A needle core rotating type tail pressing blood collector

Abstract

A needle core rotating type tail pressing blood collector includes a shell, a needle core and a tail cover. One of the shell and the tail cover is provided with an elastic arm, and the other is provided with a driving arm for driving the elastic arm to deform; the elastic arm is provided with a first stop surface for limiting rotation of the needle core, and the driving arm is provided with a second stop surface for limiting rotation of the needle core; a front part in the shell is provided with a third stop surface for limiting launching of the needle core; a first inclined surface for driving the needle core to rotate is protruded in the tail cover; a second inclined surface for promoting the elastic arm to deform is protruded in the shell or the tail cover provided with the driving arm; a hook corresponding to the tail cover in the shell is provided with an inner reverse buckle, and the tail cover is not reset after the needle core is launched. The application is characterized in that, through the design of the elastic arm and the driving arm, after the needle core is launched, the elastic arm cannot be opened again to make room, so that the reliability of one-time use of the product is greatly higher than that of the prior art, the safety is higher, and the application prospect is better.

Description

Technical Field

[0001] This invention relates to the field of medical blood collection devices, specifically to a needle core rotating tail-press blood collection device. Background Technology

[0002] Among medical blood collection devices, disposable blood collection devices are popular among medical staff and patients due to their small size, safety, and ease of use, and are currently widely used in various medical institutions and among diabetic patients. These devices have a built-in ejection mechanism, a compact structure, and are designed for single use only, making them both safe and convenient, thus possessing strong market development potential.

[0003] Existing blood collection devices typically employ a method where pressing a sliding sleeve that directly contacts the patient's skin causes the needle core to be launched under spring pressure, and then the needle tip punctures the skin's extremities to collect blood. However, the launch of the needle core in existing blood collection needles is unstable, easily causing needle tip deviation, reduced or excessive launch force, resulting in abnormal blood collection and harm to the patient. Furthermore, existing blood collection devices are not compact enough, involve relatively many parts, and have a complex assembly process. Summary of the Invention

[0004] The purpose of this invention is to provide a needle core rotating tail compression blood collection device to solve one or more of the above-mentioned problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A needle-core rotating tail-press blood collection device includes a housing, a needle core, and a tail cap; an ejection cavity is formed inside the housing, the needle core is located inside the ejection cavity, and the tail cap is installed at the tail of the housing. In the ready-to-launch state, the needle core is locked between the housing and the tail cap.

[0007] The tail cap serves as a button on the tail-mounted press-type firing structure to unlock the needle core from its locked state; after unlocking, the needle core is driven to rotate and enters a firing channel inside the housing to fire.

[0008] Among them, the outer shell and the tail cap are provided with an elastic arm and a driving arm for driving the elastic arm to deform. The elastic arm extends along the puncture direction of the blood collection device and the tail end of the elastic arm corresponds to the driving arm.

[0009] The tail end of the elastic arm is provided with a first stop surface that limits the rotation of the needle core in a first direction, and the front end of the drive arm is provided with a second stop surface that limits the rotation of the needle core in a second direction; the front part inside the housing is provided with a third stop surface that limits the emission of the needle core, and the third stop surface and the emission channel are arranged sequentially inside the housing in the rotation direction of the needle core.

[0010] The tail cap is further provided with a first inclined surface for driving the needle core to rotate in a first direction; the outer shell or the tail cap provided with the driving arm is provided with a second inclined surface for causing the elastic arm to deform; the first inclined surface abuts against the tail of the needle core, and the second inclined surface abuts against the tail end of the elastic arm.

[0011] In the above scheme, the functions of the flexible arm and the drive arm are as follows:

[0012] Under normal conditions, the elastic arm limits the rotation direction of the needle core, preventing the needle core from rotating from the ready-to-fire position to the firing position (i.e., the firing channel).

[0013] The elastic arm can deform under the drive of the drive arm, releasing the restriction on the rotation of the needle core and allowing the needle core to enter the firing position.

