Multi-head lancing pen

Abstract

The present invention provides a multi-head lancing pen, comprising a fixed cylinder, a linear drive assembly, a rotary drive assembly, a multi-needle fixed assembly and a depth adjustment assembly. The bottom of the fixed cylinder is fixedly engaged with the depth adjustment assembly. The linear drive assembly, the rotary drive assembly and the multi-needle fixed assembly are all arranged inside the fixed cylinder, and the top of the linear drive assembly protrudes out of the fixed cylinder. The rotary drive assembly is arranged between the linear drive assembly and the multi-needle fixed assembly to control the rotation of the multi-needle fixed assembly. A plurality of blood collection needles are arranged inside the multi-needle fixed assembly. A drive rod is arranged inside the linear drive assembly to press the blood collection needles for blood collection. The multi-needle fixed assembly of the multi-head lancing pen of the present invention is provided with a plurality of blood collection needles, which can be used in sequence, thereby increasing the number of uses, reducing the replacement frequency, and improving the efficiency of blood collection work.

Description

Technical Field

[0001] The invention belongs to the field of blood collection equipment, and in particular relates to a multi-head blood collection pen. Background Art

[0002] The lancet is used for blood sampling. Routine physical examinations, blood sugar tests, etc. all require a lancing pen. The lancing pen is a type of lancing needle. It mostly uses a mechanical device in structure, and the needle uses a ejection device. It can almost completely pierce the skin accurately, quickly, at an appropriate depth, and in a straight path, greatly reducing the patient's pain and bringing sampling into a new stage of development. It basically solves the problems of the previous two generations of lancing needles, such as strong pain and large wounds.

[0003] Commonly used lancets on the market, some resembling pistols and others resembling pens, often attract children's attention and reduce psychological stress, and they also have the same effect on adult patients. However, existing lancets can only be used once and need to be replaced afterwards, which is time-consuming in actual use. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a multi-head lancing pen, in which a multi-needle fixing assembly is provided with multiple lancing needles, which can be used in sequence, thereby increasing the number of uses, reducing the replacement frequency, and improving the efficiency of blood collection work; at the same time, a linear drive assembly is provided inside for pressing the lancing needle for blood collection, and a rotary drive assembly is provided for replacing multiple lancing needles, ensuring that a lancing needle is used only once, thereby ensuring blood collection safety and avoiding the spread of diseases during the blood collection process; a depth adjustment assembly is provided for adjusting the needle outlet height of the lancing needle, reducing the depth of the lancing needle piercing the skin for normal use.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a multi-head lancing pen, including a fixed cylinder, a linear drive component, a rotary drive component, a multi-needle fixing component and a depth adjustment component. The bottom of the fixed cylinder is fixed with the depth adjustment component. The linear drive component, the rotary drive component and the multi-needle fixing component are all arranged inside the fixed cylinder, and the top of the linear drive component protrudes out of the fixed cylinder. The rotary drive component is arranged between the linear drive component and the multi-needle fixing component for controlling the rotation of the multi-needle fixing component. Multiple lancing needles are arranged inside the multi-needle fixing component, and a drive rod is provided in the linear drive component for pressing the lancing needles for blood collection.

[0006] Furthermore, the linear drive assembly includes a drive rod, a drive cylinder, a button, a lifting spring and a return spring, the button is arranged inside the upper end of the fixed cylinder and the two are arranged to slide up and down, the drive cylinder is arranged inside the fixed cylinder and located below the button, and the drive rod is arranged inside the drive cylinder;

[0007] An annular eleventh positioning protrusion is provided at the lower end of the interior of the driving cylinder, and the driving rod includes an integrated driving head and a guide empty rod. A lifting spring is clamped between the bottom end of the driving head and the eleventh positioning protrusion, and the lifting spring is sleeved on the outside of the guide empty rod and coaxially arranged with the eleventh positioning protrusion; one end of the reset spring is clamped on the inner side of the top wall of the button, and the other end is clamped on the top of the driving head.

[0008] Furthermore, a first positioning claw is provided downwardly at the middle position of the top wall of the button, and a second positioning claw is provided on the top of the driving head. The first positioning claw and the second positioning claw are both two-petal structures, and the two ends of the return spring are respectively clamped in the first positioning claw and the second positioning claw;

[0009] The lower end of the driving cylinder is provided with an upwardly extending guide rod, the upper end of the guide rod is tapered, the guide rod is coaxially arranged with the driving head, the guide rod is arranged at the lower end of the driving head and extends vertically downward, the interior of the guide rod is provided with a guide groove, and the guide rod is extended into the guide groove;

[0010] The outer ring of the lower part of the button is provided with a first guide protrusion, and the inner wall of the upper end of the fixing cylinder is provided with a concave first guide groove, and the first guide protrusion extends into the first guide groove and the two are clearance-fitted;

[0011] The driving cylinder is provided with an avoidance hole, the upper end of the driving cylinder is provided with a twelfth positioning protrusion extending outward, and the middle part of the outer ring of the driving cylinder is provided with a fourth stop protrusion, and the fourth stop protrusion is provided corresponding to the first guide groove;

[0012] The lower end of the button is provided with a second guide protrusion and a third limiting protrusion extending downward, and fourth limiting protrusions extending in the circumferential direction are symmetrically provided on both sides of the lower end of the third limiting protrusion. The upper end of the driving cylinder is provided with a second guide groove, a third limiting groove, a fourth limiting groove, a vertical groove and a transverse groove. The second guide groove is connected to the vertical groove, and the second guide protrusion extends into the third limiting groove, and the two are clearance-fitted; the third limiting protrusion is attached to the outer wall of the driving cylinder, and the fourth limiting protrusion is located on the lower side of the twelfth positioning protrusion, and the width of the third limiting protrusion is less than the distance between two adjacent twelfth positioning protrusions;

[0013] The driving head is provided with a lifting and rotating driving surface and a rotating positioning boss; the interior of the button is provided with a driving rib.

[0014] Furthermore, the rotation drive assembly includes a first rotating cylinder, a second rotating cylinder, an operating protrusion and a torsion spring, the first rotating cylinder is arranged at the bottom end of the driving cylinder and is coaxially rotatably connected to the driving cylinder, and the second rotating cylinder is arranged at the lower end of the first rotating cylinder; the lower end of the driving cylinder is provided with a positioning conical cylinder, the upper end of the positioning conical cylinder is provided with a first positioning vertical slot, the lower end of the positioning conical cylinder is provided with a positioning vertical block, and one end surface of the positioning vertical block is provided with a second positioning vertical slot, the torsion spring is sleeved on the outer ring of the positioning conical cylinder, the upper end of the torsion spring is provided with a first vertical rod, and the lower end of the torsion spring is provided with a second vertical rod, the first vertical rod is fixedly clamped in the first positioning vertical slot, and during initial assembly, the second vertical rod is first inserted into the second positioning vertical slot before assembly to facilitate positioning and assembly;

[0015] The fixed cylinder is provided with a first observation port and a second observation port, which correspond to the first rotating cylinder and the second rotating cylinder respectively. The operating protrusion is fixedly installed in the second rotating cylinder, and the operating protrusion passes through the second observation port. The gear numbers are arranged in sequence on the circumference of the outer wall of the first rotating cylinder.

[0016] Furthermore, the first stop protrusions are evenly spaced relative to the axis of the stop cylinder. One of the first stop protrusions is provided with a third vertical positioning slot extending therethrough. The third vertical positioning slot corresponds to the first vertical positioning slot, and the second vertical rod is also inserted into the third vertical positioning slot. The first vertical positioning slot, the second vertical positioning slot 6282, and the third vertical positioning slot are all open structures. The second rotating cylinder achieves its axial positioning via a shoulder structure within the fixed cylinder. The middle portion of the first rotating cylinder is provided with a plurality of downwardly extending thirteenth positioning protrusions, which are aligned with the upper end surface of the second rotating cylinder. The upper end of the first rotating cylinder is provided with a plurality of upwardly extending fourteenth positioning protrusions. The outer ring of the driving cylinder is provided with a fourth stop protrusion, and the upper end surface of the fourteenth positioning protrusion is aligned with the lower end surface of the fourth stop protrusion.

