Single-prepressing hemostix

Abstract

The invention provides a single-prepressing hemostix. The single-prepressing hemostix comprises a sealing cover, a bottom cover, a piston rod, a first spring, a needle seat, an unlocking rod, a microneedle, a second spring, a handle cap and a blood collection tube. When the unlocking rod is pressed down, the needle support can be sequentially extruded out and ejected out to puncture the skin, then the unlocking rod is pressed by a certain distance, the piston rod can be clamped on the buckle on the bottom cover of the blood collector to be extruded out, the piston rod moves upwards under the elastic force of the large spring, and blood enters the blood collection tube under the negative pressure effect; after the microneedle completes puncture, the microneedle is automatically pulled out and taken away by the internal mechanism. A double-spring structure is adopted, the needle head and the negative pressure cavity are limited in the mode that the two pairs of slope buckle devices on the piston rod and the unlocking rod are clamped twice, and therefore it can be guaranteed that a user completes the three steps of needle inserting, blood sampling and resetting at a time, the technical threshold of blood sampling is lowered, labor is saved, and the use convenience of the user is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a blood sampling device for operation by non-professionals. Background Art

[0002] In today's medical testing industry, blood sample collection plays a key role in disease diagnosis. However, there are many problems with traditional blood collection methods, especially for non-professionals such as patients, there is a high technical threshold for finding blood vessels and accurately inserting needles. With the development of society and the continuous growth of medical needs, the development of blood collection technology suitable for environments outside hospitals has become a rigid demand for patients.

[0003] The current blood collection technology has the following shortcomings: when drawing blood in the hospital, there are often long queues and noisy environments. It is very inconvenient for the elderly, children and patients with limited mobility to go to the hospital for blood collection. Moreover, blood collection is usually done by professional medical staff, which not only limits the choice of blood collection locations, but also puts great pressure on medical resources. In addition, traditional blood collection methods also have the risk of cross-infection, especially when the same blood collection equipment is used repeatedly. From a technical perspective, the existing multi-needle puncture blood collection and vacuum blood collection tube blood collection technologies, although they meet the blood collection needs to a certain extent, still have many technical problems such as cumbersome operation and unstable negative pressure that need to be solved.

[0004] The applicant proposed a blood collection device for non-professional operation in the prior application CN202411036196.X, which sets the blood collection needle at the first end of the needle holder, and the second end of the needle holder contacts the piston through an elastic device. The needle holder is provided with a stop arm. When the needle holder moves along the first direction of the launch tube, the stop arm and the blocking member in the launch tube change from the first state to the second state, and the blood collection needle is controlled to be excited along the first direction. Under the control of the elastic device, the blood collection needle moves a preset distance along the second direction, so that the blood collection needle cannot contact the skin again after a one-time excitation, thereby avoiding the problem of cross infection caused by multiple punctures. However, in the above-mentioned method, negative pressure needs to be provided by resetting the handle, which is equivalent to that the patient needs multiple steps to complete blood collection when using it, which is prone to misoperation or quantitative deviation problems, and at the same time causes inconvenience to the user. In addition, the blood collection device of the above-mentioned prior application requires the user to press it to trigger the microneedle ejection when in use, and also requires the user to press the piston to generate negative pressure. The two pressing forces are large, which is not conducive to use by the elderly and children. Summary of the invention

[0005] The present invention provides a blood collector, which includes a sealing cover, a bottom cover, a piston rod, a first spring, a needle seat, an unlocking rod, a microneedle, a second spring, a handle cap and a blood collection tube; the unlocking rod is provided with a pair of inverted bosses to pre-compress the second spring, and further includes a pair of first inclined bosses and a pair of second inclined bosses, which correspond to the needle seat and the piston rod respectively. When the unlocking rod is pressed down, the needle holder can be squeezed out and ejected to puncture the skin in sequence, and then pressed a certain distance, the piston rod can be squeezed out of the buckle on the bottom cover of the blood collector, and the piston rod moves upward under the action of the large spring elastic force, and the microneedle fixed on the unlocking rod is also driven by the piston rod to move upward, the microneedle leaves the skin, and the blood enters the blood collection tube under the action of continuous negative pressure. The present invention adopts a double spring structure, and the needle and the negative pressure cavity are limited by two pairs of inclined planes\buckle devices on the piston rod and the unlocking rod. It can ensure that the user completes the three steps of acupuncture, blood collection and resetting at one time, thereby reducing the technical threshold of blood collection.

