Blood collection needle

Abstract

Provided is a blood collection needle, which comprises: an outer sleeve (1) which is provided with a first end and a second end, wherein the second end is provided with a needle outlet (14), a first stop step (11) is arranged on an inner wall of the outer sleeve (1), and the first stop step (11) extends a certain length along a circumferential direction of the outer sleeve (1); a needle core (2) which is adapted to be assembled inside the outer sleeve (1), wherein a needle head (23) is arranged at the end part of the needle core (2) proximal to the needle outlet (14), a stop rib (21) and a driving rib (22) are arranged on an outer wall of the needle core (2), and the stop rib (21) is adapted to abut against the first stop step (11) in an axial direction; a button (3) which is adapted to be assembled in a pressing manner at the first end in a direction toward the needle outlet (14) and comprises a button cap (31) and an extension arm (32), wherein the extension arm (32) is located on the side of the button cap (31) facing the needle outlet (14), and the extension arm (32) is provided with a driving surface (34); and the driving surface (34) which is adapted to drive the driving rib (22) to rotate in the circumferential direction when the button (3) moves toward the needle outlet (14), such that the stop rib (21) is disengaged from a circumferential position blocked by the first stop step (11) to allow the needle core (2) to move toward the needle outlet (14). The blood collection needle can prevent delay.

Description

A blood collection needle

[0001] This application claims priority to Chinese Patent Application No. 2024118125950, filed on December 10, 2024, entitled "A Blood Collection Needle", the entire contents of which are incorporated herein by reference. Technical Field

[0002] Embodiments of this disclosure relate to the field of medical devices, and more particularly to a blood collection needle. Background Technology

[0003] The existing top-triggered lancet uses a button-driven needle core rotation and firing mechanism. After pressing the top button to trigger firing, the two wings of the needle core enter the firing slot and move towards the needle outlet, thus completing the firing of the lancet. Due to gaps between the components of the lancet, the two wings of the needle core cannot immediately enter the firing slot after pressing the top button to trigger firing, resulting in a firing delay. Summary of the Invention

[0004] This disclosure is made to alleviate or resolve at least one aspect or point of the above-mentioned problems.

[0005] This disclosure provides a blood collection needle, comprising: an outer sheath having a first end and a second end, the second end having a needle outlet, the inner wall of the outer sheath having a first stop platform extending a certain length circumferentially along the outer sheath; a needle core adapted to be assembled inside the outer sheath, the end of the needle core near the needle outlet having a needle tip, the outer wall of the needle core having a stop rib and a drive rib, the stop rib being adapted to abut against the first stop platform axially; and a button adapted to be pressed onto the first end toward the needle outlet, comprising a keycap and an extension, the extension being located on the side of the keycap toward the needle outlet, the extension having a drive surface; the drive surface being adapted to drive the drive rib to rotate circumferentially when the button moves toward the needle outlet, such that the stop rib disengages from a circumferential position blocked by the first stop platform to allow the needle core to move toward the needle outlet. Attached Figure Description

[0006] Figure 1 is a perspective view of a jacket according to an exemplary embodiment of the present disclosure;

[0007] Figure 2 is a cross-sectional view of the outer jacket in Figure 1;

[0008] Figure 3 is a perspective view of a needle core according to an exemplary embodiment of the present disclosure;

[0009] Figure 4 is a perspective view of a button according to an exemplary embodiment of the present disclosure;

[0010] Figure 5 is a schematic diagram of a blood collection needle in an assembled state according to an exemplary embodiment of the present disclosure;

[0011] Figure 6 is a schematic diagram of a blood collection needle in a firing state according to an exemplary embodiment of the present disclosure;

[0012] Figure 7 is a schematic diagram of a blood collection needle during the firing process according to an exemplary embodiment of the present disclosure;

[0013] Figure 8 is a schematic diagram of a blood collection needle after firing according to an exemplary embodiment of the present disclosure.