[0017] Furthermore, the multi-needle fixing assembly includes a fixed syringe and an outer sleeve, the fixed syringe and the outer sleeve are arranged coaxially, the outer sleeve is sleeved on the outside of the fixed syringe and is clamped and connected to the fixed syringe; the fixed syringe includes a fixed column and an annular cylinder, the fixed column and the annular cylinder form a plurality of positioning cavities through a partition, and the plurality of blood collection needles are placed in the plurality of positioning cavities, and the bottom of the blood collection needle is provided with a first needle outlet hole and a second needle outlet hole, and the first needle outlet hole and the second needle outlet hole are respectively opened on the bottom wall of the fixed syringe and the bottom wall of the outer sleeve; the outer sleeve and the fixed syringe are both made of elastic engineering plastic.

[0018] Furthermore, a plurality of grooves are evenly arranged on the outer wall of the ring cylinder to form a plum blossom shape, and a sixth positioning protrusion and a seventh positioning protrusion are fixedly arranged in each two adjacent grooves, and the sixth positioning protrusion and the seventh positioning protrusion are tilted outward along the radial direction of the fixed needle cylinder;

[0019] The outer sleeve is provided with a sixth positioning groove and a seventh positioning groove respectively matching the sixth positioning protrusion and the seventh positioning protrusion, the sixth positioning groove is a through-hole structure, and the seventh positioning groove is concavely arranged along the radial direction of the outer sleeve;

[0020] An isolation boss is provided on the inner wall of the outer sleeve, and the isolation boss is arranged below the sixth positioning groove. The annular sleeve is axially limited by multiple isolation bosses.

[0021] Furthermore, a fifth positioning protrusion is provided at the center of the bottom wall of the outer sleeve, and a fifth positioning notch matching the fifth positioning protrusion is provided on the bottom wall of the fixed syringe. Both the fifth positioning protrusion and the fifth positioning notch are conical and have a clearance fit between them.

[0022] The sixth positioning protrusion is arranged on the upper side of the seventh positioning protrusion, the lower end of the sixth positioning protrusion is provided with an upwardly tilted barb, and the seventh positioning protrusion is provided with a shoulder fixing surface;

[0023] The barb of the sixth positioning protrusion protrudes out of the sixth positioning groove, a height limiting ring is provided on the groove wall of the seventh positioning groove, and the shoulder fixing surface of the seventh positioning protrusion is located at the lower side of the height limiting ring;

[0024] A plurality of eighth positioning protrusions are provided on the top of the inner wall of the outer sleeve, and a plurality of ninth positioning protrusions are provided on the outer wall of the annular sleeve, wherein the eighth positioning protrusions are located above the ninth positioning protrusions;

[0025] A tenth positioning protrusion is disposed adjacent to both sides of each sixth positioning groove in the vertical direction, and the two tenth positioning protrusions are symmetrically disposed with the sixth positioning groove as the center.

[0026] Furthermore, a stop cylinder is provided at the lower end of the positioning conical cylinder, and a first stop claw is provided on the outer ring of the stop cylinder. A plurality of first stop protrusions are provided at the lower end of the first rotating cylinder. The first stop claw is clamped on the cavity wall at the upper part of the positioning cavity, and the first stop protrusion is inserted into the groove of the outer ring of the annular cylinder. A second stop claw is provided on the second rotating cylinder, and the second stop claw and the protruding position constituting the groove on the annular cylinder form a ratchet and pawl mechanism.

[0027] Furthermore, the depth adjustment assembly includes a coaxially arranged upper positioning ring, a driving ring and a lifting ring, the lower outer ring of the upper positioning ring is provided with a limiting protrusion, the upper end of the inner ring of the driving ring is provided with a plurality of gear adjustment protrusions, the limiting protrusions and the grooves formed by adjacent gear adjustment protrusions are arranged correspondingly, the lower end of the inner ring of the driving ring is provided with a first spiral protrusion, the lifting ring is sleeved in the driving ring, the outer ring of the lifting ring is provided with a spiral groove, the first spiral protrusion is provided in the spiral groove and the two move relative to each other, and the lower end of the lifting ring is provided with a pinhole.

[0028] Furthermore, the upper end of the upper positioning ring is provided with a concave positioning notch, the inner ring of the upper positioning ring is provided with a first positioning protrusion protruding inward, and the outer wall of the fixed tube is provided with a positioning plug and a positioning groove, the positioning plug is inserted in the positioning notch, and the first positioning protrusion is clamped in the positioning groove, thereby fixing the upper positioning ring and the fixed tube.

[0029] Furthermore, the diameter of the lower end of the upper positioning ring is smaller than the diameter of the upper end thereof, the lower end of the upper positioning ring extends into the interior of the driving ring, and the lower end of the upper positioning ring is provided with a first barbed hook-shaped positioning boss;

[0030] The spiral groove is formed by a plurality of discontinuously arranged second spiral protrusions on both sides, and the second spiral protrusions are arranged in contact with the inner ring of the driving ring and are clearance-fitted;

[0031] The outer diameter of the driving ring is less than or equal to the outer diameter of the top of the upper positioning ring, the lower end of the driving ring is provided with an arc protrusion, and the outer diameter of the arc protrusion is greater than the outer diameter of the upper end of the driving ring;

[0032] A second positioning notch is provided at the lower end of the upper positioning ring, and a second positioning protrusion is provided at the upper end of the lifting ring. The second positioning protrusion is arranged in the second positioning notch, and the two are arranged to slide up and down.

[0033] Furthermore, the blood collection needle includes a needle and a protective cover, the protective cover includes an integrally formed driving section and a fixed section, the needle passes through the fixed section and is fixed at the center of the fixed section, the driving section is located at the upper end of the fixed section, and the driving section is provided with a hook protrusion, a third positioning protrusion and a thin-walled area; the bottom end of the needle is provided with a sleeve, and the sleeve is a soft rubber structure.

[0034] Furthermore, a third positioning notch is provided on the ring tube, and the third positioning notch can be matched and engaged with a third positioning protrusion on the blood collection needle.

[0035] Furthermore, the protective cover is made of engineering plastic.

[0036] The advantages and positive effects of the present invention are:

[0037] 1. The multi-head lancing pen of the present invention comprises a fixed cylinder, a linear drive component, a rotary drive component, a multi-needle fixing component and a depth adjustment component in sequence, and a plurality of lancing needles are arranged in the multi-needle fixing component. The matching of multiple components can enable the same lancing pen to be used for blood collection on multiple different samples, thereby reducing the replacement frequency, saving time and improving efficiency.

[0038] 2. The linear drive assembly in the present invention is used to press the lancet for blood collection, and the rotary drive assembly is used to replace multiple lancets to ensure that a lancet is used only once, thereby ensuring blood collection safety and avoiding the spread of diseases during blood collection; the depth adjustment assembly is used to adjust the needle withdrawal depth of the lancet, thereby fixing the depth of the lancet piercing the skin to ensure normal use.

[0039] 3. The linear drive assembly of the present invention is provided with a drive rod, a button, a lifting spring and a reset spring. When in use, the blood collection needle can be pressed down to collect blood by pressing the button to drive the drive rod downward. After the needle pierces the skin, the blood collection needle clamped at the bottom of the drive rod moves upward under the elastic force of the lifting spring and the reset spring, thereby retracting the blood collection needle. The blood collection needle can be used and reset, which makes it easy to cooperate with the rotary drive assembly to replace a new blood collection needle for use, ensuring safety.

[0040] 4. The first rotating cylinder in the rotary drive assembly of the present invention is clamped and fixed to the ring cylinder of the multi-needle fixing assembly, and the second rotating cylinder and the ring cylinder form a ratchet and pawl mechanism. When in use, the first rotating cylinder, the ring cylinder and the blood collection needle in the ring cylinder are driven to rotate by rotating the second rotating cylinder, thereby achieving the purpose of replacing a new blood collection needle for use. At the same time, the ratchet and pawl mechanism facilitates the resetting of the operating protrusion, and at the same time, the first stopping claw of the driving cylinder clamps the ring cylinder to prevent the first rotating cylinder and the ring cylinder from rotating in the opposite direction, thereby facilitating the operation of rotating again to replace a new blood collection needle.

