A lancet device
By using a spring arm structure to drive the needle core axially in the blood collection needle device, the problem of needle core rotation and launch delay in the prior art is solved, realizing instantaneous activation of the blood collection needle and improving blood collection efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN HUAHONG TECH
- Filing Date
- 2024-12-25
- Publication Date
- 2026-06-26
AI Technical Summary
In existing top-triggered blood collection needle devices, when the needle core is rotated by the pressing component and then fired, gaps exist between the components, causing the two wings of the needle core to not enter the firing slot simultaneously, resulting in a firing delay.
The spring arm structure is adopted, which drives the spring arm to deform laterally when the pressing part is pressed, allowing the needle core to move axially. This eliminates the need for a rotating needle core launching structure and ensures that the needle core moves immediately along the axis.
This effectively avoids launch delay, enables instantaneous activation of the blood collection needle, and improves blood collection efficiency.
Smart Images
Figure CN122272015A_ABST
Abstract
Description
Technical Field
[0001] Embodiments of this disclosure relate to the field of medical devices, and more particularly to a blood collection needle device. Background Technology
[0002] The existing top-triggered blood collection needle device uses a pressing component to drive the needle core to rotate and then launch. Due to the gaps between the components, when the pressing component at the top is pressed to trigger the launch, there is a problem that the two wings of the needle core cannot enter the launch slot at the same time, resulting in a launch delay. Summary of the Invention
[0003] This disclosure is made to alleviate or solve at least one aspect or point of the above-mentioned problems. This disclosure proposes a firing structure that effectively avoids the firing delay problem, thereby enabling effective firing of the blood collection needle.
[0004] Embodiments of this disclosure provide a blood collection needle, comprising:
[0005] The outer casing has a first end and a second end, the second end of which is provided with a needle outlet;
[0006] At least two spring arms are positioned at the first end of the jacket;
[0007] A blood collection needle is adapted to be fitted inside the outer sheath. The end of the blood collection needle near the needle outlet is provided with a needle tip. The outer wall of the needle core of the blood collection needle is provided with at least two stop protrusions. The at least two stop protrusions are adapted to abut against the ends of the at least two spring arms in the axial direction respectively. The needle core is adapted to pass through the needle core space between the ends of the at least two spring arms in the axial direction.
[0008] A pressing member, adapted to be pressed and assembled on the first end in the direction of the needle outlet, includes a pressing cap and at least two extensions, the at least two extensions being located on the side of the pressing cap facing the needle outlet;
[0009] The drive spring abuts against the pressing element at one end and against the stop protrusion of the blood collection needle at the other end.
[0010] in:
[0011] The extension is adapted to abut against the corresponding ends of the at least two spring arms when the pressing member moves toward the needle outlet, thereby driving the ends of the at least two spring arms to deform or move laterally outward, so that the at least two stop protrusions simultaneously disengage from the abutment of the ends of the at least two spring arms and allow the needle core to move toward the needle outlet. Attached Figure Description
[0012] Figure 1This is a partially cutaway structural diagram of a blood collection needle device in an assembled state according to an exemplary embodiment of the present disclosure;
[0013] Figure 2A This is a perspective view of a jacket according to an exemplary embodiment of the present disclosure;
[0014] Figure 2B for Figure 2A A cross-sectional diagram of the inner and outer layers;
[0015] Figure 3A This is a perspective view of an inner sleeve according to an exemplary embodiment of the present disclosure;
[0016] Figure 3B for Figure 3A A cross-sectional view of the inner sleeve;
[0017] Figure 4A This is a perspective view of a pressing member according to an exemplary embodiment of the present disclosure;
[0018] Figure 4B for Figure 4A A cross-sectional view of the pressing component;
[0019] Figure 5A This is a three-dimensional schematic diagram of a blood collection needle according to an exemplary embodiment of the present disclosure;
[0020] Figure 5B for Figure 5A A three-dimensional diagram of the blood collection needle from another angle;
[0021] Figure 6 for Figure 1 A partial cross-sectional view of the blood collection needle device, showing the removal of the pressing component;
[0022] Figure 7 for Figure 1 A three-dimensional schematic diagram of the blood collection needle device, in which the outer sleeve and return spring have been removed;
[0023] Figure 8 This is a partially cutaway structural diagram of a blood collection needle device in a firing state according to an exemplary embodiment of the present disclosure, in which the needle cap has been removed;
[0024] Figure 9A This is a partially cutaway structural diagram of a blood collection needle device in a firing state according to an exemplary embodiment of the present disclosure;
[0025] Figure 9B for Figure 9A A magnified schematic diagram of the blood collection needle device from another perspective;
[0026] Figure 10 This is a schematic diagram of a blood collection needle device after firing, according to an exemplary embodiment of the present disclosure.