[0014] In the diagram: 1. Outer shell; 10. Protrusion; 11. First stop platform; 12. Second stop platform; 13. Anti-rotation platform; 14. Needle outlet; 15. Guide rib; 16. Stop rib; 2. Needle core; 21. Stop rib; 22. Drive rib; 23. Needle tip; 24. Needle cap; 25. Boss; 3. Button; 31. Keycap; 32. Extension arm; 33. Drive protrusion; 34. Drive surface; 35. Anti-rotation protrusion; 36. Anti-rotation surface; 37. Center protrusion; 41. Launch spring; 42. Return spring. Detailed Implementation

[0015] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this disclosure.

[0016] The blood collection needle in this embodiment eliminates the needle core side wing-emission groove structure. It utilizes the engagement of the stop rib on the outer wall of the needle core with the first stop platform on the inner wall of the outer sleeve to limit the axial position of the needle core before emission. Furthermore, the driving surface on the button drives the needle core to rotate, causing it to disengage from its circumferential position blocked by the first stop platform, allowing it to move towards the needle outlet and thus achieve emission. Because the stop rib of the needle core directly abuts against the first stop platform of the outer sleeve before emission, pressing the top button to trigger emission allows the needle core to immediately move axially towards the needle outlet, thereby solving the emission delay problem.

[0017] In the embodiments of this disclosure, the outer jacket can be considered as a stretched body, with the stretching direction being axial. The cross-section perpendicular to the axial direction is the cross section, and the circumferential direction of the cross section is the circumferential direction. The stretching can be constant-diameter stretching (e.g., stretching a circle into a cylinder) or variable-diameter stretching (e.g., stretching a circle into a cone, frustum, or variable-diameter cylinder). The cross section of the outer jacket can be circular, or it can be elliptical, rectangular, rounded rectangle, etc. For example, in Figure 1, the up-down direction is the stretching direction, i.e., the axial direction.

[0018] In embodiments of this disclosure, the interior of the outer jacket forms a cavity. In embodiments of this disclosure, "inner" refers to the direction toward the center of the cavity, and "outer" refers to the direction away from the center of the cavity.

[0019] The technical solution of this disclosure will be described in more detail below with reference to the accompanying drawings.

[0020] Figure 1 is a perspective view of a jacket according to an exemplary embodiment of the present disclosure. Figure 2 is a cross-sectional view of the jacket in Figure 1.

[0021] As shown in Figure 1, the outer casing 1 is cylindrical in shape. In an optional embodiment, as shown in Figure 1, the outer casing 1 may include a thinner portion (e.g., the lower part in Figure 1) and a thicker portion (e.g., the upper part in Figure 1). The bottom of the thinner portion (i.e., the lower end of the outer casing 1) may be provided with a needle outlet 14 (see Figure 2), and the thicker portion (i.e., the upper end of the outer casing 2) may be used to assemble the button 3 (see Figures 5-8).

[0022] In an optional embodiment, the cross-section of the outer sleeve 1 can be elliptical. The space corresponding to the two ends of the major axis of the ellipse can be used to accommodate a pair of extension arms 32 of the button 3 (see Figure 4), which helps to reduce the volume of the blood collection needle.

[0023] In an optional embodiment, as shown in FIG1, the cross-sectional area of ​​the outer jacket 1 gradually decreases from the upper end to the lower end of the outer jacket 1. Here, cross-sectional area refers to the area of ​​the planar shape defined by the outer contour of the cross-section. It should be noted that while the cross-sectional area gradually decreases, portions with equal cross-sectional areas are permissible; for example, the cross-sectional areas of the thicker portions may be substantially the same.

[0024] As shown in Figure 2, the inner wall of the outer jacket 1 is provided with an inwardly protruding first stop platform 11, which extends a certain length along the circumference of the outer jacket 1.

[0025] In an optional embodiment, as shown in FIG2, the inner wall of the outer jacket 1 is further provided with an inwardly protruding second stop platform 12. The second stop platform 12 extends a certain length along the circumference of the outer jacket 1. The first stop platform 11 and the second stop platform 12 are spaced a certain distance apart in the circumference of the outer jacket 1. The first stop platform 11 is closer to the upper end of the outer jacket 1 than the second stop platform 12.

[0026] In an optional embodiment, as shown in FIG2, the inner wall of the outer jacket 1 is further provided with an inwardly protruding anti-rotation platform 13. The anti-rotation platform 13 extends a certain distance along the axial direction of the outer jacket and is closer to the upper end of the outer jacket 1 than the first stop platform 11. The anti-rotation platform 13 is used to prevent the stop rib 21 from rotating in the first circumferential direction (exemplarily, see the right half of FIG6, the first circumferential direction is counterclockwise).

