An automatic needle-changing multi-needle blood collection pen

Abstract

The present invention provides an automatic needle-changing multi-needle blood collection pen, comprising a fixed cylinder, a needle-extraction drive structure, a depth adjustment component and a multi-needle fixed component. The bottom of the fixed cylinder is fixedly engaged with the depth adjustment component, the needle-extraction drive structure and the multi-needle fixed component are installed inside the fixed cylinder, and the top of the needle-extraction drive structure is arranged to pass through the fixed cylinder. A plurality of blood collection needles are arranged in the multi-needle fixed component, and a drive rod for driving the blood collection needle to move up and down is arranged in the needle-extraction drive structure, so as to facilitate pressing the blood collection needle to perform blood collection. The multi-needle fixed component of the multi-head blood collection 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; its needle-extraction drive structure automatically replaces the blood collection needle when returning from blood collection use without the need for manual replacement, thereby improving work efficiency.

Description

Technical Field

[0001] The invention belongs to the field of blood collection equipment, and in particular relates to an automatic needle-changing multi-needle 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] The problem to be solved by the present invention is to provide an automatic needle-changing multi-needle lancing pen. A plurality of lancing needles are arranged in the multi-needle fixing assembly of the multi-head lancing pen, which can be used to increase the number of uses, reduce the replacement frequency, and improve the efficiency of blood collection work; its needle-extraction drive structure automatically replaces the lancing needle when returning from blood collection, without the need for manual replacement again, thereby improving work efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic needle-changing multi-needle blood collection pen, including a fixed cylinder, a needle-out driving structure, a depth adjustment component and a multi-needle fixing component. The bottom of the fixed cylinder is fixed with the depth adjustment component, the needle-out driving structure and the multi-needle fixing component are installed inside the fixed cylinder and the top of the needle-out driving structure is arranged to pass through the fixed cylinder. A plurality of blood collection needles are arranged in the multi-needle fixing component, and a driving rod for driving the blood collection needle to move up and down is provided in the needle-out driving structure, so as to facilitate pressing the blood collection needle to perform blood collection.

[0006] Furthermore, the needle-extraction drive structure includes a pressing and moving component and a rotating and positioning component, and the pressing and moving component can drive the rotating and positioning component to rotate by moving up and down;

[0007] The press-and-move assembly includes a button, a return spring, a drive rod, a lifting spring, a drive cylinder, and a transition cylinder. The drive rod includes a drive head at the top and a drive portion at the bottom. The top and bottom ends of the return spring are respectively clamped at the center of the top wall of the button and the top of the drive head. The lifting spring is sleeved on the outside of the drive portion and its two ends are respectively located at the bottom of the drive head and in the clamping groove in the drive cylinder.

[0008] Two sets of pressing strips are symmetrically arranged at the bottom of the button, and a guide column is provided on the inner wall of the bottom of the pressing strip. The driving cylinder is located below the button and the pressing strip is sleeved on the outside of the driving cylinder. The driving rod is located on the inner side of the driving cylinder. A transition cylinder is sleeved on the outer side of the bottom of the driving cylinder, and the transition cylinder contacts the bottom wall of the limiting ring on the outer wall of the driving cylinder.

[0009] The rotation positioning assembly includes a first rotating ring, a second rotating ring and a third rotating limiting ring, wherein the first rotating ring, the second rotating ring and the third rotating limiting ring are coaxially arranged from top to bottom, the first rotating ring and the second rotating ring are plugged in for position fixing, and a positioning arc plate is provided on the top of the third rotating limiting ring, wherein the positioning arc plate is inserted in the second rotating ring and is tightly arranged against the inner wall of the second rotating ring;

[0010] Two symmetrically arranged rotating grooves are provided on the outer wall of the first rotating ring, and the guide posts at the bottom of the two pressing strips are respectively clamped in the two rotating grooves. Two symmetrically arranged second rotating grooves are provided on the outer wall of the second rotating ring, and the two second rotating grooves are arranged opposite to the bottom of the rotating groove. Two parallel sliding grooves are provided in the circumferential direction of the outer wall of the second rotating ring, and a vertical sliding groove is provided on the groove wall at the center position of the sliding groove. A slider is slidably connected in the sliding groove, and a sliding button is also slidably connected to the slider;

[0011] The outer wall of the third rotation limiting ring is provided with a plurality of positioning grooves on its circumference, wherein the second rotation groove and the sliding groove are respectively connected to a corresponding positioning groove.

[0012] Furthermore, a card block is provided on the bottom wall of the slide groove, a protrusion is provided on the bottom side end of the card block, and two grooves that can be fixed with the card block are provided on the bottom wall of the slider, namely the first groove and the second groove. A sliding groove is provided on the top wall of the slider, and the sliding button is an arc-shaped plate with a shift block provided on the top wall. A sliding slider is provided on the bottom wall of the sliding button, and the sliding slider is inserted into the sliding groove.

[0013] Furthermore, the length of the sliding slider is less than or equal to the width of the slider, and the width of the sliding slider is less than the width of the sliding groove.

[0014] Furthermore, a plurality of positioning posts are provided on the bottom wall of the first rotating ring, and a plurality of positioning grooves are provided on the top wall of the second rotating ring, and the positioning posts are inserted into the positioning grooves.

[0015] Furthermore, the transition cylinder includes an integrally formed first cylinder, a second cylinder, a third necked cylinder and a fourth cylinder from top to bottom, the second cylinder, the third necked cylinder and the fourth cylinder are inserted into the first rotating ring and the second rotating ring, and the first cylinder is located between the first rotating ring and the limit ring.

[0016] Furthermore, a plurality of protrusions are provided on the circumference of the inner wall of the fourth cylinder, one of the protrusions is provided with a through hole and the top of the protrusion is connected to a limiting vertical block; a positioning cylinder is provided at the bottom of the driving cylinder, the bottom of the positioning cylinder is fixedly connected to the limiting cylinder, a first limiting groove is provided at the bottom of the side wall of the driving cylinder, a limiting block is provided at the bottom of the positioning cylinder, an open second limiting groove is provided on one side of the limiting block, a torsion spring is provided on the outer side of the limiting cylinder, the first end of the torsion spring is clamped in the first limiting groove, and the second end of the torsion spring is inserted in the through hole of the transition cylinder.

[0017] Furthermore, a first observation window, a second observation window, a first positioning block and a second positioning groove are provided on the outer wall of the fixed cylinder, and two first positioning grooves and two second positioning grooves are provided on the inner wall of the fixed cylinder in a vertically symmetrical manner. The first observation window is provided opposite to the sliding button b, and the shift block b is provided through the second observation window.

[0018] The pressing bar is disposed in the first positioning groove and is slidably connected up and down along the first positioning groove;

[0019] Two second positioning blocks are symmetrically arranged on the outer wall of the driving cylinder, and the two second positioning blocks are respectively clamped in the two second positioning grooves.

[0020] Furthermore, a driving movable groove is vertically provided on the driving cylinder, and a driving positioning groove is also connected to the top of the driving movable groove; a positioning block is provided on the outer wall of the driving head of the driving rod, and the positioning block is clamped in the driving positioning groove; a positioning rod is provided at the center position of the limiting cylinder, a positioning through hole is opened in the driving part, the top of the positioning rod is inserted in the positioning through hole, and a through groove for the driving part to pass through is provided on the driving cylinder.

[0021] Furthermore, a first clamping jaw is provided inside the top wall of the button, a rib is provided on the inner wall of the button, a second clamping jaw is provided on the top of the driving head, two ends of the return spring are respectively clamped in the first clamping jaw and the second clamping jaw, a rotating inclined plane is provided on the driving head, and the rib is provided directly above the rotating inclined plane;

[0022] The button is provided with two symmetrical movement limiting blocks, the driving cylinder is provided with a movement limiting groove, and a second limiting ring is provided on the side wall of the driving cylinder and is located at the bottom of the movement limiting groove.

[0023] 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.

[0024] 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;

[0025] 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;

[0026] 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.

[0027] 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.

[0028] 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;

[0029] 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;

[0030] 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;

[0031] 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.