[0041] 5. The depth adjustment device in the present invention can adjust the position of the bottom surface of the bottom lifting ring relative to the multi-needle fixing assembly, thereby adjusting the needle withdrawal depth of the blood collection needle and making timely adjustments so that the needle withdrawal depth of the blood collection needle meets the blood collection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of the multi-head lancing device of the present invention;

[0043] Figure 2 This is a schematic diagram of the disassembled structure of the multi-head lancing device of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of the fixed cylinder in the multi-head blood collection device of the present invention. Figure 1 ;

[0045] Figure 4This is a schematic diagram of the structure of the fixed cylinder in the multi-head blood collection device of the present invention. Figure 2 ;

[0046] Figure 5 This is a schematic diagram of the mechanism of the linear drive assembly in the multi-head lancing device of the present invention;

[0047] Figure 6 This is a cross-sectional view of the linear drive assembly in the multi-head lancing device of the present invention;

[0048] Figure 7 This is a schematic diagram of the structure of the drive cylinder in the multi-head blood collection device of the present invention. Figure 1 ;

[0049] Figure 8 This is a schematic diagram of the structure of the drive cylinder in the multi-head blood collection device of the present invention. Figure 2 ;

[0050] Figure 9 This is a schematic diagram of the structure of the button in the multi-head lancing device of the present invention;

[0051] Figure 10 This is a schematic diagram of the structure of the driving rod in the multi-head lancing device of the present invention;

[0052] Figure 11 This is a schematic structural diagram of the rotary drive assembly in the multi-head lancing device of the present invention;

[0053] Figure 12 This is a schematic structural diagram of the first rotating cylinder in the multi-head lancing device of the present invention;

[0054] Figure 13 This is a schematic structural diagram of the second rotating cylinder in the multi-head lancing device of the present invention;

[0055] Figure 14 This is a schematic diagram of the structure of the torsion spring in the multi-head lancing device of the present invention;

[0056] Figure 15 This is a schematic diagram of the assembly of the linear drive component and the rotary drive component in the multi-head lancing device of the present invention;

[0057] Figure 16 This is a schematic structural diagram of a multi-needle fixing assembly in a multi-head lancing device of the present invention;

[0058] Figure 17 This is a schematic diagram of the structure of the fixed needle in the multi-head blood collection pen of the present invention. Figure 1 ;

[0059] Figure 18 This is a schematic diagram of the structure of the fixed needle in the multi-head blood collection pen of the present invention. Figure 2 ;

[0060] Figure 19 This is a schematic diagram of the structure of the outer sleeve in the multi-head blood collection device of the present invention. Figure 1 ;

[0061] Figure 20 This is a schematic diagram of the structure of the outer sleeve in the multi-head blood collection device of the present invention. Figure 2 ;

[0062] Figure 21 This is a schematic diagram of the structure of the blood collection needle in the multi-head blood collection device of the present invention;

[0063] Figure 22 This is a cross-sectional view of the combination of the fixed syringe and the blood collection needle in the multi-head lancing device of the present invention;

[0064] Figure 23 This is a schematic diagram of the structure of the depth adjustment component in the multi-head lancing device of the present invention;

[0065] Figure 24 is a cross-sectional view of the depth adjustment assembly in the multi-head lancing device of the present invention;

[0066] Figure 25 This is a schematic diagram of the structure of the upper positioning ring in the multi-head blood collection device of the present invention. Figure 1 ;

[0067] Figure 26 This is a schematic diagram of the structure of the upper positioning ring in the multi-head blood collection device of the present invention. Figure 2 ;

[0068] Figure 27 This is a schematic diagram of the structure of the drive ring in the multi-head lancing device of the present invention;

[0069] Figure 28 This is a schematic diagram of the structure of the lifting ring in the multi-head lancing device of the present invention;

[0070] Figure 29 yes Figure 24 A magnified view of the structure in the middle;

[0071] Figure 30 is a cross-sectional view of the multi-head lancing device of the present invention;

[0072] Figure 31 This is a schematic diagram of the limiting structure between the driving cylinder, the first rotating cylinder, and the second rotating cylinder in the multi-head lancing device of the present invention;

[0073] In the picture:

[0074] 65-fixing cylinder, 651-first guide groove, 652-first observation window, 653-second observation window, 656-positioning plug, 657-positioning groove, 658-protrusion;

[0075] 1-blood collection needle, 11-needle, 12-protective sleeve, 121-fixed section, 122-driving section, 1221-ear hook protrusion, 1222-second inclined surface, 1223-second horizontal surface, 1224-third positioning protrusion, 1225-thin-wall area, 1226-third inclined surface, 13-head;

[0076] c-multi-needle fixing assembly, 21-fixed needle cylinder, 210-positioning cavity, 211-third positioning notch, 212-sixth positioning protrusion, 2121-barb, 213-seventh positioning protrusion, 2131-shoulder fixing surface, 214-fifth positioning notch, 215-fixing column, 216-ninth positioning protrusion, 217-ring cylinder, 218-first needle hole; 22-outer sleeve, 221-sixth positioning groove, 222-fifth positioning protrusion, 223-seventh positioning groove, 224 height limiting ring, 225-eighth positioning protrusion, 226-isolation boss, 227-tenth positioning protrusion, 228-second needle hole;

[0077] d-depth adjustment assembly, 51-upper positioning ring, 511-first positioning protrusion, 512-first positioning notch, 513-limiting protrusion, 514-first positioning boss, 515-second positioning notch, 52-driving ring, 521-gear adjustment protrusion, 522-first spiral protrusion, 523-arc protrusion, 53-lifting ring, 531-second positioning protrusion, 532-spiral groove, 533-second spiral protrusion, 54-pinhole,

[0078] a- linear drive assembly, 61- driving rod, 612- driving head, 6121- lifting and rotating driving surface, 6122- rotating positioning boss, 613- guiding empty rod, 6131- guiding groove, 615- second positioning claw, 62- driving cylinder, 622- guiding rod, 623- avoiding hole, 624- second guide groove, 6241- vertical groove, 6242- horizontal groove, 625- third limiting groove, 6251- horizontal limiting groove, 626- twelfth positioning protrusion, 6261- the Four limiting grooves, 627 - fourth stop protrusion, 628 - positioning conical cylinder, 6281 - first positioning vertical groove, 6282 - second positioning vertical groove, 6283 - positioning vertical block, 629 - stop cylinder, 6291 - first stop claw, 63 - button, 631 - first positioning claw, 632 - first guide protrusion, 633 - second guide protrusion, 634 - third limiting protrusion, 6341 - fourth limiting protrusion, 635 - driving rib, 64 - lifting spring, 655 - return spring;

[0079] b-rotational drive assembly, 66-torsion spring, 661-first vertical rod, 662-second vertical rod, 67-first rotating cylinder, 671-thirteenth positioning protrusion, 672-first stopping protrusion, 6721-third positioning vertical groove, 6722-second positioning vertical block, 673-fourteenth positioning protrusion, 68-second rotating cylinder, 681-second stopping claw, 682-third positioning vertical block, 69-operating protrusion. DETAILED DESCRIPTION

[0080] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0081] The multi-head lancing pen includes a fixed cylinder 65, a linear drive component a, a rotary drive component b, a multi-needle fixing component c and a depth adjustment component d. The bottom of the fixed cylinder 65 is fixed with the depth adjustment component d. The linear drive component a, the rotary drive component b and the multi-needle fixing component c are all arranged inside the fixed cylinder 65, and the top of the linear drive component a protrudes out of the fixed cylinder 65. The rotary drive component b is arranged between the linear drive component a and the multi-needle fixing component c for controlling the rotation of the multi-needle fixing component c. A plurality of blood collection needles 1 are arranged inside the multi-needle fixing component c, and a drive rod 61 is provided in the linear drive component a for pressing the blood collection needle 1 for blood collection. The fixed cylinder 65 is used to cover and assemble other components. When the linear drive component a is pressed down, it can drive the blood collection needle 1 to penetrate the skin for blood collection. When it is no longer pressed, it drives the blood collection needle 1 back to its original position. The rotary drive component b can rotate the multi-needle fixing component c and the blood collection needle 1, and then change the new blood collection needle 1 to face the linear drive component a, and replace the new blood collection needle for use. The depth adjustment component d can adjust the needle withdrawal depth of the blood collection needle 1, and make timely adjustments to make the needle withdrawal depth of the blood collection needle 1 meet the requirements of blood collection.