[0014] In a further technical solution, the elastic arm is disposed inside the outer casing, the drive arm is disposed in the tail cover, and the second inclined surface is disposed in the tail cover.

[0015] In a further technical solution, the elastic arm is disposed in the tail cover, the drive arm is disposed in the housing, and the second inclined surface is disposed in the housing.

[0016] In a further technical solution, both the elastic arm and the drive arm are provided in pairs.

[0017] In a further technical solution, the needle core is provided with a first protruding rib for limiting the position laterally. Before the needle core is unlocked, the first protruding rib abuts against the first stop surface of the elastic arm.

[0018] In a further technical solution, the tail end of the elastic arm is provided with a contact plane. When the tail cap is pressed down, the second inclined surface abuts against and squeezes the contact plane, forcing the tail end of the elastic arm to open outward, making way for the rotation of the needle core, and the needle core is unlocked.

[0019] A further technical solution is provided, wherein a limiting stop is laterally protruded on the needle core, and before the needle core is fired, the limiting stop abuts against the third stop of the outer shell; when the needle core is fired, the needle core is rotated to release the abutment between the limiting stop and the third stop, and enters the firing channel on the side of the third stop.

[0020] In a further technical solution, a second rib for rotation is provided laterally on the needle core. When the tail cap is pressed down, the first inclined surface abuts against and squeezes the second rib, forcing the needle core to rotate in the first direction.

[0021] In a further technical solution, the second stop and the second inclined surface are an integral structure.

[0022] A further technical solution also includes a launch spring and a return spring. The launch spring acts between the needle core and the tail cap to keep the needle core in a launching tendency; the return spring acts between the needle core and the outer shell to keep the needle core in a returning tendency.

[0023] In a further technical solution, the outer shell consists of a body and a launch depth adjustment ring, the latter being coaxially sleeved on the front end of the former and rotatably positioned relative to the former.

[0024] The firing depth adjustment ring has multiple adjustment steps inside, which are raised step by step along the axial direction. When the firing depth adjustment ring rotates, the firing depth of the needle core is adjusted by the adjustment steps at different depth positions abutting against the limiting stop surface of the needle core.

[0025] In a further technical solution, the front end of the main body is provided with an inverted buckle, and the end face of the emission depth adjustment ring is provided with an arc-shaped groove. The inverted buckle is slidably positioned in the arc-shaped groove, thereby forming a rotational assembly between the emission depth adjustment ring and the main body.

[0026] In a further technical solution, the tail cap is slidably fitted onto the outer shell. After the needle core is fired, the tail cap and the outer shell are locked together by a locking structure, so that the tail cap remains in the outer shell and does not reset.

[0027] A further technical solution is provided with a hook on the tail cap; the outer shell has an inner buckle corresponding to the hook on the tail cap. After the needle core is fired, the hook and the inner buckle lock together to form the locking structure.

[0028] The working principle and advantages of this invention are as follows:

[0029] The present invention provides a needle core rotating tail-pressing blood collection device. In use, by pressing the tail cap, the needle core is driven to rotate and enter the firing channel before firing puncture.

[0030] The main feature of this invention is that an elastic arm is provided in one of the outer shell and the tail cap, and a driving arm for deforming the elastic arm is provided in the other. In the initial state of the blood collection device, the needle core is limited by the elastic arm and cannot rotate. To fire the needle core, the driving arm must first force the elastic arm to open, releasing the rotation limitation on the needle core. Only then can the needle core rotate into the firing channel to complete the firing, ensuring the stability of the needle core during puncture and effectively reducing puncture pain.

[0031] This invention features a compact structure, utilizing the elastic arms and drive arms on the tail cap and outer shell to launch the needle core. It uses fewer parts and simplifies the assembly process. For a small product like a blood collection device, the reduction in parts significantly lowers assembly costs and difficulty, and can improve the product yield, ensuring reliability.

[0032] The needle core of this invention moves linearly within the firing channel inside the outer casing during firing, thereby ensuring firing stability.