[0032] Furthermore, a second positioning claw is provided on the limiting cylinder, and a plurality of first positioning claws are evenly provided on the inner wall of the third rotation limiting ring. The second positioning claw and the first positioning claw are both arranged corresponding to the groove of the outer wall of the ring cylinder and the end face is clamped with the groove of the ring cylinder; and the raised position of the first positioning claw and the groove of the outer wall of the ring cylinder forms a ratchet pawl mechanism.

[0033] 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.

[0034] 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.

[0035] 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;

[0036] 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;

[0037] 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;

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The advantages and positive effects of the present invention are:

[0042] 1. The multi-head lancing pen of the present invention comprises a fixed cylinder, a needle-extraction driving structure, a depth adjustment component and a multi-needle fixing component in sequence, and a plurality of lancing needles are arranged in the multi-needle fixing component, which reduces the replacement frequency of the lancing needles, saves time and improves efficiency.

[0043] 2. The needle-extraction drive structure of the present invention includes a pressing and moving component and a rotating and positioning component. When in use, the pressing and moving component can knock out the blood collection needle to realize the blood collection function. At the same time, the pressing and moving component cooperates with the rotating and positioning component to return to realize the automatic needle replacement function. There is no need to manually replace the needle again, which improves work efficiency and is convenient to use.

[0044] 3. The rotary positioning assembly of the present invention can change the different states of the blood collection pen through the slider and the sliding button. When used for the first time, it is switched to the debugging state to adjust the needle length of the blood collection needle to meet the blood collection requirements, and then switched to the use state for use. It is easy to operate and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a combined structural diagram of an automatic needle-changing multi-needle blood collection device of the present invention;

[0046] Figure 2 This is a disassembled diagram of an automatic needle-changing multi-needle lancing device of the present invention;

[0047] Figure 3 This is a cross-sectional view of an automatic needle-changing multi-needle lancing device according to the present invention;

[0048] Figure 4 This is a combined structural diagram of the needle-extracting drive structure of an automatic needle-changing multi-needle blood collection device of the present invention;

[0049] Figure 5 This is a disassembled diagram of the needle-extraction drive structure of an automatic needle-changing multi-needle blood collection device of the present invention;

[0050] Figure 6 This is a schematic diagram of the structure of the fixed cylinder in the automatic needle-changing multi-needle blood collection device of the present invention. Figure 1 ;

[0051] Figure 7 This is a schematic diagram of the structure of the fixed cylinder in the automatic needle-changing multi-needle blood collection device of the present invention. Figure 2 ;

[0052] Figure 8 This is a schematic structural diagram of a driving rod in an automatic needle-changing multi-needle blood collection device of the present invention;

[0053] Figure 9 This is a schematic diagram of the assembly of a driving rod, a return spring, and a lifting spring in an automatic needle-changing multi-needle lancing device of the present invention;

[0054] Figure 10 This is a structural diagram of a button in an automatic needle-changing multi-needle lancing device of the present invention;

[0055] Figure 11 This is a schematic structural diagram of a drive cylinder in an automatic needle-changing multi-needle blood collection device of the present invention;

[0056] Figure 12 This is a cross-sectional view of a drive cylinder in an automatic needle-changing multi-needle lancing device of the present invention;

[0057] Figure 13 This is an assembly diagram of the drive cylinder, transition cylinder and rotation positioning component in an automatic needle-changing multi-needle lancing device of the present invention;

[0058] Figure 14 yes Figure 13 sectional view of

[0059] Figure 15 This is a schematic diagram of the structure of the transition tube in the automatic needle-changing multi-needle blood collection device of the present invention. Figure 1 ;

[0060] Figure 16 This is a schematic diagram of the structure of the transition tube in the automatic needle-changing multi-needle blood collection device of the present invention. Figure 2 ;

[0061] Figure 17 This is a structural schematic diagram of a rotary positioning assembly in an automatic needle-changing multi-needle lancing device of the present invention;

[0062] Figure 18 This is a structural schematic diagram of the first rotating ring in an automatic needle-changing multi-needle blood collection device of the present invention;

[0063] Figure 19 This is a structural schematic diagram of the second rotating ring in an automatic needle-changing multi-needle blood collection device of the present invention;

[0064] Figure 20 This is a structural diagram of the third rotation limiting ring in an automatic needle-changing multi-needle blood collection device of the present invention;

[0065] Figure 21 This is a schematic diagram of the assembly of a slider and a sliding button in an automatic needle-changing multi-needle lancing device of the present invention;

[0066] Figure 22 This is a schematic structural diagram of a multi-needle fixing assembly in an automatic needle-changing multi-needle blood collection device of the present invention;

[0067] Figure 23 This is a schematic diagram of the structure of the fixed needle in the automatic needle-changing multi-needle blood collection device of the present invention. Figure 1 ;

[0068] Figure 24 This is a schematic diagram of the structure of the fixed needle in the automatic needle-changing multi-needle blood collection device of the present invention. Figure 2 ;

[0069] Figure 25 This is a schematic diagram of the structure of the outer sleeve of an automatic needle-changing multi-needle blood collection device of the present invention. Figure 1 ;

[0070] Figure 26 This is a schematic diagram of the structure of the outer sleeve of an automatic needle-changing multi-needle blood collection device of the present invention. Figure 2 ;

[0071] Figure 27 This is a schematic structural diagram of a blood collection needle in an automatic needle-changing multi-needle blood collection device of the present invention;

[0072] Figure 28 This is a cross-sectional view of the combination of a fixed syringe and a blood collection needle in an automatic needle-changing multi-needle blood collection device of the present invention;

[0073] Figure 29 This is a schematic structural diagram of a depth adjustment component in an automatic needle-changing multi-needle lancing device of the present invention;

[0074] Figure 30 This is a cross-sectional view of a depth adjustment component in an automatic needle-changing multi-needle lancing device of the present invention;

[0075] Figure 31 This is a schematic diagram of the structure of the upper positioning ring in an automatic needle-changing multi-needle blood collection device of the present invention. Figure 1 ;

[0076] Figure 32 This is a schematic diagram of the structure of the upper positioning ring in an automatic needle-changing multi-needle blood collection device of the present invention. Figure 2 ;

[0077] Figure 33 This is a schematic structural diagram of a drive ring in an automatic needle-changing multi-needle blood collection device of the present invention;

[0078] Figure 34 This is a structural diagram of a lifting ring in an automatic needle-changing multi-needle blood collection device of the present invention;

[0079] Figure 35 This is a schematic diagram of the matching structure of the third rotation limiting ring and the transition cylinder in an automatic needle-changing multi-needle blood collection device of the present invention;

[0080] Figure 36 This is a schematic structural diagram of the connection between the driving cylinder and the transition cylinder in an automatic needle-changing multi-needle blood collection device of the present invention;

[0081] In the picture:

[0082] 1 fixed cylinder, 101-first observation window, 102-second observation window, 103-first positioning plug, 104-second positioning groove, 105-first positioning groove, 106-second positioning groove, 107-third observation window;

[0083] 2-needle-extraction drive structure, 21-drive rod, 211-drive head, 211-1, positioning block, 211-2, second clamping jaw, 211-3, rotating inclined plane, 212-drive portion, 212-1, positioning through hole, 213-contact rod, 214-clamping protrusion;

[0084] a-press moving assembly, a1-button, a1-1, pressing bar, a1-2, guide column, a1-3, first clamping claw, a1-4, rib, a1-5, moving limit block; a2-reset spring, a3-lifting spring, a4-driving cylinder, a4-1, card slot, a4-2, limiting ring, a4-3, positioning cylinder, a4-3-1, limiting block, a4-3-2, second limiting slot, a4-4, limiting cylinder, a4-4-1, positioning rod, a4-4-2, second positioning claw, a4-5, first limiting slot, a 4-6, second positioning block, a4-7, driving movable groove, a4-8, driving positioning groove, a4-9, movable limiting groove, a4-10, second limiting ring, a4-11, through groove, a5-transition cylinder, a5-1, first cylinder, a5-2, second cylinder, a5-3, third necking cylinder, a5-4, fourth cylinder, a5-4-1, protrusion II, a5-4-2, through hole, a5-4-3, third positioning block, a5-4-4, positioning block, a5-4-5, limiting vertical block, a6-torsion spring;

