connecting rod 1041 is provided at the axis of the button 104. The end of the connecting rod 1041 extends to the inner wall of the slide groove 1014 and is hinged to the end of the hinge rod 103 provided on the inner wall of the slide groove 1014.

[0062] The end of the hinge rod 103 is also provided with a locking block 1031, and the locking block 1031 cooperates with the end of the first slider 2012.

[0063] In the initial state, the locking block 1031 is embedded in the wedge-shaped groove of the first slider 2012. The wedge-shaped surface locks the position of the first slider 2012, thereby fixing the mounting shell 201 and ensuring that the piercing component is in a retracted and locked state to avoid accidental triggering. The connecting rod 1041 is a rigid rod structure. One end is fixedly connected to the axis of the button 104, and the other end is hinged to the hinge rod 103 to transmit the pressing action of the button 104.

[0064] When the user presses button 104, button 104 moves into the internal cavity 1011, driving the connecting rod 1041 to advance synchronously. The connecting rod 1041 pushes the hinge rod 103 to rotate around the hinge point, converting the vertical pressing force into the horizontal rotational force at the end of the hinge rod 103. The wedge-shaped surface of the locking block 1031 slides along the inclined surface of the groove of the first slider 2012 and disengages from the groove, releasing the lock on the first slider 2012. At this time, the mounting shell 201 is pushed by the fifth elastic element and can move quickly downward along the slide groove 1014, completing the puncture action through the hollow needle 2031 at the end.

[0065] Preferably, the inner wall of the built-in cavity 1011 is also provided with a protrusion 1013, which cooperates with the pressing block 2014 to squeeze the pressing block 2014 to deform it. The first limiting block 2015 and the second limiting block 2033 located on the end face of the pressing block 2014 are misaligned to release the limiting of the connecting block 2032.

[0066] The protrusion 1013 is an integrated protrusion structure on the inner wall of the built-in cavity 1011, on the same side as the pressing block 2014 and located below it, serving to provide a fixed compression fulcrum. The pressing block 2014 and the limiting rod 2013 are integrally formed. When the mounting shell 201 is unlocked, it moves along the slide groove 1014 towards the fitting opening 1012 under the elastic force of the fifth elastic element. The mounting shell 201 drives the limiting rod 2013 to move synchronously, thereby driving the pressing block 2014 closer to the protrusion 1013. When the mounting shell 201 moves to the preset position, the hollow needle 2031 has completed the piercing action. At this time, the pressing block 2014 contacts and compresses the protrusion 1013. The rigid support of the protrusion 1013 makes the pressing block 2014 press against the protrusion 1013. The pressure block 2014 undergoes lateral elastic deformation; when the pressure block 2014 deforms, the first limiting block 2015 on its end face moves synchronously with the deformation, and is misaligned and separated from the second limiting block 2033 on the connecting block 2032, thus releasing the lock on the connecting block 2032; at this time, the pre-compressed third elastic element 2035 releases its elastic force, driving the moving head 203 to retract upward on the inner wall of the mounting shell 201, and the hollow needle 2031 is located above the bulge, which, together with the negative pressure generated by the decompression of the upper storage tube 205, completes the aspiration and collection of blood.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A finger blood collection device, characterized by: Include: The main body assembly (100) includes a shell (101), the inner wall of the shell (101) is provided with a built-in cavity (1011), and the end of the built-in cavity (1011) is provided with a negative pressure sleeve (102), and the end of the negative pressure sleeve (102) is further provided with a pressing cap (1022); The inner wall of the built-in cavity (1011) is further provided with a mounting shell (201), and the inner wall of the mounting shell (201) is provided with a puncture component, the end of the puncture component is connected with a suction tube (204), and the other end of the suction tube (204) is connected with a blood storage tube (205); The blood storage tube (205) is initially in a contracted state, and after the puncture component completes the puncture, the puncture component and the blood storage tube (205) are released by pressing the button (104) provided on the outer wall of the shell (101), respectively, the blood storage tube (205) generates negative pressure and absorbs the blood at the end of the puncture component into the blood storage tube (205) through the suction tube (204).

2. The finger blood collection device of claim 1, wherein: The puncture component includes a moving head (203), the inside of the moving head (203) is hollow, and the end of the moving head (203) is connected with a hollow needle (2031), the end of the moving head (203) is further provided with a connecting block (2032), and the end surface of the connecting block (2032) is provided with a second limiting block (2033).

3. The finger blood collection device of claim 2, wherein: The end of the moving head (203) is sleeved with a buffer sleeve (202), the outer wall of the moving head (203) is provided with a limiting strip (2034), and the end of the limiting strip (2034) extends into the inner wall of the second guide groove (2022) provided in the inner wall of the buffer sleeve (202).

4. The finger blood collection device of claim 3, wherein: The buffer sleeve (202) is installed on the inner wall of the mounting shell (201), the outer wall of the buffer sleeve (202) is provided with a guide rail (2021), and the end of the guide rail (2021) extends into the inner wall of the first guide groove (2016) provided in the inner wall of the mounting shell (201) and is in sliding fit with the same.

5. The finger blood collection device of claim 4, wherein: The end of the mounting shell (201) is provided with a limiting rod (2013), the outer wall of the limiting rod (2013) is provided with a pressing block (2014), the end surface of the pressing block (2014) is provided with a first limiting block (2015), the first limiting block (2015) is engaged with the second limiting block (2033) provided on the outer wall of the connecting block (2032), the outer wall of the hollow needle (2031) is further sleeved with a third elastic element (2035), and the other end of the third elastic element (2035) abuts against the inner wall of the mounting shell (201).

6. The finger blood collection device of claim 5, wherein: The blood storage tube (205) is in communication with the suction tube (204) and is provided with a duckbill valve (2051) in the inner wall, the end of the blood storage tube (205) is further provided with a support (2052), the end of the blood storage tube (205) is further provided with a top plate (206), the outer wall of the top plate (206) is provided with a second sliding block (2061), the end of the second sliding block (2061) extends into the inner wall of the sliding groove (1014) provided in the inner wall of the built-in cavity (1011) and is in sliding fit with the same, and the outer wall of the blood storage tube (205) is further provided with a fourth elastic element (2062).

7. The finger blood collection device of claim 6, wherein: The mounting shell (201) is also provided with a connecting head (2011) at the end, and the outer wall of the connecting head (2011) is provided with a first sliding block (2012), the end of the first sliding block (2012) extends to the inner wall of the sliding groove (1014) and is in sliding fit with the inner wall, the outer wall of the suction tube (204) is further sleeved with a fifth elastic member, one end of the fifth elastic member is arranged at the end of the connecting head (2011), and the other end is in contact with the end surface of the blood storage tube (205).

8. The finger blood collection device of claim 7, wherein: The key (104) is mounted on the inner wall of the shell (101), and the key (104) is provided with a connecting rod (1041) at the axis, the end of the connecting rod (1041) extends to the inner wall of the sliding groove (1014) and is hingedly connected with the end of the hinge rod (103) arranged on the inner wall of the sliding groove (1014).

9. The finger blood collection device of claim 8, wherein: The end of the hinge rod (103) is also provided with a clamping block (1031), and the clamping block (1031) is matched with the end of the first sliding block (2012).

10. The finger blood collection device of claim 9, wherein: The inner wall of the built-in cavity (1011) is further provided with a protruding block (1013), the protruding block (1013) is matched with the pressing block (2014) and is used for extruding the pressing block (2014) to deform, the first limiting block (2015) arranged on the end surface of the pressing block (2014) is dislocated with the second limiting block (2033) to release the limiting of the connecting block (2032).

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