[0033] Furthermore, after the tail cap is pressed and the needle core is launched, the tail cap and the outer shell are locked together and cannot be ejected and reset. At this time, the drive arm cannot drive the elastic arm to open and make way again. Therefore, the needle core can only remain in the launch channel and cannot return to its original ready-to-launch position, ensuring its single-use design requirement.

[0034] In summary, compared with the prior art, the blood collection device of the present invention not only meets the requirement of single use, but more importantly, the ingenious design of the elastic arm and the drive arm ensures the absolute single use of the product without increasing the additional production cost. In other words, the reliability of the single use of the blood collection device of the present invention is much higher than that of the locking design of the prior art, thus it is safer and has greater application prospects. Attached Figure Description

[0035] Appendix Figure 1 This is a schematic diagram of the structure in the initial state of Embodiment 1 of the present invention;

[0036] Appendix Figure 2 This is an exploded view of Embodiment 1 of the present invention;

[0037] Appendix Figure 3 The three-dimensional shell of Embodiment 1 of the present invention Figure 1 (Looking up from below)

[0038] Appendix Figure 4 The three-dimensional shell of Embodiment 1 of the present invention Figure 2 (Looking up from below)

[0039] Appendix Figure 5 This is a top view of the tail cap in Embodiment 1 of the present invention;

[0040] Appendix Figure 6 This is a perspective view (top view) of the tail cover in Embodiment 1 of the present invention.

[0041] Appendix Figure 7 This is a side view of the tail cap in Embodiment 1 of the present invention;

[0042] Appendix Figure 8This is a perspective view of the needle core in Embodiment 1 of the present invention;

[0043] Appendix Figure 9 This is a top view (head view) of the needle core in Embodiment 1 of the present invention.

[0044] Appendix Figure 10 This is a bottom view (tail view) of the needle core in Embodiment 1 of the present invention.

[0045] Appendix Figure 11 This is a perspective view (from below) of the initial state after removing the tail cap in Embodiment 1 of the present invention.

[0046] Appendix Figure 12 This is a perspective view (from below) of the tail cover portion in its initial state according to Embodiment 1 of the present invention.

[0047] Appendix Figure 13 This is a perspective view of the overall side portion in the initial state of Embodiment 1 of the present invention.

[0048] Appendix Figure 14 This is a bottom view of the tail cover portion in its initial state according to Embodiment 1 of the present invention.

[0049] Appendix Figure 15 The initial view of Embodiment 1 of the present invention is shown from below. Figure 1 ;

[0050] Appendix Figure 16 for Figure 15 Sectional view along axis AA;

[0051] Appendix Figure 17 The initial view of Embodiment 1 of the present invention is shown from below. Figure 2 ;

[0052] Appendix Figure 18 for Figure 17 BB-direction sectional view;

[0053] Appendix Figure 19 This is a perspective view of the overall side section during step 1 of Embodiment 1 of the present invention.

[0054] Appendix Figure 20 This is a bottom view of the tail cover portion during step 1 of embodiment 1 of the present invention.

[0055] Appendix Figure 21 This is a sectional view along line AA in step 1 of Embodiment 1 of the present invention;

[0056] Appendix Figure 22 This is a BB-direction cross-sectional view of step 1 in Embodiment 1 of the present invention;

[0057] Appendix Figure 23 This is a bottom view of the tail cover portion during step 2 of Embodiment 1 of the present invention.

[0058] Appendix Figure 24 This is a sectional view along line AA in step 2 of Embodiment 1 of the present invention;

[0059] Appendix Figure 25 This is a BB-direction cross-sectional view of step 2 in Embodiment 1 of the present invention;

[0060] Appendix Figure 26 This is a bottom view of the tail cover portion during step 3 of Embodiment 1 of the present invention.