[0085] b-rotational positioning assembly, b1-first rotating ring, b1-1, rotating groove, b1-2, positioning column, b2-second rotating ring, b2-1, second rotating groove, b2-2, sliding channel, b2-3, sliding groove, b2-4, clamping block, b2-5, protrusion, b2-6, positioning groove, b3-third rotation limiting ring, b3-1, positioning arc plate, b3-2, positioning groove, b3-3, first positioning claw, b4-slider, b4-1, first groove, b4-2, second groove, b4-3, sliding through groove, b5-sliding button, b5-1, sliding slider, b5-2, dial block;

[0086] 3- Depth adjustment assembly, 31- Upper positioning ring, 311- First positioning protrusion, 312- First positioning notch, 313- Limiting protrusion, 314- First positioning boss, 315- Second positioning notch, 32- Driving ring, 321- Gear adjustment protrusion, 322- First spiral protrusion, 323- Arc protrusion, 33- Lifting ring, 331- Second positioning protrusion, 332- Spiral groove, 333- Second spiral protrusion, 34- Needle hole;

[0087] 4-Multi-needle fixing assembly, 41-Fixed needle cylinder, 410-Positioning cavity, 411-Third positioning notch, 412-Sixth positioning protrusion, 4121-Barb, 413-Seventh positioning protrusion, 4131-Shoulder fixing surface, 414-Fifth positioning notch, 415-Fixed column, 416-Ninth positioning protrusion, 417-Annular cylinder, 418-First needle hole; 42-Outer sleeve, 421-Sixth positioning groove, 422-Fifth positioning protrusion, 423-Seventh positioning groove, 424 Height limiting ring, 425-Eighth positioning protrusion, 426-Isolation boss, 427-Tenth positioning protrusion, 428-Second needle hole;

[0088] 5-blood collection needle, 51-needle, 52-protective sleeve, 521-fixed section, 522-driving section, 5221-ear hanging protrusion, 5224-third positioning protrusion, 5225-thin-wall area, 53-head. DETAILED DESCRIPTION

[0089] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0090] Reference Figures 1 to 3 A multi-needle lancing pen with automatic needle exchange includes a fixed barrel 1, a needle-extraction drive structure 2, a depth adjustment component 3, and a multi-needle fixed component 4. The bottom of the fixed barrel 1 is fixedly engaged with the depth adjustment component 3. The needle-extraction drive structure 2 and the multi-needle fixed component 4 are installed inside the fixed barrel 1, and the top of the needle-extraction drive structure 2 is arranged to pass through the fixed barrel 1. A plurality of blood collection needles 5 are arranged in the multi-needle fixed component 4. The needle-extraction drive structure 2 is provided with a drive rod 21 for driving the blood collection needles 5 to move up and down, so as to facilitate pressing the blood collection needles 5 to perform blood collection. Among them, the fixed barrel 1 is used to install and fix each component, the depth adjustment component 3 is used to adjust the needle-extraction length of the blood collection needle 5, the needle-extraction drive structure 2 is used to press the blood collection needle 5 to perform blood collection and needle exchange, ensuring that each blood collection needle 5 is used once, thereby ensuring safety; the multi-needle fixed component 4 is used to store multiple blood collection needles 5 at the same time, which is convenient for use and replacement.

[0091] Reference Figure 6 and Figure 7In this embodiment, the outer wall of the fixed barrel 1 is provided with a first observation window 101, a second observation window 102, a third observation window 107, a first positioning block 103, and a second positioning groove 104. The inner wall of the fixed barrel 1 is provided with two vertically symmetrical first positioning grooves 105 and two second positioning grooves 106. The first observation window 101 is used to observe whether the lancing device is in the debugging state or the use state. The second observation window 102 facilitates the upward and downward movement of the shift block b5-2, thereby changing the state of the lancing device. When the shift block b5-2 is in the upward position, the lancing device is in the debugging state. When the shift block b5-2 is in the downward position, the lancing device is in the use state and can be used directly for blood collection. The third observation window 107 is used to observe the number of lancets 5 used, thereby determining whether they need to be replaced. The first positioning block 103 and the second positioning groove 104 are used to securely mount the fixed barrel 1 to the upper positioning ring 31 of the depth adjustment assembly 3.

[0092] Reference Figures 4 to 5 The needle-extraction drive mechanism 2 includes a push-and-pull assembly a and a rotational positioning assembly b. The push-and-pull assembly a moves up and down, driving the rotational positioning assembly b to rotate. Pressing the push-and-pull assembly a downwards causes the rotational positioning assembly b to rotate, making it easier to press the lancet 5 for blood collection and replace it with a new one.

[0093] The pressing and moving assembly a includes a button a1, a return spring a2, a driving rod 21, a lifting spring a3, a driving cylinder a4, and a transition cylinder a5. Figure 8 As shown, the driving rod 21 includes a driving head 211 at the top and a driving portion 212 at the bottom. The driving portion 212 is fixedly provided with a contact rod 213, and the lower end of the contact rod 213 is provided with a clamping protrusion 214; Figure 9 As shown, the top and bottom ends of the return spring a2 are respectively clamped at the center of the top wall of the button a1 and the top of the drive head 211. For details, refer to Figure 10 and Figure 9The top wall of the button a1 is provided with a first clamping claw a1-3, the top of the driving head 211 is provided with a second clamping claw 211-2, and the two ends of the return spring a2 are respectively clamped in the first clamping claw a1-3 and the second clamping claw 211-2; the lifting spring a3 is sleeved on the outside of the driving part 212 and the two ends are respectively located at the bottom of the driving head 211 and the card slot a4-1 in the driving cylinder a4; the return spring a2 and the lifting spring a3 are respectively located above and below the driving head 211. When the button 1 is pressed and moved downward, the return spring a2 is compressed, and then it is restored. The positioning spring a2 is released to suppress the driving rod 21 to move downward, and the lifting spring a3 continues to store energy. Due to inertia, the driving rod 21 continues to move downward until the bottom of the driving part 212 contacts the top wall of the through groove a4-11. The driving rod 21 stops moving downward. At this time, the blood collection needle 5 is inserted, and the reset spring a2 is in a stretched state, and the lifting spring a3 is in a compressed state. Under the action of the two springs, the driving rod 21 retracts rapidly, so that its engaging protrusion 214 is stuck with the blood collection needle 5, driving the blood collection needle 5 to retract into the positioning cavity 410, thereby realizing the retraction of the blood collection needle 5.

[0094] like Figure 4 and 10 As shown, two groups of pressing strips a1-1 are symmetrically arranged at the bottom of the button a1, and the pressing strips a1-1 are arranged in the first positioning groove 105 and are connected by sliding up and down along the first positioning groove 105; this design limits the button a1 and the fixed cylinder 1, so that the button a1 can only move vertically up and down to prevent the two from rotating relative to each other; a guide column a1-2 is provided on the bottom inner wall of the pressing strip a1-1, the driving cylinder a4 is located below the button a1 and the pressing strip a1-1 is sleeved on the outside of the driving cylinder a4, and two second positioning blocks a4-6 are symmetrically provided on the outer wall of the driving cylinder a4, and the two second positioning blocks a4-6 are respectively clamped in the two second positioning grooves 106; the driving cylinder a4 and the fixed cylinder 1 are clamped and fixed to prevent the driving cylinder a4 from rotating; the driving rod 21 is located on the inner side of the driving cylinder a4, and the bottom outer side of the driving cylinder a4 is sleeved with a transition cylinder a5, and the transition cylinder a5 contacts the bottom wall of the limiting ring a4-2 on the outer wall of the driving cylinder a4. The limiting ring a4-2 restricts the transition tube a5 and the driving tube a4 from moving up and down, keeping them stable.