[0006] The present invention provides a blood sampling device, comprising a sealing cover (01), a bottom cover (02), a piston rod (04), a first spring (06), a needle seat (07), an unlocking rod (08), a microneedle (09), a second spring (10), a handle cap (11) and a blood sampling tube (13);

[0007] The first spring (06) is located between the bottom cover (02) and the unlocking rod (08), and the second spring (10) is located between the piston rod (04) and the bottom cover (02);

[0008] The bottom cover (02) is provided with four first bosses (023), and the four first bosses (023) are used to limit the position of the needle seat (07);

[0009] The piston rod (04) comprises a first guide boss (042) arranged on the inner side, an outer recess (043) arranged on the outer side, and an undercut (045), wherein the undercut (045) corresponds to the first recess (024) of the bottom cover (02) and is engaged so that the first spring (06) is pre-pressed on the bottom cover (02);

[0010] The needle seat (07) is fixedly connected to the microneedle (09) via a buckle (071);

[0011] The unlocking rod (08) is provided with a pair of undercut bosses (082), and the undercut bosses (082) pre-compress the second spring (10); the unlocking rod (08) also includes a pair of first inclined bosses (083) and a pair of second inclined bosses (084), the first inclined bosses (083) corresponding to the needle seat (07), and the second inclined bosses (084) corresponding to the piston rod (04).

[0012] In a feasible embodiment, the blood collection device further comprises a top cover (03), and the top cover (03) is pressed and sealed with the bottom cover (02).

[0013] In a feasible embodiment, a guide groove (031) is provided on the inner side of the top cover (03), and the guide groove (031) corresponds to the guide of the piston rod (04).

[0014] In a feasible embodiment, the blood collection device further comprises a first sealing ring (05), wherein the first sealing ring (05) forms a sealed cavity between the piston rod (04) and the top cover (03).

[0015] In a feasible embodiment, the piston rod (04) is provided with a sealing groove (041) for installing the first sealing ring (05) and a groove guide groove (044) corresponding to the inner side of the outer concave platform (043) to provide guidance for the unlocking rod (08);

[0016] The piston rod (04) further comprises a second groove (046), wherein the second groove (046) limits the unlocking rod (08);

[0017] The piston rod (04) further comprises a second boss (047), wherein the second boss (047) provides an assembly support surface for the needle seat (07).

[0018] In a feasible embodiment, the blood collection device further comprises a second sealing ring (11), and the second sealing ring (11) is installed on the third groove (086) of the unlocking rod (08).

[0019] In a feasible embodiment, when the unlocking rod (08) is pressed downward, the first inclined boss (083) squeezes and deforms the spring undercut (073) in the needle seat (07) inward, causing the spring undercut (073) to disengage from the second boss (047) of the piston rod (04), thereby causing the elastic force of the second spring (10) to be released, pushing the microneedle (09) on the needle (07) out, so that the microneedle (09) pierces the skin.

[0020] In a feasible embodiment, when the unlocking rod (08) is continuously pressed downward, the second inclined boss (084) squeezes and deforms the undercut (045) in the piston rod (04) outward, so that the second inclined surface (084) is disengaged from the first groove (024) of the bottom cover (02), thereby causing the elastic force of the first spring (06) to release and push the piston rod (04) to move upward, forming a negative pressure cavity. Under the negative pressure of the negative pressure cavity, blood can enter the interior of the blood collection tube (13).

[0021] In a feasible embodiment, after the skin is punctured, under the action of the negative pressure, the elastic force of the first spring (06) of the piston rod (04) continues to move, driving the second guide boss (081) of the unlocking rod (08) to move upward through the second groove (046), so that the microneedle (09) detaches from the skin and moves upward.