[0061] Appendix Figure 27 This is a sectional view along line AA in step 3 of Embodiment 1 of the present invention;

[0062] Appendix Figure 28 This is a BB-direction cross-sectional view of step 3 in Embodiment 1 of the present invention;

[0063] Appendix Figure 29 This is a sectional view along line AA in step 4 of Embodiment 1 of the present invention;

[0064] Appendix Figure 30 This is a BB-direction cross-sectional view of step 4 in Embodiment 1 of the present invention;

[0065] Appendix Figure 31 This is a sectional view along line AA in step 5 of Embodiment 1 of the present invention;

[0066] Appendix Figure 32 This is a BB-direction cross-sectional view of step 5 in Embodiment 1 of the present invention;

[0067] Appendix Figure 33 This is an exploded view of Embodiment 2 of the present invention;

[0068] Appendix Figure 34 This is a perspective view (from below) of the outer shell in Embodiment 2 of the present invention.

[0069] Appendix Figure 35 This is a perspective view (from below) of the tail cover in Embodiment 2 of the present invention.

[0070] Appendix Figure 36 The three-dimensional shape of the needle core in Embodiment 2 of the present invention Figure 1 (Front-side view);

[0071] Appendix Figure 37 The three-dimensional shape of the needle core in Embodiment 2 of the present invention Figure 2 (Rear view);

[0072] Appendix Figure 38 This is a top view (head view) of the needle core in Embodiment 2 of the present invention.

[0073] Appendix Figure 39This is a bottom view (tail view) of the needle core in Embodiment 2 of the present invention.

[0074] Appendix Figure 40 This is a perspective view of the overall side portion in the initial state of Embodiment 2 of the present invention;

[0075] Appendix Figure 41 This is a bottom view of the tail cover portion in its initial state according to Embodiment 2 of the present invention.

[0076] Appendix Figure 42 This is a perspective view of the side section of the entire structure after the needle core torsion handle is unscrewed in Embodiment 2 of the present invention.

[0077] Appendix Figure 43 This is a bottom view of the tail cap portion after the needle core torsion handle has been unscrewed, according to Embodiment 2 of the present invention.

[0078] Appendix Figure 44 This is a longitudinal sectional perspective view of the end cap after pressing in Embodiment 2 of the present invention;

[0079] Appendix Figure 45 This is a schematic longitudinal cross-sectional view of the end cap after pressing in Embodiment 2 of the present invention;

[0080] Appendix Figure 46 This is a longitudinal cross-sectional view of the needle core during core puncture in Embodiment 2 of the present invention;

[0081] Appendix Figure 47 This is a bottom view of the tail cap portion during needle core puncture in Embodiment 2 of the present invention;

[0082] Appendix Figure 48 This is a perspective view of Embodiment 3 of the present invention;

[0083] Appendix Figure 49 This is a perspective view of the outer shell body in Embodiment 3 of the present invention;

[0084] Appendix Figure 50 This is a three-dimensional representation of the launch depth adjustment ring in Embodiment 3 of the present invention. Figure 1 (From a front-end perspective);

[0085] Appendix Figure 51 This is a three-dimensional representation of the launch depth adjustment ring in Embodiment 3 of the present invention. Figure 2 (Backend perspective);

[0086] Appendix Figure 52 This is a perspective view of the outer shell in Embodiment 3 of the present invention;

[0087] Appendix Figure 53 This is a bottom view of the outer casing in Embodiment 3 of the present invention;

[0088] Appendix Figure 54 for Figure 53 A sectional view along the AA direction.

[0089] In the attached diagrams: 1. Outer shell; 2. Needle core; 3. Tail cap; 4. Return spring; 5. Launch spring; 11. Elastic arm; 111. First stop surface; 112. Contact plane; 12. Third stop surface; 121. Adjustment step surface; 13. Launch channel; 14. Inner buckle; 141. Extrusion slope; 15. Buckle; 16. Launch depth adjustment ring; 161. Arc-shaped groove; 10. Body; 101. Buckle; 21. Torque handle; 22. Torque handle stop block; 23. Limiting stop surface; 24. Second rib; 25. First rib; 30. Drive arm; 31. First slope surface; 32. Second slope surface; 33. Second stop surface; 34. Hook; 341. Guide slope surface. Implementation

[0090] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0091] The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the embodiments of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0092] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0093] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0094] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0095] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0096] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0097] The terms “front,” “back,” “up,” and “down” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not used to limit the specific direction of the protection scheme and its actual implementation. Example

[0098] See appendix Figure 1 , 2 As shown, a needle-core rotating tail-press blood collection device includes a housing 1, a needle core 2, and a tail cap 3.