[0095] Reference Figure 6 、 Figure 7 and Figure 8A driving moving groove a4-7 is vertically provided on the driving cylinder a4, and a driving positioning groove a4-8 is also connected to the top of the driving moving groove a4-7; a positioning block 211-1 is provided on the outer wall of the driving head 211 of the driving rod 21, and the positioning block 211-1 is clamped in the driving positioning groove a4-8; a rotating inclined surface 211-3 is provided on the driving head 211, and a rib a1-4 is provided on the inner wall of the button a1, and the rib a1-4 is provided on the rotating inclined surface 2 11-3 is just above; in the normal state, the positioning block 211-1 is stuck in the driving positioning groove a4-8, but when in use, due to pressing the button a1 downward, the rib a1-4 presses the rotating inclined surface 211-3, thereby causing the driving rod 21 to rotate, and then the positioning block 211-1 is rotated out to the driving movable groove a4-7, and moves downward along the driving movable groove a4-7. At this time, the driving rod 21 continues to move downward, which can realize the function of ejecting the blood collection needle 5.

[0096] In addition, a positioning rod a4-4-1 is provided at the center of the limiting cylinder a4-4. A positioning through-hole 212-1 is defined within the driving portion 212. The top of the positioning rod a4-4-1 is inserted into the positioning through-hole 212-1. The driving cylinder a4 is provided with a through-slot a4-11 for the contact rod 213 to pass through. When the driving rod 21 moves downward, the contact rod 213, connected to the driving portion 212, passes through the through-slot a4-11 and contacts the lancet 5, thereby driving the lancet 5 downward. The bottom end of the driving portion 212 contacts the top wall of the through-slot a4-11, stopping the downward movement of the driving rod 21. Two symmetrical movement limit blocks a1-5 are provided on the button a1. A movement limit groove a4-9 is defined within the driving cylinder a4. A second limit ring a4-10 is provided on the side wall of the driving cylinder a4 and is located at the bottom of the movement limit groove a4-9. When the button a1 continues to move downward, when the movable limit block a1 - 5 contacts the second limit ring a4 - 10 , it reaches the lowest position.

[0097] Reference Figure 13 、 Figure 14 and Figure 17 The rotational positioning assembly b includes a first rotating ring b1, a second rotating ring b2, and a third rotating stop ring b3. These three rings are coaxially arranged from top to bottom, and are inserted into each other for positional fixation. Specifically, the bottom wall of the first rotating ring b1 is provided with multiple positioning posts b1-2, while the top wall of the second rotating ring b2 is provided with multiple positioning grooves b2-6. The positioning posts b1-2 are inserted into the positioning grooves b2-6. This design facilitates positioning and assembly of the first and second rotating rings b1 and b2.

[0098] like Figure 20As shown, a positioning arc plate b3-1 is provided on the top of the third rotating limit ring b3, and the positioning arc plate b3-1 is inserted into the second rotating ring b2 and a gap is set with the inner wall of the second rotating ring b2; this design facilitates the positioning and assembly of the second rotating ring b2 and the third rotating ring b3.

[0099] Reference Figure 18 and Figure 19 Two symmetrically arranged rotation grooves b1-1 are provided on the outer wall of the first rotating ring b1, and the guide columns a1-2 at the bottom of the two pressing strips a1-1 are respectively clamped in the two rotation grooves b1-1. Two symmetrically arranged second rotation grooves b2-1 are provided on the outer wall of the second rotating ring b2, and the two second rotation grooves b2-1 are arranged opposite to the bottom of the rotation groove b1-1. Two parallel sliding grooves b2-2 are provided on the outer wall of the second rotating ring b2 in the circumferential direction, and a vertical sliding groove b2-3 is provided on the groove wall at the center position of the sliding groove b2-2. A slider b4 is slidably connected in the sliding groove b2-3, and a sliding button b5 is also slidably connected to the slider b4; a number of positioning grooves b3-2 are provided on the circumference of the outer wall of the third rotation limit ring b3, among which the second rotation groove b2-1 and the sliding groove b2-3 are respectively connected to a positioning groove b3-2. The first rotating ring b1 and the second rotating ring b2 are fixedly connected, and the third rotating limit ring b3 and the second rotating ring b2 are connected by a slider b4. When the slider b4 moves downward and is located in the sliding groove b2-3 and the positioning groove b3-2 at the same time, the second rotating ring b2 and the third rotating limit ring b3 are fixed; when the slider b4 is only located in the sliding groove b2-3, the second rotating ring b2 and the third rotating limit ring b3 are not fixed.

[0100] Among them, a plurality of first positioning claws b3-3 are evenly arranged on the inner wall of the third rotation limit ring b3. The first positioning claws b3-3 are arranged corresponding to the grooves on the outer wall of the ring tube 417, and the end faces are engaged with the grooves of the ring tube 417, so that the first positioning claws b3-3 and the raised positions of the grooves on the outer wall of the ring tube 417 form a ratchet and pawl mechanism. When the third rotation limit ring b3 is fixed to the second rotation ring b2, it is in use. When the button a1 is moved downward, the guide column a1-2 moves along the rotation groove b1-1. Since the rotation groove b1-1 is inclined, the first rotation ring b1 rotates forward, thereby driving the second rotation ring b2 and the third rotation limit ring b3 to rotate forward. Since the third rotation limit ring b3 forms a ratchet and pawl mechanism with the ring tube 417 through the first positioning claws b3-3, the second positioning claws a4-4-2 of the drive tube a4 are engaged with the ring tube 417. Therefore, when the third rotation limit ring b3 rotates forward, it will not drive the ring tube 4 17 rotates, at which point the driving rod 21 directly ejects the lancet 5 for use; the guide post a1-2 sequentially passes through the rotating groove b1-1, the second rotating groove b2-1, and the positioning groove b3-2. As the button a1 moves downward, the driving rod 21 ejects the lancet 5 and then drives the lancet 5 back to its original position; when the button a1 is no longer pressed, the guide post a1-2 returns along the original path it previously moved downward. At this time, the first rotating ring b1, the second rotating ring b2, and the third rotating ring b3 rotate in opposite directions, and the first positioning claw b3-3 of the third rotating ring b3 drives the ring barrel 417 to rotate, thereby automatically replacing the lancet 5. Therefore, this design automatically replaces the lancet 5 with a new, unused one each time the button a1 returns, making it more convenient to use.

[0101] When the third rotation limit ring b3 and the second rotation ring b3 are not fixed, it is a debugging state. At this time, the rotation of the second rotation ring b2 will not drive the third rotation limit ring b3 to rotate. Therefore, when the button a1 is pressed, the same blood collection needle 5 is ejected. This state is suitable for adjusting the needle withdrawal length of the blood collection needle 5 and is used in conjunction with the depth adjustment component 3. It mainly adjusts the needle withdrawal length of the blood collection needle 5 to adapt to different blood collection specimens.

[0102] Specifically, refer to Figure 17 、 Figure 19 and Figure 21The bottom wall of the slideway b2-3 is provided with a block b2-4, and the bottom end of the block b2-4 is provided with a protrusion b2-5. The bottom wall of the slider b4 is provided with two grooves that can be fixedly engaged with the block b2-4: a first groove b4-1 and a second groove b4-2. The top wall of the slider b4 is provided with a sliding groove b4-3. The sliding button b5 is an arc-shaped plate with a shift block b5-2 provided on the top wall. The shift block b5-2 is provided through the second observation window 102. The bottom wall of the sliding button b5 is provided with a sliding block b5-1, which is inserted into the sliding groove b4-3. The sliding button b5 facilitates the upward and downward movement of the slider b4, thereby fixing and releasing the third rotation limit ring b3 to change the usage state of the lancing device. When the lancing pen is in the debugging state, the third rotation limit ring b3 is not connected to the second rotation ring b2. At this time, the shift block b5-2 is located at the top, and the second groove b4-2 of the slider b4 is engaged with the protrusion b2-5. At this time, the third rotation limit ring b3 does not rotate, and the needle extension length of the lancet 5 can be adjusted; when the lancing pen is in use, the shift block b5-2 is located at the bottom, driving the slider b4 to move downward in the slide groove b2-3 until the first groove b4-1 is engaged with the protrusion b2-5, then the third rotation limit ring b3 is fixed to the second rotation ring b2, which facilitates the automatic needle replacement of the lancet 5 during use.