[0022] In a feasible embodiment, the needle seat (07) is bonded to the inside of the second spring (10), and a guide platform (072) is provided on the outside thereof, and the guide platform (072) corresponds to the third groove (022) of the bottom cover (02):

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. A buckle is provided on the piston rod of the blood collector, which is clamped on the bottom cover of the blood collector, and the large spring that forms negative pressure is pre-compressed in the sealed cavity. When the unlocking rod is pressed down to unlock, the piston rod moves upward under the elastic force of the large spring. The entire cavity directly forms negative pressure during the blood collection process, and the user does not need to operate the handle additionally to form negative pressure, which simplifies the operation process. This design saves labor and greatly improves user convenience.

[0025] 2. A locking buckle is arranged inside the piston rod, and the unlocking rod is buckled inside the piston rod, and the spring is compressed under the unlocking rod, and the needle holder installed under the spring is stuck in the piston rod; when the unlocking rod is pressed down, the needle holder can be squeezed out and ejected in turn for puncture, and then pressed for a certain distance, the buckle of the piston rod stuck on the bottom cover of the blood collector can be squeezed out, and the piston rod moves upward under the action of the large spring elastic force, thereby completing the blood collection steps, shortening the blood collection time, and reducing the user's fear of blood drawing;

[0026] 3. The unlocking stroke of the unlocking lever can be adjusted to a closer distance for unlocking, so that the unlocking becomes pre-pressed in advance, and only a very small stroke is required to complete the needle seat rebound.

[0027] 4. This mechanism pre-compresses the large spring in the sealed cavity by snapping. When the unlocking lever triggers the unlocking, negative pressure is formed. This unlocking method saves effort.

[0028] 5. The unlocking stroke of the unlocking lever can be adjusted to a closer or farther distance for pressing and unlocking, thereby preventing the mechanism from being accidentally triggered

[0029] 6. The ingenious arrangement of the first spring (06) and the second spring (10) provides power for microneedle puncture and negative pressure formation during the blood collection process. By operating the unlocking lever (08), the spring force is released in an orderly manner, so that the microneedle can puncture the skin quickly and accurately, and blood can be collected smoothly under the action of negative pressure. The whole process is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 1 is a three-view diagram of the sealing cover of the blood collection tube of the present invention.

[0031] Figure 2 The figures are a front view and a top view of the bottom cover of the blood collection tube of the present invention.

[0032] Figure 3 The figure is a bottom view of the top cover of the blood collection tube of the present invention.

[0033] Figure 4 The figures are a front view and a top view of the piston rod of the blood collection tube of the present invention.

[0034] Figure 5 The figures are a front view and a top view of the blood collection tube needle holder of the present invention.

[0035] Figure 6 The front view of the unlocking rod of the blood collection tube of the present invention Figure 1 ,face Figure 2 and top view.

[0036] Figure 7 It is a schematic diagram of the original working state of the blood collection tube of the present invention.

[0037] Figure 8 This is a schematic diagram of the first unlocking working state of the blood collection tube of the present invention.

[0038] Fig. 9 This is a schematic diagram of the working state of the microneedle puncturing the skin of the blood collection tube of the present invention.

[0039] Fig.10 Schematic diagram of the second unlocking working state of the blood collection tube of the present invention.

[0040] Fig.11 This is a schematic diagram of the working state of the blood collection tube of the present invention. DETAILED DESCRIPTION

[0041] According to the attached Figure 1-11 As shown, the present invention provides a blood collection device, comprising: a sealing cover (01), a bottom cover (02), a top cover (03), a piston rod (04), a first sealing ring (05), a first spring (06), a needle seat (07), an unlocking rod (08), a microneedle (09), a second spring (10), a handle cap (11), a second sealing ring (12), and a blood collection tube (13).

[0042] In a possible embodiment, see Figure 1 The sealing cover (01) is made of soft rubber and fits the skin. Under vacuum negative pressure, it forms a sealing surface that fits the skin, making it easy for the blood to flow into the blood collection tube (13) through the micro-retention after being sucked out.

[0043] The outer surface of the sealing cover (01) is a lip-shaped sealing ring (011), which can be bonded to the skin surface using adhesive. The back of the adhesive surface has an inclined guide groove, and blood flows along the flow channel into the blood collection tube, reducing the time the blood stays in the collector, so that the blood cannot form clots on the flow channel to hinder the detection of sample suction.

[0044] The microchannel (015) of the sealing cover (01) has a surface made of hydrophobic soft rubber material, and its channel curved surface is a fastest curve, which can make the blood sample take the shortest time after passing the same position and flow out at the fastest speed.