[0099] An ejection cavity is formed inside the outer shell 1, the needle core 2 is located inside the ejection cavity, and the tail cover 3 is installed at the tail of the outer shell 1. In the ready-to-launch state, the needle core 2 is locked between the outer shell 1 and the tail cover 3.

[0100] The tail cap 3 serves as a button on the tail-pressable firing structure to unlock the locked state of the needle core 2. After unlocking, the needle core 2 is driven to rotate in the first direction (such as clockwise) and enters a firing channel 13 inside the outer shell 1 to achieve firing. The firing channel 13 is set along the length of the outer shell 1.

[0101] like Figure 3 , 4 As shown, the outer casing 1 is provided with a pair of elastic arms 11, which extend along the length of the outer casing 1, and the tail end of the elastic arm 11 is a free end corresponding to the tail cap 3; the front end of the elastic arm 11 is a fixed end, which is connected to the inner wall of the outer casing 1. The tail end of the elastic arm 11 is naturally inclined inward, and maintains the locking of the needle core 2 in the initial state.

[0102] like Figures 5-7 As shown, the tail cap 3 has a pair of driving arms 30 protruding towards the outer shell 1 for driving the elastic arm 11 to deform (open outward). The driving arms 30 extend along the puncture direction of the blood collection device and correspond to the tail end of the elastic arm 11 in the outer shell 1.

[0103] The tail end of the elastic arm 11 is provided with a first stop surface 111 that limits the rotation of the needle core 2 in a first direction. The front end of the drive arm 30 is provided with a second stop surface 33 that limits the rotation of the needle core 2 in a second direction (e.g., counterclockwise). The front part inside the outer shell 1 is provided with a third stop surface 12 that limits the firing of the needle core 2. The needle core 2 is kept locked in a locked state by these three stop surfaces. Specifically, when the needle core 2 is in the firing state, the first stop surface 111 and the second stop surface 33 limit the needle core 2 in the clockwise and counterclockwise rotation directions, respectively; the third stop surface 12 limits the front part of the needle core 2 in the firing direction before the needle core 2 is fired (after unscrewing the handle 21).

[0104] Preferred, such as Figures 8-10 As shown, the needle core 2 is provided with a first protruding rib 25 for limiting the position laterally. In the initial state, the first protruding rib 25 abuts against the first stop surface 111 of the elastic arm 11.

[0105] The tail cap 3 further includes a first inclined surface 31 for driving the needle core 2 to rotate in a first direction and a second inclined surface 32 for causing the elastic arm 11 to deform. The first inclined surface 31 abuts against the tail of the needle core 2, and its inclination direction corresponds to the first direction of rotation of the needle core 2. The second inclined surface 32 abuts against the tail end of the elastic arm 11, and its inclination direction corresponds to the thickness direction of the elastic arm 11.

[0106] Preferably, the tail end of the elastic arm 11 is provided with a contact plane 112. When the tail cover 3 is pressed down, the second inclined surface 32 abuts against and presses against the contact plane 112, forcing the tail end of the elastic arm 11 to open outward. At this time, the first stop surface 111 releases the restriction on the needle core 2, making way for the rotation of the needle core 2, and the needle core 2 is unlocked.

[0107] Preferably, the needle core 2 is provided with a limiting stop surface 23 protruding laterally. Before the needle core 2 is unlocked, the limiting stop surface 23 abuts against the third stop surface 12 of the outer shell 1. When the needle core 2 is unlocked, the needle core 2 is rotated to release the abutment between the limiting stop surface 23 and the third stop surface 12 and enters the emission channel 13 on the side of the third stop surface 12.