[0103] In addition, the length of the sliding slider b5-1 is less than or equal to the width of the slider b4, and the width of the sliding slider b5-1 is less than the width of the sliding groove b2-2. When the second rotating ring b2 rotates, in order to prevent the sliding button b5 from obstructing the normal rotation of the second rotating ring b2, a sliding ring block b5-1 is provided so that the sliding button b5 can slide along the sliding groove b2-2, thereby ensuring the normal rotation of the second rotating ring b2.

[0104] In addition, since the interactive button b5 is an arc-shaped plate, the debugging status and the use status can be marked on the surface of the arc-shaped plate and displayed in the first observation window 101, which can facilitate the judgment of the status of the lancing device.

[0105] Reference Figure 15 and 16From top to bottom, the transition cylinder a5 includes an integrally formed first cylinder a5-1, a second cylinder a5-2, a third necked cylinder a5-3, and a fourth cylinder a5-4. The second cylinder a5-2, the third necked cylinder a5-3, and the fourth cylinder a5-4 are inserted into the first rotating ring b1 and the second rotating ring b2, and the first cylinder a5-1 is located between the first rotating ring b1 and the limit ring a4-2. The first cylinder a5-1 is arranged opposite the third observation window 107. Numbers can be evenly marked on the side wall of the first cylinder a5-1, starting with 1. The 1 can be marked in a prominent color such as red or yellow, and the marked numbers can be observed from the third observation window 107. During installation, the number 6 is placed opposite the third observation window 107. Then, as the bottom blood collection needle is replaced, the transition cylinder a5 rotates continuously. When the third observation window 107 displays the number 1, it indicates that a new blood collection needle is needed.

[0106] Reference Figure 14 and 15The inner wall of the fourth cylinder a5-4 is provided with a plurality of protrusions IIa5-4-1 on the circumference, one of the protrusions IIa5-4-1 is provided with a through hole a5-4-2 and a limiting vertical block a5-4-5 is provided on its top wall; a positioning cylinder a4-3 is provided at the bottom of the driving cylinder a4, the bottom of the positioning cylinder a4-3 is fixedly connected to the limiting cylinder a4-4, a first limiting groove a4-5 is provided at the bottom of the side wall of the driving cylinder a4, and a limiting block a5-4-5 is provided at the bottom of the positioning cylinder a4-3. 4-3-1. A second, open, limiting groove a4-3-2 is provided on one side of the limiting block a4-3-1. A torsion spring a6 is sleeved on the outside of the limiting cylinder a4-4. The first end of the torsion spring a6 is retained within the first limiting groove a4-5, and the second end of the torsion spring a6 is inserted into the through-hole a5-4-2. During assembly, the second end of the torsion spring a6 is passed through the second limiting groove a4-3-2 and then fitted onto the transition cylinder, allowing the second end to be inserted into the through-hole a5-4-2 of the transition cylinder a5. The bottom of the protrusion IIa5-4-1 extends beyond the bottom wall of the fourth cylinder a5-4 to form a third positioning block a5-4-3. This third positioning block a5-4-3 is retained within the groove of the annular cylinder 417, facilitating the securing of the annular cylinder 417 and the transition cylinder a5, allowing both to rotate simultaneously. A positioning block a5-4-4 is provided on the outer wall of one of the third positioning blocks a5-4-3. One side of the positioning arc b3-1 of the third rotation limit ring b3 engages with the third positioning block a5-4-3. Therefore, when the third rotation limit ring b3 rotates, after nearly one full rotation, its positioning arc b3-1 engages with the positioning block a5-4-4. Simultaneously, the limiting block a4-3-1 on the drive cylinder a4 abuts against the limiting vertical block a5-4-5 on the transition cylinder a5. At this point, the drive cylinder a4, transition cylinder a5, and third rotation limit ring b3 are all locked, preventing the lancing device from rotating further. At this point, the multi-needle fixing assembly 4, which is located at the bottom, needs to be removed to replace the lancet 5. Furthermore, due to the provision of a torsion spring a6, after the multi-needle fixing assembly 4 is removed, the transition cylinder a5 and the drive cylinder a4 return to their original positions under the elastic force of the torsion spring a6, i.e., the torsion spring a6 quickly resets the transition cylinder a5. Please refer to Figure 35 This figure shows the initial state of the third rotation limit ring b3 and the transition tube a5 during assembly. Figure 36 This figure shows the initial engagement state of the drive cylinder a4 and the transition cylinder a5 during assembly. As the third rotation limit ring b3 rotates, the ring cylinder 417 and the transition cylinder a5 are driven to rotate to change the needle. Until the transition cylinder a5 rotates nearly one circle, its positioning arc plate b3-1 abuts against the positioning block a5-4-4. At the same time, the limit block a4-3-1 on the drive cylinder a4 abuts against the other end face of the limit vertical block a5-4-5 on the transition cylinder a5, that is, the transition cylinder a5 is Figure 36On the basis of this, the limiting block a4-3-1 is rotated one circle so that the end face of the other side of the limiting vertical block a5-4-5 is engaged with each other. At this time, the third rotation limiting ring b3 is limited and fixed to prevent it from rotating again, thereby ensuring that the blood collection needle 5 is used only once.

[0107] like Figure 22 and Figure 28 As shown, in this embodiment, the multi-needle fixing assembly 4 includes a fixed syringe 41 and an outer sleeve 42. The fixed syringe 41 and the outer sleeve 42 are arranged coaxially. The outer sleeve 42 is sleeved on the outside of the fixed syringe 41 and is connected to the fixed syringe 41 by a locking mechanism. The fixed syringe 41 includes a fixed column 415 and an annular cylinder 417. The fixed column 415 and the annular cylinder 417 form multiple positioning cavities 410 through a partition. Multiple blood collection needles 5 are placed in the multiple positioning cavities 410. The bottom of the blood collection needles 5 is directly opposite to the first needle exit hole 418 and the second needle exit hole 428. The first needle exit hole 418 and the second needle exit hole 428 are respectively opened on the bottom wall of the fixed syringe 41 and the bottom wall of the outer sleeve 42. The outer sleeve 42 and the fixed syringe 41 are both made of elastic engineering plastic. The multi-needle fixing assembly 4 is used to fix and install multiple groups of blood collection needles 5 and cooperate with the rotary drive assembly b to rotate the blood collection needles 5, thereby achieving the purpose of replacing new blood collection needles 5.

[0108] like Figures 23 to 26 As shown, in this embodiment, a plurality of grooves are evenly arranged on the outer wall of the ring cylinder 417 to form a plum blossom shape, and a sixth positioning protrusion 412 and a seventh positioning protrusion 413 are fixedly arranged in each adjacent two grooves, respectively. The sixth positioning protrusion 412 and the seventh positioning protrusion 413 are tilted outward along the radial direction of the fixed needle cylinder 41; Figure 19 and 20As shown, the outer sleeve 42 is provided with a sixth positioning groove 421 and a seventh positioning groove 423 which respectively match the sixth positioning protrusion 412 and the seventh positioning protrusion 413. The sixth positioning groove 421 is a through-hole structure, and the seventh positioning groove 423 is concavely arranged along the radial direction of the outer sleeve 42; wherein, the sixth positioning protrusion 412 is arranged on the upper side of the seventh positioning protrusion 413, and the lower end of the sixth positioning protrusion 412 is provided with an upwardly raised hook 4121, and the seventh positioning protrusion 413 is provided with a shoulder fixing surface 4131; the hook 4121 of the sixth positioning protrusion 412 protrudes out of the sixth positioning groove 421, and a height limiting ring 424 is provided on the groove wall of the seventh positioning groove 423, and the shoulder fixing surface of the seventh positioning protrusion 413 is located on the lower side of the height limiting ring 424. The barb 4121 protrudes from the sixth positioning groove 421, which is used to limit the upper limit position of the fixed syringe 41. A height limiting ring 424 is provided to abut the shoulder fixing surface 4131 of the seventh positioning protrusion 413, thereby fixing the fixed syringe 41 at the lower limit position. When the fixed syringe 41 is assembled with the outer sleeve 42, the barb 4121 protrudes radially outward from the ring 417. When the blood collection needle 5 is completely used and removed, the sixth positioning protrusion 412 retracts, and the barb 4121 is locked in the upper end surface of the sixth positioning groove 421. At the same time, the shoulder fixing surface 4131 and the limiting ring 424 abut and cooperate to achieve axial positioning, thereby preventing the removed blood collection needle 5 from being reused and avoiding reuse.