[0027] In an optional embodiment, as shown in FIG2, the inner wall of the outer sleeve 1 may be provided with a protrusion 10. The aforementioned first stop platform 11, second stop platform 12 and anti-rotation platform 13 are all provided on the inner surface of the protrusion 10.

[0028] In an optional embodiment, as described above, the cross-sectional area of ​​the outer jacket 1 gradually decreases from its upper end to its lower end, and correspondingly, the thickness of the protrusion 10 gradually decreases. This gradual decrease in the thickness of the protrusion 10 helps to provide space for the first stop platform 11, the second stop platform 12, and the anti-rotation platform 13, ensuring the platform area of ​​the aforementioned structure.

[0029] In an optional embodiment, the number of protrusions 10 can be multiple, such as two (exemplarily, one protrusion 10 is shown in FIG. 2, and another protrusion 10 is provided in the cut-out portion), and each protrusion 10 is provided with a corresponding first stop platform 11, second stop platform 12, and anti-rotation platform 13. The above-mentioned multiple protrusions 10 can be evenly arranged along the circumference of the outer jacket 1.

[0030] In an optional embodiment, as shown in FIG2, the inner wall of the outer sleeve 1 is further provided with a guide rib 15, and an axial guide structure can be formed between the guide rib 15 and the protrusion 10 to guide the axial movement of the extension arm 32 of the button 3 (see FIG4). Exemplarily, a sliding protrusion can be provided on the outer side of the extension arm 32, and the sliding protrusion can slide in the guide structure of the outer sleeve 1.

[0031] Figure 3 is a perspective view of a needle core according to an exemplary embodiment of the present disclosure.

[0032] As shown in Figure 3, the needle core 2 is adapted to be assembled inside the outer sleeve 1 (see Figures 5-8), with its lower end close to the needle outlet 14 (see Figures 5 and 8). A needle tip 23 is provided at the lower end of the needle core 2 (see Figures 6-8). A stop rib 21 and a drive rib 22 are provided on the outer wall of the needle core 2. The stop rib 21 is closer to the needle tip 23 than the drive rib 22. The stop rib 21 is adapted to contact the first stop platform 11 (see Figure 6).

[0033] In embodiments of this disclosure, the axial positions of the stop rib 21 and the drive rib 22 can be interchanged. For example, although not shown, the stop rib 21 can be closer to the upper end of the needle core 2 relative to the drive rib 22.

[0034] In an optional embodiment, as shown in FIG3, the driving rib 22 is a cylindrical protrusion. When the driving rib 22 contacts the driving surface 34 (see FIG7), the cylindrical shape helps to reduce the contact area between the two, thereby reducing the frictional resistance when the driving rib 22 drives the needle core 2 to rotate. In other embodiments, although not shown, the driving rib 22 may be of other shapes.

[0035] In an optional embodiment, the protruding positions of the stop rib 21 and the drive rib 22 differ by 90° in the circumferential direction. Further optionally, they may differ by other non-zero angles, or by 0°. When the protruding positions of the stop rib 21 and the drive rib 22 differ by 0° in the circumferential direction, the stop rib 21 and the drive rib 22 can be an integral structure.

[0036] In an optional embodiment, as shown in FIG3, a needle cap 24 is provided at the lower end of the needle core 2. The needle cap 24 is used to cover and protect the needle tip 23 (see FIG6-FIG8). The needle cap 24 includes a first part adapted to be fitted inside the outer sleeve 1 and a second part located outside the outer sleeve 1 (see FIG5).

[0037] In an optional embodiment, as shown in FIG3, the outer wall of the needle cap 24 is provided with an outwardly protruding boss 25. The boss 25 is adapted to abut against the inner end face of the lower end of the outer sleeve 1 (see FIG5).

[0038] In an optional embodiment, the needle outlet 14 can be elliptical (see the right half of Figure 7). When the boss 25 is aligned with the minor axis of the elliptical needle outlet, the boss 25 abuts against the inner end face of the lower end of the outer sleeve 1. When the boss 25 is aligned with the major axis of the elliptical needle outlet, the boss 25 can pass through the needle outlet.