[0045] In a possible embodiment, see Figure 2 The bottom cover (02) acts as a skeleton to support the sealing cover (01), and forms a male and female buckle with the top cover (03) to press the sealing cover to form a seal; the support ring arranged inside it has guide grooves on the inner and outer sides, the outer side is used to provide a first guide (021) for the piston rod, and the inner side is used to provide a second guide (022) for the needle seat; there are also four first bosses (023) inside, and the four first bosses (023) are used to limit the needle seat (07) after it is fired, so that the microneedles are fired to the skin surface at a fixed distance, and also ensure that the microneedles puncture the skin at a fixed depth; a pair of first grooves (024) are arranged inside the internal support ring, and their function is to clamp the undercut of the piston rod (04).

[0046] In a possible embodiment, see Figure 3 The top cover (03) is the support of the entire sampler housing, and forms a male and female buckle with the bottom cover (02) to press the sealing cover to form a seal. The top end is open, and a guide groove (031) is provided on the inner side of the ring for guiding the piston rod (04).

[0047] In a possible embodiment, see Figure 4 , a piston rod (04), which is provided with a sealing groove (041) for installing a sealing ring, a first guiding boss (042) is provided on the inner side thereof, and is guided to move in the bottom cover (02), and is provided with an outer recessed platform (043), which can be guided to move in the top cover (03); a groove guide groove (044) is provided on the inner side corresponding to the outer recessed platform (043), which provides guidance for the unlocking rod (08); it is provided with an undercut (045), which is clamped in the first groove (024) of the bottom cover (02) during assembly, and pre-presses the first spring (06) on the bottom cover (02); it is provided with a second groove (046), which is used to clamp the unlocking rod (08) on the inner side for limiting; it is also provided with a second boss (047) inside, which provides an assembly support surface for the needle seat (07).

[0048] In a feasible embodiment, the first sealing ring (05) forms a sealed cavity between the piston rod (04) and the top cover (03). When the piston rod (04) moves upward, the first sealing ring (05) and the top cover (02) form a pressurized air sealing area, which improves the sealing performance. A trace amount of medical silicone oil is contained inside, which improves the sealing performance and makes pressing smoother.

[0049] Furthermore, the first spring (06) provides continuous power for the vacuum chamber to form a vacuum and to lift the vacuum chamber.

[0050] In a possible embodiment, see Figure 5 The needle holder (07) is used to install the microneedle. The microneedle holder clamps the microneedle by means of a buckle (071) and has good adaptability. The second spring (10) is bonded inside and assembled on the piston rod (04). A guide platform (072) is provided on the outside of the part, which can be guided and moved in the third groove (022) of the base (02). A pair of third bosses (073) are also provided. When the needle holder (07) is ejected, it is limited by the first boss (023) of the base (02). It also ensures that the microneedle punctures the skin to a fixed depth; it is also provided with a pair of spring buckles (074). When the unlocking rod (08) is pressed downward, its guide surface squeezes and deforms the spring buckles (074) inward, so that the spring buckles (074) are separated from the second boss (047) of the piston rod (04), and are thus launched downward under the elastic force of the second spring (10), so that the microneedle punctures the skin. When it moves a fixed distance, it is limited by the first boss (023) on the base (02) to complete the entire puncture action.

[0051] In a possible embodiment, see Figure 6 The unlocking rod (08) is provided with a second guide boss (081) on the outside, which can be guided to move a certain distance in the piston rod (040). When the piston rod (04) moves upward in the opposite direction, the second groove (046) of the piston rod (04) will drive the second guide boss (081) of the unlocking rod (08) to move upward together; it is provided with a pair of undercut bosses (082), and the second spring (10) is installed and bonded inside during assembly. When a certain pre-compression is applied to the second spring (10), the undercut bosses (082) can be used to release the second spring (10). ) is stuck in the second groove (046) of the piston rod (04); the unlocking rod is also provided with two pairs of unlocking inclined bosses, namely a first inclined boss (083) and a second inclined boss (084). When the unlocking rod (08) is pressed downward to unlock, the first inclined boss (083) first squeezes and deforms the spring buckle (073) of the needle seat (07) inward, so that the spring buckle (073) is separated from the second boss (047) of the piston rod (04), and is thus launched downward under the elastic force of the second spring (10), so that the microneedle punctures the skin.