[0027] In the picture:
[0028] 1. Outer jacket; 1A. Small diameter section; 1B. Large diameter section; 1C. Transition section; 11. Outer jacket needle core guide structure; 12. Needle outlet; 13. Stop step; 14. First hook; 14A. First hook inclined surface; 14B. First hook contact surface; 15. Opening; 16. Stop protrusion guide structure; 17. Inner end face groove;
[0029] 2. Inner sleeve; 21. Spring arm; 22. Spring arm end; 23. Spring arm protrusion; 24. Inner sleeve needle core guide structure; 25. Abutment surface;
[0030] 3. Pressing component; 31. Pressing cap; 32. Extension; 33. First driving rib; 34. Second driving rib; 35. Drive rib inclined surface; 36. Drive rib groove; 37. Second hook; 37A. Second hook inclined surface; 37B. Second hook abutment surface; 38. Pressing component needle core guide structure; S1. Needle core space; S2. Stop protrusion space; S3. Guide protrusion space;
[0031] 4. Blood collection needle; 41. Needle core; 42. Needle cap; 43. Stop protrusion; 44. Guide protrusion; 45. Lower end face of guide protrusion; 46. Needle tip; 47. Needle cap protrusion; 48. Lower end face of stop protrusion;
[0032] 5. Drive spring;
[0033] 6. Return spring. Detailed Implementation
[0034] 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.
[0035] The blood collection needle in this embodiment eliminates the need for a pressing member to drive the needle core to rotate before firing. Instead, a spring arm abuts against the needle core before firing, and the core is fired after the pressing member releases the abutment. Because the blood collection needle can immediately move axially towards the needle outlet after the top pressing member triggers firing, the firing delay problem is solved.
[0036] 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 being the cross section, and the circumferential direction of the cross section being 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. Exemplarily, in... Figure 1 In this context, the vertical direction is the stretching direction, i.e., the axial direction. In embodiments of this disclosure, "vertical" is, for example, in... Figure 1 The upper or above part of the blood collection needle device, "below" for example, in Figure 1 The lower part or below the blood collection needle device in the middle.
[0037] In embodiments of this disclosure, a pair of sidewalls may be, for example, a pair of opposing sidewalls in a rectangular cross-sectional shape, or opposing walls in a radial direction in an elliptical or circular cross-section; while another pair of sidewalls may be, for example, another pair of opposing sidewalls in a rectangular cross-sectional shape, or opposing walls in another radial direction perpendicular to the radial direction in an elliptical or circular cross-section.
[0038] 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.
[0039] The following reference Figures 1-10 The technical solution disclosed herein will be described in more detail.
[0040] As shown in the figure, the blood collection needle device includes:
[0041] Coat 1 (see Figure 1 , Figure 2A and Figure 2B ), having a first end ( Figure 1 , Figure 2A and Figure 2B (upper end) and second end ( Figure 1 , Figure 2A and Figure 2B The lower end of the middle), the second end is provided with a needle outlet 12 (see the ...). Figure 2B );
[0042] At least two spring arms 21 (see Figure 4A and Figure 4B ), set at the first end of the outer jacket 1;
[0043] Blood collection needle 4 (see Figure 5A and Figure 5B The blood collection needle 1 is adapted to be fitted inside the outer casing 1, and a needle tip 46 is provided at the end of the blood collection needle 1 near the needle outlet 12 (see...). Figure 9AThe outer wall of the needle core 41 of the blood collection needle is provided with at least two stop protrusions 43 (see...). Figure 5A The at least two stop protrusions 43 are adapted to abut against the ends of the at least two spring arms 21 in the axial direction (see, for example, [reference needed]). Figure 8 The needle core 41 is adapted to pass through the needle core space S1 between the ends of at least two spring arms in the axial direction (see...). Figure 4B );
[0044] Pressing member 3, adapted to be pressed and assembled on the first end in the direction of the needle outlet 12, includes a pressing cap 31 and at least two extensions 32, the at least two extensions 32 being located on the side of the pressing cap 31 facing the needle outlet;
[0045] The drive spring 5 abuts against the pressing part 3 at one end and against the stop protrusion 43 of the blood collection needle 4 at the other end.
[0046] in:
[0047] The extension 32 is adapted to abut against the corresponding ends 22 of the at least two spring arms 21 when the pressing member 3 moves toward the needle outlet 12, thereby driving the ends 22 of the at least two spring arms to deform or move laterally outward, so that the stop protrusion 43 simultaneously disengages from the abutment of the ends 22 of the at least two spring arms 21 and allows the needle core 41 to move toward the needle outlet 12.
[0048] In the illustrated embodiment, the extension 32 is provided with a driving surface, which is an inclined driving surface that gradually moves away from the needle core 41 in an upward direction. The inclined driving surface is adapted to abut against the corresponding ends of the at least two spring arms when the pressing member 3 moves toward the needle outlet 12, thereby driving the ends of the at least two spring arms to deform or move laterally outward.
[0049] Optionally, although not shown, the portion of the spring arm that contacts the extension is provided with an inclined mating surface that gradually slopes away from the needle core in an upward direction. The extension is adapted to abut against the inclined mating surface to drive the ends of the at least two spring arms to deform or move laterally outward as the extension moves downward.