[0039] Figure 4 is a perspective view of a button according to an exemplary embodiment of the present disclosure.

[0040] As shown in Figure 4, the key 3 is adapted to be mounted on the upper end of the outer casing 1 (see Figures 5-8), and includes a keycap 31 and an extension. In Figure 4, the extension is specifically an extension arm 32. In other embodiments, although not shown, the extension may be in other forms besides an arm, such as a cylindrical shape. The extension arm 32 is located on the side of the keycap 31 facing the pin outlet 14 (see Figures 5-8, i.e., the lower side). An inwardly protruding drive bump 33 is provided on the inner side of the extension arm 32, and one side of the drive bump 33 forms a drive surface 34.

[0041] In an optional embodiment, as shown in FIG4, the driving surface 34 is a plane inclined relative to the cross-section of the outer sleeve 1. In other embodiments, although not shown, the driving surface 34 may be other forms, such as a curved surface. Referring to FIG7, the axial movement of the button 3 can be converted into the circumferential rotation of the needle core 2 by the cooperation of the driving surface 34 and the driving rib 22.

[0042] In an optional embodiment, as shown in FIG4, an inwardly protruding anti-rotation protrusion 35 is further provided on the inner side of the extension arm 32. The anti-rotation protrusion 35 is closer to the lower end relative to the drive protrusion 33. One side of the anti-rotation protrusion 35 forms an anti-rotation surface 36. The anti-rotation surface 36 is used to prevent the drive rib 22 from rotating in the second circumferential direction before the drive surface 34 contacts the drive rib 22 (exemplarily, see the right half of FIG6, the second circumferential direction is clockwise).

[0043] In an optional embodiment, the number of extension arms 32 can be multiple (exemplarily, two in FIG. 4), and the multiple extension arms 32 can be evenly arranged along the circumference of the outer sleeve 1. Each extension arm 32 is provided with a corresponding drive protrusion 33 and anti-rotation protrusion 35.

[0044] In an optional embodiment, as shown in FIG4, the top of the keycap 31 is for the operator to press, and the bottom of the keycap 31 is provided with a central protrusion 37. As shown in the right half of FIG7, the central protrusion 37 is used to press down the upper end of the needle core 2 during firing.

[0045] In the embodiments of this disclosure, as shown in Figures 5-8, a launching spring 41 is also provided between the button 3 and the needle core 2, and a reset spring 42 is also provided between the needle core 2 and the inner end face of the lower end of the outer sleeve 1.

[0046] Figure 5 is a schematic diagram of a blood collection needle in an assembled state according to an exemplary embodiment of the present disclosure.

[0047] As shown in Figure 5, in the assembled state, the keycap 24 is connected to the needle core 2, the boss 25 of the keycap 24 abuts against the inner end face of the lower end of the outer sleeve 1, and the upper end of the keycap 24 pushes the needle core 2 upward, so that the stop rib 21 is spaced a certain distance from the first stop platform 11. At this time, the launching spring 41 has a large compression. The above state can be applied to the packaging and transportation of blood collection needles.

[0048] Figure 6 is a schematic diagram of a blood collection needle in a ready-to-fire state according to an exemplary embodiment of the present disclosure. Based on the state shown in Figure 5, the operator can rotate the keycap 24 so that the boss 25 of the keycap 24 is aligned with the long axis of the needle outlet 14, thereby removing the keycap 24 from the needle core 2 and taking it out of the outer sleeve 1, so that the blood collection needle becomes the ready-to-fire state shown in Figure 6.

[0049] As shown in the left half of Figure 6, without the support of the keycap 24, the needle core 2 moves axially downward a certain distance under the action of the launching spring 41 until the stop rib 21 of the needle core 2 contacts the first stop platform 11 of the outer sleeve 1. The first stop platform 11 blocks the stop rib 21, so that the needle core 2 cannot continue to move downward.

[0050] In the axial direction, as shown in the right half of Figure 6, in this state, the driving protrusion 33 and the driving rib 22 are spaced a certain distance apart.