[0082] In this embodiment, the fixed cylinder 65 is a hollow cylinder and is provided with a first observation port 652 and a second observation port 653. The first observation port 652 is used to observe the gear position on the surface of the first rotating cylinder 67 to determine which gear position the lancet 1 has been used and whether a new lancet 1 should be replaced. The second observation port 653 facilitates rotating the button 63 to change the position of the lancet 1, facilitating the replacement of a new lancet 1 for use. The outer wall of the fixed cylinder 65 is provided with a positioning block 656 and a positioning groove 657, which facilitate locking and fixing with the upper positioning ring 51, facilitating rapid installation and removal of the depth adjustment assembly d, thereby facilitating replacement of the multi-needle fixing assembly c and the lancet 1. The inner wall of the fixed cylinder 65 is provided with a first guide groove 651 and a protrusion 658. The first guide groove 651 is used to guide and position the button 63 to ensure vertical sliding of the button 63.

[0083] Reference Figure 5 and Figure 6 In this embodiment, the linear drive component a includes a drive rod 61, a drive cylinder 62, a button 63, a lifting spring 64 and a return spring 655. The button 63 is arranged inside the upper end of the fixed cylinder 65 and the two are arranged to slide up and down. The drive cylinder 62 is arranged inside the fixed cylinder 65 and is located at the lower side of the button 63. The drive rod 61 is arranged inside the drive cylinder 62; wherein, the linear drive component a is used to press the blood collection needle 1 at the bottom so that the blood collection needle 1 is penetrated to perform blood collection. During actual use, when the button 63 is pressed, the button 63 slides downward along the fixed cylinder 65, thereby compressing the return spring 655, and then driving the drive rod 61 to slide downward along the drive cylinder 62. The drive rod 61 presses the blood collection needle 1 at the bottom to penetrate the depth adjustment component d at the bottom and then pierce the skin to perform blood collection.

[0084] Reference Figure 6 and Figure 10 As shown, the lower end of the driving cylinder 62 is provided with an annular eleventh positioning protrusion, the driving rod 61 includes an integrated driving head 612 and a guide hollow rod 613, and a lifting spring 64 is clamped between the bottom end of the driving head 612 and the eleventh positioning protrusion. The eleventh positioning protrusion is provided to match the driving head 612 to clamp the lifting spring 64, thereby fixing the position of the lifting spring 64; the lifting spring 64 is sleeved on the outside of the guide hollow rod 613 and is coaxially arranged with the eleventh positioning protrusion; one end of the return spring 655 is clamped on the inner side of the top wall of the button 63, and the other end is clamped on the top of the driving head 612. When the lifting spring 64 and the return spring 655 are pressed for use, the two are compressed, and then the driving rod 61 moves downward to press and move the blood collection needle 1 at the bottom. After that, after the needle tip of the blood collection needle 1 pierces the skin, it is clamped and driven by the driving rod 61 under the action of the return spring 655 and the lifting spring 64 and their own elastic force to be retracted into the fixed cylinder 65, thereby reducing pain.

[0085] Also refer to Figure 6 and Figure 9In this embodiment, a first positioning claw 631 is provided downwardly at the middle position of the top wall of the button 63, and a second positioning claw 615 is provided on the top of the driving head 612. The first positioning claw 631 and the second positioning claw 615 are both two-petal structures, and the two ends of the return spring 655 are respectively clamped in the first positioning claw 631 and the second positioning claw 615; the first positioning claw 631 and the second positioning claw 615 are used to fix the return spring 655. Furthermore, when the button 63 is pressed downward, the driving rib 635 moves along the lifting and rotating driving surface 6121 of the driving rod 61, thereby rotating the driving rod 61 and rotating the rotation positioning boss 6122 out of the second guide groove 624 and into the vertical groove 6241, thereby moving downward. During this process, because both ends of the return spring 655 are engaged in the two-petal structure, the return spring 655 twists with the rotation of the driving rod 61, generating a torsional elastic force. Subsequently, when the driving rod 61 moves upward and returns, when the driving rib 635 is no longer in contact with the lifting and rotating driving surface 6121, the torsional elastic force of the return spring 655 drives the driving rod 61 to rotate again, thereby causing the rotation positioning boss 6122 to be engaged back into the second guide groove 624. Therefore, both ends of the return spring 655 are engaged in the two-petal structure, facilitating the return of the rotation positioning boss 6122.

[0086] Also refer to Figure 6 、 Figure 7 and Figure 8 In this embodiment, the lower end of the driving cylinder 62 is provided with an upwardly extending guide rod 622, the upper end of the guide rod 622 is conical, the guide empty rod 613 is coaxially arranged with the driving head 612, the guide empty rod 613 is arranged at the lower end of the driving head 612 and extends vertically downward, the interior of the guide empty rod 613 is provided with an introduction groove 6131, and the guide rod 622 extends into the introduction groove 6131; the introduction rod 622 is arranged inside the driving cylinder 62 and inserted into the introduction groove 6131 on the guide empty rod 613 at the bottom of the driving rod 61, which is used to guide the driving rod 61, thereby ensuring that the driving rod 61 maintains a straight line movement when moving downward and its axial position does not change.

[0087] Also refer to Figure 6 and Figure 9 In this embodiment, a first guide protrusion 632 is provided on the outer ring of the lower part of the button 63, and an inwardly concave first guide groove 651 is provided on the inner wall of the upper end of the fixing cylinder 65. The first guide protrusion 632 extends into the first guide groove 651 and the two are clearance-fitted; the first guide protrusion 632 slides up and down in the first guide groove 651, which can ensure that the button 63 moves in a straight line when pressed up and down, thereby preventing the button 63 from rotating.

[0088] like Figure 7As shown, the driving cylinder 62 is provided with an avoidance hole 623, and the upper end of the driving cylinder 62 is provided with a twelfth positioning protrusion 626 extending outward, and the twelfth positioning protrusion 626 is provided to resist the fourth limiting protrusion 6341 on the button 63, thereby preventing the button 63 from being separated from the driving cylinder 62, and ensuring that the button 63 and the driving cylinder 62 are always clamped and connected; a fourth stop protrusion 627 is provided in the middle of the outer ring of the driving cylinder 62, and the fourth stop protrusion 627 is corresponding to the first guide groove 651; the fourth stop protrusion 627 is clamped in the first guide groove 651, fixing the axial position of the driving cylinder 62 and the fixed cylinder 65, and ensuring that the driving cylinder 62 does not rotate in the fixed cylinder 65.

[0089] A transverse limiting groove 62514 is also provided on the outside of the driving cylinder 62, and the transverse limiting groove 6251 is arranged corresponding to the protrusion 658 inside the fixed cylinder 65. During assembly, the protrusion 658 produces elastic deformation, and then the protrusion 658 is stuck in the transverse limiting groove 651, thereby realizing the installation of the driving cylinder 62 and the fixed cylinder 65.

[0090] Reference Figure 9 and Figure 7 The lower end of the button 63 is provided with a second guide protrusion 633 and a third limiting protrusion 634 extending downward, and the lower end of the third limiting protrusion 634 is symmetrically provided with fourth limiting protrusions 6341 extending in the circumferential direction. The driving cylinder 62 is provided with a second guide groove 624, a third limiting groove 625, a fourth limiting groove 6261, a vertical groove 6241 and a transverse groove 6242, and the transverse groove 6242 is connected to the vertical groove 6241, wherein the second guide protrusion 633 is inserted into the third limiting groove 625 and the two are clearance-fitted, the third limiting protrusion 634 is attached to the outer wall of the driving cylinder 62, and the fourth limiting protrusion 6341 is located on the lower side of the twelfth positioning protrusion 626, and the width of the third limiting protrusion 634 is less than the distance between two adjacent twelfth positioning protrusions 626. The third limiting groove 625 is used to limit the downward movement depth of the second guide protrusion 633. When the button 63 is pressed downward, the second guide protrusion 633 moves downward until it is locked in the third limiting groove 625 and then stops moving.