[0050] The components of the blood collection needle device of this disclosure are described below with reference to the accompanying drawings.
[0051] like Figure 1 , Figure 2A and Figure 2B As shown, exemplarily, the outer jacket 1 may include a small diameter portion 1A (e.g., Figure 1 , Figure 2A and Figure 2B The lower part of the middle section) and the large diameter section 1B (e.g.) Figure 1 , Figure 2A and Figure 2B The upper part of the outer jacket 1 (i.e., the bottom of the smaller diameter portion 1B, i.e., the lower end of the outer jacket 1) is provided with a needle outlet 12, and the larger diameter portion (i.e., the upper end of the outer jacket 1) is used to assemble the pressing component 3. A transition section 1C is provided between the larger diameter portion 1B and the smaller diameter portion 1A, and the transition section is a transition slope or a transition convex surface. In an optional embodiment, the outer jacket 1 can be cylindrical in shape.
[0052] In one embodiment, such as Figure 2B As shown, the transition section 1C is provided with an opening 15. As mentioned later, this opening 15 allows the second hook 37 of the pressing member 3 to pass through during the pressing process.
[0053] In one embodiment, such as Figure 2B As shown, the inner sides of both ends of the large diameter portion 1B are provided with first hooks 14, and the first hooks 14 are provided with a first hook inclined surface 14A and a first hook abutting surface 14B.
[0054] like Figure 2B As shown, in one embodiment, an inner end face groove 17 is provided near the lower end of the needle outlet 12. As can be understood, the shape of the needle outlet 12 is configured to allow the second part of the needle cap 42 of the blood collection needle 4 (mentioned later) to pass through in the first direction, but not to allow the needle cap protrusion 47 provided on the first part of the needle cap 42 of the blood collection needle 4 (mentioned later) to pass through, while in the second direction, which is coplanar with and perpendicular to the first direction, the needle cap protrusion 47 is allowed to pass through.
[0055] exist Figure 1 , Figure 2A and Figure 2B In the illustrated embodiment, the cross-section of the outer jacket 1 is generally rectangular, but in an alternative embodiment, the cross-section of the outer jacket 1 may be elliptical.
[0056] The following is a reference to the appendix. Figures 3A-3B Example illustration of inner sleeve 2. Figure 3A This is a perspective view of an inner sleeve according to an exemplary embodiment of the present disclosure; Figure 3B for Figure 3A A cross-sectional view of the inner sleeve. In embodiments of this disclosure, the inner sleeve 2 exists independently of the outer sleeve 1. The inner sleeve 2 is provided with two spring arms 21, each spring arm 21 having a spring arm end 22. In one embodiment of this disclosure, the spring arm 21 is a plate-shaped spring arm, and two spaced-apart spring arm protrusions 23 are further provided on the inner side of the end 22 of the plate-shaped spring arm. Figure 3B As shown, the inner sleeve 2 is provided with an abutment surface 25.
[0057] In one embodiment, the inner sleeve 2 is further provided with an inner sleeve needle core guide structure 24, such as a guide groove.
[0058] The following is a reference to the appendix. Figures 4A-4B Example illustration of pressing element 3. Figure 4A This is a perspective view of a pressing member according to an exemplary embodiment of the present disclosure; Figure 4B for Figure 4A A cross-sectional view of the pressing component. (See diagram below.) Figure 4A and Figure 4B As shown, the pressing member 3 includes an extension 31.
[0059] like Figure 4B As shown, in an optional embodiment, the extension 31 on the same side includes a first driving rib 33 and a second driving rib 34 spaced apart from each other. Each driving rib is provided with a driving rib inclined surface 35, which constitutes an inclined driving surface of the extension. Figure 4B As shown, the stop protrusion space S2 is between the first driving rib 33 and the second driving rib 34. Figure 4B As shown, the two pairs of first driving ribs 33 and second driving ribs 34 together define the needle core space S1.
[0060] like Figure 4B As shown, in an optional embodiment, the extensions 31 on both sides are spaced apart from each other to define a guide protrusion space S3 between the extensions on both sides.
[0061] See Figure 4B In an optional embodiment, the inner wall of the pressing member 3 opposite to the guide protrusion space S3 is further provided with a pressing member needle core guide structure 38, such as a guide groove.
[0062] like Figure 4B As shown, the pressing component 3 is also provided with second hooks 37 on both sides, such as Figure 4A As shown, the second hook 37 includes a second hook inclined surface 37A and a second hook abutting surface 37B.
[0063] Figure 5A This is a three-dimensional schematic diagram of a blood collection needle 4 according to an exemplary embodiment of the present disclosure. Figure 5B for Figure 5A A three-dimensional schematic diagram of the blood collection needle from another angle. The needle core 41 of the blood collection needle 4 is provided with a stop protrusion 43 and a guide protrusion 44. (See diagram below.) Figure 5A As shown, the blood collection needle also includes a needle cap 42 for covering the needle tip 46. The needle cap 42 includes a first part adapted to be fitted inside the outer sheath 1 and a second part located outside the outer sheath 1. The first part includes an outwardly protruding needle cap boss 47 provided on the outer wall of the needle cap.