[0108] In the rotation direction of the needle core 2, the third stop surface 12 and the emission channel 13 are arranged sequentially inside the outer casing 1.

[0109] Preferably, the needle core 2 is provided with a second rib 24 for rotation in a transverse direction. When the tail cap 3 is pressed down, the first inclined surface 31 abuts against and squeezes the second rib 24, forcing the needle core 2 to rotate in the first direction.

[0110] Preferably, the second stop surface 33 and the second inclined surface 32 can be an integral structure.

[0111] The outer shell 1 has an inner buckle 14 corresponding to the hook 34 of the tail cap 3. After the needle core 2 is fired, the hook 34 and the inner buckle 14 lock together, so that the tail cap 3 is kept in the outer shell 1 and does not reset.

[0112] The blood collection device of this embodiment also includes a launching spring 5 and a return spring 4. The launching spring 5 acts between the needle core 2 and the tail cap 3 to keep the needle core 2 in a forward launching tendency; the return spring 4 acts between the needle core 2 and the outer shell 1 to keep the needle core 2 in a retracting return tendency.

[0113] In this embodiment, the initial state of the blood collection device is as follows:

[0114] like Figures 11-18 As shown, the hook 34 on the outer edge of the front end of the tail cap 3 engages with the buckle 15 at the rear end of the outer casing 1, keeping the tail cap 3 in a connected state with the outer casing 1 (see...). Figure 18(at point III). The buckle 15 is located on the rear side of the inner buckle 14.

[0115] The head of the needle core 2 abuts against the firing port of the outer casing 1 via the torsion handle stop 22 (see...). Figure 16 (At point II), the tail end of the needle core 2 is elastically positioned in the tail cap 3 by the launching spring 5.

[0116] The elastic arm 11 in the outer casing 1 is in a naturally inwardly inclined state (see...). Figure 16 At point I), the first protruding rib 25 on the needle core 2 is located between the first stop surface 111 of the elastic arm 11 and the second stop surface 33 of the tail cap 3, at which point the main body of the needle core 2 cannot rotate.

[0117] In this embodiment, the steps for using the blood collection device may include:

[0118] Step 1, as follows Figures 19-22 As shown, firstly, the torsion handle 21 of the needle core 2 head is rotated, and under the action of the launching spring 5, the needle core 2 moves forward slightly (about 2mm). At this time, the first protruding rib 25 of the needle core 2 falls onto the contact plane 112 of the elastic arm 11 (see...). Figure 21 At point IV), while remaining between the first stop surface 111 of the elastic arm 11 and the second stop surface 33 of the tail cap 3, the limiting stop surface 23 of the needle core 2 abuts against the third stop surface 12 of the outer shell 1 (see Figure 22 At point V), the needle core 2 is unable to rotate or move forward;

[0119] Step 2, as follows Figures 23-25 As shown, pressing the tail cap 3 in the direction of the arrow causes the second inclined surface 32 of the tail cap 3 to open the elastic arm 11 through the contact plane 112 with the elastic arm 11, so that the first stop surface 111 on the elastic arm 11 makes way for the needle core 2, and the needle core 2 is released from the rotation limit (see...). Figure 24 At point VI), the first inclined surface 31 on the tail cap 3 contacts the second rib 24 on the needle core 2 (see... Figure 25 (at point VII)

[0120] Step 3, as follows Figures 26-28 As shown, by continuing to press the tail cap 3, the first inclined surface 31 of the tail cap 3 presses the second protruding rib 24 on the needle core 2, causing the needle core 2 to rotate clockwise and enter the firing channel 13; at the same time, the hook 34 of the tail cap 3 is compressed inward by the action of the pressing inclined surface 141 in the outer shell 1 during the forward movement of the tail cap 3 through the setting of the guide inclined surface 341, and rebounds outward after the tail cap 3 is pressed to the bottom, thus locking with the inner buckle 14 of the outer shell 1;