[0091] Reference Figure 10 and Figure 9The driving head 612 is provided with a lifting and rotating driving surface 6121 and a rotating positioning boss 6122; the button 63 is provided with a driving rib 635 inside; wherein, the lifting and rotating driving surface 6121 on the driving rod 61 is a wedge-shaped surface, and when the driving rib 635 moves downward, it presses the lifting and rotating driving surface 6121 to cause the driving head 612 to rotate, so that the rotating positioning boss 6122 rotates out of the horizontal groove 6242 and enters the vertical groove 6241 and moves downward along the vertical groove 6241, thereby causing the driving rod 61 to move vertically downward in a straight line. Furthermore, in the initial state, the rotation positioning boss 6122 is set in the horizontal groove 6242 of the driving cylinder 62, and the driving rod 61 does not rotate or move axially. During the descending process, when the lower end of the driving rib 635 contacts the lifting and rotating driving surface 6121 of the driving rod 61, the driving rod 61 starts to rotate, and the rotation positioning boss 6122 rotates out of the corresponding horizontal groove 6242, and then slides downward in the vertical groove 6241 of the driving cylinder 62. When resetting, the lifting spring 64 and the return spring 655 cause the driving rod 61 to retreat axially. When the rotation positioning boss 6122 of the driving rod 61 reaches the top of the driving cylinder 62, the driving rod 61 rotates under the action of the torsional force of the return spring 655, and the rotation positioning boss 6122 rotates into the horizontal groove 6242 of the driving cylinder 62, returning to the initial position and fixing the driving rod 61.

[0092] like Figure 11 As shown: In this embodiment, the rotation drive assembly includes a first rotating cylinder 67, a second rotating cylinder 68, an operating protrusion 69 and a torsion spring 66, Figure 15 The first rotating cylinder 67 is provided at the bottom end of the driving cylinder 62 and is coaxially connected to the driving cylinder 62 for rotation. The second rotating cylinder 68 is provided at the lower end of the first rotating cylinder 67. Figure 7 and Figure 8As shown, the lower end of the driving cylinder 62 is provided with a positioning cone cylinder 628, the upper end of the positioning cone cylinder 628 is provided with a first positioning vertical groove 6281, the lower end of the positioning cone cylinder 628 is provided with a positioning vertical block 6283, and one end surface of the positioning vertical block 6283 is provided with a second positioning vertical groove 6282; the torsion spring 66 is sleeved on the outer ring of the positioning cone cylinder 628, the upper end of the torsion spring 66 is provided with a first vertical rod 661, and the lower end of the torsion spring 66 is provided with a second vertical rod 662. The straight rod 661 is fixedly mounted in the first vertical positioning slot 6281, and the second vertical rod 662 is mounted in the second vertical positioning slot 6282. During assembly, the first vertical rod 661 of the torsion spring 66 is inserted into the first vertical positioning slot 6281, followed by the second vertical rod 662 in the second vertical positioning slot 6282. The first rotating cylinder 67 is then sleeved onto the outside of the driving cylinder 62, followed by the second vertical rod 662 in the third vertical positioning slot 6721. When the second rotating cylinder 68 is rotated, the torsion spring 66 is in a torsion state. Each time the second rotating cylinder 68 is rotated to a certain position, the second stop pawl 68 and the raised portion of the groove on the annular cylinder 217 form a ratchet mechanism, causing the second rotating cylinder 68 to abut against the annular cylinder 217, thereby maintaining stability and preventing the second rotating cylinder 68 from rotating in the opposite direction.

[0093] The fixed cylinder 65 is provided with a first observation port 652 and a second observation port 653, which correspond to the first rotating cylinder 67 and the second rotating cylinder 68, respectively. The operating protrusion 69 is fixedly mounted in the second rotating cylinder 68 and extends through the second observation port 653. The outer wall of the first rotating cylinder 67 is circumferentially marked with gear numbers, making it easy to see which lancet 1 is in use and to judge the progress of its use.

[0094] Reference Figure 12 and Figure 13In addition, the first stopping protrusions 672 are evenly distributed relative to the axis of the stopping cylinder 629, one of the first stopping protrusions 672 is provided with a third positioning vertical groove 6721 passing through, and a second positioning vertical block 6722 is provided on the outer wall of the first stopping protrusion 672, the third positioning vertical groove 6721 is arranged corresponding to the first positioning vertical groove 6281, and the second vertical rod 662 is inserted into the third positioning vertical groove 6721, and the first positioning vertical groove 6281 and the second positioning vertical groove 6282 are both open structures; during assembly, the first vertical rod 661 of the torsion spring 66 is inserted into the first positioning vertical groove 6281, and then the second vertical rod 662 is inserted into the second positioning vertical groove 6282, and then the first rotating cylinder 67 is sleeved on the outside of the driving cylinder 62, and then the second vertical rod 662 is inserted into the third positioning vertical groove 6721. The second rotating cylinder 68 realizes its axial positioning through the shoulder structure inside the fixed cylinder 65. A plurality of thirteenth positioning protrusions 671 extending downward are provided in the middle part of the first rotating cylinder 67, and the thirteenth positioning protrusions 671 are fitted with the upper end surface of the second rotating cylinder 68; a plurality of fourteenth positioning protrusions 673 extending upward are provided at the upper end of the first rotating cylinder 67, and a fourth stop protrusion 627 is provided on the outer ring of the driving cylinder 62, and the upper end surface of the fourteenth positioning protrusion 673 is fitted with the lower end surface of the fourth stop protrusion 627.

[0095] like Figure 16 and Figure 22 As shown, in this embodiment, the multi-needle fixing assembly c includes a fixed syringe 21 and an outer sleeve 22. The fixed syringe 21 and the outer sleeve 22 are arranged coaxially. The outer sleeve 22 is sleeved on the outside of the fixed syringe 21 and is connected to the fixed syringe 21 by a locking mechanism. The fixed syringe 21 includes a fixed column 215 and an annular cylinder 217. The fixed column 215 and the annular cylinder 217 form multiple positioning cavities 210 through a partition. Multiple blood collection needles 1 are placed in the multiple positioning cavities 210. The bottom of the blood collection needles 1 is directly opposite to the first needle outlet hole 218 and the second needle outlet hole 228. The first needle outlet hole 218 and the second needle outlet hole 228 are respectively opened on the bottom wall of the fixed syringe 21 and the bottom wall of the outer sleeve 22. The outer sleeve 22 and the fixed syringe 21 are both made of elastic engineering plastic. The multi-needle fixing assembly c is used to fix and install multiple groups of blood collection needles 1 and cooperate with the rotary drive assembly b to rotate the blood collection needles 1, thereby achieving the purpose of replacing new blood collection needles 1.

[0096] like Figure 17 and 18 As shown, in this embodiment, a plurality of grooves are evenly arranged on the outer wall of the ring cylinder 217 to form a plum blossom shape, and a sixth positioning protrusion 212 and a seventh positioning protrusion 213 are fixedly arranged in each adjacent two grooves, and the sixth positioning protrusion 212 and the seventh positioning protrusion 213 are tilted outward along the radial direction of the fixed needle cylinder 21; Figure 19 and 20As shown, the outer sleeve 22 is provided with a sixth positioning groove 221 and a seventh positioning groove 223 which respectively match the sixth positioning protrusion 212 and the seventh positioning protrusion 213. The sixth positioning groove 221 is a through-hole structure, and the seventh positioning groove 223 is concavely arranged along the radial direction of the outer sleeve 22; wherein, the sixth positioning protrusion 212 is arranged on the upper side of the seventh positioning protrusion 213, and the lower end of the sixth positioning protrusion 212 is provided with an upwardly raised hook 2121, and the seventh positioning protrusion 213 is provided with a shoulder fixing surface 2131; the hook 2121 of the sixth positioning protrusion 212 protrudes out of the sixth positioning groove 221, and a height limiting ring 224 is provided on the groove wall of the seventh positioning groove 223, and the shoulder fixing surface of the seventh positioning protrusion 213 is located on the lower side of the height limiting ring 224. The barb 2121 protrudes from the sixth positioning groove 221, which is used to limit the upper limit position of the fixed syringe 21. The height limiting ring 224 is provided to abut the shoulder fixing surface 2131 of the seventh positioning protrusion 213, thereby fixing the fixed syringe 21 at the lower limit position. When the fixed syringe 21 is assembled with the outer sleeve 22, the barb 2121 protrudes from the ring tube 217 and is arranged radially outward. When the blood collection needle 1 is completely used and removed, the sixth positioning protrusion 212 retracts, at which point the barb 2121 is stuck on the upper end surface of the sixth positioning groove 221. At the same time, the shoulder fixing surface 2131 abuts and cooperates with the limiting ring 224 to achieve axial positioning, thereby preventing the removed blood collection needle 1 from being reused and avoiding reuse.