[0064] Figure 5A and Figure 5B In the middle, the positions of the adjacent stop protrusion 43 and guide protrusion 44 are 90° apart in the circumferential direction.
[0065] Figure 1 This is a partially cutaway structural diagram of a blood collection needle device in an assembled state according to an exemplary embodiment of the present disclosure; Figure 6 for Figure 1 A partial cross-sectional view of the blood collection needle device, showing the removal of the pressing component; Figure 7 for Figure 1 A three-dimensional schematic diagram of the blood collection needle device, in which the outer sleeve and return spring 6 have been removed.
[0066] The following reference Figure 1 , Figure 6 and Figure 7 An exemplary illustration is provided of the assembly of a blood collection needle device based on an exemplary embodiment of the present disclosure.
[0067] First, the inner sleeve 2 is placed inside the upper end of the outer sleeve 1. The abutting surface 25 at the lower end of the inner sleeve 2 cooperates with the transition slope or transition convex surface at the transition section 1C of the outer sleeve 1 to support the inner sleeve 2. The two elastic arms 21 of the inner sleeve 2 extend upward at an angle.
[0068] Next, the needle cap 42 of the blood collection needle 4 passes through the return spring 6, and together with the return spring 6, passes through the inner sleeve 2. After the second part of the needle cap 42 passes through the needle outlet 12, the needle cap boss 47 is adapted to mate with the lower end face groove 17, such as... Figure 6 As shown;
[0069] Then, the drive spring 4 is sleeved on the upper part of the needle core 41 of the blood collection needle 4. The lower end of the drive spring 4 abuts against the upper end face of the stop protrusion 43, and the upper end of the drive spring 4 is adapted to abut against the inner wall surface of the top of the pressing member 3 or to engage with the spring locking post (not shown) provided on the inner wall of the top of the pressing member 3.
[0070] like Figure 1 As shown, before installing or assembling the pressing component 3, in Figure 6 In the shown state (where the return spring 6 is not shown), the drive spring 5, thus placing the upper end of the needle core 41, is within the needle core space S1 defined by the two pairs of first drive ribs 33 and second drive ribs 34. The stop protrusion 43 is placed within the stop protrusion space S2 defined between the first drive ribs 33 and second drive ribs 34, while the guide protrusion 44 is placed within the guide protrusion space S3 defined by the extensions 31 on both sides spaced apart from each other. Figure 7 As shown.
[0071] When installing or assembling the pressing component 3, the first hook 14 and / or the second hook 37 are provided with hook ramps, which allows the second hook 37 to pass over the first hook 14 and enter the outer sleeve 1. That is, the second hook ramps 37A of the second hooks 37 on both sides of the pressing component 3 pass over the first hooks 14 on both sides of the large diameter portion 1B based on elastic deformation. Then, because the first hook 14 and the second hook 37 are respectively provided with the first hook abutment surface 14B and the second hook abutment surface 37B, after the second hook 37 passes over the first hook 14, the hook abutment surfaces of the first hook 14 and the second hook 37 are adapted to abut against each other to prevent the second hook 37 from passing over the first hook 14 upward.
[0072] With the pressing member 3 installed in place, the pressing member needle core guide structure 38, the inner needle core guide structure 240, and the outer needle core guide structure 11 of the pressing member 3 are aligned axially, and the guide protrusion 44 is also located in the inner needle core guide structure 24. When the pressing member is pressed down subsequently, the guide protrusion 44 can also enter the pressing member needle core guide structure 38. However, in an optional embodiment, any one, two, or all of the pressing member needle core guide structure 38, the inner needle core guide structure 240, and the outer needle core guide structure 11 may not be provided.
[0073] like Figure 1 As shown, in an optional embodiment, when assembled, the driving ramp of the extension 31 has abutted or contacted the end 22 of the spring arm 21. More specifically, the two spaced-apart elastic protrusions 23 on each end 22 contact the driving rib ramps 35 of the corresponding first driving rib 33 and second driving rib 34, respectively. As will be understood, the elastic protrusions 23 may be two separate protrusions or a single integral elastic protrusion.
[0074] like Figure 1 As shown, in an optional embodiment, since the needle cap protrusion 47 abuts against the lower end face groove 17 after the pressing member 3 is assembled onto the outer sleeve 1, thereby preventing the blood collection needle 4 from moving further downward, the stop protrusion 43 is spaced apart from the spring arm 21 in the axial direction. However, as will be understood, in another embodiment, the stop protrusion 43 may also contact the spring arm 21 at this time.
[0075] Figure 8 This is a partially cutaway structural diagram of a blood collection needle device in a firing state according to an exemplary embodiment of the present disclosure. Figure 8 In the middle, the needle cap 42 has been removed. Because there is no obstruction from the needle cap protrusion 47, the needle core 41 is driven downwards by the drive spring 5, thus... Figure 8 As shown, the lower end face 48 of the stop protrusion abuts against or contacts the end 22 of the spring arm 21.