[0109] In addition, the inner wall of the outer sleeve 42 is provided with a separation boss 426, which is located below the sixth positioning groove 421. The annular tube 417 is circumferentially limited by the multiple separation bosses 426. A fifth positioning protrusion 422 is provided at the center of the bottom wall of the outer sleeve 42, and a fifth positioning notch 414 is provided on the bottom wall of the fixed syringe 41 to match the fifth positioning protrusion 422. Both the fifth positioning protrusion 422 and the fifth positioning notch 414 are tapered and have a clearance fit. During installation, the fifth positioning protrusion 422 is inserted into the fifth positioning notch 414, providing guidance and positioning, ensuring quick mating between the outer sleeve 42 and the fixed syringe 41, thereby improving assembly precision and efficiency. A plurality of eighth positioning protrusions 425 are provided at the top of the inner wall of the outer sleeve 42, and a plurality of ninth positioning protrusions 416 are provided on the outer wall of the annular tube 417, with the eighth positioning protrusion 425 located above the ninth positioning protrusion 416. After assembly, the eighth positioning projection 425 is located above the ninth positioning projection 416, utilizing the principle of elasticity to achieve axial positioning of the outer sleeve 42 and the fixed syringe 41. Tenth positioning projections 427 are located adjacent to each sixth positioning groove 421 in the vertical direction, with the two tenth positioning projections 427 symmetrically arranged around the sixth positioning groove 421. The tenth positioning projections 427 serve two purposes: firstly, to increase the strength of the outer sleeve 42, thereby preventing the outer sleeve 42 from weakening at the sixth positioning groove 421; and secondly, to provide guidance and positioning during installation of the lancet assembly, thereby improving assembly accuracy.

[0110] In addition, in this embodiment, a second positioning claw a4-4-2 is provided on the limiting cylinder a4-4, and a plurality of first positioning claws b3-3 are evenly provided on the inner wall of the third rotation limit ring b3. The second positioning claw a4-4-2 and the first positioning claw b3-3 are both arranged corresponding to the groove of the outer wall of the ring cylinder 417 and the end face is clamped with the groove of the ring cylinder 417; and the first positioning claw b3-3 and the convex position of the groove of the outer wall of the ring cylinder 417 form a ratchet and pawl mechanism, and the second positioning claw a4-4-2 is clamped with the groove of the ring cylinder 417, which can prevent the multi-needle fixing assembly 4 from rotating reversely after rotation; the first positioning claw b3-3 is used to drive the ring cylinder 417 to rotate, so that it can change needles; a plurality of third positioning blocks a5-4-3 are provided on the bottom wall of the fourth cylinder a5-4, and the third positioning blocks a5-4-3 are clamped in the groove of the ring cylinder 417, which is convenient for fixing the ring cylinder 417 and the transition cylinder a5, so that the two rotate at the same time.

[0111] like Figure 29-34As shown, in this embodiment, the depth adjustment assembly 3 includes a coaxially arranged upper positioning ring 31, a driving ring 32 and a lifting ring 33, the lower outer ring of the upper positioning ring 31 is provided with a limiting protrusion 313, the upper end of the inner ring of the driving ring 32 is provided with a plurality of gear adjustment protrusions 321, the limiting protrusions 313 and the grooves formed between adjacent gear adjustment protrusions 321 are arranged correspondingly, the lower end of the inner ring of the driving ring 32 is provided with a first spiral protrusion 322, the lifting ring 33 is sleeved in the driving ring 32, the outer ring of the lifting ring 33 is provided with a spiral groove 332, the first spiral protrusion 322 is arranged in the spiral groove 332 and the two move relative to each other, and the lower end of the lifting ring 33 is provided with a pinhole 34.

[0112] like Figure 31 and 32 As shown, the upper end of the upper positioning ring 31 is provided with a concave positioning notch 312, and the inner ring of the upper positioning ring 31 is provided with a first positioning protrusion 311 protruding inward, the first positioning plug 103 on the fixed cylinder 1 is inserted into the positioning notch 312, and the first positioning protrusion 311 is clamped in the second positioning groove 104 on the fixed cylinder 1, thereby fixing the upper positioning ring 51 to the fixed cylinder 1.

[0113] Among them, the upper positioning ring 31, the drive ring 32 and the lifting ring 33 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.

[0114] The diameter of the lower end of the upper positioning ring 31 is smaller than the diameter of its upper end. The lower end of the upper positioning ring 31 extends into the interior of the drive ring 32, and the lower end of the upper positioning ring 31 is provided with a barbed first positioning boss 314; during actual installation, due to the use of engineering plastics, it has a certain elasticity. After the upper positioning ring 31 is locked, it penetrates into the upper end of the drive ring 32, and a groove body is formed between adjacent gear adjustment protrusions 321. At this time, the limiting protrusion 313 is stuck in the above-mentioned groove body, and at the same time, the first positioning boss 314 contacts the step structure formed at the bottom of the gear adjustment protrusion 321, ensuring the coordinated positioning of the upper positioning ring 31 and the drive ring 32 in the axial direction. The structure is simple and stable and reliable.

[0115] The spiral groove 332 is composed of a plurality of intermittently arranged second spiral protrusions 333 on both sides. The second spiral protrusions 333 are in contact with the inner ring of the drive ring 32 and are clearance-fitted, thereby avoiding shaking of the drive ring 32 and improving stability; the outer diameter of the drive ring 32 is less than or equal to the outer diameter of the top of the upper positioning ring 31, and the lower end of the drive ring 32 is provided with an arc protrusion 323, and the outer diameter of the arc protrusion 323 is larger than the outer diameter of the upper end of the drive ring 32; 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 322 is segmented and the second spiral protrusion 333 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 spirally set after snap-fitting. 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.

[0116] Reference Figures 31-34 The lower end of the upper positioning ring 31 is provided with a second positioning notch 315, and the upper end of the lifting ring 33 is provided with a second positioning protrusion 331. The second positioning protrusion 331 is disposed within the second positioning notch 315, and the two are arranged to slide up and down. This prevents the upper positioning ring 31 and the lifting ring 33 from rotating relative to each other. When the drive ring 32 is rotated, the lifting ring 33 moves axially under the action of the spiral groove 332. The up and down movement of the second positioning protrusion 331 within the second positioning notch 315 converts the rotation of the first spiral protrusion 322 within the spiral groove 332 into linear up and down motion of the lifting ring 33. At the same time, the two ends of the spiral groove 332 are not connected but sealed. This configuration helps to limit the up and down movement distance of the lifting ring 33, and also limits the rotation angle of the lifting ring 33.

[0117] like Figure 27 As shown, the blood collection needle 5 includes a needle 51 and a protective sleeve 52. The protective sleeve 52 includes an integrally formed driving section 522 and a fixed section 521. The needle 51 passes through the fixed section 521 and is fixed at the center of the fixed section 521. The driving section 522 is located at the upper end of the fixed section 521. The driving section 522 is provided with an ear-hanging protrusion 5221, a third positioning protrusion 5224 and a thin-walled area 5225; the bottom end of the needle 51 is provided with a sleeve 53, which is a soft rubber structure.

[0118] The thin-walled area 5225 is located at the upper end of the fixed section 521 and is concave outward. The driving portion 212 of the driving rod 21 is fixed with a contact rod 213 , and a clamping protrusion 214 is provided at the lower end of the contact rod 213 .

[0119] In this embodiment, the annular tube 417 is provided with a third positioning notch 411, which is adapted to engage with a third positioning protrusion 5224 on the lancet 5. Initially, the third positioning protrusion 5224 is positioned within the third positioning notch 411. When the drive rod 21 moves downward, the engaging protrusion 214 and the hook protrusion 5221 are not in contact, and the protective sleeve 52 deforms in the thin-walled region 5225, bending the protective sleeve 52 toward the central axis and extending the needle 51. When the drive rod 21 moves upward, the deformation of the thin-walled region 5225 causes the engaging protrusion 214 to engage with the hook protrusion 5221, thereby driving the protective sleeve 52 upward and retracting the needle 51.