[0051] In the circumferential direction, as shown in the right half of Figure 6, the driving rib 22 of the needle core 2 contacts or approaches the anti-rotation protrusion 35 (and anti-rotation surface 36) of the button 3. Because the circumferential position of the button 3 is restricted (see the previous description, the extension arm 32 of the button 3 is circumferentially limited by the guide structure of the outer sleeve 1), the clockwise rotation of the needle core 2 is blocked. Simultaneously, the stop rib 21 of the needle core 2 contacts or approaches the anti-rotation platform 13 of the outer sleeve 1, thus blocking the counterclockwise rotation of the needle core 2. Therefore, during the downward movement of the button 3, before the driving surface 34 contacts the driving rib 22, the circumferential rotation of the needle core 2 is restricted, and the driving surface 34 and the driving rib 22 remain circumferentially aligned, ensuring that the driving surface 34 can smoothly contact the driving rib 22. In addition, the anti-rotation surface 36 and the driving surface 34 are spaced a certain distance apart in the axial direction. After the driving surface 34 contacts the driving rib 22, the anti-rotation surface 36 no longer blocks the driving rib 22 of the needle core 2 due to its downward movement. The needle core 2 can rotate under the drive of the driving surface 34 to complete the firing.

[0052] Figure 7 is a schematic diagram of a blood collection needle during the firing process according to an exemplary embodiment of the present disclosure. Based on the diagram shown in Figure 6, the operator presses button 3, causing button 3 to move downwards to the state shown in Figure 7.

[0053] As shown in Figure 7, the driving protrusion 33 and the driving surface 34 are in contact with the driving rib 22. When the operator continues to press down button 3, the stop rib 21 is still in contact with the first stop platform 11 of the outer sleeve 1 (see Figure 6). The stop rib 21 cannot move downwards and can only rotate circumferentially under the action of the driving surface 34. When the stop rib 21 rotates to a sufficient angle, it disengages from the position blocked by the first stop platform 11, and the needle core 2 changes from rotation to axial downward movement, thus achieving the firing of the needle core 2.

[0054] Although not shown, those skilled in the art will understand that after the needle core 2 is fired, it does not continue to move downwards, but stops after contacting the second stop platform 12. At this time, the needle core 2 reaches the maximum firing distance, and the length of the needle tip 14 protruding from the outer sheath 1 is the puncture length of the blood collection needle.

[0055] Figure 8 is a schematic diagram of a blood collection needle after firing according to an exemplary embodiment of the present disclosure.

[0056] As shown in Figure 8, after the needle tip 14 reaches the puncture length, the return spring 42 causes the needle tip 14 to move upward, and finally the needle tip 14 retracts into the outer jacket 1 and finally stops inside the outer jacket 1, so as to avoid the needle tip 14 being exposed and causing danger.

[0057] In the above embodiments, the first stop platform, the second stop platform, and the anti-rotation platform are implemented by a protruding structure on the inner wall of the outer jacket. In other embodiments, the first stop platform, the second stop platform, and the anti-rotation platform can also be implemented by a recessed structure on the inner wall of the outer jacket.

[0058] In the embodiments of this disclosure, the relative positions of the driving surface and the anti-rotation surface in the axial direction, and the relative positions of the driving rib and the stop rib in the axial direction, can be set as needed.

[0059] In the embodiments of this disclosure, when there are multiple stop ribs and multiple first stop platforms, each stop rib cooperates with a corresponding first stop platform.

[0060] Based on the above, this disclosure proposes the following technical solution:

[0061] 1. A blood collection needle, comprising:

[0062] The outer jacket has a first end and a second end, the second end being provided with a needle outlet, and the inner wall of the outer jacket being provided with a first stop platform, the first stop platform extending a certain length along the circumference of the outer jacket;

[0063] The needle core is adapted to be assembled inside the outer sleeve. The end of the needle core near the needle outlet is provided with a needle tip. The outer wall of the needle core is provided with a stop rib and a drive rib. The stop rib is adapted to abut against the first stop platform in the axial direction.