[0121] Step 4, as follows Figure 29 , 30As shown, under the action of the launching spring 5, the needle core 2 is launched forward to complete the blood collection puncture, and its stroke is limited by the launching port of the outer shell 1 (see...). Figure 30 (at point VIII)

[0122] Step 5, as follows Figure 31 , 32 As shown, under the action of the return spring 4, the needle core 2 retracts to a balanced position inside the outer casing 1. At this time, because the hook 34 on the outer edge of the front end of the tail cap 3 is locked with the inner snap 14 of the outer casing 1, the tail cap 3 no longer pops out (see...). Figure 32 (at point IX). Example

[0123] See appendix Figures 33-47 As shown, a needle-core rotating tail-press blood collection device differs from Embodiment 1 in that:

[0124] The positions of the drive arm 30 and the elastic arm 11 have been interchanged. The elastic arm 11 is located in the tail cover 3, and the drive arm 30 is located inside the outer shell 1. The second inclined surface 32 is located inside the outer shell 1.

[0125] The other parts are the same as in Embodiment 1, so they will not be described again here. Example

[0126] See appendix Figures 48-54 As shown, a needle-core rotating tail-press blood collection device differs from Embodiment 1 in that:

[0127] The outer shell 1 consists of a body 10 and a launch depth adjustment ring 16, the latter being coaxially sleeved on the front end of the former and rotatably arranged relative to the former.

[0128] The inner part of the emission depth adjustment ring 16 is provided with multiple adjustment step surfaces 121 around the axial direction, and each adjustment step surface 121 is raised step by step along the axial direction. When the emission depth adjustment ring 16 rotates, the emission depth of the needle core 2 is adjusted by rotating the adjustment step surfaces 121 at different depth positions to the front end of the emission channel 13 and abutting against the limiting stop surface 23 of the needle core 2.

[0129] Preferably, the front end of the body 10 is provided with an inverted buckle 101, and the end face of the emission depth adjustment ring 16 is provided with an arc-shaped groove 161. The inverted buckle 101 is slidably positioned in the arc-shaped groove 161, thereby forming a rotational assembly between the emission depth adjustment ring 16 and the body 10 (see...). Figure 54 (at point X).

[0130] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A needle-core rotating tail-press blood collection device, comprising a housing (1), a needle core (2), and a tail cap (3); characterized in that: An ejection cavity is formed inside the outer shell (1), the needle core (2) is located inside the ejection cavity, and the tail cap (3) is installed at the tail of the outer shell (1). In the ready-to-launch state, the needle core (2) is locked between the outer shell (1) and the tail cap (3). The tail cap (3) serves as a button on the tail-pressable firing structure to unlock the locking state of the needle core (2); after unlocking, the needle core (2) is driven to rotate and enters a firing channel (13) inside the outer shell (1) to fire; Among them, the outer shell (1) and the tail cap (3) are provided with an elastic arm (11) and a driving arm (30) for driving the elastic arm (11) to deform. The elastic arm (11) extends along the puncture direction of the blood collection device, and the tail end of the elastic arm (11) corresponds to the driving arm (30). The tail end of the elastic arm (11) is provided with a first stop surface (111) for limiting the needle core (2) to rotate in a first direction, and the front end of the drive arm (30) is provided with a second stop surface (33) for limiting the needle core (2) to rotate in a second direction; the front part inside the outer shell (1) is provided with a third stop surface (12) for limiting the emission of the needle core (2), and in the rotation direction of the needle core (2), the third stop surface (12) and the emission channel (13) are arranged sequentially inside the outer shell (1); The tail cap (3) is further provided with a first inclined surface (31) for driving the needle core (2) to rotate in a first direction; the outer shell (1) or the tail cap (3) provided with the driving arm (30) is provided with a second inclined surface (32) for causing the elastic arm (11) to deform; the first inclined surface (31) abuts against the tail of the needle core (2), and the second inclined surface (32) abuts against the tail end of the elastic arm (11).