[0120] Furthermore, the protective cover 52 is made of engineering plastic.

[0121] When the automatic needle-changing multi-needle blood collection device of the present invention is used:

[0122] The automatic needle-changing multi-needle lancet device of the present invention has two states: a debugging state and an in-use state. The debugging state uses the same lancet 5 to adjust the needle insertion length. The in-use state uses the lancet 5 for blood sampling, and when the button a1 is returned, a new lancet 5 is automatically replaced for the next use. Generally, during use, the needle insertion length of the lancet 5 is first determined according to the desired length. The first lancet 5 is then used for debugging until the desired length is reached. The device then switches to the in-use state for use.

[0123] When in debugging mode:

[0124] First, the manual adjustment block b5-2 is located on the upper side of the second observation window 102, and the debugging status can be displayed at the first observation port 101. At this time, the third rotation limit ring b3 and the second rotation ring b2 are in a separated state;

[0125] Secondly, manually press the button a1 to move downward, and the return spring a2 is compressed. Thereafter, the return spring a2 is released to press the driving rod 21 downward, and the lifting spring a3 continues to store energy. Due to inertia, the driving rod 21 continues to move downward until the bottom of the driving portion 212 contacts the top wall of the through groove a4-11, and the driving rod 21 stops moving downward. At this time, the return spring a2 is in a stretched state, and the lifting spring a3 is in a compressed state. The driving rod 21 retracts rapidly under the action of the two springs, so that its engaging protrusion 214 is stuck with the blood collection needle 5, driving the blood collection needle 5 to retract into the positioning cavity 410. According to this operation, the depth adjustment device 3 is used to adjust the needle length, that is, the driving ring 32 is rotated forward or reverse as needed to raise or lower the lifting ring 33;

[0126] Again, repeatedly press the button a1 and adjust the drive ring 32 until the needle length of the blood collection needle 5 reaches the requirement, and the debugging is completed.

[0127] When in use:

[0128] First, the manual adjustment block b5-3 is located at the lower side of the second observation window 102, and the first observation port 101 shows the use state. At this time, the third rotation limit ring b3 and the second rotation ring b2 are in a fixed state;

[0129] Secondly, manually press the button a1 to move downward. During the downward movement, the return spring a2 is compressed and the lifting spring a3 continues to store energy. Due to inertia, the driving rod 21 continues to move downward until the bottom of the driving part 212 contacts the top wall of the through groove a4-11. The driving rod 21 stops moving downward. At this time, the blood collection needle 5 is ejected and the skin is pierced. Because the return spring a2 is in a stretched state and the lifting spring a3 is in a compressed state, the driving rod 21 retracts rapidly under the action of the two springs, so that its engaging protrusion 214 is stuck with the blood collection needle 5, driving the blood collection needle 5 to retract into the positioning cavity 410. The blood collection needle 5 is stuck in the positioning cavity 410 again. At this time, the return spring a2 and the lifting spring a3 are in a balanced state. At the same time, during the downward movement of the button a1, the guide column a1-2 rotates along the groove b1 -1 moves, and since the rotating groove b1-1 is inclined, the first rotating ring b1 rotates forward, thereby driving the second rotating ring b2 and the third rotating limit ring b3 to rotate forward. Since the third rotating limit ring b3 forms a ratchet and pawl mechanism with the ring cylinder 417 through the first positioning claw b3-3, and the second positioning claw a4-4-2 of the driving cylinder a4 is engaged with the ring cylinder 417, when the third rotating limit ring b3 rotates forward, it will not drive the ring cylinder 417 to rotate; thereafter, the button a1 is loosened and the guide column a1-2 returns along the original path of downward movement. At this time, the first rotating ring b1, the second rotating ring b2 and the third rotating ring b3 rotate in opposite directions, and the first positioning claw b3-3 of the third rotating ring b3 drives the ring cylinder 417 to rotate, thereby replacing the blood collection needle 5 with the next unused one;

[0130] Once the first used blood collection needle 5 is replaced, it can be pressed for blood collection. The bottom of the lifting ring 33 is placed close to the carrier to be blood collected, and then the button 1 is pressed. The blood collection needle 5 is ejected to pierce the skin, and then the blood collection instrument can be used to collect the blood. The button 1 is loosened and the blood collection needle is replaced with a new blood collection needle 5 during the process of the button 1 returning to its original position, and the next blood sample can be collected.

[0131] Finally, when the needle is changed during use, the ring tube 417 and the transition tube a5 rotate at the same time, and then the torsion spring a6 is twisted. After the positioning arc plate b3-1 is engaged with the positioning block a5-4-4, the transition tube a5 and the third rotation limit ring b3 are stuck to each other, and the transition tube a5 and the driving tube a4 are stuck to each other. After the transition tube a5, the third rotation limit ring b3 and the driving tube a4 are stuck together, the ring tube 417 will not rotate again, that is, all the blood collection needles 5 have been used up and need to be replaced; at the same time, when the blood collection needles 5 are pulled out after all use, the torsion spring a6 can drive the transition tube a5 to quickly reset; in addition, when all the blood collection needles 5 have been used up, because the transition tube a5 rotates one circle, the number 1 is displayed at the third observation window 107, which shows that the blood collection needle 5 needs to be replaced, and it can be used again after timely replacement.

[0132] When replacing the blood collection needle 5, the operation is as follows:

[0133] First, unplug the depth adjustment component d;

[0134] Next, remove the multi-needle fixing assembly 4 with multiple blood collection needles 5. At this time, the torsion spring a6 drives the transition cylinder a5 to rotate in the opposite direction under the action of its torque until it abuts and fixes against the end of the limit block a4-3-1 away from the second limit groove a4-3-2, that is, returns to its original position;

[0135] Next, install the multi-needle fixing assembly 4 with the new blood collection needle 5, insert the third positioning block a5-4-3 into the groove of the ring cylinder 217, fix the transition cylinder a5 to the ring cylinder 217, and engage the end faces of the second positioning claw a4-4-2 and the first positioning claw b3-3 with the groove of the ring cylinder 417. Then adjust them to the appropriate position to complete the replacement.

[0136] After that, the depth adjustment component 3 is clamped and fixed to the fixed cylinder 1 again to complete the replacement and can continue to be used. It should be noted here that when using it for the first time after replacement, it is necessary to debug the needle length first and then use it after debugging.

[0137] 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. An automatic needle-changing multi-needle blood collection device, characterized by: The invention comprises a fixed cylinder (1), a needle-extraction drive structure (2), a depth adjustment component (3) and a multi-needle fixed component (4); the bottom of the fixed cylinder (1) is fixedly connected with the depth adjustment component (3); the needle-extraction drive structure (2) and the multi-needle fixed component (4) are installed inside the fixed cylinder (1) and the top of the needle-extraction drive structure (2) is arranged to pass through the fixed cylinder (1); a plurality of blood collection needles (5) are arranged in the multi-needle fixed component (4); a driving rod (21) for driving the blood collection needle (5) to move up and down is arranged in the needle-extraction drive structure (2), so that the blood collection needle (5) can be pressed down to perform blood collection; the needle-extraction drive structure (2) comprises a pressing and moving component The push-and-move assembly (a) comprises a button (a1), a reset spring (a2), a driving rod (21), a lifting spring (a3), a driving cylinder (a4), and a transition cylinder (a5); the driving rod (21) comprises a driving head (211) at the top and a driving portion (212) at the bottom; the top and bottom ends of the reset spring (a2) are respectively clamped at the center of the top wall of the button (a1) and the top of the driving head (211); the lifting spring (a3) is sleeved on the outside of the driving portion (212) and its two ends are respectively located at the bottom of the driving head (211) and in a clamping groove (a4-1) in the driving cylinder (a4); Two groups of pressing strips (a1-1) are symmetrically arranged at the bottom of the button (a1), and a guide column (a1-2) is arranged on the inner wall of the bottom of the pressing strip (a1-1). The driving cylinder (a4) is located below the button (a1) and the pressing strip (a1-1) is sleeved on the outside of the driving cylinder (a4). The driving rod (21) is located on the inner side of the driving cylinder (a4). A transition cylinder (a5) is sleeved on the outer side of the bottom of the driving cylinder (a4), and the transition cylinder (a5) contacts the bottom wall of the limiting ring (a4-2) on the outer wall of the driving cylinder (a4). The rotation positioning assembly (b) includes a first rotating ring (b1), a second rotating ring (b2) and a third rotating limiting ring (b3), wherein the first rotating ring (b1), the second rotating ring (b2) and the third rotating limiting ring (b3) are coaxially arranged from top to bottom, the first rotating ring (b1) and the second rotating ring (b2) are plugged in for position limiting and fixing, and a positioning arc plate (b3-1) is provided on the top of the third rotating limiting ring (b3), wherein the positioning arc plate (b3-1) is inserted in the second rotating ring (b2) and is provided with a gap between the positioning arc plate (b3-1) and the inner wall of the second rotating ring (b2); Two symmetrically arranged rotating grooves (b1-1) are provided on the outer wall of the first rotating ring (b1), and the guide posts (a1-2) at the bottom of the two pressing strips (a1-1) are respectively clamped in the two rotating grooves (b1-1). Two symmetrically arranged second rotating grooves (b2-1) are provided on the outer wall of the second rotating ring (b2), and the two second rotating grooves (b2-1) are arranged opposite to the bottom of the rotating groove (b1-1). Two parallel sliding grooves (b2-2) are provided on the outer wall of the second rotating ring (b2) in the circumferential direction, and a vertical sliding groove (b2-3) is provided on the groove wall at the center position of the sliding groove (b2-2), and a sliding block (b4) is slidably connected in the sliding groove (b2-3), and a sliding button (b5) is also slidably connected to the sliding block (b4); A plurality of positioning grooves (b3-2) are provided on the circumference of the outer wall of the third rotation limiting ring (b3), wherein the second rotation groove (b2-1) and the sliding groove (b2-3) are respectively connected to a corresponding positioning groove (b3-2).