[0076] Figure 9AThis is a partially cross-sectional schematic diagram of a blood collection needle device in a firing state according to an exemplary embodiment of the present disclosure. Figure 9B for Figure 9A A magnified schematic diagram of the blood collection needle device from another perspective. See below for further details. Figure 9A and Figure 9B This describes the firing of the blood collection needle.
[0077] When the pressing member 3 is pressed down, the inclined surface 35 of the first driving rib 33 and the second driving rib 34 abuts against the two spaced elastic protrusions 23 on the end 22. When the inclined surface 35 of the driving rib moves down, the end 22 of the two spring arms 21 is driven to deform or move laterally outward. The distance between the end 22 of the spring arms 21 increases so that the stop protrusion 43 disengages from the abutment of the end 22 of the two spring arms 21 at the same time, allowing the needle core 41 to move toward the needle outlet 12.
[0078] When the needle core 41 moves towards the needle outlet 12, the guide protrusion 44 can enter the outer sleeve needle core guide structure 11, simultaneously compressing the return spring 6; during the downward movement of the needle core 41, the needle tip or needle head 46 will pierce out from the needle outlet 12 until the lower end face of the guide protrusion 44 abuts against the stop step 13 of the outer sleeve, thereby stopping the needle core 41 from continuing to move downward. At this time, if Figure 9A and 9B As shown, the return spring 6 is compressed between the lower end face of the guide protrusion 44 and the inner end face of the lower end of the outer sleeve 1. Furthermore, when the outer sleeve 1 is provided with a stop protrusion guide structure 16, during the downward movement of the needle core 41, the stop protrusion 43 will enter the stop protrusion guide structure 16. As can be understood, the stop protrusion 43 and the stop step in the stop protrusion guide structure 16 can also prevent the needle core 41 from continuing to move downward.
[0079] like Figure 9A As shown, when the pressing member 3 is pressed into place, the spring arm protrusion 22 is engaged in the corresponding drive rib groove 36.
[0080] The opening 15 allows the second hook 37 of the pressing member 3 to pass through during the pressing process.
[0081] Figure 10 This is a schematic diagram of a blood collection needle device after firing, according to an exemplary embodiment of the present disclosure. Figure 10 As shown, after the blood collection needle is inserted, the needle core 41 moves into the outer casing 1 under the action of the return spring 6, and the needle tip or needle head 46 retracts into the outer casing 1.
[0082] In the illustrated embodiment, the inner sleeve 2 exists independently of the outer sleeve 1. However, in other embodiments of this disclosure, the inner sleeve 2 may not be provided, and the spring arm 21 may be directly provided on the inner wall of the outer sleeve 1.
[0083] In the illustrated embodiment, the needle core 41 is provided with a stop protrusion 43 and a guide protrusion 44. However, in another embodiment of this disclosure, only the stop protrusion 43 may be provided. The upper end face of the stop protrusion 43 may abut against the drive spring 5, and the lower end face of the stop protrusion 43 may abut against the reset spring 6.
[0084] In the embodiments illustrated in this disclosure, although two extensions and two spring arms are defined, it will be understood that there may be more spring arms and more extensions arranged around the needle core.
[0085] It should also be noted that, in this disclosure, the so-called inclined driving surface or inclined mating surface includes not only the inclined plane, but also the convex surface or convex arc surface that can achieve a function similar to the inclined plane.
[0086] Based on the above, this disclosure proposes the following technical solution:
[0087] 1. A blood collection needle device, comprising:
[0088] The outer casing has a first end and a second end, the second end of which is provided with a needle outlet;
[0089] At least two spring arms are positioned at the first end of the jacket;
[0090] A blood collection needle is adapted to be fitted inside the outer sheath. The end of the blood collection needle near the needle outlet is provided with a needle tip. The outer wall of the needle core of the blood collection needle is provided with at least two stop protrusions. The at least two stop protrusions are adapted to abut against the ends of the at least two spring arms in the axial direction respectively. The needle core is adapted to pass through the needle core space between the ends of the at least two spring arms in the axial direction.
[0091] A pressing member, adapted to be pressed and assembled on the first end in the direction of the needle outlet, includes a pressing cap and at least two extensions, the at least two extensions being located on the side of the pressing cap facing the needle outlet;
[0092] The drive spring abuts against the pressing element at one end and against the stop protrusion of the blood collection needle at the other end.
[0093] in:
[0094] The extension is adapted to abut against the corresponding ends of the at least two spring arms when the pressing member moves toward the needle outlet, thereby driving the ends of the at least two spring arms to deform or move laterally outward, so that the at least two stop protrusions simultaneously disengage from the abutment of the ends of the at least two spring arms and allow the needle core to move toward the needle outlet.