[0064] A button, adapted to be pressed and mounted on the first end in the direction of the needle outlet, includes a keycap and an extension, the extension being located on the side of the keycap facing the needle outlet, and the extension being provided with a driving surface;

[0065] The driving surface is adapted to drive the driving rib to rotate circumferentially when the button moves toward the needle outlet, so that the stop rib disengages from the circumferential position blocked by the first stop platform to allow the needle core to move toward the needle outlet.

[0066] 2. The blood collection needle according to 1, wherein:

[0067] The inner wall of the outer jacket is also provided with a second stop platform, which extends a certain length along the circumference of the outer jacket. The first stop platform and the second stop platform are spaced a certain distance apart in the circumference of the outer jacket, and the first stop platform is closer to the first end than the second stop platform.

[0068] 3. The blood collection needle according to 1, wherein:

[0069] The inner wall of the outer jacket is also provided with an anti-rotation platform, which extends a certain distance along the axial direction of the outer jacket. The anti-rotation platform is closer to the first end than the first stop platform, and the anti-rotation platform is adapted to prevent the stop rib from rotating in the first circumferential direction.

[0070] 4. The blood collection needle according to 3, wherein:

[0071] The extension is also provided with an anti-rotation surface, which is axially spaced a certain distance from the driving surface. The anti-rotation surface is adapted to prevent the driving rib from rotating along the second circumferential direction when the driving surface is not in contact with the driving rib.

[0072] 5. The blood collection needle according to 1, wherein:

[0073] The stop rib is closer to the needle tip than the drive rib.

[0074] 6. The blood collection needle according to 1, wherein:

[0075] The stop rib and the drive rib are an integral structure.

[0076] 7. The blood collection needle according to 1, wherein:

[0077] The driving rib is cylindrical.

[0078] 8. The blood collection needle according to 1, wherein:

[0079] The driving surface is an inclined plane that is tilted relative to the cross-section of the outer casing.

[0080] 9. The blood collection needle according to claim 1 further includes:

[0081] A launch spring is disposed between the button and the pin.

[0082] 10. The blood collection needle according to claim 1 further includes:

[0083] A return spring is disposed between the needle core and the second end of the outer sleeve.

[0084] 11. The blood collection needle according to 1, wherein:

[0085] The inner wall of the outer jacket is provided with a protrusion, and the first stop platform is formed on the protrusion.

[0086] 12. The blood collection needle according to 11, wherein:

[0087] From the first end to the second end, the cross-sectional area of ​​the outer jacket gradually decreases, and the thickness of the protrusion gradually decreases.

[0088] 13. The blood collection needle according to 1, wherein:

[0089] The number of the first stop platform and / or the stop rib is multiple, and the multiple first stop platforms and / or the multiple stop ribs are evenly arranged in the circumferential direction.

[0090] 14. The blood collection needle according to 1, wherein:

[0091] The extension includes multiple extension arms, which are evenly arranged in the circumferential direction.

[0092] 15. The blood collection needle according to claim 1 further includes:

[0093] A needle cap for covering the needle tip, the needle cap comprising a first portion adapted to be fitted inside the outer sheath and a second portion located outside the outer sheath.

[0094] 16. The blood collection needle according to 15, wherein:

[0095] The outer wall of the needle cap is provided with an outwardly protruding boss, which is adapted to abut against the inner end face of the second end of the outer sleeve;

[0096] When the boss abuts against the inner end face of the second end of the outer sleeve, the end of the first part abuts against the needle core, so that the stop rib and the first stop platform are spaced a certain distance apart.

[0097] 17. The blood collection needle according to 1, wherein:

[0098] The inner wall of the outer jacket is also provided with a guide structure, which is adapted to guide the extension to move axially.

[0099] 18. The blood collection needle according to 1, wherein:

[0100] The inner wall of the outer jacket is provided with a protrusion and a guide rib, and the first stop platform is formed on the protrusion. The protrusion and the guide rib together form the guide structure.

[0101] 19. The blood collection needle according to 1, wherein:

[0102] The first end of the outer sleeve is provided with a stop rib, which is adapted to prevent the keycap from moving toward the needle outlet.