[0052] Furthermore, when the unlocking rod (08) is further pressed downward to unlock, another pair of second inclined bosses (084) squeeze and deform the undercut (045) of the piston rod (04) outward, disengaging from the first groove (024) of the bottom cover (02). Under the elastic force of the first spring (06), the piston rod (04) moves upward, extracting the air in the sealed cavity to form a negative pressure cavity. Under the action of the negative pressure, a small amount of blood will continue to flow out of the skin pierced by the needle. After the blood is collected, it flows into the blood collection tube (13) along the guide groove edge of the sealing cover under the action of gravity. At this time, the piston rod (04) continues to move upward, and the second groove (046) of the piston rod (04) drives the second guide boss (081) of the unlocking rod (08) to move upward. The microneedle (09) is installed on the needle seat (07), and the needle seat (07) is connected to the unlocking rod (08) through the second spring (10). At this time, the microneedle is detached from the skin and moves back; the unlocking rod is provided with a pair of fourth grooves (085) for clamping the handle cap (11); the unlocking rod is provided with a third groove (086) for installing the second sealing ring (11) to form a sealing cavity.

[0053] Furthermore, the microneedle (09) is mounted on the needle holder (07) to provide a skin puncture effect for blood collection.

[0054] Furthermore, the second spring (10) has two end surfaces respectively bonded to the needle seat (07) and the inner concave surface of the unlocking rod (08), and is used to store force to provide power for microneedle excitation.

[0055] Furthermore, a handle cap (11) is mounted on the unlocking rod (08) to provide aesthetics and for the user to press for use.

[0056] Furthermore, a second sealing ring (12) is mounted on the third groove (086) of the unlocking rod (08) to form a sealing cavity.

[0057] Furthermore, a blood collection tube (13) is used to collect blood samples flowing from the skin after puncture.

[0058] In a possible embodiment, see Figure 7-11When using the blood collector, the user needs to put the blood collection tube on the sealing cover so that the sample bleeding port and the sealing cover form a seal. The blood collector mechanism is a one-touch trigger type. When the user presses the handle cap (11) for a certain distance, the unlocking rod (08) is also pressed downward to unlock. A first bevel boss (083) of the two bevel bosses provided on the unlocking rod first squeezes and deforms the spring buckle (073) of the needle seat (07) inward, so that the spring buckle (073) is separated from the second boss (047) of the piston rod (04), and is ejected downward under the elastic force of the spring, so that the microneedle (09) punctures the skin. Four first bosses (023) are provided inside the base (02). When the needle holder (07) is fired, it is limited so that the microneedle (09) is fired to the skin surface at a fixed distance and the microneedle (09) is ensured to penetrate the skin to a fixed depth. When the unlocking rod (08) is continuously pressed downward to unlock, another pair of second inclined bosses (084) squeeze and deform the undercut (045) of the piston rod (04) outward to separate from the first groove (024) of the bottom cover (02). Under the elastic force of the first spring (06), the piston rod (04) moves upward to draw out the air in the sealed cavity to form a negative pressure cavity. Under the negative pressure, a small amount of blood will continue to flow out of the skin pierced by the needle. After the blood is collected, it flows into the blood collection tube (13) along the guide groove edge of the sealing cover under the action of gravity. At this time, the piston rod (04) continues to move upward, and the second groove (046) of the piston rod (04) drives the second guide boss (081) of the unlocking rod (08) to move upward. The needle seat (07) is connected to the unlocking rod (08) through the second spring (10). At this time, the microneedle (09) is detached from the skin and moves back.

[0059] Furthermore, under the effect of negative pressure, a small amount of blood will continue to flow out from the skin punctured by the needle. After the blood is collected, it flows into the blood collection tube (13) along the guide groove edge of the sealing cover under the effect of gravity.

[0060] Furthermore, after the microneedle (09) punctures, a wound surface is formed. After the blood sample seeps out, due to the small amount, the blood will remain in place until the blood reaches a certain volume and adsorbs together. Due to the difference in hydrophilicity, the blood will flow along the wound and remain in the sealing cover (01).