[0095] 2. The blood collection needle device according to 1, wherein:
[0096] Each extension is provided with a driving surface, which is an inclined driving surface that gradually tilts away from the needle core in an upward direction. The inclined driving surface is adapted to abut against the corresponding ends of the at least two spring arms when the pressing member moves toward the needle outlet, thereby driving the ends of the at least two spring arms to deform or move laterally outward; or
[0097] The portion of the spring arm that contacts the extension is provided with an inclined mating surface that gradually moves away from the needle core in an upward direction. The extension is adapted to abut against the inclined mating surface to drive the ends of the at least two spring arms to deform or move laterally outward during the downward movement of the extension.
[0098] 3. The blood collection needle device according to 2, wherein:
[0099] The at least two spring arms include two spring arms that are laterally opposite each other;
[0100] The at least two extensions include two extensions;
[0101] The outer wall of the needle core of the blood collection needle is provided with two stop protrusions that are opposite each other in the transverse direction. The two stop protrusions are adapted to abut against the ends of the two spring arms in the axial direction, and the needle core is adapted to pass through the needle core space between the ends of the two spring arms in the axial direction.
[0102] The driving surfaces of the two extensions are adapted to abut against the ends of the two spring arms respectively when the pressing member moves toward the needle outlet, thereby driving the ends of the two spring arms to deform or move laterally outward, so that the two stop protrusions simultaneously disengage from the abutment of the ends of the two spring arms and allow the needle core to move toward the needle outlet.
[0103] 4. The blood collection needle device according to 3, wherein:
[0104] The two spring arms extend upwards toward each other and are laterally opposite each other.
[0105] 5. The blood collection needle device according to 3, wherein:
[0106] Each extension includes a first driving rib and a second driving rib spaced apart from each other, and each driving rib is provided with a driving rib inclined surface, which constitutes the driving surface of the extension.
[0107] Each stop protrusion is located in the stop protrusion space between the corresponding first drive rib and second drive rib.
[0108] 6. The blood collection needle device according to 5, wherein:
[0109] The spring arm corresponding to each extension is a plate-shaped spring arm, and the end of the plate-shaped spring arm is adapted to simultaneously contact the inclined surface of the driving rib of the corresponding first driving rib and second driving rib.
[0110] 7. The blood collection needle device according to 6, wherein:
[0111] The inner side of the end of the plate-shaped elastic arm is provided with an elastic arm protrusion, which is adapted to contact the inclined surface of the corresponding first driving rib and the second driving rib respectively.
[0112] The inclined surface of the driving rib is provided with a driving rib groove, which is adapted to cooperate with the elastic protrusion so that after the pressing member presses and the blood collection needle is launched, the spring arm protrusion is engaged in the corresponding driving rib groove.
[0113] 8. The blood collection needle device according to 6, wherein:
[0114] The first and second drive ribs of one extension and the first and second drive ribs of another extension together define the space for receiving the drive spring.
[0115] 9. The blood collection needle device according to any one of 2-8, wherein:
[0116] The outer wall of the needle core is provided with two guide protrusions that are opposite each other in the transverse direction. The two guide protrusions and the two stop protrusions are evenly spaced apart in the circumferential direction.
[0117] When the pressing element is pressed, the guide protrusion is adapted to enter the guide protrusion space between the extensions on both sides or move along the guide protrusion space.
[0118] 10. The blood collection needle device according to 9, wherein:
[0119] In the axial direction, the guide protrusion is closer to the needle outlet than the stop protrusion.
[0120] 11. The blood collection needle device according to 9, wherein:
[0121] The outer sleeve is provided with an outer sleeve needle core guide structure, and the outer sleeve needle core guide structure is provided with a stop step. The stop step is adapted to abut against the lower end face of the guide protrusion to restrict the needle core from moving towards the needle outlet.
[0122] 12. The blood collection needle device according to claim 9 further includes:
[0123] A return spring is fitted onto the needle core between the inner end face of the second end of the outer sleeve and the lower end face of the guide protrusion.
[0124] 13. The blood collection needle device according to 9, wherein:
[0125] The inner wall of the outer jacket near the second end is provided with a stop protrusion guide.
[0126] 14. The blood collection needle device according to 9, wherein:
[0127] The blood collection needle device includes an inner sleeve disposed at the first end of an outer sleeve, and the inner sleeve having two elastic arms on one pair of its side walls, and an inner sleeve needle core guide structure on its other pair of side walls; and / or the outer sleeve having an outer sleeve needle core guide structure on one pair of its side walls; or
[0128] The outer sleeve has a first needle core guide structure on a pair of sidewalls at the first end and a second needle core guide structure on a pair of sidewalls at the second end. Both the first and second needle core guide structures are used to guide the needle core.
[0129] 15. The blood collection needle device according to claim 1, wherein:
[0130] The blood collection needle device includes an inner sleeve, which is disposed at the first end of the outer sleeve, and the inner sleeve is provided with at least two spring arms.
[0131] 16. The blood collection needle device according to 15, wherein:
[0132] The upper end of the outer jacket is a large-diameter portion, and the lower end is a small-diameter portion. A transition section is provided between the large-diameter portion and the small-diameter portion. The inner wall surface of the transition section includes a transition slope or a transition convex surface.