[0097] like Figure 19 and 20As shown, the inner wall of the outer sleeve 22 is provided with a separation boss 226, which is located below the sixth positioning groove 221. The annular tube 217 is axially limited by multiple separation bosses 226. A fifth positioning boss 222 is provided at the center of the bottom wall of the outer sleeve 22, and a fifth positioning notch 214 is provided on the bottom wall of the fixed syringe 21 to match the fifth positioning boss 222. The fifth positioning boss 222 and the fifth positioning notch 214 are both tapered and have a clearance fit. During installation, the fifth positioning boss 222 is inserted into the fifth positioning notch 214, which can serve as a guide and positioning function, ensuring that the outer sleeve 22 and the fixed syringe 21 quickly match, thereby improving the accuracy and efficiency of assembly. The top of the inner wall of the outer sleeve 22 is provided with multiple eighth positioning bosses 225, and the outer wall of the annular tube 217 is provided with multiple ninth positioning bosses 216, with the eighth positioning boss 225 located above the ninth positioning boss 216. When assembled, the eighth positioning projection 225 is positioned above the ninth positioning projection 216, utilizing the principle of elasticity to achieve axial positioning of the outer sleeve 22 and the fixed syringe 21. Tenth positioning projections 227 are positioned adjacent to each sixth positioning groove 221 in the vertical direction, with the two tenth positioning projections 227 symmetrically positioned about the sixth positioning groove 221. The tenth positioning projections 227 serve two purposes: firstly, to increase the strength of the outer sleeve 22, thereby preventing the outer sleeve 22 from weakening at the sixth positioning groove 221; and secondly, to provide guidance and positioning during installation of the lancet assembly, thereby improving assembly accuracy.

[0098] In addition, in this embodiment, the outer ring of the stop cylinder 629 is provided with a first stop claw 6291, and the lower end of the first rotating cylinder 67 is provided with a plurality of first stop protrusions 672. The first stop claw 6291 is clamped on the cavity wall of the upper part of the positioning cavity 210, and the first stop protrusion 672 is inserted into the groove of the outer ring of the ring cylinder 217, which is used to clamp and fix the first rotating cylinder 67 and the ring cylinder 217. The first stop claw 6291 is clamped on the upper part of the positioning cavity 210. The claw end of the first stop claw 6291 on the cavity wall is used to limit the groove inside the ring cylinder 217, thereby preventing the multi-needle fixing assembly c from rotating in the opposite direction after rotation; the second rotating cylinder 68 is provided with a third positioning vertical block 682 and a number of evenly distributed second stop claws 681, and the second stop claws 681 and the raised position of the groove on the ring cylinder 217 form a ratchet and pawl mechanism, and the inner wall of the third positioning vertical block 682 is arranged to fit the outer wall of the thirteenth positioning protrusion 671. The ratchet pawl mechanism can clamp the second rotating cylinder 68 and the annular cylinder 217. When the operating protrusion 69 is rotated, the second rotating cylinder 68 drives the first rotating cylinder 67 and the annular cylinder 217 to rotate, so that the new blood collection needle 1 is placed opposite to the needle outlet hole 54. At this time, the operating protrusion 69 is rotated back to its original position. The ratchet pawl mechanism causes the second rotating cylinder 68 to rotate in the opposite direction, and the first stop claw 6291 clamps the annular cylinder 217. Therefore, the annular cylinder 217 and the blood collection needle 1 do not rotate, thereby facilitating the next rotation operation. In addition, as the first rotating cylinder 67 and the ring cylinder 217 continue to rotate, when the blood collection needle 1 is completely used, the second positioning vertical block 6722 of the first rotating cylinder 67 is engaged with the third positioning vertical block 682 of the second rotating cylinder 68. At the same time, the top of the second positioning vertical block 6722 of the first rotating cylinder 67 is engaged with the positioning vertical block 6283 of the driving cylinder 62. Therefore, the driving cylinder 62, the first rotating cylinder 67 and the second rotating cylinder 68 are all stuck, so that the blood collection pen can no longer rotate. The schematic diagram of this limiting structure is shown in FIG. Figure 31 As shown; that is, the blood collection needle 1 needs to be replaced at this time, and this matching setting can also prevent the blood collection needle 1 from being reused to ensure safety.

[0099] like Figure 23-28 As shown, in this embodiment, the depth adjustment assembly includes a coaxially arranged upper positioning ring 51, a driving ring 52 and a lifting ring 53, the lower outer ring of the upper positioning ring 51 is provided with a limiting protrusion 513, the upper end of the inner ring of the driving ring 52 is provided with a plurality of gear adjustment protrusions 521, the limiting protrusions 513 are arranged corresponding to the gear adjustment protrusions 521, the lower end of the inner ring of the driving ring 52 is provided with a first spiral protrusion 522, the lifting ring 53 is sleeved in the driving ring 52, the outer ring of the lifting ring 53 is provided with a spiral groove 532, the first spiral protrusion 522 is provided in the spiral groove 532 and the two move relative to each other, and the lower end of the lifting ring 53 is provided with a pinhole 54.

[0100] like Figure 25 and 26 As shown, the upper end of the upper positioning ring 51 is provided with a concave positioning notch 512, and the inner ring of the upper positioning ring 51 is provided with a first positioning protrusion 511 protruding inward, the positioning plug 656 on the fixed cylinder 65 is inserted into the positioning notch 512, and the first positioning protrusion 511 is clamped in the positioning groove 657 on the fixed cylinder 65, thereby fixing the upper positioning ring 51 and the fixed cylinder 65.

[0101] Among them, the upper positioning ring 51, the drive ring 52 and the lifting ring 53 are all made of engineering plastics, which facilitates the matching and snap-in connection between parts, simplifies the matching structure and assembly process, and reduces costs. The above-mentioned engineering plastics include but are not limited to polyamide, polycarbonate, polyformaldehyde, ABS resin, and polytetrafluoroethylene.

[0102] The diameter of the lower end of the upper positioning ring 51 is smaller than the diameter of the upper end thereof, and the lower end of the upper positioning ring 51 extends into the interior of the driving ring 52, and the lower end of the upper positioning ring 51 is provided with a barbed first positioning boss 514; during actual installation, due to the use of engineering plastics, it has a certain elasticity, and the upper positioning ring 51 is locked and penetrates into the upper end of the driving ring 52, forming a groove body between adjacent gear adjustment protrusions 521. At this time, the limiting protrusion 513 is stuck in the above-mentioned groove body, and at the same time, the first positioning boss 514 contacts the step structure formed at the bottom of the gear adjustment protrusion 521, ensuring the coordinated positioning of the upper positioning ring 51 and the driving ring 52 in the axial direction, with a simple structure and stable and reliable.

[0103] The spiral groove 532 is composed of a plurality of intermittently arranged second spiral protrusions 533 on both sides. The second spiral protrusions 533 are in contact with the inner ring of the drive ring 52 and are clearance-fitted, which avoids the shaking of the drive ring 52 and improves stability; the outer diameter of the drive ring 52 is less than or equal to the outer diameter of the top of the upper positioning ring 51, and the lower end of the drive ring 52 is provided with an arc protrusion 523, and the outer diameter of the arc protrusion 523 is larger than the outer diameter of the upper end of the drive ring 52; first, it is beautiful, second, it avoids scratching the operator and improves safety, and third, it is easy to pull out; the first spiral protrusion 522 is segmented and the second spiral protrusion 533 is also segmented, which is convenient for the installation and assembly of the two. Since both are made of engineering plastics, when they are installed in sections, they can be screwed together and then set. In this way, after the assembly is completed, it is not easy to disassemble, the structure is stable, and it can be disassembled only after damage, and the service life is long.

[0104] A second positioning notch 515 is provided at the lower end of the upper positioning ring 51, and a second positioning protrusion 531 is provided at the upper end of the lifting ring 53. The second positioning protrusion 531 is disposed within the second positioning notch 515, and the two are arranged to slide up and down. This prevents relative rotation between the upper positioning ring 51 and the lifting ring 53. When the drive ring 52 is rotated, the lifting ring 53 moves axially under the action of the spiral groove 532. The up and down movement of the second positioning protrusion 531 within the second positioning notch 515 converts the rotation of the first spiral protrusion 522 within the spiral groove 532 into linear up and down motion of the lifting ring 53. At the same time, the two ends of the spiral groove 532 are not connected but sealed, which helps limit the up and down movement distance of the lifting ring 53 and also limits the rotation angle of the lifting ring 53.