[0061] Furthermore, the sealing cover (01) is tightly attached to the skin and is tightly attached to the skin under negative pressure. The guide slope (012) brings the blood samples together and flows downward. Since the guide slope (012) is a new hydrophobic material, the surface does not stick to the sample. Under the action of gravity, the collected samples are accelerated to flow along the microchannel (015) to the guide slope (012) and enter the blood collection tube 13 of the catheter.

[0062] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. The scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. A blood sampling device, characterized in that: The invention comprises a sealing cover (01), a bottom cover (02), a piston rod (04), a first spring (06), a needle seat (07), an unlocking rod (08), a microneedle (09), a second spring (10), a handle cap (11) and a blood collection tube (13); the first spring (06) is located between the bottom cover (02) and the unlocking rod (08), and the second spring (10) is located between the piston rod (04) and the bottom cover (02); the bottom cover (02) is provided with four first bosses (023), and the four first bosses (023) are used to limit the needle seat (07); the inner side of the piston rod (04) is provided with a first guide boss (042), the outer side is provided with an outer concave boss (043), and An undercut (045), wherein the undercut (045) corresponds to the first groove (024) of the bottom cover (02), and the first spring (06) is pre-pressed on the bottom cover (02) by snapping; the needle seat (07) is fixedly connected to the microneedle (09) by a snap (071); the unlocking rod (08) is provided with a pair of undercut bosses (082), and the undercut bosses (082) pre-press the second spring (10); the unlocking rod (08) also includes a pair of first inclined bosses (083) and a pair of second inclined bosses (084), wherein the first inclined bosses (083) correspond to the needle seat (07), and the second inclined bosses (084) correspond to the piston rod (04).

2. The blood collector according to claim 1, further comprising a top cover (03), wherein the top cover (03) is pressed and sealed with the bottom cover (02).

3. The blood collection device according to claim 2, wherein a guide groove (031) is provided on the inner side of the top cover (03), and the guide groove (031) corresponds to the guide of the piston rod (04).

4. The blood collector according to claim 2, further comprising a first sealing ring (05), wherein the first sealing ring (05) forms a sealed cavity between the piston rod (04) and the top cover (03).

5. The blood collection device according to claim 4, wherein the piston rod (04) is provided with a sealing groove (041) for installing the first sealing ring (05), and a groove guide groove (044) corresponding to the inner side of the outer concave platform (043), providing guidance for the unlocking rod (08); The piston rod (04) further comprises a second groove (046), wherein the second groove (046) limits the unlocking rod (08); The piston rod (04) further comprises a second boss (047), wherein the second boss (047) provides an assembly support surface for the needle seat (07).

6. The blood collector as claimed in claim 1, further comprising a second sealing ring (11), wherein the second sealing ring (11) is mounted on the third groove (086) of the unlocking rod (08).

7. The blood collection device as claimed in claim 1, when the unlocking rod (08) is pressed down, the first inclined boss (083) squeezes and deforms the spring buckle (073) in the needle seat (07) inward, so that the spring buckle (073) is separated from the second boss (047) of the piston rod (04), thereby causing the elastic force of the second spring (10) to be released, pushing the microneedle (09) on the needle seat (07) out, so that the microneedle (09) punctures the skin.

8. The blood collector as claimed in claim 7, when the unlocking rod (08) is continuously pressed downward, the second inclined boss (084) squeezes and deforms the undercut (045) in the piston rod (04) outward, so that the second inclined surface (084) is disengaged from the first groove (024) of the bottom cover (02), thereby causing the elastic force of the first spring (06) to release and push the piston rod (04) to move upward, forming a negative pressure cavity. Under the negative pressure of the negative pressure cavity, blood can enter the interior of the blood collection tube (13).

9. The blood collection device as claimed in claim 8, after puncturing the skin, under the action of the negative pressure, the piston rod (04) continues to move under the elastic force of the first spring (06), and the second groove (046) drives the second guide boss (081) of the unlocking rod (08) to move upward together, so that the microneedle (09) detaches from the skin and moves upward.

10. The blood collection device according to claim 1, wherein the needle seat (07) is bonded to the inside of the second spring (10), and a guide platform (072) is provided on the outside thereof, and the guide platform (072) corresponds to the third groove (022) of the bottom cover (02).

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