[0133] The lower end of the inner sleeve is provided with an abutment surface, and the transition slope or transition convex surface is adapted to cooperate with the abutment surface to support the inner sleeve.
[0134] 17. The blood collection needle device according to claim 1, wherein:
[0135] The upper part of the outer jacket is a large diameter section, and the lower part is a small diameter section, with a transition section provided between the large diameter section and the small diameter section;
[0136] A first hook is provided on the inner side of the upper end of the large diameter portion, and a second hook is provided on the outer side of the lower end of the pressing part. The first hook and / or the second hook are provided with hook bevels to allow the second hook to pass over the first hook and enter the outer sleeve. Both the first hook and the second hook are provided with hook abutting surfaces. After the second hook passes over the first hook, the hook abutting surfaces of the first hook and the second hook are adapted to abut against each other to prevent the second hook from passing over the first hook upward.
[0137] 18. The blood collection needle device according to 17, wherein:
[0138] The transition section is provided with an opening to allow the second hook of the presser to pass through during the pressing process.
[0139] 19. The blood collection needle device according to claim 1, wherein:
[0140] The blood collection needle also includes a needle cap for covering the needle tip, the needle cap including a first portion adapted to be fitted inside the outer sheath and a second portion located outside the outer sheath;
[0141] The first part includes an outwardly protruding needle cap boss provided on the outer wall of the needle cap, the needle cap boss being adapted to abut against the inner end face of the second end of the outer sleeve, and when the needle cap boss abuts against the inner end face of the second end of the outer sleeve, the stop protrusion and the end of the spring arm are spaced apart in the axial direction.
[0142] When the needle cap is removed, the stop protrusion abuts against the end of the spring arm in the axial direction based on the elastic force of the drive spring.
[0143] 20. The blood collection needle device according to 19, wherein:
[0144] The inner end face of the second end of the outer jacket is provided with an inner end face groove, and the needle cap boss is adapted to be placed in the inner end face groove.
[0145] 21. The blood collection needle device according to claim 1, wherein:
[0146] The at least two spring arms are directly mounted on the inner wall of the first end of the outer casing.
[0147] 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.
[0148] 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.
[0149] 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 device, comprising: The outer casing has a first end and a second end, the second end of which is provided with a needle outlet; At least two spring arms are positioned at the first end of the jacket; A blood collection needle is adapted to be fitted inside the outer sheath. The end of the blood collection needle near the needle outlet is provided with a needle tip. The outer wall of the needle core of the blood collection needle is provided with at least two stop protrusions. The at least two stop protrusions are adapted to abut against the ends of the at least two spring arms in the axial direction respectively. The needle core is adapted to pass through the needle core space between the ends of the at least two spring arms in the axial direction. A pressing member, adapted to be pressed and assembled on the first end in the direction of the needle outlet, includes a pressing cap and at least two extensions, the at least two extensions being located on the side of the pressing cap facing the needle outlet; The drive spring abuts against the pressing element at one end and against the stop protrusion of the blood collection needle at the other end. in: The extension is adapted to abut against the corresponding ends of the at least two spring arms when the pressing member moves toward the needle outlet, thereby driving the ends of the at least two spring arms to deform or move laterally outward, so that the at least two stop protrusions simultaneously disengage from the abutment of the ends of the at least two spring arms and allow the needle core to move toward the needle outlet.
2. The blood collection needle device according to claim 1, wherein: Each extension is provided with a driving surface, which is an inclined driving surface that gradually tilts away from the needle core in an upward direction. The inclined driving surface is adapted to abut against the corresponding ends of the at least two spring arms when the pressing member moves toward the needle outlet, thereby driving the ends of the at least two spring arms to deform or move laterally outward; or The portion of the spring arm that contacts the extension is provided with an inclined mating surface that gradually moves away from the needle core in an upward direction. The extension is adapted to abut against the inclined mating surface to drive the ends of the at least two spring arms to deform or move laterally outward during the downward movement of the extension.
3. The blood collection needle device according to claim 2, wherein: The at least two spring arms include two spring arms that are laterally opposite each other; The at least two extensions include two extensions; The outer wall of the needle core of the blood collection needle is provided with two stop protrusions that are opposite each other in the transverse direction. The two stop protrusions are adapted to abut against the ends of the two spring arms in the axial direction, and the needle core is adapted to pass through the needle core space between the ends of the two spring arms in the axial direction. The driving surfaces of the two extensions are adapted to abut against the ends of the two spring arms respectively when the pressing member moves toward the needle outlet, thereby driving the ends of the two spring arms to deform or move laterally outward, so that the two stop protrusions simultaneously disengage from the abutment of the ends of the two spring arms and allow the needle core to move toward the needle outlet.
4. The blood collection needle device according to claim 3, wherein: The two spring arms extend upwards toward each other and are laterally opposite each other.
5. The blood collection needle device according to claim 3, wherein: Each extension includes a first driving rib and a second driving rib spaced apart from each other, and each driving rib is provided with a driving rib inclined surface, which constitutes the driving surface of the extension. Each stop protrusion is located in the stop protrusion space between the corresponding first drive rib and second drive rib.