[0105] like Figure 21 As shown, the blood collection needle 1 includes a needle 11 and a protective sleeve 12. The protective sleeve 12 includes an integrally formed driving section 122 and a fixed section 121. The needle 11 passes through the fixed section 121 and is fixed at the center of the fixed section 121. The driving section 122 is located at the upper end of the fixed section 121. The driving section 122 is provided with an ear hook protrusion 1221, a third positioning protrusion 1224 and a thin-walled area 1225; the bottom end of the needle 11 is provided with a sleeve 13, which is a soft rubber structure.

[0106] The thin-walled area 1225 is located at the upper end of the fixed section 121 and is concave outward; the ear-hanging protrusion 1221 is provided with a second inclined surface 1222 and a second horizontal surface 1223; the lower end of the driving rod 61 is provided with a fourth positioning protrusion, and the fourth positioning protrusion is provided with a first inclined surface and a first horizontal surface.

[0107] In this embodiment, the ring barrel 217 is provided with a third positioning notch 211, which is adapted to engage with the third positioning protrusion 1224 on the lancet 1. Initially, the third positioning protrusion 1224 is positioned within the third positioning notch 211. When the drive rod 61 moves downward, the fourth positioning protrusion is not in contact with the hook protrusion 1221. The protective sleeve 12 deforms in the thin-walled region 1225, bending toward the central axis and extending the needle 11. When the drive rod 61 moves upward, the deformation of the thin-walled region 1225 causes the first horizontal surface to contact the second horizontal surface, causing the fourth positioning protrusion to engage with the hook protrusion 1221, thereby driving the protective sleeve 12 upward and retracting the needle 11.

[0108] Furthermore, the protective cover 12 is made of engineering plastic.

[0109] The specific use process of the blood collection pen of the present invention is as follows:

[0110] 1. When you need to use the lancing pen for blood collection: refer to Figure 30 ,

[0111] The linear drive assembly a can be directly used to extend the blood collection needle 1 out of the bottom of the blood collection pen for normal blood collection.

[0112] First, a person manually presses the button 63, and the button 63 moves downward as a whole. At this time, the driving rib 635 inside the button 63 moves along the lifting and rotating driving surface 6121 of the driving rod 61, thereby rotating the driving rod 61 so that the rotating positioning boss 6122 is rotated out of the horizontal groove 6242 and enters the vertical groove 6241. Due to the pressure of the return spring 655, the driving rod 61 is immediately launched downward, that is, the rotating positioning boss 6122 moves vertically along the vertical groove 6241, and then the driving rod 61 gradually contacts the driving section 122 of one of the blood collection needles 1 at the bottom, thereby pressing The blood collection needle 1 moves downward, and the third positioning protrusion 1224 in the blood collection needle 1 slides down from the third positioning notch 211. At this time, the third positioning protrusion 1224 slides downward along the inner wall of the ring tube 217, and the driving section 122 of the blood collection needle 1 bends along the thin-walled area 1225 toward the center of the ring tube 217. Then, the blood collection needle 1 moves downward under the drive of the driving rod 61 until it passes through the first needle outlet hole 218, the second needle outlet hole 228 and the needle outlet hole 54 in sequence, and then pierces the skin for blood collection. During this process, the lifting spring 64 and the return spring 655 are compressed and have elastic force.

[0113] Secondly, after the blood collection needle 1 pierces the skin, the driving rod 61 moves upward under the elastic force of the lifting spring 64 and the return spring 655. Since the driving section 122 of the blood collection needle 1 is in a bent state at this time, as the driving rod 61 moves upward, the fourth positioning protrusion at the bottom of the driving rod 61 engages with the ear protrusion 1221 of the blood collection needle 1, thereby driving the blood collection needle 1 to move upward at the same time, and retracting the blood collection needle 1 until the third positioning protrusion 1224 of the blood collection needle 1 reaches the third positioning notch 211 After being stuck in the third positioning notch 211, the driving section 122 of the blood collection needle 1 returns to the vertical state, and the blood collection needle 1 is fixed in the positioning cavity 210 of the multi-needle fixing assembly c again, and the driving rod 61 continues to move upward until the lifting spring 64 and the return spring 655 are in a relatively balanced state. When the button 63 is no longer pressed, the driving rod 61 continues to move upward until the rotation positioning protrusion 6112 of the driving rod 61 is stuck in the horizontal groove 6242 again, that is, it returns to its original position.

[0114] 2. When a new blood collection needle 1 is needed:

[0115] Each lancet 1 can only be used once. When one of the lancets 1 is restored to its original position after use, the rotary drive assembly b needs to be operated to rotate the multi-needle positioning assembly c and the lancet 1 so that a new, unused lancet 1 is positioned corresponding to the needle hole 54 and the drive rod 61. The specific operation is as follows:

[0116] First, manually rotate the operating protrusion 69, which drives the second rotating cylinder 68 to rotate. Since the second stop claw 681 is locked in the groove of the ring cylinder 217, the ring cylinder 217 and the first rotating cylinder 67 are driven to rotate. When the operating protrusion 69 reaches the other end of the second observation window, the new blood collection needle 1 is positioned with the needle outlet 54. At this time, the first stop claw 6291 on the driving cylinder 62 is locked in the groove of the ring cylinder 217, thereby preventing the ring cylinder 217 from rotating in the opposite direction.

[0117] Secondly, manually rotate the operating protrusion 69 so that the operating protrusion 69 returns to the initial end. At this time, the second rotating cylinder 68 returns to its original position, and the ring cylinder 217 does not rotate under the fixing action of the first stop claw 6291, thereby avoiding the problem of repeated use of the blood collection needle 1 and ensuring safety.

[0118] 3. When all the blood collection needles 1 have been used, the steps for replacing the new blood collection needles 1 and the multi-needle fixing assembly c are as follows:

[0119] When all the blood collection needles 1 have been used, the driving cylinder 62, the first rotating cylinder 67 and the second rotating cylinder 68 are locked together so that the blood collection pen cannot rotate. Figure 31 As shown, the use condition of the lancet 1 can also be judged by observing the gear number on the first rotating cylinder 67 through the first observation window 652. At this time, the lancet 1 needs to be replaced. The replacement operation is as follows:

[0120] First, unplug the depth adjustment component d;

[0121] Next, remove the multi-needle fixing assembly C with multiple blood collection needles 1. At this time, the torsion spring 66 rotates one circle until it abuts and fixes against the end of the positioning vertical block away from the second positioning vertical groove 6282. At this time, the torsion spring 66 is in a squeezed state ready for installation.

[0122] Next, install the multi-needle fixing assembly c with the new blood collection needle 1 installed, and insert the first stop protrusion 672 on the first rotating cylinder 67 into the grooves of different ring cylinders 217 in sequence, and then adjust them to the appropriate position to complete the replacement;

[0123] Afterwards, the depth adjustment assembly d is snap-fitted and fixed to the fixing tube 65 again to complete the replacement and can be continued to be used.

[0124] 4. Set the depth adjustment component d to adjust the needle withdrawal depth of the blood collection needle 1:

[0125] By rotating the lifting ring 53, the height of the lifting ring 53 can be changed, thereby adjusting the height of the blood collection needle 1 passing through the needle hole 54. Use the first blood collection needle 1 to press and observe its normal needle outlet height. If it is too long, the lifting ring 53 needs to be lowered, and if it is too short, the lifting ring 53 needs to be raised.