2. The automatic needle-changing multi-needle lancing device according to claim 1, characterized in that: A card block (b2-4) is provided on the bottom wall of the slide groove (b2-3), and a protrusion (b2-5) is provided on the bottom side end of the card block (b2-4). Two grooves that are fixedly connected to the card block (b2-4) are provided on the bottom wall of the slider (b4), namely a first groove (b4-1) and a second groove (b4-2). A sliding groove (b4-3) is provided on the top wall of the slider (b4). The sliding button (b5) is an arc-shaped plate with a shift block (b5-2) provided on the top wall. A sliding slider (b5-1) is provided on the bottom wall of the sliding button (b5), and the sliding slider (b5-1) is inserted into the sliding groove (b4-3).

3. The automatic needle-changing multi-needle lancing device according to claim 2, characterized in that: The inner wall of the fourth cylinder (a5-4) is provided with a plurality of protrusions II (a5-4-1) on its circumference, wherein a through hole (a5-4-2) is provided on one of the protrusions II (a5-4-1) and a limiting vertical block (a5-4-5) is connected to the top thereof; a positioning cylinder (a4-3) is provided at the bottom of the driving cylinder (a4), the bottom of the positioning cylinder (a4-3) is fixedly connected to the limiting cylinder (a4-4), and a first limiting groove is provided at the bottom of the side wall of the driving cylinder (a4) (a4-5), a limiting block (a4-3-1) is provided at the bottom of the positioning cylinder (a4-3), an open second limiting groove (a4-3-2) is provided on one side of the limiting block (a4-3-1), a torsion spring (a6) is sleeved on the outer side of the limiting cylinder (a4-4), a first end of the torsion spring (a6) is clamped in the first limiting groove (a4-5), and a second end of the torsion spring (a6) is inserted in the through hole (a5-4-2) of the transition cylinder (a5).

4. The automatic needle-changing multi-needle lancing device according to claim 3, characterized in that: The outer wall of the fixed cylinder (1) is provided with a first observation window (101), a second observation window (102), a first positioning insert (103) and a second positioning groove (104); the inner wall of the fixed cylinder (1) is provided with two vertically symmetrical first positioning grooves (105) and two second positioning grooves (106); the first observation window (101) is provided opposite to the sliding button (b5); the shifting block (b5-2) is provided through the second observation window (102); The pressing strip (a1-1) is arranged in the first positioning groove (105) and is connected by sliding up and down along the first positioning groove (105); Two second positioning blocks (a4-6) are symmetrically arranged on the outer wall of the driving cylinder (a4), and the two second positioning blocks (a4-6) are respectively clamped in the two second positioning grooves (106).

5. The automatic needle-changing multi-needle lancing device according to claim 4, characterized in that: The multi-needle fixing assembly (4) comprises a fixed syringe (41) and an outer sleeve (42), wherein the fixed syringe (41) and the outer sleeve (42) are coaxially arranged, and the outer sleeve (42) is sleeved on the outside of the fixed syringe (41) and is connected to the fixed syringe (41) by a clamping connection; the fixed syringe (41) comprises a fixed column (415) and an annular cylinder (417), wherein the fixed column (415) and the annular cylinder (417) form a plurality of positioning cavities through a partition plate. (410), a plurality of the blood collection needles (5) are placed in a plurality of the positioning cavities (410), and a first needle outlet hole (418) and a second needle outlet hole (428) are arranged opposite to the bottom of the blood collection needle (5), and the first needle outlet hole (418) and the second needle outlet hole (428) are respectively opened on the bottom wall of the fixed syringe (41) and the bottom wall of the outer sleeve (42); the outer sleeve (42) and the fixed syringe (41) are both made of elastic engineering plastic.

6. The automatic needle-changing multi-needle lancing device according to claim 5, characterized in that: The outer wall of the ring cylinder (417) is evenly provided with a plurality of grooves to form a plum blossom shape, and a sixth positioning protrusion (412) and a seventh positioning protrusion (413) are fixedly provided in each two adjacent grooves, respectively, and the sixth positioning protrusion (412) and the seventh positioning protrusion (413) are tilted outward along the radial direction of the fixed needle cylinder (41); The outer sleeve (42) is provided with a sixth positioning groove (421) and a seventh positioning groove (423) respectively matching the sixth positioning protrusion (412) and the seventh positioning protrusion (413); the sixth positioning groove (421) is a through-hole structure, and the seventh positioning groove (423) is concavely arranged along the radial direction of the outer sleeve (42); An isolation boss (426) is provided on the inner wall of the outer sleeve (42), and the isolation boss (426) is provided below the sixth positioning groove (421). The annular sleeve (417) is axially limited by the plurality of isolation bosses (426).

7. The automatic needle-changing multi-needle lancing device according to claim 6, characterized in that: The limiting cylinder (a4-4) is provided with a second positioning claw (a4-4-2), and a plurality of first positioning claws (b3-3) are evenly provided on the inner wall of the third rotation limiting ring (b3). The second positioning claw (a4-4-2) and the first positioning claw (b3-3) are both arranged corresponding to the groove of the outer wall of the ring cylinder (417), and the end faces are clamped with the groove of the ring cylinder (417); and the first positioning claw (b3-3) and the raised position of the groove of the outer wall of the ring cylinder (417) form a ratchet and pawl mechanism. The bottom wall of the fourth cylinder (a5-4) is provided with a plurality of third positioning blocks (a5-4-3), and the third positioning blocks (a5-4-3) are clamped in the groove of the ring cylinder (417).

8. The automatic needle-changing multi-needle lancing device according to claim 7, characterized in that: The depth adjustment assembly (3) comprises an upper positioning ring (31), a driving ring (32) and a lifting ring (33) which are coaxially arranged. The lower outer ring of the upper positioning ring (31) is provided with a limiting protrusion (313). The upper end of the inner ring of the driving ring (32) is provided with a plurality of gear adjustment protrusions (321). The limiting protrusions (313) are arranged correspondingly to the gear adjustment protrusions (321). The lower end of the inner ring of the driving ring (32) is provided with a first spiral protrusion (322). The lifting ring (33) is sleeved in the driving ring (32). The outer ring of the lifting ring (33) is provided with a spiral groove (332). The first spiral protrusion (322) is arranged in the spiral groove (332) and the two move relative to each other. The lower end of the lifting ring (33) is provided with a pinhole (34).

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