6. The blood collection needle device according to claim 5, wherein: The spring arm corresponding to each extension is a plate-shaped spring arm, and the end of the plate-shaped spring arm is adapted to simultaneously contact the inclined surface of the driving rib of the corresponding first driving rib and second driving rib.
7. The blood collection needle device according to claim 6, wherein: The inner side of the end of the plate-shaped elastic arm is provided with an elastic arm protrusion, which is adapted to contact the inclined surface of the corresponding first driving rib and the second driving rib respectively. The inclined surface of the driving rib is provided with a driving rib groove, which is adapted to cooperate with the elastic protrusion so that after the pressing member presses and the blood collection needle is launched, the spring arm protrusion is engaged in the corresponding driving rib groove.
8. The blood collection needle device according to claim 6, wherein: The first and second drive ribs of one extension and the first and second drive ribs of another extension together define the space for receiving the drive spring.
9. The blood collection needle device according to any one of claims 2-8, wherein: The outer wall of the needle core is provided with two guide protrusions that are opposite each other in the transverse direction. The two guide protrusions and the two stop protrusions are evenly spaced apart in the circumferential direction. When the pressing element is pressed, the guide protrusion is adapted to enter the guide protrusion space between the extensions on both sides or move along the guide protrusion space.
10. The blood collection needle device according to claim 9, wherein: In the axial direction, the guide protrusion is closer to the needle outlet than the stop protrusion.
11. The blood collection needle device according to claim 9, wherein: The outer sleeve is provided with an outer sleeve needle core guide structure, and the outer sleeve needle core guide structure is provided with a stop step. The stop step is adapted to abut against the lower end face of the guide protrusion to restrict the needle core from moving towards the needle outlet.
12. The blood collection needle device according to claim 9, further comprising: A return spring is fitted onto the needle core between the inner end face of the second end of the outer sleeve and the lower end face of the guide protrusion.
13. The blood collection needle device according to claim 9, wherein: The inner wall of the outer jacket near the second end is provided with a stop protrusion guide.
14. The blood collection needle device according to claim 9, wherein: The blood collection needle device includes an inner sleeve disposed at the first end of an outer sleeve, and the inner sleeve having two elastic arms on one pair of its side walls, and an inner sleeve needle core guide structure on its other pair of side walls; and / or the outer sleeve having an outer sleeve needle core guide structure on one pair of its side walls; or The outer sleeve has a first needle core guide structure on a pair of sidewalls at the first end and a second needle core guide structure on a pair of sidewalls at the second end. Both the first and second needle core guide structures are used to guide the needle core.
15. The blood collection needle device according to claim 1, wherein: The blood collection needle device includes an inner sleeve, which is disposed at the first end of the outer sleeve, and the inner sleeve is provided with at least two spring arms.
16. The blood collection needle device according to claim 15, wherein: The upper end of the outer jacket is a large-diameter portion, and the lower end is a small-diameter portion. A transition section is provided between the large-diameter portion and the small-diameter portion. The inner wall surface of the transition section includes a transition slope or a transition convex surface. The lower end of the inner sleeve is provided with an abutment surface, and the transition slope or transition convex surface is adapted to cooperate with the abutment surface to support the inner sleeve.
17. The blood collection needle device according to claim 1, wherein: The upper part of the outer jacket is a large diameter section, and the lower part is a small diameter section, with a transition section provided between the large diameter section and the small diameter section; A first hook is provided on the inner side of the upper end of the large diameter portion, and a second hook is provided on the outer side of the lower end of the pressing part. The first hook and / or the second hook are provided with hook bevels to allow the second hook to pass over the first hook and enter the outer sleeve. Both the first hook and the second hook are provided with hook abutting surfaces. After the second hook passes over the first hook, the hook abutting surfaces of the first hook and the second hook are adapted to abut against each other to prevent the second hook from passing over the first hook upward.
18. The blood collection needle device according to claim 17, wherein: The transition section is provided with an opening to allow the second hook of the presser to pass through during the pressing process.
19. The blood collection needle device according to claim 1, wherein: The blood collection needle also includes a needle cap for covering the needle tip, the needle cap including a first portion adapted to be fitted inside the outer sheath and a second portion located outside the outer sheath; The first part includes an outwardly protruding needle cap boss provided on the outer wall of the needle cap, the needle cap boss being adapted to abut against the inner end face of the second end of the outer sleeve, and when the needle cap boss abuts against the inner end face of the second end of the outer sleeve, the stop protrusion and the end of the spring arm are spaced apart in the axial direction. When the needle cap is removed, the stop protrusion abuts against the end of the spring arm in the axial direction based on the elastic force of the drive spring.
20. The blood collection needle device according to claim 19, wherein: The inner end face of the second end of the outer jacket is provided with an inner end face groove, and the needle cap boss is adapted to be placed in the inner end face groove.
21. The blood collection needle device according to claim 1, wherein: The at least two spring arms are directly mounted on the inner wall of the first end of the outer casing.