[0126] The above detailed description of the specific embodiments of the present invention is intended to be a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. Multi-head lancing device, characterized by: It comprises a fixed cylinder (65), a linear drive component (a), a rotary drive component (b), a multi-needle fixed component (c) and a depth adjustment component (d), wherein the bottom of the fixed cylinder (65) is fixedly engaged with the depth adjustment component (d), the linear drive component (a), the rotary drive component (b) and the multi-needle fixed component (c) are all arranged inside the fixed cylinder (65), and the top end of the linear drive component (a) protrudes out of the fixed cylinder (65), the rotary drive component (b) is arranged between the linear drive component (a) and the multi-needle fixed component (c) for controlling the rotation of the multi-needle fixed component (c), a plurality of blood collection needles (1) are arranged inside the multi-needle fixed component (c), and a drive rod (61) is arranged inside the linear drive component for pressing the blood collection needle (1) to collect blood; The linear drive assembly (a) comprises a drive rod (61), a drive cylinder (62), a button (63), a lifting spring (64) and a return spring (655), wherein the button (63) is arranged inside the upper end of the fixed cylinder (65) and the two are arranged to slide up and down, the drive cylinder (62) is arranged inside the fixed cylinder (65) and is located below the button (63), and the drive rod (61) is arranged inside the drive cylinder (62); An eleventh annular positioning protrusion is provided at the lower end of the interior of the driving cylinder (62); the driving rod (61) includes an integrated driving head (612) and a guide rod (613); a lifting spring (64) is clamped between the bottom end of the driving head (612) and the eleventh positioning protrusion; the lifting spring (64) is sleeved on the outside of the guide rod (613) and is coaxially arranged with the eleventh positioning protrusion; one end of the return spring (655) is clamped on the inner side of the top wall of the button (63), and the other end is clamped on the top of the driving head (612); The rotary drive assembly (b) comprises a first rotary cylinder (67), a second rotary cylinder (68), an operating protrusion (69) and a torsion spring (66), wherein the first rotary cylinder (67) is arranged at the bottom end of the driving cylinder (62) and is coaxially connected to the driving cylinder (62), and the second rotary cylinder (68) is arranged at the lower end of the first rotary cylinder (67); a positioning conical cylinder (628) is provided at the lower end of the driving cylinder (62), and a first positioning vertical groove (6281) is provided at the upper end of the positioning conical cylinder (628). ) is provided with a positioning vertical block at the lower end thereof, a second positioning vertical slot (6282) is provided on one end surface of the positioning vertical block, the torsion spring (66) is sleeved on the outer ring of the positioning conical cylinder (628), the upper end of the torsion spring (66) is provided with a first vertical rod (661), the lower end of the torsion spring (66) is provided with a second vertical rod (662), the first vertical rod (661) is fixedly mounted in the first positioning vertical slot (6281), and during initial assembly, the second vertical rod (662) is mounted in the second positioning vertical slot (6282) for easy assembly; The fixed cylinder (65) is provided with a first observation port (652) and a second observation port (653), the first observation port (652) and the second observation port (653) respectively corresponding to the first rotating cylinder (67) and the second rotating cylinder (68), the operating protrusion (69) is fixedly installed in the second rotating cylinder (68), and the operating protrusion (69) is arranged through the second observation port (653), and the outer wall of the first rotating cylinder (67) is provided with gear numbers in sequence.

2. The multi-head lancing device according to claim 1, characterized in that: The multi-needle fixing assembly (c) comprises a fixed syringe (21) and an outer sleeve (22), wherein the fixed syringe (21) and the outer sleeve (22) are coaxially arranged, and the outer sleeve (22) is sleeved on the outside of the fixed syringe (21) and is connected to the fixed syringe (21) by a clamping connection; the fixed syringe (21) comprises a fixed column (215) and an annular cylinder (217), wherein the fixed column (215) and the annular cylinder (217) form a plurality of positioning cavities through a partition plate. (210), a plurality of the blood collection needles (1) are placed in a plurality of the positioning cavities (210), and a first needle outlet hole (218) and a second needle outlet hole (228) are arranged opposite to the bottom of the blood collection needle (1), and the first needle outlet hole (218) and the second needle outlet hole (228) are respectively opened on the bottom wall of the fixed syringe (21) and the bottom wall of the outer sleeve (22); the outer sleeve (22) and the fixed syringe (21) are both made of elastic engineering plastic.

3. The multi-head lancing device according to claim 2, characterized in that: The outer wall of the ring cylinder (217) is evenly provided with a plurality of grooves to form a plum blossom shape, and a sixth positioning protrusion (212) and a seventh positioning protrusion (213) are fixedly provided in each two adjacent grooves, respectively, and the sixth positioning protrusion (212) and the seventh positioning protrusion (213) are tilted outward along the radial direction of the fixed needle cylinder (21); The outer sleeve (22) is provided with a sixth positioning groove (221) and a seventh positioning groove (223) respectively matching the sixth positioning protrusion (212) and the seventh positioning protrusion (213), wherein the sixth positioning groove (221) is a through-hole structure, and the seventh positioning groove (223) is concavely arranged along the radial direction of the outer sleeve (22); An isolation boss (226) is provided on the inner wall of the outer sleeve (22), and the isolation boss (226) is provided below the sixth positioning groove (221). The annular sleeve (217) is axially limited by the plurality of isolation bosses (226).

4. The multi-head lancing device according to claim 3, characterized in that: The lower end of the positioning conical cylinder (628) is provided with a stop cylinder (629), and the outer ring of the stop cylinder (629) is provided with a first stop claw (6291). The lower end of the first rotating cylinder (67) is provided with a plurality of first stop protrusions (672). The first stop claw (6291) is clamped on the cavity wall of the upper part of the positioning cavity (210), and the first stop protrusion (672) is inserted into the groove of the outer ring of the ring cylinder (217). The second rotating cylinder (68) is provided with a second stop claw (681), and the second stop claw (681) and the protruding position of the groove on the ring cylinder (217) form a ratchet and pawl mechanism.

5. The multi-head lancing device according to claim 4, characterized in that: The depth adjustment assembly comprises an upper positioning ring (51), a driving ring (52) and a lifting ring (53) which are coaxially arranged. The lower outer ring of the upper positioning ring (51) is provided with a limiting protrusion (513). The upper end of the inner ring of the driving ring (52) is provided with a plurality of gear adjustment protrusions (521). The limiting protrusions (513) are arranged corresponding to the grooves formed by adjacent gear adjustment protrusions (521). The lower end of the inner ring of the driving ring (52) is provided with a first spiral protrusion (522). The lifting ring (53) is sleeved in the driving ring (52). The outer ring of the lifting ring (53) is provided with a spiral groove (532). The first spiral protrusion (522) is arranged in the spiral groove (532) and the two move relative to each other. The lower end of the lifting ring (53) is provided with a pinhole (54).

6. The multi-head lancing device according to claim 5, characterized in that: The upper end of the upper positioning ring (51) is provided with a concave positioning notch (512), the inner ring of the upper positioning ring (51) is provided with a first positioning protrusion (511) protruding inward, and the outer wall of the fixed cylinder (65) is provided with a positioning plug (656) and a positioning groove (657), the positioning plug (656) is inserted into the positioning notch (512), and the first positioning protrusion (511) is clamped in the positioning groove (657), thereby fixing the upper positioning ring (51) and the fixed cylinder (65).

7. The multi-head lancing device according to claim 5, characterized in that: The blood collection needle (1) comprises a needle (11) and a protective sleeve (12), the protective sleeve (12) comprises an integrally formed driving section (122) and a fixed section (121), the needle (11) passes through the fixed section (121) and is fixed at the center of the fixed section (121), the driving section (122) is located at the upper end of the fixed section (121), and the driving section (122) is provided with a hook protrusion (1221), a third positioning protrusion (1224) and a thin-walled area (1225); the bottom end of the needle (11) is provided with a sleeve (13), and the sleeve (13) is a soft rubber structure; the ring tube (217) is provided with a third positioning notch (211), and the third positioning notch (211) is matched and snap-fitted with the third positioning protrusion (1224) on the blood collection needle (1); in the initial state, the third positioning protrusion (1224) is placed in the third positioning notch (211) When the driving rod (61) moves downward, the fourth positioning protrusion does not contact the ear-hanging protrusion (1221), the protective sleeve (12) is deformed in the thin-walled area (1225), and the protective sleeve (12) is bent toward the central axis, thereby achieving the extension of the needle (11). When the driving rod (61) moves upward, due to the deformation of the thin-walled area (1225), the first horizontal plane contacts the second horizontal plane, so that the fourth positioning protrusion is engaged with the ear-hanging protrusion (1221), thereby driving the protective sleeve (12) to move upward, thereby achieving the retraction of the needle (11).

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