2. The blood collection device according to claim 1, characterized in that: The elastic arm (11) is located inside the outer casing (1), the drive arm (30) is located in the tail cover (3), and the second inclined surface (32) is located in the tail cover (3).

3. The blood collection device according to claim 1, characterized in that: The elastic arm (11) is located in the tail cover (3), the drive arm (30) is located inside the outer shell (1), and the second inclined surface (32) is located inside the outer shell (1).

4. The blood collection device according to claim 1, 2, or 3, characterized in that: Both the elastic arm (11) and the drive arm (30) are provided in pairs.

5. The blood collection device according to claim 1, characterized in that: The needle core (2) is laterally protruded with a first protruding rib (25) for limiting the position. Before the needle core (2) is unlocked, the first protruding rib (25) abuts against the first stop surface (111) of the elastic arm (11).

6. The blood collection device according to claim 1, characterized in that: The end of the elastic arm (11) is provided with a contact plane (112). When the tail cover (3) is pressed down, the second inclined surface (32) abuts against and squeezes the contact plane (112), forcing the end of the elastic arm (11) to open outward, making way for the rotation of the needle core (2), and the needle core (2) is unlocked.

7. The blood collection device according to claim 1, characterized in that: The needle core (2) is provided with a limiting stop surface (23) protruding laterally. Before the needle core (2) is fired, the limiting stop surface (23) abuts against the third stop surface (12) of the outer shell (1). When the needle core (2) is fired, the needle core (2) is rotated to release the abutment between the limiting stop surface (23) and the third stop surface (12) and enters the firing channel (13) on the side of the third stop surface (12).

8. The blood collection device according to claim 1, characterized in that: The needle core (2) is laterally protruded with a second rib (24) for rotation. When the tail cap (3) is pressed down, the first inclined surface (31) abuts against and squeezes the second rib (24), forcing the needle core (2) to rotate in the first direction.

9. The blood collection device according to claim 1, characterized in that: It also includes a firing spring (5) and a return spring (4), wherein the firing spring (5) acts between the needle core (2) and the tail cap (3) to keep the needle core (2) in a firing tendency; and the return spring (4) acts between the needle core (2) and the outer shell (1) to keep the needle core (2) in a return tendency.

10. The blood collection device according to claim 1, characterized in that: The second baffle (33) and the second inclined surface (32) are an integral structure.

11. The blood collection device according to claim 1, characterized in that: The outer shell (1) consists of a body (10) and a firing depth adjustment ring (16), the latter being coaxially sleeved on the front end of the former and rotatably arranged relative to the former; The inner part of the emission depth adjustment ring (16) is provided with multiple adjustment step surfaces (121) around the axial direction, and each adjustment step surface (121) is raised step by step along the axial direction. When the emission depth adjustment ring (16) rotates, the emission depth of the needle core (2) is adjusted by abutting and cooperating with the limiting stop surface (23) of the needle core (2) at different depth positions.

12. The blood collection device according to claim 11, characterized in that: The front end of the body (10) is provided with a buckle (101), and the end face of the emission depth adjustment ring (16) is provided with an arc-shaped slot (161). The buckle (101) is slidably positioned in the arc-shaped slot (161), thereby forming a rotating assembly between the emission depth adjustment ring (16) and the body (10).

13. The blood collection device according to claim 1, characterized in that: The tail cap (3) is slidably fitted on the outer shell (1). After the needle core (2) is fired, the tail cap (3) and the outer shell (1) are locked by a locking structure, so that the tail cap (3) remains in the outer shell (1) and does not reset.

14. The blood collection device according to claim 13, characterized in that: The tail cap (3) is provided with a hook (34); the outer shell (1) is provided with an inner buckle (14) corresponding to the hook (34) of the tail cap (3). After the needle core (2) is fired, the hook (34) and the inner buckle (14) lock together.

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