[0103] It should be noted that the above technical solutions can be combined arbitrarily where logically possible, and all are within the scope of protection of this disclosure. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0104] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0105] Although embodiments of the present disclosure have been shown and described, it will be understood by those skilled in the art that variations and combinations of elements may be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blood collection needle, comprising: The outer jacket has a first end and a second end, the second end being provided with a needle outlet, and the inner wall of the outer jacket being provided with a first stop platform, the first stop platform extending a certain length along the circumference of the outer jacket; The needle core is adapted to be assembled inside the outer sleeve. The end of the needle core near the needle outlet is provided with a needle tip. The outer wall of the needle core is provided with a stop rib and a drive rib. The stop rib is adapted to abut against the first stop platform in the axial direction. A button, adapted to be pressed and mounted on the first end in the direction of the needle outlet, includes a keycap and an extension, the extension being located on the side of the keycap facing the needle outlet, and the extension being provided with a driving surface; The driving surface is adapted to drive the driving rib to rotate circumferentially when the button moves toward the needle outlet, so that the stop rib disengages from the circumferential position blocked by the first stop platform to allow the needle core to move toward the needle outlet.

2. The blood collection needle according to claim 1, wherein: The inner wall of the outer jacket is also provided with a second stop platform, which extends a certain length along the circumference of the outer jacket. The first stop platform and the second stop platform are spaced a certain distance apart in the circumference of the outer jacket, and the first stop platform is closer to the first end than the second stop platform.

3. The blood collection needle according to claim 1, wherein: The inner wall of the outer jacket is also provided with an anti-rotation platform, which extends a certain distance along the axial direction of the outer jacket. The anti-rotation platform is closer to the first end than the first stop platform, and the anti-rotation platform is adapted to prevent the stop rib from rotating in the first circumferential direction.

4. The blood collection needle according to claim 3, wherein: The extension is also provided with an anti-rotation surface, which is axially spaced a certain distance from the driving surface. The anti-rotation surface is adapted to prevent the driving rib from rotating along the second circumferential direction when the driving surface is not in contact with the driving rib.

5. The blood collection needle according to claim 1, wherein: The stop rib is closer to the needle tip than the drive rib.

6. The blood collection needle according to claim 1, wherein: The stop rib and the drive rib are an integral structure.

7. The blood collection needle according to claim 1, wherein: The driving rib is cylindrical.

8. The blood collection needle according to claim 1, wherein: The driving surface is an inclined plane that is tilted relative to the cross-section of the outer casing.

9. The blood collection needle according to claim 1, further comprising: A launch spring is disposed between the button and the pin.

10. The blood collection needle according to claim 1, further comprising: A return spring is disposed between the needle core and the second end of the outer sleeve.

11. The blood collection needle according to claim 1, wherein: The inner wall of the outer jacket is provided with a protrusion, and the first stop platform is formed on the protrusion.

12. The blood collection needle according to claim 11, wherein: From the first end to the second end, the cross-sectional area of ​​the outer jacket gradually decreases, and the thickness of the protrusion gradually decreases.

13. The blood collection needle according to claim 1, wherein: The number of the first stop platform and / or the stop rib is multiple, and the multiple first stop platforms and / or the multiple stop ribs are evenly arranged in the circumferential direction.

14. The blood collection needle according to claim 1, wherein: The extension includes multiple extension arms, which are evenly arranged in the circumferential direction.

15. The blood collection needle according to claim 1, further comprising: A needle cap for covering the needle tip, the needle cap comprising a first portion adapted to be fitted inside the outer sheath and a second portion located outside the outer sheath.

16. The blood collection needle according to claim 15, wherein: The outer wall of the needle cap is provided with an outwardly protruding boss, which is adapted to abut against the inner end face of the second end of the outer sleeve; When the boss abuts against the inner end face of the second end of the outer sleeve, the end of the first part abuts against the needle core, so that the stop rib and the first stop platform are spaced a certain distance apart.

17. The blood collection needle according to claim 1, wherein: The inner wall of the outer jacket is also provided with a guide structure, which is adapted to guide the extension to move axially.

18. The blood collection needle according to claim 1, wherein: The inner wall of the outer jacket is provided with a protrusion and a guide rib, and the first stop platform is formed on the protrusion. The protrusion and the guide rib together form the guide structure.

19. The blood collection needle according to claim 1, wherein: The first end of the outer sleeve is provided with a stop rib, which is adapted to prevent the keycap from moving toward the needle outlet.

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